The ppt is about process concept in operating system. Process states and process control block, along with context switching has been discussed in details.
A process contains the program code, stack, data section, and heap. It is represented in the operating system by a process control block that stores information like the process state, number, program counter, registers, and open files. The operating system uses a scheduler to select processes from memory and choose among ready processes, switching between them through context switching that saves the current process control block and loads the next one.
The document summarizes a seminar on scheduling, knowledge-based scheduling, computer hierarchy control, and supervisory control. It discusses that scheduling is important for manufacturing efficiency and productivity. Knowledge-based scheduling uses a database, knowledge base, and inference engine. Computer hierarchy control uses multiple process control stations throughout a plant networked to a central control room. Supervisory control manages integrated unit operations to achieve economic objectives for a process.
The process scheduler is responsible for microscopic scheduling by allocating processors to processes and deciding which process runs, for how long, and when. It keeps track of process states using a process control block for each process. Scheduling policies determine which ready process is assigned the processor and for how long based on factors like priority, time quantum elapsed, or an I/O request. Without synchronization, race conditions and deadly embraces can occur when processes share resources.
The document discusses processes, process states, and process scheduling. It defines a process as a program in execution that contains the program counter, CPU registers, and other information. Processes go through various states like new, running, waiting, ready, and terminated. The OS tracks information about each process using a process control block (PCB). Process scheduling involves long-term, medium-term, and short-term scheduling to manage processes in memory and allocate CPU time. Context switching refers to saving and restoring a process's state when switching between processes. Inter-process communication allows processes to share resources and data. Threads are lightweight processes that can be used for parallelism and responsiveness.
A process is an instance of a running program that uses system resources like memory, CPU time, files, and I/O devices. Processes allow for resource sharing, computation speedup, and protection between programs. The operating system manages processes through process control blocks that contain the process state, program counter, CPU registers, and scheduling information. Processes can be in one of five states: new, running, waiting, ready, or terminated. The OS uses process control structures like process tables to track the location and attributes of each process, including the process ID, processor state, and control information.
This document discusses data recovery processes and quality of service (QoS). It begins by classifying different types of failures that can occur, such as transaction failures, system crashes, and disk failures. It then describes the ARIES recovery algorithm, which consists of analysis, redo, and undo phases. Log-based recovery using undo and redo operations on the log is explained. Checkpointing is discussed as a way to streamline recovery. QoS is defined as the ability to provide different priorities and guaranteed levels of performance. Factors that can affect QoS for mobile networks are also outlined.
A process is a program in execution that requires resources like CPU, memory, and I/O to accomplish its tasks. A thread is a specific function within a process. A process can consist of multiple threads to perform different tasks concurrently. The operating system is responsible for process management activities like creation, termination, scheduling, and synchronization of processes and threads. It uses data structures like the Process Control Block to store process information and queues to manage processes in different states like ready, running, blocked.
The document discusses process management in operating systems. It defines a process as a program in execution that must progress sequentially. A process has multiple parts including code, activity, stack, and data sections. It describes the process concept, states such as running and waiting, and the process control block used to store process information. The document also discusses threads as a way to allow multiple execution locations within a process and covers process scheduling, ready and wait queues, and context switching between processes.
A process contains the program code, stack, data section, and heap. It is represented in the operating system by a process control block that stores information like the process state, number, program counter, registers, and open files. The operating system uses a scheduler to select processes from memory and choose among ready processes, switching between them through context switching that saves the current process control block and loads the next one.
The document summarizes a seminar on scheduling, knowledge-based scheduling, computer hierarchy control, and supervisory control. It discusses that scheduling is important for manufacturing efficiency and productivity. Knowledge-based scheduling uses a database, knowledge base, and inference engine. Computer hierarchy control uses multiple process control stations throughout a plant networked to a central control room. Supervisory control manages integrated unit operations to achieve economic objectives for a process.
The process scheduler is responsible for microscopic scheduling by allocating processors to processes and deciding which process runs, for how long, and when. It keeps track of process states using a process control block for each process. Scheduling policies determine which ready process is assigned the processor and for how long based on factors like priority, time quantum elapsed, or an I/O request. Without synchronization, race conditions and deadly embraces can occur when processes share resources.
The document discusses processes, process states, and process scheduling. It defines a process as a program in execution that contains the program counter, CPU registers, and other information. Processes go through various states like new, running, waiting, ready, and terminated. The OS tracks information about each process using a process control block (PCB). Process scheduling involves long-term, medium-term, and short-term scheduling to manage processes in memory and allocate CPU time. Context switching refers to saving and restoring a process's state when switching between processes. Inter-process communication allows processes to share resources and data. Threads are lightweight processes that can be used for parallelism and responsiveness.
A process is an instance of a running program that uses system resources like memory, CPU time, files, and I/O devices. Processes allow for resource sharing, computation speedup, and protection between programs. The operating system manages processes through process control blocks that contain the process state, program counter, CPU registers, and scheduling information. Processes can be in one of five states: new, running, waiting, ready, or terminated. The OS uses process control structures like process tables to track the location and attributes of each process, including the process ID, processor state, and control information.
This document discusses data recovery processes and quality of service (QoS). It begins by classifying different types of failures that can occur, such as transaction failures, system crashes, and disk failures. It then describes the ARIES recovery algorithm, which consists of analysis, redo, and undo phases. Log-based recovery using undo and redo operations on the log is explained. Checkpointing is discussed as a way to streamline recovery. QoS is defined as the ability to provide different priorities and guaranteed levels of performance. Factors that can affect QoS for mobile networks are also outlined.
A process is a program in execution that requires resources like CPU, memory, and I/O to accomplish its tasks. A thread is a specific function within a process. A process can consist of multiple threads to perform different tasks concurrently. The operating system is responsible for process management activities like creation, termination, scheduling, and synchronization of processes and threads. It uses data structures like the Process Control Block to store process information and queues to manage processes in different states like ready, running, blocked.
The document discusses process management in operating systems. It defines a process as a program in execution that must progress sequentially. A process has multiple parts including code, activity, stack, and data sections. It describes the process concept, states such as running and waiting, and the process control block used to store process information. The document also discusses threads as a way to allow multiple execution locations within a process and covers process scheduling, ready and wait queues, and context switching between processes.
Processes are programs in execution that include a program counter, stack, and data section. Each process is represented in the operating system by a process control block that contains the process state, CPU registers, scheduling information, memory management information, and I/O status. When switching between processes, the CPU saves the state of the old process and loads the saved state of the new process via a context switch. Process scheduling aims to maximize CPU usage by quickly switching processes onto the CPU for time sharing using scheduling queues.
This document discusses process management in operating systems. It covers key topics like process control blocks, scheduling queues, types of schedulers (long-term, short-term, medium-term), context switching, multithreading models (many-to-one, one-to-one, many-to-many), and scheduling algorithms. The document provides details on how operating systems manage processes and computer resources to ensure efficient execution of programs.
Operating Systems chap 2_updated2 (1).pptxAmanuelmergia
The document discusses processes and process management in operating systems. It begins with an analogy comparing workers to programs and processes. It then defines a process as a program in execution that requires resources like memory and CPU. The document outlines the lifecycle of a process through various states like ready, running, waiting etc. It describes process creation, termination, and scheduling. Process control blocks containing process information are discussed. The need for process management and operations like context switching and process synchronization are also summarized.
The document discusses processes and process management in operating systems. It begins with an analogy comparing workers to programs and processes. It then defines a process as a program in execution that requires resources like memory and CPU. The document outlines the lifecycle of a process through various states like ready, running, waiting etc. It describes process creation, termination, and scheduling. Process control blocks containing process information are discussed. The need for process management and operations like context switching and process synchronization are also covered.
Processes are running instances of programs that are being executed. A process goes through various states like new, running, waiting, ready and terminated. The operating system manages processes through a process control block (PCB) for each process, which contains information about that process. Context switching allows the operating system to suspend one process and resume another by saving and restoring their contexts when an interrupt occurs. Processes can contain multiple threads, which are individual units of execution within the process.
The document discusses processes and process management in operating systems. It begins with an analogy comparing workers to programs and processes. It then defines a process as a program in execution that uses system resources like memory and CPU. The document outlines the different states a process can be in, like ready, running, waiting, and describes how processes transition between these states. It discusses the concept of a process control block that contains information about each process like its state, registers, and scheduling information. The document also covers topics like process creation, changing process states, suspending processes, and interprocess communication.
Operating system 18 process creation and terminationVaibhav Khanna
Information associated with each process
(also called task control block)
Process state – running, waiting, etc
Program counter – location of instruction to next execute
CPU registers – contents of all process-centric registers
CPU scheduling information- priorities, scheduling queue pointers
Memory-management information – memory allocated to the process
Accounting information – CPU used, clock time elapsed since start, time limits
I/O status information – I/O devices allocated to process, list of open files
A process is a program in execution that includes the program counter, processor registers, stack, data section, and heap. A process can be in different states such as new, running, waiting, ready, or terminated. The operating system represents each process using a Process Control Block that stores information about the process's state, resources, scheduling, and more. This allows the operating system to efficiently manage and switch between the execution of different processes.
The document discusses key concepts related to operating system processes including:
1) A process includes a program counter, stack, data section and can be in one of several states like running, ready, waiting, or terminated.
2) A process control block contains information about a process like its state, registers, and scheduling information.
3) There are different scheduling queues like the ready queue for processes in memory and devices queues for processes waiting for I/O.
4) Schedulers like long-term and short-term schedulers manage moving processes between queues and allocating the CPU.
Processes and Processor Management discusses processes, scheduling, and interprocess communication.
A process is a program in execution that progresses sequentially through code, data, and stack sections. Processes change state between new, running, waiting, ready, and terminated. Each process has a process control block storing its state and scheduling information. The CPU scheduler selects processes from ready queues for execution on CPUs to maximize usage. Processes communicate through shared memory and message passing.
A process is the basic unit of execution in an operating system. It consists of a program in execution along with additional system resources and state. Key aspects of a process include its process control block (PCB) which stores process state and scheduling information, and the different states a process can be in such as running, ready, waiting, etc. Processes communicate and synchronize through interprocess communication which allows sharing data and coordinating work. The operating system performs process scheduling to allocate the CPU to processes and enable multitasking.
The document discusses processes and process management in operating systems. Key points include:
- A process is an instance of a running program and includes the program code, data, resources used by the program, and process execution status information.
- The operating system uses process control blocks (PCBs) and tables to manage processes and allocate CPU, memory, I/O, and other resources among processes.
- Processes can be in different states like running, ready, blocked, or suspended. The operating system performs scheduling to switch processes in and out of the running state.
CPU Scheduling Criteria CPU Scheduling Criteria (1).pptxTSha7
The document discusses key concepts related to CPU scheduling in operating systems. It defines CPU scheduling and its purpose of allowing concurrent process execution. It describes the criteria used for scheduling algorithms and their evaluation. It also explains the different states a process can be in, including new, ready, running, blocked/wait, and terminated. The types of schedulers - long term, short term, and medium term - and their different objectives and functions are outlined as well.
A process is a program in execution. It is a unit of work within the system. Program is a passive entity, process is an active entity.
Process needs resources to accomplish its task
CPU, memory, I/O, files
Initialization data
Process termination requires reclaim of any reusable resources
Single-threaded process has one program counter specifying location of next instruction to execute
Process executes instructions sequentially, one at a time, until completion
Multi-threaded process has one program counter per thread
Typically system has many processes, some user, some operating system running concurrently on one or more CPUs
Concurrency by multiplexing the CPUs among the processes / threads
The document discusses various concepts related to process management in operating systems including process scheduling, CPU scheduling, and process synchronization. It defines a process as a program in execution and describes the different states a process can be in during its lifecycle. It also discusses process control blocks which maintain information about each process, and various scheduling algorithms like first come first serve, shortest job first, priority and round robin scheduling.
The document discusses key concepts related to process management in operating systems. It describes that an OS executes programs as processes, which can be in various states like running, waiting, ready etc. It also explains process control blocks that contain details of a process like state, registers, scheduling info etc. The document discusses process scheduling and synchronization techniques used by the OS to share CPU and other resources between multiple processes. It describes mechanisms for process creation, termination and interprocess communication using shared memory and message passing.
Operating system 28 fundamental of schedulingVaibhav Khanna
The objective of multiprogramming is to have some process running at all times to maximize CPU utilization.
The objective of time-sharing system is to switch the CPU among processes so frequently that users can interact with each program while it is running.
For a uniprocessor system, there will never be more than one running process.
If there are more processes, the rest will have to wait until the CPU is free and can be rescheduled
The objectives of these slides are -
- To introduce the notion of a process - a program in execution, which forms the basis of all computation
- To describe the various features of processes, including scheduling, creation and termination, and communication
- To explore inter-process communication using shared memory and message passing
Processes are programs in execution that include a program counter, stack, and data section. Each process is represented in the operating system by a process control block that contains the process state, CPU registers, scheduling information, memory management information, and I/O status. When switching between processes, the CPU saves the state of the old process and loads the saved state of the new process via a context switch. Process scheduling aims to maximize CPU usage by quickly switching processes onto the CPU for time sharing using scheduling queues.
This document discusses process management in operating systems. It covers key topics like process control blocks, scheduling queues, types of schedulers (long-term, short-term, medium-term), context switching, multithreading models (many-to-one, one-to-one, many-to-many), and scheduling algorithms. The document provides details on how operating systems manage processes and computer resources to ensure efficient execution of programs.
Operating Systems chap 2_updated2 (1).pptxAmanuelmergia
The document discusses processes and process management in operating systems. It begins with an analogy comparing workers to programs and processes. It then defines a process as a program in execution that requires resources like memory and CPU. The document outlines the lifecycle of a process through various states like ready, running, waiting etc. It describes process creation, termination, and scheduling. Process control blocks containing process information are discussed. The need for process management and operations like context switching and process synchronization are also summarized.
The document discusses processes and process management in operating systems. It begins with an analogy comparing workers to programs and processes. It then defines a process as a program in execution that requires resources like memory and CPU. The document outlines the lifecycle of a process through various states like ready, running, waiting etc. It describes process creation, termination, and scheduling. Process control blocks containing process information are discussed. The need for process management and operations like context switching and process synchronization are also covered.
Processes are running instances of programs that are being executed. A process goes through various states like new, running, waiting, ready and terminated. The operating system manages processes through a process control block (PCB) for each process, which contains information about that process. Context switching allows the operating system to suspend one process and resume another by saving and restoring their contexts when an interrupt occurs. Processes can contain multiple threads, which are individual units of execution within the process.
The document discusses processes and process management in operating systems. It begins with an analogy comparing workers to programs and processes. It then defines a process as a program in execution that uses system resources like memory and CPU. The document outlines the different states a process can be in, like ready, running, waiting, and describes how processes transition between these states. It discusses the concept of a process control block that contains information about each process like its state, registers, and scheduling information. The document also covers topics like process creation, changing process states, suspending processes, and interprocess communication.
Operating system 18 process creation and terminationVaibhav Khanna
Information associated with each process
(also called task control block)
Process state – running, waiting, etc
Program counter – location of instruction to next execute
CPU registers – contents of all process-centric registers
CPU scheduling information- priorities, scheduling queue pointers
Memory-management information – memory allocated to the process
Accounting information – CPU used, clock time elapsed since start, time limits
I/O status information – I/O devices allocated to process, list of open files
A process is a program in execution that includes the program counter, processor registers, stack, data section, and heap. A process can be in different states such as new, running, waiting, ready, or terminated. The operating system represents each process using a Process Control Block that stores information about the process's state, resources, scheduling, and more. This allows the operating system to efficiently manage and switch between the execution of different processes.
The document discusses key concepts related to operating system processes including:
1) A process includes a program counter, stack, data section and can be in one of several states like running, ready, waiting, or terminated.
2) A process control block contains information about a process like its state, registers, and scheduling information.
3) There are different scheduling queues like the ready queue for processes in memory and devices queues for processes waiting for I/O.
4) Schedulers like long-term and short-term schedulers manage moving processes between queues and allocating the CPU.
Processes and Processor Management discusses processes, scheduling, and interprocess communication.
A process is a program in execution that progresses sequentially through code, data, and stack sections. Processes change state between new, running, waiting, ready, and terminated. Each process has a process control block storing its state and scheduling information. The CPU scheduler selects processes from ready queues for execution on CPUs to maximize usage. Processes communicate through shared memory and message passing.
A process is the basic unit of execution in an operating system. It consists of a program in execution along with additional system resources and state. Key aspects of a process include its process control block (PCB) which stores process state and scheduling information, and the different states a process can be in such as running, ready, waiting, etc. Processes communicate and synchronize through interprocess communication which allows sharing data and coordinating work. The operating system performs process scheduling to allocate the CPU to processes and enable multitasking.
The document discusses processes and process management in operating systems. Key points include:
- A process is an instance of a running program and includes the program code, data, resources used by the program, and process execution status information.
- The operating system uses process control blocks (PCBs) and tables to manage processes and allocate CPU, memory, I/O, and other resources among processes.
- Processes can be in different states like running, ready, blocked, or suspended. The operating system performs scheduling to switch processes in and out of the running state.
CPU Scheduling Criteria CPU Scheduling Criteria (1).pptxTSha7
The document discusses key concepts related to CPU scheduling in operating systems. It defines CPU scheduling and its purpose of allowing concurrent process execution. It describes the criteria used for scheduling algorithms and their evaluation. It also explains the different states a process can be in, including new, ready, running, blocked/wait, and terminated. The types of schedulers - long term, short term, and medium term - and their different objectives and functions are outlined as well.
A process is a program in execution. It is a unit of work within the system. Program is a passive entity, process is an active entity.
Process needs resources to accomplish its task
CPU, memory, I/O, files
Initialization data
Process termination requires reclaim of any reusable resources
Single-threaded process has one program counter specifying location of next instruction to execute
Process executes instructions sequentially, one at a time, until completion
Multi-threaded process has one program counter per thread
Typically system has many processes, some user, some operating system running concurrently on one or more CPUs
Concurrency by multiplexing the CPUs among the processes / threads
The document discusses various concepts related to process management in operating systems including process scheduling, CPU scheduling, and process synchronization. It defines a process as a program in execution and describes the different states a process can be in during its lifecycle. It also discusses process control blocks which maintain information about each process, and various scheduling algorithms like first come first serve, shortest job first, priority and round robin scheduling.
The document discusses key concepts related to process management in operating systems. It describes that an OS executes programs as processes, which can be in various states like running, waiting, ready etc. It also explains process control blocks that contain details of a process like state, registers, scheduling info etc. The document discusses process scheduling and synchronization techniques used by the OS to share CPU and other resources between multiple processes. It describes mechanisms for process creation, termination and interprocess communication using shared memory and message passing.
Operating system 28 fundamental of schedulingVaibhav Khanna
The objective of multiprogramming is to have some process running at all times to maximize CPU utilization.
The objective of time-sharing system is to switch the CPU among processes so frequently that users can interact with each program while it is running.
For a uniprocessor system, there will never be more than one running process.
If there are more processes, the rest will have to wait until the CPU is free and can be rescheduled
The objectives of these slides are -
- To introduce the notion of a process - a program in execution, which forms the basis of all computation
- To describe the various features of processes, including scheduling, creation and termination, and communication
- To explore inter-process communication using shared memory and message passing
Introduction- e - waste – definition - sources of e-waste– hazardous substances in e-waste - effects of e-waste on environment and human health- need for e-waste management– e-waste handling rules - waste minimization techniques for managing e-waste – recycling of e-waste - disposal treatment methods of e- waste – mechanism of extraction of precious metal from leaching solution-global Scenario of E-waste – E-waste in India- case studies.
A review on techniques and modelling methodologies used for checking electrom...nooriasukmaningtyas
The proper function of the integrated circuit (IC) in an inhibiting electromagnetic environment has always been a serious concern throughout the decades of revolution in the world of electronics, from disjunct devices to today’s integrated circuit technology, where billions of transistors are combined on a single chip. The automotive industry and smart vehicles in particular, are confronting design issues such as being prone to electromagnetic interference (EMI). Electronic control devices calculate incorrect outputs because of EMI and sensors give misleading values which can prove fatal in case of automotives. In this paper, the authors have non exhaustively tried to review research work concerned with the investigation of EMI in ICs and prediction of this EMI using various modelling methodologies and measurement setups.
ACEP Magazine edition 4th launched on 05.06.2024Rahul
This document provides information about the third edition of the magazine "Sthapatya" published by the Association of Civil Engineers (Practicing) Aurangabad. It includes messages from current and past presidents of ACEP, memories and photos from past ACEP events, information on life time achievement awards given by ACEP, and a technical article on concrete maintenance, repairs and strengthening. The document highlights activities of ACEP and provides a technical educational article for members.
Batteries -Introduction – Types of Batteries – discharging and charging of battery - characteristics of battery –battery rating- various tests on battery- – Primary battery: silver button cell- Secondary battery :Ni-Cd battery-modern battery: lithium ion battery-maintenance of batteries-choices of batteries for electric vehicle applications.
Fuel Cells: Introduction- importance and classification of fuel cells - description, principle, components, applications of fuel cells: H2-O2 fuel cell, alkaline fuel cell, molten carbonate fuel cell and direct methanol fuel cells.
Electric vehicle and photovoltaic advanced roles in enhancing the financial p...IJECEIAES
Climate change's impact on the planet forced the United Nations and governments to promote green energies and electric transportation. The deployments of photovoltaic (PV) and electric vehicle (EV) systems gained stronger momentum due to their numerous advantages over fossil fuel types. The advantages go beyond sustainability to reach financial support and stability. The work in this paper introduces the hybrid system between PV and EV to support industrial and commercial plants. This paper covers the theoretical framework of the proposed hybrid system including the required equation to complete the cost analysis when PV and EV are present. In addition, the proposed design diagram which sets the priorities and requirements of the system is presented. The proposed approach allows setup to advance their power stability, especially during power outages. The presented information supports researchers and plant owners to complete the necessary analysis while promoting the deployment of clean energy. The result of a case study that represents a dairy milk farmer supports the theoretical works and highlights its advanced benefits to existing plants. The short return on investment of the proposed approach supports the paper's novelty approach for the sustainable electrical system. In addition, the proposed system allows for an isolated power setup without the need for a transmission line which enhances the safety of the electrical network
Harnessing WebAssembly for Real-time Stateless Streaming PipelinesChristina Lin
Traditionally, dealing with real-time data pipelines has involved significant overhead, even for straightforward tasks like data transformation or masking. However, in this talk, we’ll venture into the dynamic realm of WebAssembly (WASM) and discover how it can revolutionize the creation of stateless streaming pipelines within a Kafka (Redpanda) broker. These pipelines are adept at managing low-latency, high-data-volume scenarios.
CHINA’S GEO-ECONOMIC OUTREACH IN CENTRAL ASIAN COUNTRIES AND FUTURE PROSPECTjpsjournal1
The rivalry between prominent international actors for dominance over Central Asia's hydrocarbon
reserves and the ancient silk trade route, along with China's diplomatic endeavours in the area, has been
referred to as the "New Great Game." This research centres on the power struggle, considering
geopolitical, geostrategic, and geoeconomic variables. Topics including trade, political hegemony, oil
politics, and conventional and nontraditional security are all explored and explained by the researcher.
Using Mackinder's Heartland, Spykman Rimland, and Hegemonic Stability theories, examines China's role
in Central Asia. This study adheres to the empirical epistemological method and has taken care of
objectivity. This study analyze primary and secondary research documents critically to elaborate role of
china’s geo economic outreach in central Asian countries and its future prospect. China is thriving in trade,
pipeline politics, and winning states, according to this study, thanks to important instruments like the
Shanghai Cooperation Organisation and the Belt and Road Economic Initiative. According to this study,
China is seeing significant success in commerce, pipeline politics, and gaining influence on other
governments. This success may be attributed to the effective utilisation of key tools such as the Shanghai
Cooperation Organisation and the Belt and Road Economic Initiative.
Embedded machine learning-based road conditions and driving behavior monitoringIJECEIAES
Car accident rates have increased in recent years, resulting in losses in human lives, properties, and other financial costs. An embedded machine learning-based system is developed to address this critical issue. The system can monitor road conditions, detect driving patterns, and identify aggressive driving behaviors. The system is based on neural networks trained on a comprehensive dataset of driving events, driving styles, and road conditions. The system effectively detects potential risks and helps mitigate the frequency and impact of accidents. The primary goal is to ensure the safety of drivers and vehicles. Collecting data involved gathering information on three key road events: normal street and normal drive, speed bumps, circular yellow speed bumps, and three aggressive driving actions: sudden start, sudden stop, and sudden entry. The gathered data is processed and analyzed using a machine learning system designed for limited power and memory devices. The developed system resulted in 91.9% accuracy, 93.6% precision, and 92% recall. The achieved inference time on an Arduino Nano 33 BLE Sense with a 32-bit CPU running at 64 MHz is 34 ms and requires 2.6 kB peak RAM and 139.9 kB program flash memory, making it suitable for resource-constrained embedded systems.
Advanced control scheme of doubly fed induction generator for wind turbine us...IJECEIAES
This paper describes a speed control device for generating electrical energy on an electricity network based on the doubly fed induction generator (DFIG) used for wind power conversion systems. At first, a double-fed induction generator model was constructed. A control law is formulated to govern the flow of energy between the stator of a DFIG and the energy network using three types of controllers: proportional integral (PI), sliding mode controller (SMC) and second order sliding mode controller (SOSMC). Their different results in terms of power reference tracking, reaction to unexpected speed fluctuations, sensitivity to perturbations, and resilience against machine parameter alterations are compared. MATLAB/Simulink was used to conduct the simulations for the preceding study. Multiple simulations have shown very satisfying results, and the investigations demonstrate the efficacy and power-enhancing capabilities of the suggested control system.
Using recycled concrete aggregates (RCA) for pavements is crucial to achieving sustainability. Implementing RCA for new pavement can minimize carbon footprint, conserve natural resources, reduce harmful emissions, and lower life cycle costs. Compared to natural aggregate (NA), RCA pavement has fewer comprehensive studies and sustainability assessments.
2. Process Definition
• Process is a program in execution
• Process execution must progress in sequential fashion
• Textbook uses the terms job and process almost interchangeably
• Batch system –> jobs
• Time-shared systems – >user programs or tasks
4. Process State
• As a process executes, it changes state
• new: The process is being created.
• running: Instructions are being executed.
• waiting: The process is waiting for some event to occur.
• ready: The process is waiting to be assigned to a process.
• terminated: The process has finished execution.
6. Process Control Block (PCB)
Information associated with each process.
• Process state
• Program counter
• CPU registers
• CPU scheduling information
• Memory-management information
• Accounting information
• I/O status information
Manifestation of a process in operating system
9. Process Scheduling Queues
• Job queue – set of all processes in the system.
• Ready queue – set of all processes residing in main memory,
ready and waiting to execute.
• Device queues – set of processes waiting for an I/O device.
• Process migration between the various queues.