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Medidas de dispersion - Liliana Egañe
MEDIDAS DE DISPERSIÓN: CONCEPTO. CARACTERÍSTICAS Y USOS. RANGO. DESVIACIONES TÍPICAS. VARIANZA Y COEFICIENTE DE VARIACIÓN. CONCEPTO. CARACTERÍSTICAS Y UTILIDAD ESTADÍSTICA.
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I would never have dreamed of a way that my artwork from the past would today give me the opportunity to earn a passive income working from home while doing what I love to do, being creative. My following slides are about other Print-on-demand shops.
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1) The document discusses simulation of spark ignition (SI) and compression ignition (CI) internal combustion engines, with a focus on spray models for CI engines.
2) For SI engine simulation, models of carbureted and port fuel injected engines are presented and key parameters such as power, efficiency and emissions are reported.
3) For CI engine simulation, the impact of design factors like number/angle of injectors, bowl geometry, and injection timing are examined through three cases modeled. Visualizations of fuel spray for each case are provided.
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The document experimentally investigates the performance, emissions, and combustion of a diesel engine operating in CNG-diesel dual fuel mode with varying CNG injection rates and operating pressures. Tests were conducted at 6 LPM and 13.5 LPM of CNG injected at diesel injection pressures of 200, 220, and 240 bar. Results show brake thermal efficiency increased with higher pressure but decreased with more CNG, while emissions varied with both factors. CO2 and NOx increased at 220 bar then decreased at 240 bar for all fuels, while CO and UHC decreased with higher pressure and more CNG substitution. Peak heat release rate was highest for pure diesel at 240 bar due to better atomization.
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This document summarizes a laboratory study on treating and reusing greywater. The study involved collecting greywater from bathroom sinks and washing areas of an apartment building. The greywater was treated using a system with sedimentation, sand filtration, and storage tanks. Water quality parameters like pH, turbidity, COD, DO were tested on the raw and treated greywater. Results showed the treated greywater met standards for reuse for gardening, toilet flushing and street washing after reductions in turbidity, COD and other parameters. The study concluded greywater treatment and reuse is an effective small-scale method to reduce water usage and demands on municipal supplies.
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Recommended
Medidas de dispersion - Liliana Egañe
MEDIDAS DE DISPERSIÓN: CONCEPTO. CARACTERÍSTICAS Y USOS. RANGO. DESVIACIONES TÍPICAS. VARIANZA Y COEFICIENTE DE VARIACIÓN. CONCEPTO. CARACTERÍSTICAS Y UTILIDAD ESTADÍSTICA.
#3 d textured designs
I would never have dreamed of a way that my artwork from the past would today give me the opportunity to earn a passive income working from home while doing what I love to do, being creative. My following slides are about other Print-on-demand shops.
C012331527
1) The document discusses simulation of spark ignition (SI) and compression ignition (CI) internal combustion engines, with a focus on spray models for CI engines.
2) For SI engine simulation, models of carbureted and port fuel injected engines are presented and key parameters such as power, efficiency and emissions are reported.
3) For CI engine simulation, the impact of design factors like number/angle of injectors, bowl geometry, and injection timing are examined through three cases modeled. Visualizations of fuel spray for each case are provided.
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The document experimentally investigates the performance, emissions, and combustion of a diesel engine operating in CNG-diesel dual fuel mode with varying CNG injection rates and operating pressures. Tests were conducted at 6 LPM and 13.5 LPM of CNG injected at diesel injection pressures of 200, 220, and 240 bar. Results show brake thermal efficiency increased with higher pressure but decreased with more CNG, while emissions varied with both factors. CO2 and NOx increased at 220 bar then decreased at 240 bar for all fuels, while CO and UHC decreased with higher pressure and more CNG substitution. Peak heat release rate was highest for pure diesel at 240 bar due to better atomization.
H012314047
This document summarizes a laboratory study on treating and reusing greywater. The study involved collecting greywater from bathroom sinks and washing areas of an apartment building. The greywater was treated using a system with sedimentation, sand filtration, and storage tanks. Water quality parameters like pH, turbidity, COD, DO were tested on the raw and treated greywater. Results showed the treated greywater met standards for reuse for gardening, toilet flushing and street washing after reductions in turbidity, COD and other parameters. The study concluded greywater treatment and reuse is an effective small-scale method to reduce water usage and demands on municipal supplies.
B012410616
This document summarizes a numerical study on the effect of discharge coefficient on the performance of a six jet Pelton turbine model. Computational fluid dynamics (CFD) was used to analyze the turbine's performance at design and off-design discharge conditions. The CFD results for efficiency were compared to available model test data and found to be in close agreement. Pressure distribution, water velocity, and water distribution within the turbine were also obtained from the CFD simulations and discussed. The study aims to provide a cost-effective tool for detailed flow analysis and performance evaluation of Pelton turbines at different operating conditions.
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This document provides a review of using ground granulated blast furnace slag (GGBS) in concrete as a partial replacement for cement. GGBS is a byproduct of steel production that can be ground into a fine powder and used similarly to cement. The document discusses the chemical composition of GGBS and its hydration process. It notes that GGBS concrete typically has improved workability, lower heat of hydration which reduces cracking, and increased chemical resistance and durability. The document concludes that GGBS is commonly used at 20-50% replacement of cement to balance properties like strength development and permeability.
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This document summarizes a study on construction sequence delays for road infrastructure projects. It begins with an abstract that outlines the objectives of studying delay causes and factors that contribute to construction sequence delays for road projects. It then reviews literature on previous studies related to construction delays, earned value management, and delay analysis methods. The document describes the methodology used, which was a questionnaire survey to identify and rank significant delay causes. It presents the results of the survey, identifying the top 10 delay causes. It then describes a case study analysis of a road project in India using earned value management to validate the questionnaire findings. The key delays identified for the case study project were related to land acquisition, environmental issues, and coordination challenges.
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This document compares the accuracy of determining volumes using close range photogrammetry versus traditional methods. It presents a case study where the volume of a test field was calculated using both approaches. Using traditional methods with 425 control points, the volume was calculated as 221475.14 m3 using trapezoidal rules, 221424.52 m3 using Simpson's rule, and 221484.05 m3 using Simpson's 3/8 rule. Using close range photogrammetry with 42 control points and 574 generated points, the volume was calculated as 215310.60 m3 using trapezoidal rules, 215300.43 m3 using Simpson's rule, and 215304.12 m3 using Simpson's 3
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This document discusses a study on the effect of liquid additives on the strength and behavior of reinforced concrete model beams. Six model beams were tested with different proportions of high-range water reducing admixtures by weight of cement ranging from 0% to 2%. Compressive strength, modulus of elasticity, shear modulus, modulus of volume change, Poisson's ratio, deflection, and cracking were measured and calculated at 28 days. The best results were achieved using an admixture ratio of 1.6%, which improved compressive strength and modulus of elasticity but had no effect on cracking behavior. Control cube specimens were also tested to determine compressive strength at 7 and 28 days. The experimental results are presented in tables.
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This document describes the design and analysis of an automatic stirrup making machine. Some key points:
1. The machine aims to automate the production of stirrups used in concrete beams and columns to reduce human labor and increase productivity.
2. It consists of components like a rectifier, motor, sprockets, and dies that rotate to bend rebar into the square shape of the stirrup.
3. Design calculations are shown for selecting transmission components like sprockets and chain to achieve the desired bending speed from the motor torque.
4. The machine is designed to continuously produce 200x200mm stirrups from 6-8mm rebar with low power consumption for use in construction sites
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This document presents the results of a pushover analysis conducted on 9 structural models with varying plan irregularities. The models were analyzed using ETABS software to determine key parameters such as lateral displacement, story drift, base shear, and performance point. The results show that structures with complex geometries experience greater lateral displacement, story drift, and base shear compared to regular structures. Pushover curves indicate that irregular structures may not achieve desired performance levels at lower displacement thresholds. In conclusion, simple and regular building geometries perform better during earthquakes by attracting fewer seismic forces.
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This document characterizes and analyzes the use of rice husk ash as a pozzolanic material in concrete as a partial replacement for cement. Researchers conducted experiments replacing cement with rice husk ash at rates from 0-40% in concrete mixes. The rice husk ash was collected from rice mills in Lucknow, India and tested for its pozzolanic properties. Test results showed that compressive strengths were maintained with replacements of up to 10-15% rice husk ash and that rice husk ash can be considered an effective pozzolan. The study concluded that rice husk ash has potential as a supplementary cementitious material to reduce the cost of concrete while providing adequate strength and durability.
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This document presents an experimental study analyzing various machining processes and nickel coating on mild steel. Turning, cylindrical grinding, and nickel coating were performed on mild steel rods. Surface roughness, hardness, microstructure, and corrosion resistance via salt spray testing were evaluated. Turning and grinding were found to produce surface roughness values of 1.6 μm and 0.2 μm respectively. Nickel coating improved surface roughness to 0.05 μm and increased hardness and corrosion resistance. Microstructural analysis found the ground mild steel to consist of 60% ferrite and 40% pearlite grains. The study aims to evaluate these surface finishing processes and analyze the effects of parameters on surface quality.
J012265658
This document investigates replacing coarse aggregates with waste tire pieces for use in road construction. Tests were conducted on coarse aggregates with 0%, 5%, 10%, and 15% replacement by volume with tire pieces to evaluate the impact on physical properties. The results showed that:
1) Crushing value, abrasion value, and impact value all decreased with higher tire piece replacement levels, indicating improved durability.
2) Water absorption increased slightly with replacement above 10%.
3) Specific gravity decreased with replacement, ranging from 2.83 for 0% to 2.24 for 10% replacement.
4) Up to 15% replacement improved physical properties without compromising strength, suggesting waste tires can effectively replace some coarse aggregates for road
H012335156
This document summarizes an experimental study on the behavior of concrete with partial replacements of fine aggregate with copper slag and cement with ground granulated blast furnace slag (GGBS). Concrete cubes, cylinders, and prisms were produced with 0-40% fine aggregate replaced by copper slag and 0-20% cement replaced by GGBS. The specimens were tested after 7, 14, and 28 days to determine their compressive, split tensile, and flexural strengths. The results showed that concrete strength generally increased up to 40% fine aggregate replacement by copper slag and 15% cement replacement by GGBS compared to conventional concrete. This study aims to reduce construction costs while promoting sustainable use of industrial byproducts.
K012247277
This study optimized the specific fuel consumption of a single cylinder diesel engine operating on blends of palm seed oil and diesel fuel. The parameters investigated were injection pressure, engine load, and blend ratio. A Taguchi experimental design with 16 runs was used to evaluate these parameters at different levels. Response curve analysis identified that an injection pressure of 200 bar, an engine load of 10 kg, and a blend ratio of B0D100 (100% diesel) produced the lowest specific fuel consumption of 0.28. The engine load had the greatest influence on specific fuel consumption, followed by injection pressure, with blend ratio having the smallest effect. The Taguchi method was able to optimize the engine parameters to minimize specific fuel consumption in fewer experimental trials
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This document reviews 10 research papers on alternative refrigerants to replace chlorofluorocarbons and hydrochlorofluorocarbons. The key points summarized are:
1) Various studies tested propane, propane/butane mixtures, and hydrofluorocarbon/hydrocarbon mixtures as potential refrigerants and found they provided performance similar to or better than CFC-12 in terms of coefficient of performance and cooling capacity.
2) Simulation and experimental studies identified propane/butane mixtures with 60% propane as the best drop-in replacement for R-134a, with higher performance under normal and tropical conditions.
3) Retrofitting domestic refrigerators with a hydrocarbon mixture of R-290 and
Projeto sie emef mauricio cardoso
Inicialmente os alunos trabalharão na digitação de textos prontos (recortes de livros, revistas e jornais) entregues pela professora para a realização deste trabalho. O objetivo inicial é que os mesmos saibam identificar/encontrar e utilizar os sinais de pontuação e os principais caracteres.
I012255862
This document describes a Matlab program developed for soil classification according to the AASHTO soil classification system. The program classifies soil samples based on inputted liquid limit, plasticity index, and percentage passing the #200 sieve values. It outputs the AASHTO soil type classification as well as additional information like group index and general subgrade rating. The program was tested on sample soils from textbooks and correctly classified them. It provides an easier way to classify soils than manually using charts. The program aims to reduce errors, save time, and provide a user-friendly soil classification tool for engineers.
I012274853
This document summarizes a study that tested reinforced concrete beam-column connections under cyclic loading to evaluate their seismic performance. A 1/3 scale beam-column specimen was designed and constructed based on analysis of a 4-story building frame. The specimen was tested under reversed cyclic loading with increasing displacements up to failure while monitoring response through instruments. Cracks initially formed in flexure and progressed to shear cracks. Analysis of load-displacement hysteresis loops provided information on ductility, energy dissipation, strength degradation, and stiffness degradation to evaluate the seismic performance of the connection.
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This document provides a review of using ground granulated blast furnace slag (GGBS) in concrete as a partial replacement for cement. GGBS is a byproduct of steel production that can be ground into a fine powder and used similarly to cement. The document discusses the chemical composition of GGBS and its hydration process. It notes that GGBS concrete typically has improved workability, lower heat of hydration which reduces cracking, and increased chemical resistance and durability. The document concludes that GGBS is commonly used at 20-50% replacement of cement to balance properties like strength development and permeability.
D012261521
This document summarizes a study on construction sequence delays for road infrastructure projects. It begins with an abstract that outlines the objectives of studying delay causes and factors that contribute to construction sequence delays for road projects. It then reviews literature on previous studies related to construction delays, earned value management, and delay analysis methods. The document describes the methodology used, which was a questionnaire survey to identify and rank significant delay causes. It presents the results of the survey, identifying the top 10 delay causes. It then describes a case study analysis of a road project in India using earned value management to validate the questionnaire findings. The key delays identified for the case study project were related to land acquisition, environmental issues, and coordination challenges.
C012271015
This document compares the accuracy of determining volumes using close range photogrammetry versus traditional methods. It presents a case study where the volume of a test field was calculated using both approaches. Using traditional methods with 425 control points, the volume was calculated as 221475.14 m3 using trapezoidal rules, 221424.52 m3 using Simpson's rule, and 221484.05 m3 using Simpson's 3/8 rule. Using close range photogrammetry with 42 control points and 574 generated points, the volume was calculated as 215310.60 m3 using trapezoidal rules, 215300.43 m3 using Simpson's rule, and 215304.12 m3 using Simpson's 3
P01245127138
This document discusses a study on the effect of liquid additives on the strength and behavior of reinforced concrete model beams. Six model beams were tested with different proportions of high-range water reducing admixtures by weight of cement ranging from 0% to 2%. Compressive strength, modulus of elasticity, shear modulus, modulus of volume change, Poisson's ratio, deflection, and cracking were measured and calculated at 28 days. The best results were achieved using an admixture ratio of 1.6%, which improved compressive strength and modulus of elasticity but had no effect on cracking behavior. Control cube specimens were also tested to determine compressive strength at 7 and 28 days. The experimental results are presented in tables.
B012460814
This document describes the design and analysis of an automatic stirrup making machine. Some key points:
1. The machine aims to automate the production of stirrups used in concrete beams and columns to reduce human labor and increase productivity.
2. It consists of components like a rectifier, motor, sprockets, and dies that rotate to bend rebar into the square shape of the stirrup.
3. Design calculations are shown for selecting transmission components like sprockets and chain to achieve the desired bending speed from the motor torque.
4. The machine is designed to continuously produce 200x200mm stirrups from 6-8mm rebar with low power consumption for use in construction sites
E012474655
This document presents the results of a pushover analysis conducted on 9 structural models with varying plan irregularities. The models were analyzed using ETABS software to determine key parameters such as lateral displacement, story drift, base shear, and performance point. The results show that structures with complex geometries experience greater lateral displacement, story drift, and base shear compared to regular structures. Pushover curves indicate that irregular structures may not achieve desired performance levels at lower displacement thresholds. In conclusion, simple and regular building geometries perform better during earthquakes by attracting fewer seismic forces.
D012332832
This document characterizes and analyzes the use of rice husk ash as a pozzolanic material in concrete as a partial replacement for cement. Researchers conducted experiments replacing cement with rice husk ash at rates from 0-40% in concrete mixes. The rice husk ash was collected from rice mills in Lucknow, India and tested for its pozzolanic properties. Test results showed that compressive strengths were maintained with replacements of up to 10-15% rice husk ash and that rice husk ash can be considered an effective pozzolan. The study concluded that rice husk ash has potential as a supplementary cementitious material to reduce the cost of concrete while providing adequate strength and durability.
F012423543
The document reviews the analysis and optimization of cylindrical grinding process parameters on the material removal rate of EN15AM steel. It discusses how grinding wheel speed, workpiece speed, feed rate, depth of cut, and cutting fluid impact the material removal rate. The optimized parameters identified were a grinding wheel speed of 1800 rpm, workpiece speed of 155 rpm, feed rate of 275 mm/min, and depth of cut of 0.04 mm.
I012326065
This document summarizes a study on optimizing and reducing the weight of a universal joint yoke through the use of composite materials. The study first analyzes a conventional universal joint yoke made of SM45C steel using finite element analysis. It then models modified universal joint yokes made of carbon/epoxy composite and Kevlar/epoxy composite. Calculations of torsional strength, buckling strength, and bending natural frequency show that both composite designs meet requirements while reducing weight compared to steel. Static stress analyses and modal analyses using FEA are presented and compared between materials. The study aims to improve mechanical properties and reduce weight of universal joints through composite material optimization.
A012320115
The document discusses the optimization of a flywheel for a multi-cylinder petrol engine. It begins with an introduction to internal combustion engines and flywheels. It then discusses designing a flywheel using empirical formulas to calculate forces and drafting a 2D model. A 3D parametric model is created in Pro/Engineer and forces are analyzed in ANSYS for two materials, cast iron and aluminum alloy. The goal is to validate the flywheel strength under applied forces and compare results between materials.
B012321623
This document presents an experimental study analyzing various machining processes and nickel coating on mild steel. Turning, cylindrical grinding, and nickel coating were performed on mild steel rods. Surface roughness, hardness, microstructure, and corrosion resistance via salt spray testing were evaluated. Turning and grinding were found to produce surface roughness values of 1.6 μm and 0.2 μm respectively. Nickel coating improved surface roughness to 0.05 μm and increased hardness and corrosion resistance. Microstructural analysis found the ground mild steel to consist of 60% ferrite and 40% pearlite grains. The study aims to evaluate these surface finishing processes and analyze the effects of parameters on surface quality.
J012265658
This document investigates replacing coarse aggregates with waste tire pieces for use in road construction. Tests were conducted on coarse aggregates with 0%, 5%, 10%, and 15% replacement by volume with tire pieces to evaluate the impact on physical properties. The results showed that:
1) Crushing value, abrasion value, and impact value all decreased with higher tire piece replacement levels, indicating improved durability.
2) Water absorption increased slightly with replacement above 10%.
3) Specific gravity decreased with replacement, ranging from 2.83 for 0% to 2.24 for 10% replacement.
4) Up to 15% replacement improved physical properties without compromising strength, suggesting waste tires can effectively replace some coarse aggregates for road
H012335156
This document summarizes an experimental study on the behavior of concrete with partial replacements of fine aggregate with copper slag and cement with ground granulated blast furnace slag (GGBS). Concrete cubes, cylinders, and prisms were produced with 0-40% fine aggregate replaced by copper slag and 0-20% cement replaced by GGBS. The specimens were tested after 7, 14, and 28 days to determine their compressive, split tensile, and flexural strengths. The results showed that concrete strength generally increased up to 40% fine aggregate replacement by copper slag and 15% cement replacement by GGBS compared to conventional concrete. This study aims to reduce construction costs while promoting sustainable use of industrial byproducts.
K012247277
This study optimized the specific fuel consumption of a single cylinder diesel engine operating on blends of palm seed oil and diesel fuel. The parameters investigated were injection pressure, engine load, and blend ratio. A Taguchi experimental design with 16 runs was used to evaluate these parameters at different levels. Response curve analysis identified that an injection pressure of 200 bar, an engine load of 10 kg, and a blend ratio of B0D100 (100% diesel) produced the lowest specific fuel consumption of 0.28. The engine load had the greatest influence on specific fuel consumption, followed by injection pressure, with blend ratio having the smallest effect. The Taguchi method was able to optimize the engine parameters to minimize specific fuel consumption in fewer experimental trials
B012250811
This document reviews 10 research papers on alternative refrigerants to replace chlorofluorocarbons and hydrochlorofluorocarbons. The key points summarized are:
1) Various studies tested propane, propane/butane mixtures, and hydrofluorocarbon/hydrocarbon mixtures as potential refrigerants and found they provided performance similar to or better than CFC-12 in terms of coefficient of performance and cooling capacity.
2) Simulation and experimental studies identified propane/butane mixtures with 60% propane as the best drop-in replacement for R-134a, with higher performance under normal and tropical conditions.
3) Retrofitting domestic refrigerators with a hydrocarbon mixture of R-290 and
Projeto sie emef mauricio cardoso
Inicialmente os alunos trabalharão na digitação de textos prontos (recortes de livros, revistas e jornais) entregues pela professora para a realização deste trabalho. O objetivo inicial é que os mesmos saibam identificar/encontrar e utilizar os sinais de pontuação e os principais caracteres.
I012255862
This document describes a Matlab program developed for soil classification according to the AASHTO soil classification system. The program classifies soil samples based on inputted liquid limit, plasticity index, and percentage passing the #200 sieve values. It outputs the AASHTO soil type classification as well as additional information like group index and general subgrade rating. The program was tested on sample soils from textbooks and correctly classified them. It provides an easier way to classify soils than manually using charts. The program aims to reduce errors, save time, and provide a user-friendly soil classification tool for engineers.
I012274853
This document summarizes a study that tested reinforced concrete beam-column connections under cyclic loading to evaluate their seismic performance. A 1/3 scale beam-column specimen was designed and constructed based on analysis of a 4-story building frame. The specimen was tested under reversed cyclic loading with increasing displacements up to failure while monitoring response through instruments. Cracks initially formed in flexure and progressed to shear cracks. Analysis of load-displacement hysteresis loops provided information on ductility, energy dissipation, strength degradation, and stiffness degradation to evaluate the seismic performance of the connection.
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