When using accelerators in industry and medicine, important are the dimensions of the device used, especially the radial ones. In the linear electron accelerators based on a biperiodic retarding structure, which operates in the standing wave mode, there is a possibility to provide focusing of the accelerated particles with the help of high-frequency fields without the use of external focusing elements. In the accelerating cell, due to the presence of the far protruding drift sleeves, the electric field lines become strongly curved, which leads to the appearance in the regions adjacent to these sleeves of a substantial in magnitude radial component of the electric field. The particles entering the accelerating gap experience the action of a force directed toward the axis of the system, and at the exit, of a force directed away from the axis. Under certain conditions, alternation of the focusing and defocusing fields can lead to a general focusing effect.In the paper we study the focusing properties of a modified biperiodic structure with standing wave. The main attention is paid to the possibility of using the focusing properties of the electromagnetic accelerating field for guiding the electron beam through the aperture of the accelerating system, which will lead to a significant reduction in the accelerator sizes. The proposed method can be applied in the calculation and design of linear electron accelerators.
Radial dynamics of electrons in two-section linear acceleratorIJECEIAES
This article discusses possibility of harness wiring with the use of focusing system of high frequency eigenfields of accelerating resonators in standing wave linear accelerators on the basis of biperiodic slowing systems. The scopes of business activities and specificity of existing engineering processes applied in industry, especially in chemistry and metallurgy, require for special measures on environmental protection. At present electron linear accelerators operating in pulse mode are used for application purposes. Such accelerators can be characterized by sufficient beam power for efficient industrial use and for environmental protection. The results of numerical analysis of electron dynamics in two-section accelerator upon various initial conditions are presented. The obtained results are applied for development of actual accelerator, calculated and experimental data are given. The performed experimental study confirmed possibility of development of standing wave linear accelerator without external magnetic focusing system with output beam diameter of not higher than . The results of calculations of beam dynamics are experimentally verified.
The air streams from the outlet of an air compressor can be used to generate electricity. For instance, if a micro-sized Vertical-Axis Wind-Turbine (VAWT) is installed towards the airflow, some amount of electricity can be generated before being stored in a battery bank. The research’s objectives are to design, fabricate and analyze the performance of Helical Savonius VAWT blade rotors, which is tested with and without using a wind concentrator. The Helical Savonius VAWT is tested at 0 cm without the concentrator, whereas the blade rotor is tested at concave-blade position when using the concentrator. The blade and the wind concentrator designs were based on the dimensions and the constant airflow of the air compressor. The findings suggested that the blade produced its best performance when tested using wind concentrator at concave-blade position in terms of angular speed (ω), tip speed ratio (TSR) and the generated electrical power (PE). The findings concluded that the addition of wind concentrator increases the airflow which then provided better performances on the blades.
PERFORMANCE OF HYBRID ELECTROMAGNETIC DAMPER FOR VEHICLE SUSPENSIONijiert bestjournal
Suspension systems, in the automotive application context, have been designed to maintain
contact between a vehicle’s tires and the road, and to isolate the frame of the vehicle from road
disturbances. Dampers, or so-called shock absorbers, as the undeniable heart of suspension
systems, reduce the effect of a sudden bump by smoothing out the shock. In most shock
absorbers, the energy is converted into heat via viscous fluid. In hydraulic cylinders, the
hydraulic fluid is heated up. In air cylinders, the hot air is emitted into the atmosphere. There are
several common approaches for shock absorption, including material hysteresis, dry friction,
fluid friction, compression of gas, and eddy currents.
There are abundant of wave energy converter technologies available to convert wave energy into useable energy. However, most of them are huge and suitable for large application. Thus, this paper aimed to propose portable pico generator designs for small scale application. Investigation on the performance of designs with varying halbach magnet shapes was mainly focused and discussed. Two designs of different magnet shape i.e. triangular and trapezoid were proposed. Open-circuit simulation and optimization results were obtained using Finite Element Method. From the results, it was found out that Trapezoid Magnet Design produced better performance and lower material cost compared to another proposed design, Triangular Magnet as well as conventional Rectangular Magnet shape.
STUDY OF TRANSIENT STABILITY BY TRANSIENT ENERGY FUNCTIONcscpconf
Stability analysis programs are a primary tool used by power system planning and operating engineers to predict the response of the system to various disturbances. Important onclusionsand decisions are made based on the results of stability studies. The conventional method of analyzing stability is to calculate the transient behaviour of generators due to a given disturbance. Direct methods of stability analysis identify whether or not the system will remain stable once the disturbance is removed by comparing it with a calculated threshold value.Direct methods not only avoid the time consuming solutions required in the conventional
method, but also provide a quantitative measure of the degree of system stability. Thisadditional information makes direct methods very attractive when the relative stability of
different plans must be compared or when stability limits must be calculated quickly. Directmethods of transient stability analysis of a multi machine power system, using a
function describing the system's transient energy, are discussed. By examining thetrajectory of the disturbed system, the following fundamental questions are dealt with:the concept of a controlling unstable equilibrium point (U.E.P), the manner in whichsome generators tend to lose synchronism, and identifying the energy directlyresponsible for system separation. Resolving this issue will substantially improve transient stability analysis by direct method.
This paper discusses about design and analysis of double stator slotted rotor (DSSR) BLDC motor for electric bicycle application. Usually single stator (SS) BLDC motor is used in an electric bicycle. This type of motor has low performance and need to be charged regularly. The objective of this research is to design and analysis DSSR motor that have high torque. At starts, design specification for the electric bicycle is calculated. Next, design process for DSSR is carried out by using the desired parameter. Lastly, analysis for double stator slotted rotor is simulated using FEM. Result for average back emf, average inductance, inner stator flux density, outer stator flux density, average torque and estimate torque constant is obtained. Result for average torque from FEM archieve the requirement of motor torque for DSSR design where the maximum average torque is 16.2 Nm. This research will give benefit to mankind and society in term of environment protection and energy consumption.
Radial dynamics of electrons in two-section linear acceleratorIJECEIAES
This article discusses possibility of harness wiring with the use of focusing system of high frequency eigenfields of accelerating resonators in standing wave linear accelerators on the basis of biperiodic slowing systems. The scopes of business activities and specificity of existing engineering processes applied in industry, especially in chemistry and metallurgy, require for special measures on environmental protection. At present electron linear accelerators operating in pulse mode are used for application purposes. Such accelerators can be characterized by sufficient beam power for efficient industrial use and for environmental protection. The results of numerical analysis of electron dynamics in two-section accelerator upon various initial conditions are presented. The obtained results are applied for development of actual accelerator, calculated and experimental data are given. The performed experimental study confirmed possibility of development of standing wave linear accelerator without external magnetic focusing system with output beam diameter of not higher than . The results of calculations of beam dynamics are experimentally verified.
The air streams from the outlet of an air compressor can be used to generate electricity. For instance, if a micro-sized Vertical-Axis Wind-Turbine (VAWT) is installed towards the airflow, some amount of electricity can be generated before being stored in a battery bank. The research’s objectives are to design, fabricate and analyze the performance of Helical Savonius VAWT blade rotors, which is tested with and without using a wind concentrator. The Helical Savonius VAWT is tested at 0 cm without the concentrator, whereas the blade rotor is tested at concave-blade position when using the concentrator. The blade and the wind concentrator designs were based on the dimensions and the constant airflow of the air compressor. The findings suggested that the blade produced its best performance when tested using wind concentrator at concave-blade position in terms of angular speed (ω), tip speed ratio (TSR) and the generated electrical power (PE). The findings concluded that the addition of wind concentrator increases the airflow which then provided better performances on the blades.
PERFORMANCE OF HYBRID ELECTROMAGNETIC DAMPER FOR VEHICLE SUSPENSIONijiert bestjournal
Suspension systems, in the automotive application context, have been designed to maintain
contact between a vehicle’s tires and the road, and to isolate the frame of the vehicle from road
disturbances. Dampers, or so-called shock absorbers, as the undeniable heart of suspension
systems, reduce the effect of a sudden bump by smoothing out the shock. In most shock
absorbers, the energy is converted into heat via viscous fluid. In hydraulic cylinders, the
hydraulic fluid is heated up. In air cylinders, the hot air is emitted into the atmosphere. There are
several common approaches for shock absorption, including material hysteresis, dry friction,
fluid friction, compression of gas, and eddy currents.
There are abundant of wave energy converter technologies available to convert wave energy into useable energy. However, most of them are huge and suitable for large application. Thus, this paper aimed to propose portable pico generator designs for small scale application. Investigation on the performance of designs with varying halbach magnet shapes was mainly focused and discussed. Two designs of different magnet shape i.e. triangular and trapezoid were proposed. Open-circuit simulation and optimization results were obtained using Finite Element Method. From the results, it was found out that Trapezoid Magnet Design produced better performance and lower material cost compared to another proposed design, Triangular Magnet as well as conventional Rectangular Magnet shape.
STUDY OF TRANSIENT STABILITY BY TRANSIENT ENERGY FUNCTIONcscpconf
Stability analysis programs are a primary tool used by power system planning and operating engineers to predict the response of the system to various disturbances. Important onclusionsand decisions are made based on the results of stability studies. The conventional method of analyzing stability is to calculate the transient behaviour of generators due to a given disturbance. Direct methods of stability analysis identify whether or not the system will remain stable once the disturbance is removed by comparing it with a calculated threshold value.Direct methods not only avoid the time consuming solutions required in the conventional
method, but also provide a quantitative measure of the degree of system stability. Thisadditional information makes direct methods very attractive when the relative stability of
different plans must be compared or when stability limits must be calculated quickly. Directmethods of transient stability analysis of a multi machine power system, using a
function describing the system's transient energy, are discussed. By examining thetrajectory of the disturbed system, the following fundamental questions are dealt with:the concept of a controlling unstable equilibrium point (U.E.P), the manner in whichsome generators tend to lose synchronism, and identifying the energy directlyresponsible for system separation. Resolving this issue will substantially improve transient stability analysis by direct method.
This paper discusses about design and analysis of double stator slotted rotor (DSSR) BLDC motor for electric bicycle application. Usually single stator (SS) BLDC motor is used in an electric bicycle. This type of motor has low performance and need to be charged regularly. The objective of this research is to design and analysis DSSR motor that have high torque. At starts, design specification for the electric bicycle is calculated. Next, design process for DSSR is carried out by using the desired parameter. Lastly, analysis for double stator slotted rotor is simulated using FEM. Result for average back emf, average inductance, inner stator flux density, outer stator flux density, average torque and estimate torque constant is obtained. Result for average torque from FEM archieve the requirement of motor torque for DSSR design where the maximum average torque is 16.2 Nm. This research will give benefit to mankind and society in term of environment protection and energy consumption.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Model predictive control of magnetic levitation system IJECEIAES
In this work, we suggest a technique of controller design that applied to systems based on nonlinear. We inform the sufficient conditions for the stability of closed loop system. The asymptotic stability of equilibrium and the nonlinear controller can be applied to improvement the stability of magnetic levitation system (MagLev). The MAgLev nonlinear nodel can be obtained by state equation based on Lagrange function and model predictive control has been used for MagLev system.
“Test rig on Eddy current braking system” is a very great innovation on its own and is specially made for the purpose
to stop the wheel in minimum time. Brakes are the crucial components in any mobile system which are generally used to stop
the motion of any mobile. Such type of component must be checked by using the highly accurate methodology in order to
access its functional performance in advance. The inspection methodology of brakes should be accurate with less time
consuming procedure for its inspection. This test rig will check the brake in the least time which leads to a reduction of nonproductive
time and improves brake efficiency.
This paper presents an online efficiency optimization method for the interior permanent magnet synchronous motor (IPMSM) drive system in an electric vehicle (EV). The proposed method considers accurately the total system losses including fundamental copper and iron losses, harmonic copper and iron losses, magnet loss, and inverter losses. Therefore, it has the capability to always guarantee maximum efficiency control. A highly trusted machine model is built using finite element analysis (FEA). This model considers accurately the magnetic saturation, spatial harmonics, and iron loss effect. The overall system efficiency is estimated online based on the accurate determination of system loss, and then the optimum current angle is defined online for the maximum efficiency per ampere (MEPA) control. A series of results is conducted to show the effectiveness and fidelity of proposed method. The results show the superior performance of proposed method over the conventional offline efficiency optimization methods.
Structural analysis of the magnetic poles of the 20 MeV Injector Microtron.IOSR Journals
Raja Ramanna Centre for Advanced Technology (RRCAT) has developed a 20 MeV Microtron
used as an electron source for the 2.5 GeV INDUS -2 and 550 MeV INDUS -1particle accelerators. Due to the
presence of revolving electrons inside the Microtron cavity, an Ultra High Vacuum (UHV) is required to be
created inside it. This paper presents a structural analysis of the Microtron magnet poles as they are subjected
to the surrounding atmospheric pressure and the magnetic force of the dipole magnets. The aim of the analysis
is to determine whether the deflection produced in the magnetic poles affects the uniformity of the magnetic field
inside the Microtron cavity as a slight deflection in the magnetic field can cause the electrons to change their
paths and thus they will not come out of the Microtron and die out inside the cavity. The maximum deflection
and stress intensity were determined using ANSYS 12.0. The estimated maximum deflection was 0.124 μm which
does not have any significant effect on the uniformity of magnetic field. The estimated maximum stress intensity
was 4.3 MPa which is less than the yield strength of the material used.
According to statistical data, the south coast Yogyakarta has significant ocean wave height which can be used to generate electricity by using waveenergy-converter system. One of the simplest way to convert wave energy to electricity is using direct-drive wave-energy-conversion (WEC) system with permanent-magnet-linear-generator (PMLG). This method is simple because it does not need to convert linear motion to rotational motion. However, PMLG has large electric power losses, has great weight in both of the stator and rotor, and expensive to make. In this paper, a tri-core PMLG was designed. The electric power losses in the winding, translator weight, and material cost were ideally minimized using multiobjective optimization combined with simulated annealing (SA) algorithm. Then, the design was verified using finite element analysis. The optimized design of this PMLG was simulated using sinusoidal ocean waves which usually occur in the south coast of Yogyakarta to analyze the performance of this linear generator. Simulation result has been shown that this generator can generate 911 watt peak output power at the rated condition and at the optimum load with 81.14% efficiency. This confirms that the optimized design of PMLG is suitable for direct-drive WEC with low power losses and material cost.
Power Estimation for Wearable Piezoelectric Energy HarvesterTELKOMNIKA JOURNAL
The aim of this research work is to estimate the amount of electricity produced to power up wearable devices using a piezoelectric actuator, as an alternative to external power supply. A prototype of the device has been designed to continuously rotate a piezoelectric actuator mounted on a cantilever beam. A MATLAB® simulation was done to predict the amount of power harvested from human kinetic energy. Further simulation was conducted using COMSOL Multiphysics® to model a cantilever beam with piezoelectric layer. With the base excitation and the presence of tip mass at the beam, the natural frequencies and mode shapes have been analyzed to improve the amount of energy harvested. In this work, it was estimated that a maximum amount of power that could be generated is 250 μW with up to 5.5V DC output. The outcome from this research works will aid in optimising the design of the energy harvester. This research work provides optimistic possibility in harvesting sufficient energy required for wearable devices.
Design, Optimization and Analysis of a Radial Active Magnetic Bearing for Vib...ijtsrd
The most important aim of the project is to make use of the active vibration control technique to reduce vibration in composite shaft system using three nodded beam element. The fiber reinforced polymer FRP composite shaft is deliberate in this paper considering it as a Timoshenko beam. Three dissimilar isotropic rigid disks are mounted on it and also supported by two active magnetic bearings at its split ends. The work involves finite element, vibration and rotor dynamic analysis of the structure. Rotary inertia effect, gyroscopic effect kinetic energy and strain energy of the shaft are derived and studied. The governing equation is obtained by applying Hamilton's principle using finite element method in which four degrees of freedom at each node is considered. Active control scheme is applied through magnetic bearings by using a controller containing low pass filter, notch filter, sensor and amplifier which controls the current and correspondingly control the stability of the whole rotor shaft system. Campbell diagram, steadiness limit speed diagram and logarithmic decrement diagram are considered to establish the system stability. Effect of different types of stacking sequences are also studied and compared Jay Krishn Yadav | H. S. Sahu ""Design, Optimization and Analysis of a Radial Active Magnetic Bearing for Vibration Control"" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-4 , June 2019, URL: https://www.ijtsrd.com/papers/ijtsrd24040.pdf
Paper URL: https://www.ijtsrd.com/engineering/mechanical-engineering/24040/design-optimization-and-analysis-of-a-radial-active-magnetic-bearing-for-vibration-control/jay-krishn-yadav
A scheme for optical pulse generation using optoelectronic phase locked loopseSAT Journals
Abstract
A new scheme of optical pulse generation using multiple optoelectronic phase locked loops is proposed. The principle of the scheme
is combining three or more coherent optical waves having equal frequency separation. The coherencies of the optical waves are
attained by the use of optoelectronic phase locked loops. The repetition frequency of the generated optical pulse is equal to the
frequency of the reference microwave/ millimeter wave signal source used in the phase locked loop. The intensity profile of the
generated optical pulse and the pulse width are calculated. If four coherent optical carriers are combined, the generated optical pulse
has a typical width of 2.4 picoseconds. In the proposed scheme the central frequency of the optical pulse and the repetition frequency
can be varied. Since in this scheme, the superimposed optical waves are phase locked the associated phase noise of the optical pulse
will be low.
Keywords: optical pulse generation, optoelectronic phase locked loop, pulse repetition frequency, laser diode, photodiode
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
NOVEL METHODOLOGY OF THE ULTRA SONIC BEAM IN LINEAR ARRAY TRANSDUCER FOR HIGH...Journal For Research
In this paper, the focusing of ultrasound beam is considered. Electronic circuitry is considered as support to the theme of the work. The results presented in this paper are notable for improved resolution. The extension of the application diversity is also proposed based on use of Piezo electric transceducers.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Model predictive control of magnetic levitation system IJECEIAES
In this work, we suggest a technique of controller design that applied to systems based on nonlinear. We inform the sufficient conditions for the stability of closed loop system. The asymptotic stability of equilibrium and the nonlinear controller can be applied to improvement the stability of magnetic levitation system (MagLev). The MAgLev nonlinear nodel can be obtained by state equation based on Lagrange function and model predictive control has been used for MagLev system.
“Test rig on Eddy current braking system” is a very great innovation on its own and is specially made for the purpose
to stop the wheel in minimum time. Brakes are the crucial components in any mobile system which are generally used to stop
the motion of any mobile. Such type of component must be checked by using the highly accurate methodology in order to
access its functional performance in advance. The inspection methodology of brakes should be accurate with less time
consuming procedure for its inspection. This test rig will check the brake in the least time which leads to a reduction of nonproductive
time and improves brake efficiency.
This paper presents an online efficiency optimization method for the interior permanent magnet synchronous motor (IPMSM) drive system in an electric vehicle (EV). The proposed method considers accurately the total system losses including fundamental copper and iron losses, harmonic copper and iron losses, magnet loss, and inverter losses. Therefore, it has the capability to always guarantee maximum efficiency control. A highly trusted machine model is built using finite element analysis (FEA). This model considers accurately the magnetic saturation, spatial harmonics, and iron loss effect. The overall system efficiency is estimated online based on the accurate determination of system loss, and then the optimum current angle is defined online for the maximum efficiency per ampere (MEPA) control. A series of results is conducted to show the effectiveness and fidelity of proposed method. The results show the superior performance of proposed method over the conventional offline efficiency optimization methods.
Structural analysis of the magnetic poles of the 20 MeV Injector Microtron.IOSR Journals
Raja Ramanna Centre for Advanced Technology (RRCAT) has developed a 20 MeV Microtron
used as an electron source for the 2.5 GeV INDUS -2 and 550 MeV INDUS -1particle accelerators. Due to the
presence of revolving electrons inside the Microtron cavity, an Ultra High Vacuum (UHV) is required to be
created inside it. This paper presents a structural analysis of the Microtron magnet poles as they are subjected
to the surrounding atmospheric pressure and the magnetic force of the dipole magnets. The aim of the analysis
is to determine whether the deflection produced in the magnetic poles affects the uniformity of the magnetic field
inside the Microtron cavity as a slight deflection in the magnetic field can cause the electrons to change their
paths and thus they will not come out of the Microtron and die out inside the cavity. The maximum deflection
and stress intensity were determined using ANSYS 12.0. The estimated maximum deflection was 0.124 μm which
does not have any significant effect on the uniformity of magnetic field. The estimated maximum stress intensity
was 4.3 MPa which is less than the yield strength of the material used.
According to statistical data, the south coast Yogyakarta has significant ocean wave height which can be used to generate electricity by using waveenergy-converter system. One of the simplest way to convert wave energy to electricity is using direct-drive wave-energy-conversion (WEC) system with permanent-magnet-linear-generator (PMLG). This method is simple because it does not need to convert linear motion to rotational motion. However, PMLG has large electric power losses, has great weight in both of the stator and rotor, and expensive to make. In this paper, a tri-core PMLG was designed. The electric power losses in the winding, translator weight, and material cost were ideally minimized using multiobjective optimization combined with simulated annealing (SA) algorithm. Then, the design was verified using finite element analysis. The optimized design of this PMLG was simulated using sinusoidal ocean waves which usually occur in the south coast of Yogyakarta to analyze the performance of this linear generator. Simulation result has been shown that this generator can generate 911 watt peak output power at the rated condition and at the optimum load with 81.14% efficiency. This confirms that the optimized design of PMLG is suitable for direct-drive WEC with low power losses and material cost.
Power Estimation for Wearable Piezoelectric Energy HarvesterTELKOMNIKA JOURNAL
The aim of this research work is to estimate the amount of electricity produced to power up wearable devices using a piezoelectric actuator, as an alternative to external power supply. A prototype of the device has been designed to continuously rotate a piezoelectric actuator mounted on a cantilever beam. A MATLAB® simulation was done to predict the amount of power harvested from human kinetic energy. Further simulation was conducted using COMSOL Multiphysics® to model a cantilever beam with piezoelectric layer. With the base excitation and the presence of tip mass at the beam, the natural frequencies and mode shapes have been analyzed to improve the amount of energy harvested. In this work, it was estimated that a maximum amount of power that could be generated is 250 μW with up to 5.5V DC output. The outcome from this research works will aid in optimising the design of the energy harvester. This research work provides optimistic possibility in harvesting sufficient energy required for wearable devices.
Design, Optimization and Analysis of a Radial Active Magnetic Bearing for Vib...ijtsrd
The most important aim of the project is to make use of the active vibration control technique to reduce vibration in composite shaft system using three nodded beam element. The fiber reinforced polymer FRP composite shaft is deliberate in this paper considering it as a Timoshenko beam. Three dissimilar isotropic rigid disks are mounted on it and also supported by two active magnetic bearings at its split ends. The work involves finite element, vibration and rotor dynamic analysis of the structure. Rotary inertia effect, gyroscopic effect kinetic energy and strain energy of the shaft are derived and studied. The governing equation is obtained by applying Hamilton's principle using finite element method in which four degrees of freedom at each node is considered. Active control scheme is applied through magnetic bearings by using a controller containing low pass filter, notch filter, sensor and amplifier which controls the current and correspondingly control the stability of the whole rotor shaft system. Campbell diagram, steadiness limit speed diagram and logarithmic decrement diagram are considered to establish the system stability. Effect of different types of stacking sequences are also studied and compared Jay Krishn Yadav | H. S. Sahu ""Design, Optimization and Analysis of a Radial Active Magnetic Bearing for Vibration Control"" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-4 , June 2019, URL: https://www.ijtsrd.com/papers/ijtsrd24040.pdf
Paper URL: https://www.ijtsrd.com/engineering/mechanical-engineering/24040/design-optimization-and-analysis-of-a-radial-active-magnetic-bearing-for-vibration-control/jay-krishn-yadav
A scheme for optical pulse generation using optoelectronic phase locked loopseSAT Journals
Abstract
A new scheme of optical pulse generation using multiple optoelectronic phase locked loops is proposed. The principle of the scheme
is combining three or more coherent optical waves having equal frequency separation. The coherencies of the optical waves are
attained by the use of optoelectronic phase locked loops. The repetition frequency of the generated optical pulse is equal to the
frequency of the reference microwave/ millimeter wave signal source used in the phase locked loop. The intensity profile of the
generated optical pulse and the pulse width are calculated. If four coherent optical carriers are combined, the generated optical pulse
has a typical width of 2.4 picoseconds. In the proposed scheme the central frequency of the optical pulse and the repetition frequency
can be varied. Since in this scheme, the superimposed optical waves are phase locked the associated phase noise of the optical pulse
will be low.
Keywords: optical pulse generation, optoelectronic phase locked loop, pulse repetition frequency, laser diode, photodiode
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
NOVEL METHODOLOGY OF THE ULTRA SONIC BEAM IN LINEAR ARRAY TRANSDUCER FOR HIGH...Journal For Research
In this paper, the focusing of ultrasound beam is considered. Electronic circuitry is considered as support to the theme of the work. The results presented in this paper are notable for improved resolution. The extension of the application diversity is also proposed based on use of Piezo electric transceducers.
Resonance frequency analysis of laser optical fiber based on microcantileverIJECEIAES
The normal frequency of smart beams was originated utilizing FEM [Ansys and Comsol] code for first five modes by varying the position of actuator from the fixed end of the structure, and it has a suitable arrangement with analytically found the standard frequency. This paper includes learning a resonance frequency analysis of laser optical fiber based on microcantilever of designing magnetic actuator using Ansys and Comsol simulation. The design of optical fiber includes Nickel cantilever, two magnets and one coil that apply to force on the cantilever. After the current flows in the coil domain, the shape of microcantilever will be deformed. It will move to z- direction that depends on the force direction. Two methods including, Comsol Multiphysics, Ansys and analytical equations have been utilized to calculate the resonance frequency, current and force values. The simulation results include calculating the current (magnetic current density) and effects of the magnetic field of the coil on the cantilever (force calculation). Utilizing this method is to limit faults(errors) of optical fiber laser between transmitter and receiver system (detection system) for any time of cutting coil when the signal of a laser passes through the coil. In conculsions, resonant frequency (f_n) tuning using cantilivier presented in the resrach have larger variable range by using simulations. However,the adjusting of the system and changing the deminsions.Resolutions to this problematic contain tuning the modes of resonant frequency to produce by cantilivier with 2-magnets and coil when the signal pass from laser source. Based on these simulations and characterization results, the proposed assembly can be a good applicant for evolving a low price, high material platform for many biological, laser optical fiber, communication, machine learning, biosensors and biomedical applications.
Improving the performance parameters of microstrip patch antenna by using ebg...eSAT Journals
Abstract Antibiotic toxicity and multi drug resistant pathogens are the two greatest challenges being faced by today's medical world. In the present study, the antimicrobial activity of spices has been investigated as an alternative to antibiotics in order to tackle these dangers. In search of bioactive compound, methanol and acetone extract of 5 Indian spices were screened for antibacterial property. The choice of spice as an alternative is based on two basic reasons: firstly, plants have been the model source of medicine since ancient times and secondly, the increasing acceptance of herbal medicines by general population methanolic and acetone extracts were used to determine antifungal properties of the spices. The antifungal activity of five common Indian spices namely clove, ajwain, turmeric, dalchini and black pepper against two bacteria Aspergillus niger and Trichoderma sp. The results revealed that the methanol extracts of spices (MIC values of 20- 100 μl/ml) have high antimicrobial activities on all test organisms (range of inhibition, 6- 16 mm) as compare to acetone extracts of spices in same concentration. Results concluded that these spices contain high amount of secondary metabolites due to these metabolites they have high antimicrobial activity and it can be used as good bio- preservater and it can also use for medicinal purpose. Keywords: Antibacterial Properties, Secondary Metabolites, Multi Drug Resistant Pathogens.
modeling and characterization of mems electrostatic energy harvesterINFOGAIN PUBLICATION
In low-power wireless electronic devices, Energy harvesting generators have received increasing research interest in recent years. This paper describes the design and analysis of electrostatic transduction based MEMS energy harvester. Due to the benefit of a folded beam configuration that can be displace large dimensions and compliant in desired direction and stiffer in orthogonal direction. Since, large displacement of proof mass of energy harvester renders the enhance performance. Hence, the folded beam configuration of harvest has been modeled and designed and optimized the dimension of geometry. FEM simulations using COMSOL were conducted to evaluate the natural frequency and mode shape of the system and compared results with that of analytically calculated values. Spice circuit of harvester has been modeled and performed simulation to evaluate the output power of the harvester in LTSPICE. Parameter analysis was conducted to determine the optimal load and optimal output power.
COUPLED FIELD ANALYSIS OF PIEZOELECTRIC CANTILEVER BEAMijiert bestjournal
Electromechanical modelling efforts in the research field of vibration-based energy harvesting have been mostly focused on forms of vibrational in put as in the typical case of harmonic excitation at resonance. However,ambient vibration al energy often has broader frequency content than a single harmonic. Piezoelectric energ y harvesting is a promising technology for extracting the power from environmental vibrations. It generates the electrical power of few orders of amplitudes which is sufficient to drive s everal autonomous electrical devices. Such vibration-based energy harvester generates the most energy when the generator is excited at its resonance frequency. Simplest model to be start ed is of rectangular Aluminium cantilever beam with unimorph piezoelectric patch which is per fectly bonded to the substrate plate at the end. The resulting relative motion between the piez oelectric patch and the base produces stress on piezoelectric material,which is converte d into electrical power by virtue of direct piezoelectric effect. The ability of piezoelectric material of different thickness to generate voltage at different frequency is explained in this paper. Its capability to work over a range of frequency is predicted by use of ANSYS software. Th e solid model is design and analyzed using finite element software.
Abstract This Paper Proposes is to design a magnetic actuator to deal with the modeling and optimization of Solenoid actuator (Magnetic Actuator). The design is very important step for the study proportional solenoid valve. The magnetic actuator includes design optimization, micro analysis and calculations and experimental characterization one of the magnetic actuator. All these magnetic actuators work in sub- micron level movement used in micro system and valve applications. Proportional solenoid valve designed in find out the magnetic force (N), magnetic field intensity (A/m), magnetic flux density (Tesla or wb/m2). To enhance the magnetic force and reduction of size by magnetic field in air gap of solenoid valve. Permanent magnetic bias magnetic actuator study for bidirectional application using different permanent magnet material and optimization of size of armature. Key Words: Electromagnet, Solenoid actuator, Modeling, Design Rules,
Investigation of Effect Ion Refocusing From the GaP(001)<110> Surface at the ...ijtsrd
The effect ion refocusing at the small angle scattering Ne+ ions from the GaP(001) surface have been studied by the computer simulation method. The characteristic trajectories refocusing ions have been studied. Kutliev UchkunOtoboevich | Tangriberganov Ismoil Urazboyevich | Karimov Muxtor Karimberganovich | Otaboeva Kamola Uchqun qizi"Investigation of Effect Ion Refocusing From the GaP(001) Surface at the Grazing Incidence Ne+ Ions" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-1 | Issue-5 , August 2017, URL: http://www.ijtsrd.com/papers/ijtsrd2397.pdf http://www.ijtsrd.com/physics/computational-physics/2397/investigation-of-effect-ion-refocusing-from-the-gap001110-surface--at-the-grazing-incidence-ne-ions/kutliev-uchkunotoboevich
Effect of mesh grid structure in reducing hot carrier effect of nmos device s...ijcsa
This paper presents the critical effect of mesh grid that should be considered during process and device
simulation using modern TCAD tools in order to develop and optimize their accurate electrical
characteristics. Here, the computational modelling process of developing the NMOS device structure is
performed in Athena and Atlas. The effect of Mesh grid on net doping profile, n++, and LDD sheet
resistance that could link to unwanted “Hot Carrier Effect” were investigated by varying the device grid
resolution in both directions. It is found that y-grid give more profound effect in the doping concentration,
the junction depth formation and the value of threshold voltage during simulation. Optimized mesh grid is
obtained and tested for more accurate and faster simulation. Process parameter (such as oxide thicknesses
and Sheet resistance) as well as Device Parameter (such as linear gain “beta” and SPICE level 3 mobility
roll-off parameter “ Theta”) are extracted and investigated for further different applications.
High Performance Germanium Double Gate N-MOSFETIJMER
The current MOSFET technology supports scaling down to nanometer. To achieve
enhanced transistor switching, it is difficult to keep the equivalent driver current at the same level
since it changes by the certain restrictions like effective masses, density of states, uniaxial- and
biaxial- strain; band structure, channel orientation, channel mobility, off-state leakage, switching
delay in nano-scale and parasitic latch up. Current strained-Si is the ruling technology for
intensifying the performance of MOSFET and development of strain can provide a better solution to
the scaling. The future of nano-scale MOSFETs relies on exploration of novel higher mobility channel
materials such as stained-Ge and strained III-V groups that might perform even better than very
highly strained-Si. In addition, parameters such as injection velocity, short channel length effect and
Band-to-Band Tunneling (BTBT) result in reduction of inversion charge, increase in leakage current,
resulting in decrease in the drive current. While developing accurate model of MOSFETs all these
complex effects should be captured. It is proposed to
1. Design high performance double gate n-MOSFET with channel material Ge.
2. Benchmarked & stimulate high performance double gate n-MOSFET by using the simulation
techniques.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
A new hybrid method for mutual coupling minimization of an antenna array IJECEIAES
In this paper, a simultaneous application of geometric modification on patch elements and electromagnetic band gap (EBG) electromagnetic bandgap structures (hybrid method) has been suggested for 3.5 GHz wireless communication applications, to minimize the mutual coupling between radiating elements of microstrip array antennas. The suggested EBG slotted structure is composed of a one square ring and three squares placed on Rogers RO3010 having 10.2 and h=1.27 mm which presents respectively its dielectric constant and thickness. In this approach, the patch elements are geometrically modified, while also employing EBG structures, formed by four EBG cells, placed between the array elements at a near distance. The modification of the geometry of the antenna and the introduction of EBG reduces the mutual coupling of an array antenna with approximately 33 dB on the one hand and improves the antenna gain by approximately 0.43 dB on the other hand. Initially, slots are introduced in the patch geometry and then four EBG unit cells are inserted between two patches, operating at 3.5 GHz. The antenna array design parameters were optimized.
Bibliometric analysis highlighting the role of women in addressing climate ch...IJECEIAES
Fossil fuel consumption increased quickly, contributing to climate change
that is evident in unusual flooding and draughts, and global warming. Over
the past ten years, women's involvement in society has grown dramatically,
and they succeeded in playing a noticeable role in reducing climate change.
A bibliometric analysis of data from the last ten years has been carried out to
examine the role of women in addressing the climate change. The analysis's
findings discussed the relevant to the sustainable development goals (SDGs),
particularly SDG 7 and SDG 13. The results considered contributions made
by women in the various sectors while taking geographic dispersion into
account. The bibliometric analysis delves into topics including women's
leadership in environmental groups, their involvement in policymaking, their
contributions to sustainable development projects, and the influence of
gender diversity on attempts to mitigate climate change. This study's results
highlight how women have influenced policies and actions related to climate
change, point out areas of research deficiency and recommendations on how
to increase role of the women in addressing the climate change and
achieving sustainability. To achieve more successful results, this initiative
aims to highlight the significance of gender equality and encourage
inclusivity in climate change decision-making processes.
Voltage and frequency control of microgrid in presence of micro-turbine inter...IJECEIAES
The active and reactive load changes have a significant impact on voltage
and frequency. In this paper, in order to stabilize the microgrid (MG) against
load variations in islanding mode, the active and reactive power of all
distributed generators (DGs), including energy storage (battery), diesel
generator, and micro-turbine, are controlled. The micro-turbine generator is
connected to MG through a three-phase to three-phase matrix converter, and
the droop control method is applied for controlling the voltage and
frequency of MG. In addition, a method is introduced for voltage and
frequency control of micro-turbines in the transition state from gridconnected mode to islanding mode. A novel switching strategy of the matrix
converter is used for converting the high-frequency output voltage of the
micro-turbine to the grid-side frequency of the utility system. Moreover,
using the switching strategy, the low-order harmonics in the output current
and voltage are not produced, and consequently, the size of the output filter
would be reduced. In fact, the suggested control strategy is load-independent
and has no frequency conversion restrictions. The proposed approach for
voltage and frequency regulation demonstrates exceptional performance and
favorable response across various load alteration scenarios. The suggested
strategy is examined in several scenarios in the MG test systems, and the
simulation results are addressed.
Enhancing battery system identification: nonlinear autoregressive modeling fo...IJECEIAES
Precisely characterizing Li-ion batteries is essential for optimizing their
performance, enhancing safety, and prolonging their lifespan across various
applications, such as electric vehicles and renewable energy systems. This
article introduces an innovative nonlinear methodology for system
identification of a Li-ion battery, employing a nonlinear autoregressive with
exogenous inputs (NARX) model. The proposed approach integrates the
benefits of nonlinear modeling with the adaptability of the NARX structure,
facilitating a more comprehensive representation of the intricate
electrochemical processes within the battery. Experimental data collected
from a Li-ion battery operating under diverse scenarios are employed to
validate the effectiveness of the proposed methodology. The identified
NARX model exhibits superior accuracy in predicting the battery's behavior
compared to traditional linear models. This study underscores the
importance of accounting for nonlinearities in battery modeling, providing
insights into the intricate relationships between state-of-charge, voltage, and
current under dynamic conditions.
Smart grid deployment: from a bibliometric analysis to a surveyIJECEIAES
Smart grids are one of the last decades' innovations in electrical energy.
They bring relevant advantages compared to the traditional grid and
significant interest from the research community. Assessing the field's
evolution is essential to propose guidelines for facing new and future smart
grid challenges. In addition, knowing the main technologies involved in the
deployment of smart grids (SGs) is important to highlight possible
shortcomings that can be mitigated by developing new tools. This paper
contributes to the research trends mentioned above by focusing on two
objectives. First, a bibliometric analysis is presented to give an overview of
the current research level about smart grid deployment. Second, a survey of
the main technological approaches used for smart grid implementation and
their contributions are highlighted. To that effect, we searched the Web of
Science (WoS), and the Scopus databases. We obtained 5,663 documents
from WoS and 7,215 from Scopus on smart grid implementation or
deployment. With the extraction limitation in the Scopus database, 5,872 of
the 7,215 documents were extracted using a multi-step process. These two
datasets have been analyzed using a bibliometric tool called bibliometrix.
The main outputs are presented with some recommendations for future
research.
Use of analytical hierarchy process for selecting and prioritizing islanding ...IJECEIAES
One of the problems that are associated to power systems is islanding
condition, which must be rapidly and properly detected to prevent any
negative consequences on the system's protection, stability, and security.
This paper offers a thorough overview of several islanding detection
strategies, which are divided into two categories: classic approaches,
including local and remote approaches, and modern techniques, including
techniques based on signal processing and computational intelligence.
Additionally, each approach is compared and assessed based on several
factors, including implementation costs, non-detected zones, declining
power quality, and response times using the analytical hierarchy process
(AHP). The multi-criteria decision-making analysis shows that the overall
weight of passive methods (24.7%), active methods (7.8%), hybrid methods
(5.6%), remote methods (14.5%), signal processing-based methods (26.6%),
and computational intelligent-based methods (20.8%) based on the
comparison of all criteria together. Thus, it can be seen from the total weight
that hybrid approaches are the least suitable to be chosen, while signal
processing-based methods are the most appropriate islanding detection
method to be selected and implemented in power system with respect to the
aforementioned factors. Using Expert Choice software, the proposed
hierarchy model is studied and examined.
Enhancing of single-stage grid-connected photovoltaic system using fuzzy logi...IJECEIAES
The power generated by photovoltaic (PV) systems is influenced by
environmental factors. This variability hampers the control and utilization of
solar cells' peak output. In this study, a single-stage grid-connected PV
system is designed to enhance power quality. Our approach employs fuzzy
logic in the direct power control (DPC) of a three-phase voltage source
inverter (VSI), enabling seamless integration of the PV connected to the
grid. Additionally, a fuzzy logic-based maximum power point tracking
(MPPT) controller is adopted, which outperforms traditional methods like
incremental conductance (INC) in enhancing solar cell efficiency and
minimizing the response time. Moreover, the inverter's real-time active and
reactive power is directly managed to achieve a unity power factor (UPF).
The system's performance is assessed through MATLAB/Simulink
implementation, showing marked improvement over conventional methods,
particularly in steady-state and varying weather conditions. For solar
irradiances of 500 and 1,000 W/m2
, the results show that the proposed
method reduces the total harmonic distortion (THD) of the injected current
to the grid by approximately 46% and 38% compared to conventional
methods, respectively. Furthermore, we compare the simulation results with
IEEE standards to evaluate the system's grid compatibility.
Enhancing photovoltaic system maximum power point tracking with fuzzy logic-b...IJECEIAES
Photovoltaic systems have emerged as a promising energy resource that
caters to the future needs of society, owing to their renewable, inexhaustible,
and cost-free nature. The power output of these systems relies on solar cell
radiation and temperature. In order to mitigate the dependence on
atmospheric conditions and enhance power tracking, a conventional
approach has been improved by integrating various methods. To optimize
the generation of electricity from solar systems, the maximum power point
tracking (MPPT) technique is employed. To overcome limitations such as
steady-state voltage oscillations and improve transient response, two
traditional MPPT methods, namely fuzzy logic controller (FLC) and perturb
and observe (P&O), have been modified. This research paper aims to
simulate and validate the step size of the proposed modified P&O and FLC
techniques within the MPPT algorithm using MATLAB/Simulink for
efficient power tracking in photovoltaic systems.
Adaptive synchronous sliding control for a robot manipulator based on neural ...IJECEIAES
Robot manipulators have become important equipment in production lines, medical fields, and transportation. Improving the quality of trajectory tracking for
robot hands is always an attractive topic in the research community. This is a
challenging problem because robot manipulators are complex nonlinear systems
and are often subject to fluctuations in loads and external disturbances. This
article proposes an adaptive synchronous sliding control scheme to improve trajectory tracking performance for a robot manipulator. The proposed controller
ensures that the positions of the joints track the desired trajectory, synchronize
the errors, and significantly reduces chattering. First, the synchronous tracking
errors and synchronous sliding surfaces are presented. Second, the synchronous
tracking error dynamics are determined. Third, a robust adaptive control law is
designed,the unknown components of the model are estimated online by the neural network, and the parameters of the switching elements are selected by fuzzy
logic. The built algorithm ensures that the tracking and approximation errors
are ultimately uniformly bounded (UUB). Finally, the effectiveness of the constructed algorithm is demonstrated through simulation and experimental results.
Simulation and experimental results show that the proposed controller is effective with small synchronous tracking errors, and the chattering phenomenon is
significantly reduced.
Remote field-programmable gate array laboratory for signal acquisition and de...IJECEIAES
A remote laboratory utilizing field-programmable gate array (FPGA) technologies enhances students’ learning experience anywhere and anytime in embedded system design. Existing remote laboratories prioritize hardware access and visual feedback for observing board behavior after programming, neglecting comprehensive debugging tools to resolve errors that require internal signal acquisition. This paper proposes a novel remote embeddedsystem design approach targeting FPGA technologies that are fully interactive via a web-based platform. Our solution provides FPGA board access and debugging capabilities beyond the visual feedback provided by existing remote laboratories. We implemented a lab module that allows users to seamlessly incorporate into their FPGA design. The module minimizes hardware resource utilization while enabling the acquisition of a large number of data samples from the signal during the experiments by adaptively compressing the signal prior to data transmission. The results demonstrate an average compression ratio of 2.90 across three benchmark signals, indicating efficient signal acquisition and effective debugging and analysis. This method allows users to acquire more data samples than conventional methods. The proposed lab allows students to remotely test and debug their designs, bridging the gap between theory and practice in embedded system design.
Detecting and resolving feature envy through automated machine learning and m...IJECEIAES
Efficiently identifying and resolving code smells enhances software project quality. This paper presents a novel solution, utilizing automated machine learning (AutoML) techniques, to detect code smells and apply move method refactoring. By evaluating code metrics before and after refactoring, we assessed its impact on coupling, complexity, and cohesion. Key contributions of this research include a unique dataset for code smell classification and the development of models using AutoGluon for optimal performance. Furthermore, the study identifies the top 20 influential features in classifying feature envy, a well-known code smell, stemming from excessive reliance on external classes. We also explored how move method refactoring addresses feature envy, revealing reduced coupling and complexity, and improved cohesion, ultimately enhancing code quality. In summary, this research offers an empirical, data-driven approach, integrating AutoML and move method refactoring to optimize software project quality. Insights gained shed light on the benefits of refactoring on code quality and the significance of specific features in detecting feature envy. Future research can expand to explore additional refactoring techniques and a broader range of code metrics, advancing software engineering practices and standards.
Smart monitoring technique for solar cell systems using internet of things ba...IJECEIAES
Rapidly and remotely monitoring and receiving the solar cell systems status parameters, solar irradiance, temperature, and humidity, are critical issues in enhancement their efficiency. Hence, in the present article an improved smart prototype of internet of things (IoT) technique based on embedded system through NodeMCU ESP8266 (ESP-12E) was carried out experimentally. Three different regions at Egypt; Luxor, Cairo, and El-Beheira cities were chosen to study their solar irradiance profile, temperature, and humidity by the proposed IoT system. The monitoring data of solar irradiance, temperature, and humidity were live visualized directly by Ubidots through hypertext transfer protocol (HTTP) protocol. The measured solar power radiation in Luxor, Cairo, and El-Beheira ranged between 216-1000, 245-958, and 187-692 W/m 2 respectively during the solar day. The accuracy and rapidity of obtaining monitoring results using the proposed IoT system made it a strong candidate for application in monitoring solar cell systems. On the other hand, the obtained solar power radiation results of the three considered regions strongly candidate Luxor and Cairo as suitable places to build up a solar cells system station rather than El-Beheira.
An efficient security framework for intrusion detection and prevention in int...IJECEIAES
Over the past few years, the internet of things (IoT) has advanced to connect billions of smart devices to improve quality of life. However, anomalies or malicious intrusions pose several security loopholes, leading to performance degradation and threat to data security in IoT operations. Thereby, IoT security systems must keep an eye on and restrict unwanted events from occurring in the IoT network. Recently, various technical solutions based on machine learning (ML) models have been derived towards identifying and restricting unwanted events in IoT. However, most ML-based approaches are prone to miss-classification due to inappropriate feature selection. Additionally, most ML approaches applied to intrusion detection and prevention consider supervised learning, which requires a large amount of labeled data to be trained. Consequently, such complex datasets are impossible to source in a large network like IoT. To address this problem, this proposed study introduces an efficient learning mechanism to strengthen the IoT security aspects. The proposed algorithm incorporates supervised and unsupervised approaches to improve the learning models for intrusion detection and mitigation. Compared with the related works, the experimental outcome shows that the model performs well in a benchmark dataset. It accomplishes an improved detection accuracy of approximately 99.21%.
Developing a smart system for infant incubators using the internet of things ...IJECEIAES
This research is developing an incubator system that integrates the internet of things and artificial intelligence to improve care for premature babies. The system workflow starts with sensors that collect data from the incubator. Then, the data is sent in real-time to the internet of things (IoT) broker eclipse mosquito using the message queue telemetry transport (MQTT) protocol version 5.0. After that, the data is stored in a database for analysis using the long short-term memory network (LSTM) method and displayed in a web application using an application programming interface (API) service. Furthermore, the experimental results produce as many as 2,880 rows of data stored in the database. The correlation coefficient between the target attribute and other attributes ranges from 0.23 to 0.48. Next, several experiments were conducted to evaluate the model-predicted value on the test data. The best results are obtained using a two-layer LSTM configuration model, each with 60 neurons and a lookback setting 6. This model produces an R 2 value of 0.934, with a root mean square error (RMSE) value of 0.015 and a mean absolute error (MAE) of 0.008. In addition, the R 2 value was also evaluated for each attribute used as input, with a result of values between 0.590 and 0.845.
A review on internet of things-based stingless bee's honey production with im...IJECEIAES
Honey is produced exclusively by honeybees and stingless bees which both are well adapted to tropical and subtropical regions such as Malaysia. Stingless bees are known for producing small amounts of honey and are known for having a unique flavor profile. Problem identified that many stingless bees collapsed due to weather, temperature and environment. It is critical to understand the relationship between the production of stingless bee honey and environmental conditions to improve honey production. Thus, this paper presents a review on stingless bee's honey production and prediction modeling. About 54 previous research has been analyzed and compared in identifying the research gaps. A framework on modeling the prediction of stingless bee honey is derived. The result presents the comparison and analysis on the internet of things (IoT) monitoring systems, honey production estimation, convolution neural networks (CNNs), and automatic identification methods on bee species. It is identified based on image detection method the top best three efficiency presents CNN is at 98.67%, densely connected convolutional networks with YOLO v3 is 97.7%, and DenseNet201 convolutional networks 99.81%. This study is significant to assist the researcher in developing a model for predicting stingless honey produced by bee's output, which is important for a stable economy and food security.
A trust based secure access control using authentication mechanism for intero...IJECEIAES
The internet of things (IoT) is a revolutionary innovation in many aspects of our society including interactions, financial activity, and global security such as the military and battlefield internet. Due to the limited energy and processing capacity of network devices, security, energy consumption, compatibility, and device heterogeneity are the long-term IoT problems. As a result, energy and security are critical for data transmission across edge and IoT networks. Existing IoT interoperability techniques need more computation time, have unreliable authentication mechanisms that break easily, lose data easily, and have low confidentiality. In this paper, a key agreement protocol-based authentication mechanism for IoT devices is offered as a solution to this issue. This system makes use of information exchange, which must be secured to prevent access by unauthorized users. Using a compact contiki/cooja simulator, the performance and design of the suggested framework are validated. The simulation findings are evaluated based on detection of malicious nodes after 60 minutes of simulation. The suggested trust method, which is based on privacy access control, reduced packet loss ratio to 0.32%, consumed 0.39% power, and had the greatest average residual energy of 0.99 mJoules at 10 nodes.
Fuzzy linear programming with the intuitionistic polygonal fuzzy numbersIJECEIAES
In real world applications, data are subject to ambiguity due to several factors; fuzzy sets and fuzzy numbers propose a great tool to model such ambiguity. In case of hesitation, the complement of a membership value in fuzzy numbers can be different from the non-membership value, in which case we can model using intuitionistic fuzzy numbers as they provide flexibility by defining both a membership and a non-membership functions. In this article, we consider the intuitionistic fuzzy linear programming problem with intuitionistic polygonal fuzzy numbers, which is a generalization of the previous polygonal fuzzy numbers found in the literature. We present a modification of the simplex method that can be used to solve any general intuitionistic fuzzy linear programming problem after approximating the problem by an intuitionistic polygonal fuzzy number with n edges. This method is given in a simple tableau formulation, and then applied on numerical examples for clarity.
The performance of artificial intelligence in prostate magnetic resonance im...IJECEIAES
Prostate cancer is the predominant form of cancer observed in men worldwide. The application of magnetic resonance imaging (MRI) as a guidance tool for conducting biopsies has been established as a reliable and well-established approach in the diagnosis of prostate cancer. The diagnostic performance of MRI-guided prostate cancer diagnosis exhibits significant heterogeneity due to the intricate and multi-step nature of the diagnostic pathway. The development of artificial intelligence (AI) models, specifically through the utilization of machine learning techniques such as deep learning, is assuming an increasingly significant role in the field of radiology. In the realm of prostate MRI, a considerable body of literature has been dedicated to the development of various AI algorithms. These algorithms have been specifically designed for tasks such as prostate segmentation, lesion identification, and classification. The overarching objective of these endeavors is to enhance diagnostic performance and foster greater agreement among different observers within MRI scans for the prostate. This review article aims to provide a concise overview of the application of AI in the field of radiology, with a specific focus on its utilization in prostate MRI.
Seizure stage detection of epileptic seizure using convolutional neural networksIJECEIAES
According to the World Health Organization (WHO), seventy million individuals worldwide suffer from epilepsy, a neurological disorder. While electroencephalography (EEG) is crucial for diagnosing epilepsy and monitoring the brain activity of epilepsy patients, it requires a specialist to examine all EEG recordings to find epileptic behavior. This procedure needs an experienced doctor, and a precise epilepsy diagnosis is crucial for appropriate treatment. To identify epileptic seizures, this study employed a convolutional neural network (CNN) based on raw scalp EEG signals to discriminate between preictal, ictal, postictal, and interictal segments. The possibility of these characteristics is explored by examining how well timedomain signals work in the detection of epileptic signals using intracranial Freiburg Hospital (FH), scalp Children's Hospital Boston-Massachusetts Institute of Technology (CHB-MIT) databases, and Temple University Hospital (TUH) EEG. To test the viability of this approach, two types of experiments were carried out. Firstly, binary class classification (preictal, ictal, postictal each versus interictal) and four-class classification (interictal versus preictal versus ictal versus postictal). The average accuracy for stage detection using CHB-MIT database was 84.4%, while the Freiburg database's time-domain signals had an accuracy of 79.7% and the highest accuracy of 94.02% for classification in the TUH EEG database when comparing interictal stage to preictal stage.
Analysis of driving style using self-organizing maps to analyze driver behaviorIJECEIAES
Modern life is strongly associated with the use of cars, but the increase in acceleration speeds and their maneuverability leads to a dangerous driving style for some drivers. In these conditions, the development of a method that allows you to track the behavior of the driver is relevant. The article provides an overview of existing methods and models for assessing the functioning of motor vehicles and driver behavior. Based on this, a combined algorithm for recognizing driving style is proposed. To do this, a set of input data was formed, including 20 descriptive features: About the environment, the driver's behavior and the characteristics of the functioning of the car, collected using OBD II. The generated data set is sent to the Kohonen network, where clustering is performed according to driving style and degree of danger. Getting the driving characteristics into a particular cluster allows you to switch to the private indicators of an individual driver and considering individual driving characteristics. The application of the method allows you to identify potentially dangerous driving styles that can prevent accidents.
Hyperspectral object classification using hybrid spectral-spatial fusion and ...IJECEIAES
Because of its spectral-spatial and temporal resolution of greater areas, hyperspectral imaging (HSI) has found widespread application in the field of object classification. The HSI is typically used to accurately determine an object's physical characteristics as well as to locate related objects with appropriate spectral fingerprints. As a result, the HSI has been extensively applied to object identification in several fields, including surveillance, agricultural monitoring, environmental research, and precision agriculture. However, because of their enormous size, objects require a lot of time to classify; for this reason, both spectral and spatial feature fusion have been completed. The existing classification strategy leads to increased misclassification, and the feature fusion method is unable to preserve semantic object inherent features; This study addresses the research difficulties by introducing a hybrid spectral-spatial fusion (HSSF) technique to minimize feature size while maintaining object intrinsic qualities; Lastly, a soft-margins kernel is proposed for multi-layer deep support vector machine (MLDSVM) to reduce misclassification. The standard Indian pines dataset is used for the experiment, and the outcome demonstrates that the HSSF-MLDSVM model performs substantially better in terms of accuracy and Kappa coefficient.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
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Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
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maximum of the accelerating field. The constant influence on the particle from the radial component of
electric field which deflects it from the axis is the reason that the external focusing elements, especially in the
beginning of acceleration, have become an integral part of the design of the traveling wave accelerators. This
requires additional energy costs and makes the accelerator design more cumbersome.
A special place among the BRS that are widely used as accelerating systems for the linear electron
accelerators for low energy with a standing wave is occupied by the structure [4], using which it is possible to
achieve a high rate of acceleration. Concerning this structure,there is a pressing issue of providing radial
focusing of the accelerated particles, since the outer diameter of the structure due to lateral connection cells
extending from the four sides of the accelerating cells arranged on one axis is approximately twice the
diameter of the accelerating structures with the axial connection cells, and the use of conventional focusing
devices is therefore associated with a considerable increase in the transverse dimension which is already
large. Moreover, the mass of the accelerator’s transmitter unit increases, and there arises the need to
introduce into the installation the power supplies for the focusing elements.
2. METHODS
2.1 General Statements
BRS in the LEA, working in the standing wave mode, can be considered as a chain of accelerating
cavities, arranged on a single axis and linked by the connection cells [5]. Since the connection cells are free
from electromagnetic fields and not involved in the particle acceleration, they may be placed outside of the
accelerating structure. The oscillations of electromagnetic fields in the adjacent accelerating cavities are
different in phase by ; therefore, the particle must cover the distance between the centers of adjacent
accelerating cavities during the time equal to half the period of electromagnetic oscillations. Only in this way
the synchronization is achieved between the particle and the accelerating field.
If we consider, ata fixed moment of time, the distribution function of the electromagnetic field
intensity along the axis of the LEA with standing wave, then we can see that this function consists of
alternating pulses of different polarity with a spatial period equal to the wavelength of the generator.
Under some well-known conditions [6], this distribution function can be expanded in a Fourier
series, and the standing wave field can be represented by a sum of harmonics. The particle interacts
effectively only with the harmonic, the phase velocity of which equals the velocity of the particle motion.
Consequently, the longitudinal dynamics of the particles in the LEA with standing wave can be studied by
the methods used in the traveling wave accelerators.
When considering the radial motion of the particles,it is necessary to note the fact that the
longitudinal and radial motions are closely connected and their equations must be solved together. In the
LEA with standing wave on the basis of BRS, we can note some specific characteristics in the calculation of
the radial motion of the particles. In the case of the accelerating cavities of complex shape optimized with
respect to shunt resistance, there are no analytical expressions for the components of electromagnetic field.
The distributions of the electromagnetic field components with respect to the longitudinal coordinate and the
radius, obtained with the help of numerical methods, must be given in the form of tables over the entire
aperture of the drift channel. The presence in the accelerating cells of the protruding drift sleeves is the cause
of strong curvature of the field lines of the electric field, which leads to the appearance of the significant in
magnitude transverse electric fieldat the place of the largest curvature. Besides, the drift sleeves shield a
certain part of the drift channel from the electromagnetic field, resulting in the appearance in the accelerating
structure of the periodically repeated segments free from electromagnetic field.
2.2 Dynamics of the Particles
The most promising in the LEA with standing wave is the implementation of focusing, for which the
focusing action of the electromagnetic field itself is used for guiding the beam [7]. As mentioned above, it
becomes possible due to the appearance in the BRS cells of the radial component of electric field. Using the
focusing properties of the ownhigh-frequency (HF) field of the BRS significantly reduces the transversal
sizes of the accelerating section and lightens the construction of the accelerator as a whole. Furthermore,
there is no longer the need for cumbersome power sources for the external focusing devices creating
additional difficulties in the use of accelerators, which is particularly important when used in geology,
medicine and defectoscopy.
The dynamics of the beam in the linear accelerator is determined by the movement of each particle
contained in the beam under the action of electric and magnetic fields. If we assume that the particle charge is
pointlike and its own magnetic moment is absent [8], then the equation of motion of the individual particle is
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described by the following expression
( ) [ ] (1)
where is time, and are the charge and mass of the particle, is the velocity of the particle, is the
magnetic constant, and are high-frequency electromagnetic, static electrical or magnetic focusing fields,
or the fields created by other beam particles.
Because ultimately we are interested in the trajectory of the beam particles in the accelerator, the
equation (1) should be converted to a form convenient for the study of the particle dynamics, that is, we
should express the acceleration of the particle through its speed and the intensity of the electric and magnetic
fields. Since the velocities of the particles in the accelerator are close to the speed of light, then, using the
well-known formulas of relativistic mechanics [9], we can get
√ { [ ] ( )} (2)
In general, the vectors and depend on the coordinates and time; in the particular case, when the
time dependence is absent (the case of the static electric and magnetic fields), the formula retains its form.
Let us project the resulting vector equation (2) on the coordinate axes. In our case, the most
convenient is to use a cylindrical coordinate system ( ), since the drift channel and the electromagnetic
field for the lowesttype of oscillations have axial symmetry. Let us move to the dimensionless
coordinates , , the dimensionless time , the relative velocities with respect to coordinates
, and the dimensionless components of the electrical and magnetic fields, which can
be easily reduced to a dimensionless form using the expressions:
( ) ( )
( ) ( )
where is the wavelength of the generator,
As a result, the equation of motion of the charged particle can be represented by a system of
equations in dimensionless quantities
{ ( ) ( ) ( ) ( ) ( ) [ ( ) ( ) ( ) ( )]}
{ ( ) ( ) ( ) ( ) ( ) [ ( ) ( ) ( ) ( )]}
( )
{ ( ) ( ) [ ( ) ( ) ( ) ( )]}
In the latter system of equations,
√
is the energy of the particle in the units of the rest energy.
The resulting system of equations (3) has been taken as the basis for the study of the motion of
particles in the accelerators with standing wave. Due to the fact that it is impossible to present analytically the
electromagnetic field in the accelerating cavity of a complex shape, the corresponding components of the
field, included in the right-hand side, should be given as a table. The external magnetic field can be of any
type and is also given by a table.
3. DISCUSSION AND RESULTS
Let us analyze the effect of high frequency (HF) focusing, which in the considered case has a
number of features. To obtain a clear physical picture, we use a simplified mathematical model of
accelerating cells proposed in [10], with the only difference that its longitudinal dimension will be two times
less. After calculations, we conclude that when the accelerating field varies with time according to the cosine
law, then, in this case, all the regions of the initial phases of the electron flying in, for which there are
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realized the conditions of accelerating and focusingby the corresponding components of the HF field, will be
shifted by ⁄ as compared to the analogous regions for the traditional BRS.
Therefore, in the design of the accelerating cells with the drift sleeves or without them in the form of
conventional cylindrical accelerating cavities, the phase regions of simultaneous acceleration and stable
radial motion for the first type of cells will be
and for the cells of the second type
where It may be noted that the extent of the phase regions is, as before, .
In the paper, we consider the design and study the characteristics of a modified accelerating
structure of this type with the improved focusing properties. This is achieved by the design of the
accelerating cells with one drift sleeve and the drift opening of conical shape, which changes the spatial
configuration of the HF fields in the system and results in a change of boundaries of the corresponding phase
regions of acceleration and focusing. Amodified BRS is shown in Figure 1.
Figure1. Modified BRS with a high acceleration rate.
In our case, without a serious damage to the final result, we can neglect the change in the shape of
the distribution of the azimuthal magnetic and longitudinal electric fields, taking into account only a
significant change in the radial component of the electric field. Then for the electron beam entering the
accelerating cellfrom the direction of the drift sleeve, the region of focusingby the radial electric field will
coincide with the corresponding region of the traditional BRS, whereas the region of the simultaneous
acceleration and focusing will be
Moreover, the focusing zones due to the use of the radial component of electric field and the azimuthal
component of magnetic field overlap in the range
Thus, we achieve a 50% increase for the sizes of the region of the initial phases of the electron
flying in, for which the conditions of simultaneous acceleration and focusing are fulfilled, and, besides,the
phase corresponding to the maximum acceleration ( ⁄ ) falls within the focusing region. This makes it
possible to implement the mode which providesboth the radial focusing of the electron bunches and their
optimal acceleration. Such favorable in all respects mode of the installation is unattainable while using BRS
with the conventional accelerating cells.
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More complete information on the focusing properties of both high frequency structures could be
obtained by the software for integrating the motion equations of charged particles in the structures working in
the standing wave mode. The HF fields interacting with the electrons along the entire length of the
accelerator were given in tables. We investigated an accelerating system containing 16 identical accelerating
cells, the longitudinal dimension of which corresponded to the relative phase velocity equal to 1, while the
intensity of the longitudinal electric field on the axis of the accelerating cells was . The phases
were measured in the scale where 1 corresponded to . The particles fell into a structure with the initial
radius of , with the longitudinal relative velocity and the relative radial velocity .
The calculation results indicate that the focusing effect on the accelerated electrons of the modified
HF structure is much more significant. Using the concept of acceptance, we have succeeded in carrying out a
correct comparison of the focusing properties of the conventional BRS of the considered type and the BRS
with a modified profile of accelerating cells.
The acceptance is the maximal possible emittance of the coherent beam that is able to pass through
the system. The higher the acceptance, the higher is the carrying capacity of the HF structure. Figure 2
presents the acceptances for various initial phases of the electron flying into the considered systems, where
both systems have the same apertures of .
Figure 2. Acceptances for various initial phases of the electrons flying into the accelerating systems: a–the
phase 0.7, b–the phase 0.8, c–the phase 0.9; the dashed linere presents the acceptances of the conventional
BRS, the continuous line,the acceptances of the modified BRS.
As seen from Figure 2, the described change of the form of accelerating cells allows increasing by
two times and more the phase area bounded by the acceptances for the entire phase range corresponding to
the maximum gain by the particles of the output energy (the phases 0.7-0.9).
The main advantage of the standing-wave LEA with BRS is the possibility of a significant reduction
in the length of the accelerating structure to yield the necessary gaining of energy under the same power of
the HF generator. Obviously, such a structure should have, first of all, a large value of effective shunt
resistance. Among other electrodynamic characteristics of BRS, the connection coefficient between cells, the
quality factor, the group velocity, the maximum values of the electric and magnetic fields on the surface of
the structure, the electric field overvoltage factor are important.
Accelerators with a large connection coefficient have better stability to changes in the parameters of
the accelerated beam, less rigid tolerances for manufacturing the accelerating structure, better stability of
operation of the HF generator. In [11], there are presented the results of studies on optimizing the geometry
of BRS with internal connection cells with respect to increasing the coupling coefficient to 15% under an
insignificant change in the line effective shunt resistance and other electrodynamic characteristics. The results
indicate the promising character of the research in this direction [12-14].
Thus, the proposed modification of the shape of the BRS accelerating cells has a number of
indisputable advantages and allows significantly increasing the efficiency of the system in such promising
mode as focusing of the accelerated be amby the own HF fieldsof the accelerating structure.
4. CONCLUSION
In conclusion, we would like to mention the fact that the calculation results have fully confirmed the
conclusions obtained using a simplified mathematical model of the accelerating cell and provide a clear
picture of the processes. Therefore, in the future the authors plan to use it for the continuous determination of
the focusing properties of various HF structures working in the standing wave mode.
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The proposed method of guiding the electron beam in linear accelerators is based on using the
focusing properties of the radial component of the electric field. This component appears even for the lowest
type of oscillation in the conventional cylindrical accelerating cavities in the region of the drift tubes and,
therefore, in the vicinity of the drift channel axis. This effect, arising due to the curvature of the
electromagnetic field lines, might be promising also for the proton and ion linear accelerators.
The studies conducted with the help of mathematical modeling have shown the promising nature of
this method in the design and construction of the LEA without the use of external focusing devices. This will
allow greatly reducing the dimensions and weight of the accelerator itself and enhancing its effectiveness
while using in the technological fields of industry and medicine.
Inthe future, we plan to study the impact of changes in the shape the BRS accelerating cavities on
the distribution of the electromagnetic field components in the region of drift channel and on the conditions
of effective acceleration and radial stability.
ACKNOWLEDGEMENTS
This work was supported by MEPhI Academic Excellence Project (contract No. 02.a03.21.0005,
27.08.2013).
REFERENCES
[1] K. Belovintzev, et al., “Izluchatel'nyy kompleks dlya fundamental'nykh i prikladnykh issledovaniy,” [Radiation
Complex for Fundamental and Applied Research]. In Trudy 14 soveshchaniya po uskoritelyam zaryazhennykh
chastits, Protvino [14th conference on charged particles' accelerators, Protvino], Vol. 4, pp. 264-268, 1994.
[2] A.N. Filatov & V.K. Shilov, “Control of radio-frequency characteristics of linear electron accelerator”. Instruments
and Experimental Techniques New York, 28(6 pt 1), 1258-1261, 1985.
[3] A.E.Novozhilov, et al., “Calculation of Resonant Frequencies and Electromagnetic Fields in Resonators of Linear
Accelerators for Commercial Application, Medicine and Environmental Protection,”Research Journal of
Pharmaceutical, Biological and Chemical Sciences, 7(2), 897-905, 2016.
[4] V.A. Vaguine, “Standing Wave High Gradient Accelerator Structure”, IEEE Transactions on Nuclear Science,
24(3), 1084-1086, 1977.
[5] A.E. Novozhilov, et al., “Distribution of Accelerating Voltage in Resonator of Linear Electron-Positron Collider”,
International Journal of Applied Engineering Research, 11(3), 1596-1602, 2016.
[6] M. Vygodskiy, “Spravochnik po vysshey matematike” [Handbook on Higher Mathematics]. Moscow: AST, Astrel',
2006.
[7] Ya. Fainberg, “O vozmozhnosti odnovremennoy radial'noy i fazovoy ustoychivosti v lineynykh uskoritelyakh bez
spetsial'nykh fokusiruyushchikh ustroystv,” [On thePossibility of Simultaneous Radial andPhase Stability in Linear
Accelerators without Special Focusing Devices].In Teoriya i raschet lineynykh uskoriteley [Theory and calculation
of linear accelerators].Moscow: Gosatomizdat, 1962.
[8] A.E. Novozhilov, et al., “Problems of measurement of high-frequency fields in linear electron accelerators”, Global
Journal of Pure and Applied Mathematics, 12(1), 643-655, 2016.
[9] L. Landau & E. Lifshitz, “Teoreticheskaya fizika: Tom 2. Teoriya polya” [Theoretical Physics: Vol. 2. Field
Theory]. Moscow: Science. 1988.
[10] A.N. Filatov & V.K. Shilov, “RF Focusing in the Standing-Wave Electron Linacs”, Soviet physics. Technical
physics, 29(2), 163-167, 1984.
[11] E.A. Savin, N.P. Sobenin, “Biperiodic accelerating structure with internal connection cells with an increased
connection coefficient”, Journal of Technical Physics, 83(5), 141-146, 2013.
[12] N.N.N.A. Malik, M. Esa, S.K.S. Yusof, N.M.A. Latiff “Intelligent Linear Collaborative Beamforming for Multi-
objective Radiation Beampattern in Wireless Sensor Networks” TELKOMNIKA Indonesian Journal of Electrical
Engineering, 12(10), 7318-7329, 2014.
[13] Suliman Abdel Rahman Abdalla “A Real-Time Implementation of Moving Object Action Recognition System
Based on Motion Analysis” Indonesian Journal of Electrical Engineering and Informatics, 5(10), 2017.
[14] Sobhan Dorahaki, “Evaluating the Radiation and Temperature Effect on Photovoltaic Systems”, Bulletin of
Electrical Engineering and Informatics, 4(1), 1-6, 2015.
7. IJECE ISSN: 2088-8708
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747
BIOGRAPHIES OF AUTHORS
A.N. Filatov & V.K. Shilov, “RF Focusing in the Standing-Wave Electron Linacs,” Soviet
physics. Technical physics,29(2), 163-167, 1984
A.N. Filatov & V.K. Shilov, CONTROL OF RADIO-FREQUENCY CHARACTERISTICS OF
LINEAR ELECTRON ACCELERATOR. Instruments and experimental techniques New York,
Volume 28, Issue 6 pt 1, November 1985, Pages 1258-1261
Problems of Beam Focusing by Electromagnetic Field in Linear Electron Accelerator with
Standing Wave, Based on Biperiodic Structure Novozhilov A.E., Filatov A.N., Shilov
V.K.Modern Applied Science; Vol. 9, No. 4; 2015: 160-169 ISSN 1913-1844 E-ISSN 1913-
1852 Pub-lished by Canadian Center of Science and Education DOI:10.5539/mas.v9n4p160
Linear Electron Accelerators Aimed at Environmental Protection Novozhilov A.E., Filatov A.N.,
Shilov V.K. Biosciences Biotechnology Research Asia, September 2015. Vol. 12(Spl. Edn. 2), p.
261-268 DOI: http://dx.doi.org/10.13050/bbra/2199
Compact Accelerating System for a Multichannel Electron Linear Accelerator Novozhilov A.E.,
Filatov A.N., Shilov V.K. Research Journal of Pharmaceutical, Biological and Chemical
Sciences (ISSN09758585-India-Scopus) July – August 2016 RJPBCS 7(5) Page No. 939-944
A.N. Filatov & V.K. Shilov, “RF Focusing in the Standing-Wave Electron Linacs,” Soviet
physics. Technical physics,29(2), 163-167, 1984
A.N. Filatov & V.K. Shilov, CONTROL OF RADIO-FREQUENCY CHARACTERISTICS OF
LINEAR ELECTRON ACCELERATOR. Instruments and experimental techniques New York,
Volume 28, Issue 6 pt 1, November 1985, Pages 1258-1261
Problems of Beam Focusing by Electromagnetic Field in Linear Electron Accelerator with
Standing Wave, Based on Biperiodic Structure Novozhilov A.E., Filatov A.N., Shilov
V.K.Modern Applied Science; Vol. 9, No. 4; 2015: 160-169 ISSN 1913-1844 E-ISSN 1913-
1852 Pub-lished by Canadian Center of Science and Education DOI:10.5539/mas.v9n4p160
Linear Electron Accelerators Aimed at Environmental Protection Novozhilov A.E., Filatov A.N.,
Shilov V.K. Biosciences Biotechnology Research Asia, September 2015. Vol. 12(Spl. Edn. 2), p.
261-268 DOI: http://dx.doi.org/10.13050/bbra/2199
Compact Accelerating System for a Multichannel Electron Linear Accelerator Novozhilov A.E.,
Filatov A.N., Shilov V.K. Research Journal of Pharmaceutical, Biological and Chemical
Sciences (ISSN09758585-India-Scopus) July – August 2016 RJPBCS 7(5) Page No. 939-944
Problems of Beam Focusing by Electromagnetic Field in Linear Electron Accelerator with
Standing Wave, Based on Biperiodic Structure Novozhilov A.E., Filatov A.N., Shilov
V.K.Modern Applied Science; Vol. 9, No. 4; 2015: 160-169 ISSN 1913-1844 E-ISSN 1913-
1852 Published by Canadian Center of Science and Education DOI:10.5539/mas.v9n4p160
Linear Electron Accelerators Aimed at Environmental Protection Novozhilov A.E., Filatov A.N.,
Shilov V.K. Biosciences Biotechnology Research Asia, September 2015. Vol. 12(Spl. Edn. 2), p.
261-268 DOI: http://dx.doi.org/10.13050/bbra/2199
Compact Accelerating System for a Multichannel Electron Linear Accelerator Novozhilov A.E.,
Filatov A.N., Shilov V.K. Research Journal of Pharmaceutical, Biological and Chemical
Sciences (ISSN09758585-India-Scopus) July – August 2016 RJPBCS 7(5) Page No. 939-944
Closed Magnetic Trap for Confining and Heating Plasma Novozhilov A.E., Filatov A.N., Shilov
V.K.Biosciences Biotechnology Research Asia, April 2015, Vol. 12(1), 647-651
DOI: http://dx.doi.org/10.13005/bbra/1708
Calculation of Resonant Frequencies and Electromagnetic Fields in Resonators of Linear Ac-
celerators for Commercial Application, Medicine and Environmental Protection Novozhilov
A.E., Filatov A.N., Shilov V.K. Research Journal of Pharmaceutical, Biological and Chemical
Sciences March – April 2016 RJPBCS 7(2), pp 897-905