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Books > Professional & Technical > Energy technology & engineering > Electrical engineering > General

Metal-to-Nonmetal Transitions (Hardcover, 2010 Ed.): Ronald Redmer, Friedrich Hensel, Bastian Holst Metal-to-Nonmetal Transitions (Hardcover, 2010 Ed.)
Ronald Redmer, Friedrich Hensel, Bastian Holst
R2,664 Discovery Miles 26 640 Ships in 18 - 22 working days

This book is devoted to nonmetal-to-metal transitions. The original ideas of Mott for such a transition in solids have been adapted to describe a broad variety of phenomena in condensed matter physics (solids, liquids, and fluids), in plasma and cluster physics, as well as in nuclear physics (nuclear matter and quark-gluon systems). The book gives a comprehensive overview of theoretical methods and experimental results of the current research on the Mott effect for this wide spectrum of topics. The fundamental problem is the transition from localized to delocalized states which describes the nonmetal-to-metal transition in these diverse systems. Based on the ideas of Mott, Hubbard, Anderson as well as Landau and Zeldovich, internationally respected scientists present the scientific challenges and highlight the enormous progress which has been achieved over the last years. The level of description is aimed to specialists in these fields as well as to young scientists who will get an overview for their own work. A common feature of all contribution is the extensive discussion of bound states," i.e. their formation and dissolution due to medium effects. This applies to atoms and molecules in plasmas, fluids, and small clusters, excitons in semiconductors, or nucleons, deuterons, and alpha-particles in nuclear matter. In this way, the transition from delocalized to localized states and vice versa can be described on a common level."

Design Sensitivity Analysis and Optimization of Electromagnetic Systems (Hardcover, 1st ed. 2019): Il Han Park Design Sensitivity Analysis and Optimization of Electromagnetic Systems (Hardcover, 1st ed. 2019)
Il Han Park
R4,063 Discovery Miles 40 630 Ships in 18 - 22 working days

This book presents a comprehensive introduction to design sensitivity analysis theory as applied to electromagnetic systems. It treats the subject in a unified manner, providing numerical methods and design examples. The specific focus is on continuum design sensitivity analysis, which offers significant advantages over discrete design sensitivity methods. Continuum design sensitivity formulas are derived from the material derivative in continuum mechanics and the variational form of the governing equation. Continuum sensitivity analysis is applied to Maxwell equations of electrostatic, magnetostatic and eddy-current systems, and then the sensitivity formulas for each system are derived in a closed form; an integration along the design interface. The book also introduces the recent breakthrough of the topology optimization method, which is accomplished by coupling the level set method and continuum design sensitivity. This topology optimization method enhances the possibility of the global minimum with minimised computational time, and in addition the evolving shapes during the iterative design process are easily captured in the level set equation. Moreover, since the optimization algorithm is transformed into a well-known transient analysis algorithm for differential equations, its numerical implementation becomes very simple and convenient. Despite the complex derivation processes and mathematical expressions, the obtained sensitivity formulas are very straightforward for numerical implementation. This book provides detailed explanation of the background theory and the derivation process, which will help readers understand the design method and will set the foundation for advanced research in the future.

Electrical Age [microform]; v.38 (Hardcover): Anonymous Electrical Age [microform]; v.38 (Hardcover)
Anonymous
R1,018 Discovery Miles 10 180 Ships in 10 - 15 working days
Dielectric Phenomena In High Voltage Engineering (Hardcover): F. W. Peek Dielectric Phenomena In High Voltage Engineering (Hardcover)
F. W. Peek
R1,022 Discovery Miles 10 220 Ships in 10 - 15 working days

Originally published in 1915. PREFACE: It is the object of the author to give in this book the properties of gaseous, liquid and solid insulations, and methods of utilizing these properties to the best advantage in the problems of highvoltage engineering. Such problems require a knowledge, not only of the laws and mechanism of breakdown of dielectrics as determined by experiment, but also a simple working knowledge of the dielectric circuit. Methods that have proved useful in designing apparatus, transmission lines, insulators, bushings, etc., are discussed and illustrated by practical application. In addition, such subjects as the manner of making extensive engineering investigations and of reducing data, the measurement of high voltages, the effects of impulse and high-frequency voltages, methods of draw- ing dielectric fields, outline of modern theory, various dielectric phenomena, etc., are considered. In all cases where laws and discussions of dielectric phenomena are given, it has been thought best to accompany these with experimental data. Much original work is given, as well as reference to other in- vestigations. The authors extensive research was made possible by facilities afforded by the Consulting Engineering Department of the General Electric Company, for which acknowledgment is made. Thanks are due Mr. H. K. Humphrey, and others, who have greatly assisted in the experiments and calculations. SCHENECTADY, N. Y., April, 1915. Contents include: PAGE PREFACE v DIELECTRIC UNITS xi TABLE OF SYMBOLS, xiii CHAPTER I INTRODUCTION. ..... v ... v General discussion of energy transfer Experimental plots of dielectric and magnetic fields Analogy between magnetic and dielectric fieldsAnalogy with Hooke s Law. CHAPTER II THE DIELECTRIC FIELD AND DIELECTRIC CIRCUIT 8 Mathematical Consideration General treatment of the dielectric field and dielectric circuit with discussion of principles used Parallel planes Field between per- mittance, etc. Concentric cylinders Permittance or capacity flux density and gradient Parallel wires Principles used in superposition of fields determination of resultant fields equation of equipotential surfaces, lines of force and flux density permittance gradient and equigradient surfaces Concentric spheres Spheres Two small equal spheres, field of, and permittance two large equal spheres, gradient, permittance Conditions for spark-over and local breakdown or corona Collected formulae for common electrodes Combinations of dielectrics of different permittivities Dielectric flux refraction Dielectric in series Dielectric in multiple Flux control Imperfect electric elastivity or absorption in dielectrics dielectric hysteresis. CHAPTER III VISUAL CORONA 38 General Summary and Discussion Appearance Chemical action A. C. and D. C. spacing and size of conductor Laws of visual corona formation Theory of corona Electron theory Air films at small spacings Aii density Measuring voltage by corona Conductor material, cables, oil and water on the conductors, humidity. lonization Wave shape, current in wire. Experimental Study and Method of Reducing Experimental Data Tests showing the effects of size and spacing of conductors Air density Temperature Barometric pressure Strength of air films Effect of frequency Conductor material, oil, water, dirt, humidity lonization Current in wire Stranded conductors Split conductors...

Advanced Experimental Methods for Noise Research in Nanoscale Electronic Devices (Hardcover, 2004 ed.): Josef Sikula, Michael... Advanced Experimental Methods for Noise Research in Nanoscale Electronic Devices (Hardcover, 2004 ed.)
Josef Sikula, Michael Levinshtein
R7,834 Discovery Miles 78 340 Ships in 18 - 22 working days

A discussion of recently developed experimental methods for noise research in nanoscale electronic devices, conducted by specialists in transport and stochastic phenomena in nanoscale physics. The approach described is to create methods for experimental observations of noise sources, their localization and their frequency spectrum, voltage-current and thermal dependences. Our current knowledge of measurement methods for mesoscopic devices is summarized to identify directions for future research, related to downscaling effects.

The directions for future research into fluctuation phenomena in quantum dot and quantum wire devices are specified. Nanoscale electronic devices will be the basic components for electronics of the 21st century. From this point of view the signal-to-noise ratio is a very important parameter for the device application. Since the noise is also a quality and reliability indicator, experimental methods will have a wide application in the future.

Modern Electrical Drives (Hardcover, 2000 ed.): H. Bulent Ertan, M. Yildirim UEctug, Ron Colyer, Alfio Consoli Modern Electrical Drives (Hardcover, 2000 ed.)
H. Bulent Ertan, M. Yildirim UEctug, Ron Colyer, Alfio Consoli
R8,062 Discovery Miles 80 620 Ships in 18 - 22 working days

Electrical drives lie at the heart of most industrial processes and make a major contribution to the comfort and high quality products we all take for granted. They provide the controller power needed at all levels, from megawatts in cement production to milliwatts in wrist watches. Other examples are legion, from the domestic kitchen to public utilities. The modern electrical drive is a complex item, comprising a controller, a static converter and an electrical motor. Some can be programmed by the user. Some can communicate with other drives. Semiconductor switches have improved, intelligent power modules have been introduced, all of which means that control techniques can be used now that were unimaginable a decade ago. Nor has the motor side stood still: high-energy permanent magnets, semiconductor switched reluctance motors, silicon micromotor technology, and soft magnetic materials produced by powder technology are all revolutionising the industry. But the electric drive is an enabling technology, so the revolution is rippling throughout the whole of industry.

Text Mining of Web-Based Medical Content (Hardcover): Amy Neustein Text Mining of Web-Based Medical Content (Hardcover)
Amy Neustein; Contributions by Johan Bellika, Angel Bravo-Salgado, Marius Brezovan, Dumitru Dan Burdescu, …
R2,410 Discovery Miles 24 100 Ships in 10 - 15 working days

* Includes Text Mining and Natural Language Processing Methods for extracting information from electronic health records and biomedical literature. * Analyzes text analytic tools for new media such as online forums, social media posts, tweets and video sharing. * Demonstrates how to use speech and audio technologies for improving access to online content for the visually impaired. Text Mining of Web-Based Medical Content examines various approaches to deriving high quality information from online biomedical literature, electronic health records, query search terms, social media posts and tweets. Using some of the latest empirical methods of knowledge extraction, the authors show how online content, generated by both professionals and laypersons, can be mined for valuable information about disease processes, adverse drug reactions not captured during clinical trials, and tropical fever outbreaks. Additionally, the authors show how to perform infromation extraction on a hospital intranet, how to build a social media search engine to glean information about patients' own experiences interacting with healthcare professionals, and how to improve access to online health information. This volume provides a wealth of timely material for health informatic professionals and machine learning, data mining, and natural language researchers. Topics in this book include: * Mining Biomedical Literature and Clinical Narratives * Medication Information Extraction * Machine Learning Techniques for Mining Medical Search Queries * Detecting the Level of Personal Health Information Revealed in Social Media * Curating Layperson's Personal Experiences with Health Care from Social Media and Twitter * Health Dialogue Systems for Improving Access to Online Content * Crowd-based Audio Clips to Improve Online Video Access for the Visually Impaired * Semantic-based Visual Information Retrieval for Mining Radiographic Image Data * Evaluating the Importance of Medical Terminology in YouTube Video Titles and Descriptions

Adaptive Hybrid Active Power Filters (Hardcover, 1st ed. 2019): Lei Wang, Man-Chung Wong, Chi-Seng Lam Adaptive Hybrid Active Power Filters (Hardcover, 1st ed. 2019)
Lei Wang, Man-Chung Wong, Chi-Seng Lam
R3,802 Discovery Miles 38 020 Ships in 18 - 22 working days

This book introduces advanced thyristor-based shunt hybrid active power filters (HAPFs) for power quality improvement in power grids, which are characterized by a low dc-link operating voltage and a wide compensation range. This means they can overcome the high dc-link voltage requirement of conventional active power filters and the narrow compensation range problem of LC-coupling hybrid active power filters. Consisting of 10 chapters, the book discusses the principle, design, control and hardware implementation of thyristor-based hybrid active power filters. It covers 1) V-I characteristics, cost analysis, power loss and reliability studies of different power filters; 2) mitigation of the harmonic injection technique for thyristor-controlled parts; 3) nonlinear pulse width modulation (PWM) control; 4) parameter design methods; 5) minimum inverter capacity design; 6) adaptive dc-link voltage control; 7) unbalanced control strategy; 8) selective compensation techniques; and 9) the hardware prototype design of thyristor-based HAPFs, verified by simulation and experimental results. It enables readers to gain an understanding of the basic power electronics techniques applied in power systems as well as the advanced techniques for controlling, implementing and designing advanced thyristor-based HAPFs.

Timing Optimization Through Clock Skew Scheduling (Hardcover, 2009 ed.): Ivan S. Kourtev, Baris Taskin, Eby G. Friedman Timing Optimization Through Clock Skew Scheduling (Hardcover, 2009 ed.)
Ivan S. Kourtev, Baris Taskin, Eby G. Friedman
R2,801 Discovery Miles 28 010 Ships in 18 - 22 working days

This book details timing analysis and optimization techniques for circuits with level-sensitive memory elements. It contains a linear programming formulation applicable to the timing analysis of large scale circuits and includes a delay insertion methodology that improves the efficiency of clock skew scheduling. Coverage also provides a framework for and results from implementing timing optimization algorithms in a parallel computing environment.

Turbo Coding (Hardcover, 1999 ed.): Chris Heegard, Stephen B Wicker Turbo Coding (Hardcover, 1999 ed.)
Chris Heegard, Stephen B Wicker
R4,132 Discovery Miles 41 320 Ships in 18 - 22 working days

When the 50th anniversary of the birth of Information Theory was celebrated at the 1998 IEEE International Symposium on Informa tion Theory in Boston, there was a great deal of reflection on the the year 1993 as a critical year. As the years pass and more perspec tive is gained, it is a fairly safe bet that we will view 1993 as the year when the "early years" of error control coding came to an end. This was the year in which Berrou, Glavieux and Thitimajshima pre sented "Near Shannon Limit Error-Correcting Coding and Decoding: Turbo Codes" at the International Conference on Communications in Geneva. In their presentation, Berrou et al. claimed that a combi nation of parallel concatenation and iterative decoding can provide reliable communications at a signal to noise ratio that is within a few tenths of a dB of the Shannon limit. Nearly fifty years of striving to achieve the promise of Shannon's noisy channel coding theorem had come to an end. The implications of this result were immediately apparent to all -coding gains on the order of 10 dB could be used to dramatically extend the range of communication receivers, increase data rates and services, or substantially reduce transmitter power levels. The 1993 ICC paper set in motion several research efforts that have permanently changed the way we look at error control coding."

Wireless Communications for Power Substations: RF Characterization and Modeling (Hardcover, 1st ed. 2019): Basile L. Agba,... Wireless Communications for Power Substations: RF Characterization and Modeling (Hardcover, 1st ed. 2019)
Basile L. Agba, Fabien Sacuto, Minh Au, Fabrice Labeau, Francois Gagnon
R3,791 Discovery Miles 37 910 Ships in 18 - 22 working days

This book consists of the identification, characterization, and modeling of electromagnetic interferences in substations for the deployment of wireless sensor networks. The authors present in chapter 3 the measurement setup to record sequences of impulsive noise samples in the ISM band of interest. The setup can measure substation impulsive noise, in wide band, with enough samples per time window and enough precision to allow a statistical study of the noise. During the measurement campaign, the authors recorded around 120 noise sequences in different substations and for four ranges of equipment voltage, which are 25 kV, 230 kV, 315 kV and 735 kV. A characterization process is proposed, by which physical characteristics of partial discharge can be measured in terms of first- and second-order statistics. From the measurement campaign, the authors infer the characteristics of substation impulsive noise as a function of the substation equipment voltage, and can provide representative parameters for the four voltage ranges and for several existing impulsive noise models. The authors investigate in chapters 4 and 5 the modeling of electromagnetic interferences caused by partial discharge sources. First, the authors propose a complete and coherent approach model that links physical characteristics of high-voltage installations to the induced radio-interference spectra of partial discharge sources. The goodness-of-fit of the proposed physical model has been measured based on some interesting statistical metrics. This allows one to assess the effectiveness of the authors' approach in terms of first- and second-order statistics. Chapter 6 proposes a model based on statistical approach. Indeed, substation impulsive noise is composed of correlated impulses, which would require models with memory in order to replicate a similar correlation. Among different models, we have configured a Partitioned Markov Chain (PMC) with 19 states (one state for the background noise and 18 states for the impulse); this Markov-Gaussian model is able to generate impulsive noise with correlated impulse samples. The correlation is observable on the impulse duration and the power spectrum of the impulses. Our PMC model provides characteristics that are more similar to the characteristics of substation impulsive noise in comparison with other models, in terms of time and frequency response, as well as Probability Density Functions (PDF). Although PMC represents reliably substation impulsive noise, the model remains complex in terms of parameter estimation due to a large number of Markov states, which can be an obstacle for future wireless system design. In order to simplify the model, the authors decrease the number of states to 7 by assigning one state to the background noise and 6 states to the impulse and we call this model PMC-6. PMC-6 can generate realistic impulses and can be easily implemented in a receiver in order to mitigate substation impulsive noise. Representative parameters are provided in order to replicate substation impulsive noise for different voltage ranges (25-735 kV). Chapter 7, a generalized radio-noise model for substations is proposed, in which there are many discharges sources that are randomly distributed over space and time according to the Poisson field of interferers approach. This allows for the identification of some interesting statistical properties of moments, cumulants and probability distributions. These can, in turn, be utilized in signal processing algorithms for rapid partial discharge's identification, localization, and impulsive noise mitigation techniques in wireless communications in substations. The primary audience for this book is the electrical and power engineering industry, electricity providers and companies who are interested in substation automation systems using wireless communication technologies for smart grid applications. Researchers, engineers and students studying and working in wireless communication will also want to buy this book as a reference.

Smart Micro-Grid Systems Security and Privacy (Hardcover, 1st ed. 2018): Anne V. D. M. Kayem, Stephen D. Wolthusen, Christoph... Smart Micro-Grid Systems Security and Privacy (Hardcover, 1st ed. 2018)
Anne V. D. M. Kayem, Stephen D. Wolthusen, Christoph Meinel
R2,653 Discovery Miles 26 530 Ships in 18 - 22 working days

This book is centered on Smart grids and micro-grids, as a cost-effective method of ensuring fair and equitable access to power in urban areas. It also considers scenarios where deploying smart grids can be both cost-prohibitively expensive and logistically challenging. Deploying smart microgrids instead, offers a reliable power solution but, as is the case in smart grids, a key issue is guaranteeing usability, trust, and reliability while protecting against energy theft. This book considers aspects such as state estimation, capacity planning, demand forecasting, price signals, and demand management with respect to energy theft. Straight-forward approaches to provoking energy theft on smart grids and micro-grids include mis-recordings power consumption/generation information and exposures of personally identifiable information or sensitive information. Attack models based on mis-recorded generation and/or consumption data and exposure of personally identifiable information, are also studied. In each case, countermeasures are proposed to circumvent the power theft attacks raised. Researchers in Smart Micro-grids security, cyber-physical systems, and critical infrastructure will want to purchase this book as a reference. Professionals, Researchers, Academics and students working in security general and Security of Critical Infrastructure, Privacy, and Data Sharing will also want to purchase this book as a reference.

Computational Analysis of Visual Motion (Hardcover, 1994 ed.): Amar Mitiche Computational Analysis of Visual Motion (Hardcover, 1994 ed.)
Amar Mitiche
R2,786 Discovery Miles 27 860 Ships in 18 - 22 working days

Image motion processing is important to machine vision systems because it can lead to the recovery of 3D structure and motion. Author Amar Mitiche offers a comprehensive mathematical treatment of this key subject in visual systems research. Mitiche examines the interpretation of point correspondences as well as the interpretation of straight line correspondences and optical flow. In addition, the author considers interpretation by knowledge-based systems and presents the relevant mathematical basis for 3D interpretation.

Advances in Automation and Robotics, Vol.2 - Selected papers from the 2011 International Conference on Automation and Robotics... Advances in Automation and Robotics, Vol.2 - Selected papers from the 2011 International Conference on Automation and Robotics (ICAR 2011), Dubai, December 1-2, 2011 (Hardcover, 2012)
Gary Lee
R5,505 Discovery Miles 55 050 Ships in 18 - 22 working days

The international conference on Automation and Robotics-ICAR2011 is held during December 12-13, 2011 in Dubai, UAE. The proceedings of ICAR2011 have been published by Springer Lecture Notes in Electrical Engineering, which include 163 excellent papers selected from more than 400 submitted papers.

The conference is intended to bring together the researchers and engineers/technologists working in different aspects of intelligent control systems and optimization, robotics and automation, signal processing, sensors, systems modeling and control, industrial engineering, production and management.

This part of proceedings includes 82 papers contributed by many researchers in relevant topic areas covered at ICAR2011 from various countries such as France, Japan, USA, Korea and China etc.

The session topic of this proceeding is signal processing and industrial engineering, production and management, which includes papers about signal reconstruction, mechanical sensors, real-time systems control system identification, change detection problems, business process modeling, production planning, scheduling and control, computer-based manufacturing technologies, systems modeling and simulation, facilities planning and management, quality control and management, precision engineering, intelligent design and manufacturing.

The papers in this proceedings focus on industry engineering to promote efficiency and affect for the world, which typically showed their advanced research work recently in their various field. I am sure that discussing with many colleagues will give much more creative idea for each other on ICAR2011.

All of papers with powerful evidence and detail demonstration involved the authors' numerous time and energy will be proved valuable by their unexhausted exploring sprit. Sincere thanks to the committee and all the authors, in additionally, including anonymous reviewers from many fields and organizations. They pointed out us direction to go on research work for the world.

"

High Performance AC Drives - Modelling Analysis and Control (Hardcover, Edition.): Mukhtar Ahmad High Performance AC Drives - Modelling Analysis and Control (Hardcover, Edition.)
Mukhtar Ahmad
R2,663 Discovery Miles 26 630 Ships in 18 - 22 working days

Variable speed is one of the important requirements in most of the electric drives. Earlier dc motors were the only drives that were used in industries requiring - eration over a wide range of speed with step less variation, or requiring fine ac- racy of speed control. Such drives are known as high performance drives. AC - tors because of being highly coupled non-linear devices can not provide fast dynamic response with normal controls. However, recently, because of ready availability of power electronic devices, and digital signal processors ac motors are beginning to be used for high performance drives. Field oriented control or vector control has made a fundamental change with regard to dynamic perfo- ance of ac machines. Vector control makes it possible to control induction or s- chronous motor in a manner similar to control scheme used for the separately - cited dc motor. Recent advances in artificial intelligence techniques have also contributed in the improvement in performance of electric drives. This book presents a comprehensive view of high performance ac drives. It may be considered as both a text book for graduate students and as an up-to-date monograph. It may also be used by R & D professionals involved in the impro- ment of performance of drives in the industries. The book will also be beneficial to the researchers pursuing work on sensorless and direct torque control of electric drives as up-to date references in these topics are provided.

Emerging Non-Volatile Memories (Hardcover, 2014 ed.): Seungbum Hong, Orlando Auciello, Dirk Wouters Emerging Non-Volatile Memories (Hardcover, 2014 ed.)
Seungbum Hong, Orlando Auciello, Dirk Wouters
R3,957 R3,427 Discovery Miles 34 270 Save R530 (13%) Ships in 10 - 15 working days

This book is an introduction to the fundamentals of emerging non-volatile memories and provides an overview of future trends in the field. Readers will find coverage of seven important memory technologies, including Ferroelectric Random Access Memory (FeRAM), Ferromagnetic RAM (FMRAM), Multiferroic RAM (MFRAM), Phase-Change Memories (PCM), Oxide-based Resistive RAM (RRAM), Probe Storage, and Polymer Memories. Chapters are structured to reflect diffusions and clashes between different topics. Emerging Non-Volatile Memories is an ideal book for graduate students, faculty, and professionals working in the area of non-volatile memory. This book also: Covers key memory technologies, including Ferroelectric Random Access Memory (FeRAM), Ferromagnetic RAM (FMRAM), and Multiferroic RAM (MFRAM), among others. Provides an overview of non-volatile memory fundamentals. Broadens readers' understanding of future trends in non-volatile memories.

Mobile and Wireless Network Security and Privacy (Hardcover, 2007 ed.): S. Kami Makki, Peter Reiher, Kia Makki, Niki Pissinou,... Mobile and Wireless Network Security and Privacy (Hardcover, 2007 ed.)
S. Kami Makki, Peter Reiher, Kia Makki, Niki Pissinou, Shamila Makki
R4,136 Discovery Miles 41 360 Ships in 18 - 22 working days

Mobile and Wireless Network Security and Privacy analyzes important security and privacy problems in the realms of wireless networks and mobile computing. The material includes a report to the National Science Foundation of the United States which will be used by program managers for the foundation in setting priorities for research directions in this area. In the following chapters field experts expand upon the report and provide further information about important research directions in the fields of wireless networks and mobile computing. The chapters are written by the leading international researchers and professionals in thes fields. Each chapter represents state-of-the-art research and includes several influential contributions. A multitude of valuable discussions on relevant concepts, such as the various approaches that define emerging security and privacy in mobile and wireless environment, are featured. The book is useful to researchers working in the fields of mobile and wireless security and privacy and to graduate students seeking new areas to perform research. It also provides information for academics and industry people researching recent trends and developments in the mobile and wireless security fields.

Wind Power Systems - Applications of Computational Intelligence (Hardcover, Edition.): Lingfeng Wang, Chanan Singh, Andrew... Wind Power Systems - Applications of Computational Intelligence (Hardcover, Edition.)
Lingfeng Wang, Chanan Singh, Andrew Kusiak
R4,096 Discovery Miles 40 960 Ships in 18 - 22 working days

Renewable energy sources such as wind power have attracted much attention because they are environmentally friendly, do not produce carbon dioxide and other emitants, and can enhance a nation's energy security. For example, recently more significant amounts of wind power are being integrated into conventional power grids. Therefore, it is necessary to address various important and challenging issues related to wind power systems, which are significantly different from the traditional generation systems. This book is a resource for engineers, practitioners, and decision-makers interested in studying or using the power of computational intelligence based algorithms in handling various important problems in wind power systems at the levels of power generation, transmission, and distribution. Researchers have been developing biologically-inspired algorithms in a wide variety of complex large-scale engineering domains. Distinguished from the traditional analytical methods, the new methods usually accomplish the task through their computationally efficient mechanisms. Computational intelligence methods such as evolutionary computation, neural networks, and fuzzy systems have attracted much attention in electric power systems. Meanwhile, modern electric power systems are becoming more and more complex in order to meet the growing electricity market. In particular, the grid complexity is continuously enhanced by the integration of intermittent wind power as well as the current restructuring efforts in electricity industry. Quite often, the traditional analytical methods become less efficient or even unable to handle this increased complexity. As a result, it is natural to apply computational intelligence as a powerful tool to deal with various important and pressing problems in the current wind power systems. This book presents the state-of-the-art development in the field of computational intelligence applied to wind power systems by reviewing the most up-to-date work and representative practical problems collecting contributions from leading experts in electrical engineering, system engineering, and other disciplines.

Petri Net Synthesis for Discrete Event Control of Manufacturing Systems (Hardcover, 1993 ed.): MengChu Zhou, F. DiCesare Petri Net Synthesis for Discrete Event Control of Manufacturing Systems (Hardcover, 1993 ed.)
MengChu Zhou, F. DiCesare
R4,145 Discovery Miles 41 450 Ships in 18 - 22 working days

Petri Net Synthesis for Discrete Event Control of Manufacturing Systems develops two essential resource-sharing concepts: parallel and sequential mutual exclusions and theoretical results in Petri synthesis. A parallel mutual exclusion (PME) is defined to model a resource shared by independent distributed processes, and a sequential mutual exclusion is a sequential composition of PMEs, modeling a resource shared by sequentially-related processes. A hybrid synthesis methodology for Petri net models and controllers is proposed using top-down, modular, and bottom-up design ideas and the mutual exclusion theory. An aggregate Petri net model is refined by replacing places and /or transitions with basic design modules which are mathematically and graphically described. Petri net design methods are presented for such buffers as automatic storage and retrieval systems. Using the proposed method synthesizes both Petri net structure and feasible initial markings, guaranteeing that resulting Petri nets have desirable system properties such as freedom from deadlock and cyclic behavior. A Petri net controller is extended to error recovery for automated manufacturing systems. The theory can guarantee that the desired system properties achieved by the original design will be preserved when the controller is augmented to deal with an error in the prescribed methods. Control code has been directly generated from Petri net definitions. The algorithm and implementation details are given for a flexible manufacturing system. Using the approach presented in Petri Net Synthesis for Discrete Event Control of Manufacturing Systems, engineers and research workers can develop their own discrete event control applications and experiments.

Electric Contacts - Theory and Application (Hardcover, Reprint of the 4th completely rewritten ed. Berlin/Heidelberg 1967. 3rd... Electric Contacts - Theory and Application (Hardcover, Reprint of the 4th completely rewritten ed. Berlin/Heidelberg 1967. 3rd printing)
Else Holm; Preface by J. B. P. Williamson; Ragnar Holm
R4,418 Discovery Miles 44 180 Ships in 10 - 15 working days

The fourth and last edition of this book was published in 1967. Although it has been out of print for many years it is still considered the "Bible" of contact theory and is referred to in almost every scientific paper dealing with electric contacts. This classic book serves as a basis for understanding of contacts and their use in technology. It contains fundamental theory, critical information and a richness of details including a pertinent literature list. A chapter is devoted to the tunnel effect, several chapters treat such friction and wear phenomena which are closely connected with the theory of electric contacts. Subjects covered include tarnishing of contact material, fritting of tarnish films in contacts, material transfer in switches and commutation, and the theory of thermal contacts.

Maintenance Scheduling in Restructured Power Systems (Hardcover, 2000 ed.): M. Shahidehpour, M. Marwali Maintenance Scheduling in Restructured Power Systems (Hardcover, 2000 ed.)
M. Shahidehpour, M. Marwali
R4,168 Discovery Miles 41 680 Ships in 18 - 22 working days

The overall goal of this book is to introduce algorithms for improving the economic posture of a utility company in a restructured power system by promoting cost-effective maintenance schedules. This book's topic is very timely as the electric utility industry is undergoing a major restructuring, and what used to be vertically integrated is now being unbundled. The restructuring has given rise to a number of separate business entities with their own objectives. In this breakup, the issue of maintenance scheduling has been missed completely since none of these entities currently have explicit accountability for this subject. The authors offer a logical alternative to traditional electric utility maintenance practices and a basis for making maintenance decisions. Maintenance scheduling problems are formulated as decomposed problems. This signifies the nature of restructured power systems with self-interested entities and optimizes potential revenues while meeting constraints such as fuel schedules, emission constraints, hourly load demands, and network limits. Coordination of short- and long-term maintenance scheduling is also presented. The book shows by numerous derivations and examples that careful planning and good coordination among self-interested entities in restructured power systems are essential to achieving an optimal trade-off between the cost of maintenance and service reliability. Maintenance Scheduling in Restructured Power Systems includes a variety of models, solutions and ideas that will be invaluable to engineers, consultants, manufacturers, students, and others working and studying in the utility field.

Semiconductor Modeling: - For Simulating Signal, Power, and Electromagnetic Integrity (Hardcover, 2006 ed.): Roy Leventhal Semiconductor Modeling: - For Simulating Signal, Power, and Electromagnetic Integrity (Hardcover, 2006 ed.)
Roy Leventhal; Contributions by D.J. Carpenter; Lynne Green
R4,438 Discovery Miles 44 380 Ships in 18 - 22 working days

Discusses process variation, model accuracy, design flow and many other practical engineering, reliability and manufacturing issues

Gives a good overview for a person who is not an expert in modeling and simulation, enabling them to extract the necessary information to competently use modeling and simulation programs

Written for engineering students and product design engineers

Proton Exchange Membrane Fuel Cells - Design, Modelling and Performance Assessment Techniques (Hardcover, 1st ed. 2018):... Proton Exchange Membrane Fuel Cells - Design, Modelling and Performance Assessment Techniques (Hardcover, 1st ed. 2018)
Al-Hussein Albarbar, Mohmad Alrweq
R3,742 Discovery Miles 37 420 Ships in 18 - 22 working days

This book examines the characteristics of Proton Exchange Membrane (PEM) Fuel Cells with a focus on deriving realistic finite element models. The book also explains in detail how to set up measuring systems, data analysis, and PEM Fuel Cells' static and dynamic characteristics. Covered in detail are design and operation principles such as polarization phenomenon, thermodynamic analysis, and overall voltage; failure modes and mechanisms such as permanent faults, membrane degradation, and water management; and modelling and numerical simulation including semi-empirical, one-dimensional, two-dimensional, and three-dimensional models. It is appropriate for graduate students, researchers, and engineers who work with the design and reliability of hydrogen fuel cells, in particular proton exchange membrane fuel cells.

Control Design Techniques in Power Electronics Devices (Hardcover, 2006 ed.): Hebertt J. Sira-Ramirez, Ramon Silva-Ortigoza Control Design Techniques in Power Electronics Devices (Hardcover, 2006 ed.)
Hebertt J. Sira-Ramirez, Ramon Silva-Ortigoza
R5,369 Discovery Miles 53 690 Ships in 10 - 15 working days

This book deals specifically with control theories relevant to the design of control units for switched power electronics devices, for the most part represented by DC DC converters and supplies, by rectifiers of different kinds and by inverters with varying topologies. The theoretical methods for designing controllers in linear and nonlinear systems are accompanied by multiple case studies and examples showing their application in the emerging field of power electronics.

Precision Temperature Sensors in CMOS Technology (Hardcover, 2006 ed.): Micheal A.P. Pertijs, Johan Huijsing Precision Temperature Sensors in CMOS Technology (Hardcover, 2006 ed.)
Micheal A.P. Pertijs, Johan Huijsing
R5,986 Discovery Miles 59 860 Ships in 10 - 15 working days

This book describes the analysis and design of precision temperature sensors in CMOS IC technology. It focusses on so-called smart temperature sensors, which provide a digital output signal that can be readily interpreted by a computer. The sensors described in this book are based on bipolar transistors, which are available as parasitic devices in standard CMOS technology. The relevant physical properties of these devices are described. It is shown in detail how their temperature characteristics can be used to obtain an accurate digital temperature reading. A sigma-delta converter plays a key role in the conversion to a digital output. Both the system-level design of such a converter, and the circuit-level implementation using both continuous-time and switched-capacitor techniques are described. Special attention is paid to the application of precision interfacing techniques, such as dynamic offset cancellation and dynamic element matching. A separate chapter is devoted to low-cost calibration techniques. Precision Temperature Sensors in CMOS Technology ends with a detailed description of three realized prototypes. The final prototype achieves an inaccuracy of only A0.1AC (3Sigma) over the temperature range of a "55AC to 125AC, which is the highest performance reported to date.

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