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Elasticsearch in Action
by Roy Russo Radu Gheorghe Matthew Lee HinmanSummaryElasticsearch in Action teaches you how to build scalable search applications using Elasticsearch. You'll ramp up fast, with an informative overview and an engaging introductory example. Within the first few chapters, you'll pick up the core concepts you need to implement basic searches and efficient indexing. With the fundamentals well in hand, you'll go on to gain an organized view of how to optimize your design. Perfect for developers and administrators building and managing search-oriented applications.Purchase of the print book includes a free eBook in PDF, Kindle, and ePub formats from Manning Publications.About the TechnologyModern search seems like magic—you type a few words and the search engine appears to know what you want. With the Elasticsearch real-time search and analytics engine, you can give your users this magical experience without having to do complex low-level programming or understand advanced data science algorithms. You just install it, tweak it, and get on with your work.About the BookElasticsearch in Action teaches you how to write applications that deliver professional quality search. As you read, you'll learn to add basic search features to any application, enhance search results with predictive analysis and relevancy ranking, and use saved data from prior searches to give users a custom experience. This practical book focuses on Elasticsearch's REST API via HTTP. Code snippets are written mostly in bash using cURL, so they're easily translatable to other languages.What's InsideWhat is a great search application?Building scalable search solutionsUsing Elasticsearch with any languageConfiguration and tuningAbout the ReaderFor developers and administrators building and managing search-oriented applications.About the AuthorsRadu Gheorghe is a search consultant and software engineer. Matthew Lee Hinman develops highly available, cloud-based systems. Roy Russo is a specialist in predictive analytics.Table of ContentsPART 1 CORE ELASTICSEARCH FUNCTIONALITYIntroducing ElasticsearchDiving into the functionalityIndexing, updating, and deleting dataSearching your dataAnalyzing your dataSearching with relevancyExploring your data with aggregationsRelations among documentsPART 2 ADVANCED ELASTICSEARCH FUNCTIONALITYScaling outImproving performanceAdministering your cluster
Elasticsearch in Action, Second Edition (In Action)
by Madhusudhan KondaBuild powerful, production-ready search applications using the incredible features of Elasticsearch.In Elasticsearch in Action, Second Edition you will discover: Architecture, concepts, and fundamentals of Elasticsearch Installing, configuring, and running Elasticsearch and Kibana Creating an index with custom settings Data types, mapping fundamentals, and templates Fundamentals of text analysis and working with text analyzers Indexing, deleting, and updating documents Indexing data in bulk, and reindexing and aliasing operations Learning search concepts, relevancy scores, and similarity algorithms Elasticsearch in Action, Second Edition teaches you to build scalable search applications using Elasticsearch. This completely new edition explores Elasticsearch fundamentals from the ground up. You&’ll deep dive into design principles, search architectures, and Elasticsearch&’s essential APIs. Every chapter is clearly illustrated with diagrams and hands-on examples. You&’ll even explore real-world use cases for full text search, data visualizations, and machine learning. Plus, its comprehensive nature means you&’ll keep coming back to the book as a handy reference! Foreword by Shay Banon. About the technology Create fully professional-grade search engines with Elasticsearch and Kibana! Rewritten for the latest version of Elasticsearch, this practical book explores Elasticsearch&’s high-level architecture, reveals infrastructure patterns, and walks through the search and analytics capabilities of numerous Elasticsearch APIs. About the book Elasticsearch in Action, Second Edition teaches you how to add modern search features to websites and applications using Elasticsearch 8. In it, you&’ll quickly progress from the basics of installation and configuring clusters, to indexing documents, advanced aggregations, and putting your servers into production. You&’ll especially appreciate the mix of technical detail with techniques for designing great search experiences. What's inside Understanding search architecture Full text and term-level search queries Analytics and aggregations High-level visualizations in Kibana Configure, scale, and tune clusters About the reader For application developers comfortable with scripting and command-line applications. About the author Madhusudhan Konda is a full-stack lead engineer, architect, mentor, and conference speaker. He delivers live online training on Elasticsearch and the Elastic Stack. Table of Contents 1 Overview 2 Getting started 3 Architecture 4 Mapping 5 Working with documents 6 Indexing operations 7 Text analysis 8 Introducing search 9 Term-level search 10 Full-text searches 11 Compound queries 12 Advanced search 13 Aggregations 14 Administration 15 Performance and troubleshooting
Elasticsearch: A Complete Guide
by Rafal Kuc Marek Rogozinski Saurabh Chhajed Bharvi DixitEnd-to-end Search and Analytics About This Book • Solve your data analytics problems with the Elastic Stack • Improve your user search experience with Elasticsearch and develop your own Elasticsearch plugins • Design your index, configure it, and distribute it — you'll also learn how it works Who This Book Is For This course is for anyone who wants to build efficient search and analytics applications. Some development experience is expected. What You Will Learn • Install and configure Elasticsearch, Logstash, and Kibana • Write CRUDE operations and other search functionalities using the Elasticsearch Python and Java Clients • Build analytics using aggregations • Set up and scale Elasticsearch clusters using best practices • Master document relationships and geospatial data • Build your own data pipeline using Elastic Stack • Choose the appropriate amount of shards and replicas for your deployment • Become familiar with the Elasticsearch APIs In Detail Elasticsearch is a modern, fast, distributed, scalable, fault tolerant, open source search and analytics engine. It provides a new level of control over how you can index and search even huge sets of data. This course will take you from the basics of Elasticsearch to using Elasticsearch in the Elastic Stack and in production. You'll start with the very basics: Elasticsearch terminology, installation, and configuring Elasticsearch. After this, you'll take a look at analytics and indexing, search, and querying. You'll learn how to create maps and visualizations. You'll also be briefed on cluster scaling, search and bulk operations, backups, and security. Then you'll be ready to get into Elasticsearch's internal functionalities including caches, Apache Lucene library, and its monitoring capabilities. You'll learn about the practical usage of Elasticsearch configuration parameters and how to use the monitoring API. You'll discover how to improve the user search experience, index distribution, segment statistics, merging, and more. Once you have mastered this, you'll dive into end-to-end visualize-analyze-log techniques with Elastic Stack (also known as the ELK stack). You'll explore Elasticsearch, Logstash, and Kibana and see how to make them work together to build fresh insights and business metrics out of data. You'll be able to use Elasticsearch with other de facto components in order to get the most out of Elasticsearch. By the end of this course, you'll have developed a full-fledged data pipeline. This Learning Path combines some of the best that Packt has to offer in one complete, curated package. It includes content from the following Packt products: • Elasticsearch Essentials • Mastering Elasticsearch, Second Edition • Learning ELK Stack Style and approach This course aims to create a smooth learning path that will teach you how to effectively use Elasticsearch with other de facto components and get the most out of Elasticsearch. Through this comprehensive course, you'll learn the basics of Elasticsearch and progress to using Elasticsearch in the Elastic stack and in production.
Elasticsearch: A Complete Guide
by Bharvi Dixit<P><P>End-to-end Search and Analytics <P><P>About This Book <P><P>Solve your data analytics problems with the Elastic Stack <P><P>Improve your user search experience with Elasticsearch and develop your own Elasticsearch plugins <P><P>Design your index, configure it, and distribute it — you'll also learn how it works <P><P>Who This Book Is For <P><P>This course is for anyone who wants to build efficient search and analytics applications. Some development experience is expected. <P><P>What You Will Learn <P><P>Install and configure Elasticsearch, Logstash, and Kibana <P><P>Write CRUDE operations and other search functionalities using the Elasticsearch Python and Java Clients <P><P>Build analytics using aggregations <P><P>Set up and scale Elasticsearch clusters using best practices <P><P>Master document relationships and geospatial data <P><P>Build your own data pipeline using Elastic Stack <P><P>Choose the appropriate amount of shards and replicas for your deployment <P><P>Become familiar with the Elasticsearch APIs <P><P>In Detail <P><P>Elasticsearch is a modern, fast, distributed, scalable, fault tolerant, open source search and analytics engine. It provides a new level of control over how you can index and search even huge sets of data. This course will take you from the basics of Elasticsearch to using Elasticsearch in the Elastic Stack and in production. <P><P>You'll start with the very basics: Elasticsearch terminology, installation, and configuring Elasticsearch. After this, you'll take a look at analytics and indexing, search, and querying. You'll learn how to create maps and visualizations. You'll also be briefed on cluster scaling, search and bulk operations, backups, and security. <P><P>Then you'll be ready to get into Elasticsearch's internal functionalities including caches, Apache Lucene library, and its monitoring capabilities. You'll learn about the practical usage of Elasticsearch configuration parameters and how to use the monitoring API. You'll discover how to improve the user search experience, index distribution, segment statistics, merging, and more. <P><P>Once you have mastered this, you'll dive into end-to-end visualize-analyze-log techniques with Elastic Stack (also known as the ELK stack). You'll explore Elasticsearch, Logstash, and Kibana and see how to make them work together to build fresh insights and business metrics out of data. You'll be able to use Elasticsearch with other de facto components in order to get the most out of Elasticsearch. By the end of this course, you'll have developed a full-fledged data pipeline. <P><P>This Learning Path combines some of the best that Packt has to offer in one complete, curated package. It includes content from the following Packt products: <P><P>Elasticsearch Essentials <P><P>Mastering Elasticsearch, Second Edition <P><P>Learning ELK Stack <P><P>Style and approach <P><P>This course aims to create a smooth learning path that will teach you how to effectively use Elasticsearch with other de facto components and get the most out of Elasticsearch. Through this comprehensive course, you'll learn the basics of Elasticsearch and progress to using Elasticsearch in the Elastic stack and in production.
Elasticsearch: A Distributed Real-Time Search and Analytics Engine
by Clinton Gormley Zachary TongWhether you need full-text search or real-time analytics of structured data—or both—the Elasticsearch distributed search engine is an ideal way to put your data to work. This practical guide not only shows you how to search, analyze, and explore data with Elasticsearch, but also helps you deal with the complexities of human language, geolocation, and relationships.If you’re a newcomer to both search and distributed systems, you’ll quickly learn how to integrate Elasticsearch into your application. More experienced users will pick up lots of advanced techniques. Throughout the book, you’ll follow a problem-based approach to learn why, when, and how to use Elasticsearch features.Understand how Elasticsearch interprets data in your documentsIndex and query your data to take advantage of search concepts such as relevance and word proximityHandle human language through the effective use of analyzers and queriesSummarize and group data to show overall trends, with aggregations and analyticsUse geo-points and geo-shapes—Elasticsearch’s approaches to geolocationModel your data to take advantage of Elasticsearch’s horizontal scalabilityLearn how to configure and monitor your cluster in production
Elastix Unified Communications Server Cookbook
by Gerardo Barajas PuenteThis book is aimed at those who want to learn how to set up an Elastix Unified Communications Server without losing ground on Unified Communications and Voice over IP.
Election Posters Around the Globe
by Christina Holtz-Bacha Bengt JohanssonThis book examines the history and role of election posters as one of the most crucial forms of political communication, especially in electoral campaigns, in a number of countries around the globe. The contributing authors present comparative research on electoral posters from countries from all five continents, summarizing international similarities and national differences. The book also discusses theoretical aspects and different methodological approaches that are used for studying the design, content and reception of election posters as a means of political communication.
Electoral Campaigns, Media, and the New World of Digital Politics
by Richard Davis David TarasToday, political leaders and candidates for office must campaign in a multimedia world through traditional forums—newspapers, radio, and television—as well as new digital media, particularly social media. Electoral Campaigns, Media, and the New World of Digital Politics chronicles how Twitter, Facebook, Reddit, email, and memes are used successfully and unsuccessfully to influence elections. Each of these platforms have different affordances and reach various audiences in different ways. Campaigns often have to wage different campaigns on each of these mediums. In some instances, they are crucial in altering coverage in the mainstream media. In others, digital media remains underutilized and undeveloped. As has always been the case in politics, outcomes that depend on economic and social conditions often dictate people’s readiness for certain messages. However, the method and content of those messages has changed with great consequences for the health and future of democracy. This book answers several questions: How do candidates/parties reach audiences that are preoccupied, inattentive, amorphous, and bombarded with so many other messages? How do they cope with the speed of media reporting in a continuous news cycle that demands instantaneous responses? How has media fragmentation altered the campaign styles and content of campaign communication, and general campaign discourse? Finally and most critically, what does this mean for how democracies function?
Electric Mobility and Hybrid Microgrid: Proceedings of Conference on Smart Grid Energy Systems and Control, SGESC 2023 (Lecture Notes in Electrical Engineering #1230)
by Rajesh Kumar Ratna Dahiya ShivamThe book contains selected proceedings from the International Conference on Smart Grid Energy Systems and Control (SGESC 2023). It is divided into 2 volumes and focuses on Electric Mobility and Hybrid Microgrid. The topics covered include power electronics for hybrid and electric vehicles, wireless power transfer, renewable power generation, energy storage, and challenges in grid integration of microgrids. This book is a valuable resource for academic researchers and industry practitioners.
Electrical Control and Quantum Chaos with a High-Spin Nucleus in Silicon (Springer Theses)
by Serwan AsaadNuclear spins are highly coherent quantum objects that were featured in early ideas and demonstrations of quantum information processing. In silicon, the high-fidelity coherent control of a single phosphorus (31-P) nuclear spin I=1/2 has demonstrated record-breaking coherence times, entanglement, and weak measurements. In this thesis, we demonstrate the coherent quantum control of a single antimony (123-Sb) donor atom, whose higher nuclear spin I = 7/2 corresponds to eight nuclear spin states. However, rather than conventional nuclear magnetic resonance (NMR), we employ nuclear electric resonance (NER) to drive nuclear spin transitions using localized electric fields produced within a silicon nanoelectronic device. This method exploits an idea first proposed in 1961 but never realized experimentally with a single nucleus, nor in a non-polar crystal such as silicon. We then present a realistic proposal to construct a chaotic driven top from the nuclear spin of 123-Sb. Signatures of chaos are expected to arise for experimentally realizable parameters of the system, allowing the study of the relation between quantum decoherence and classical chaos, and the observation of dynamical tunneling. These results show that high-spin quadrupolar nuclei could be deployed as chaotic models, strain sensors, hybrid spin-mechanical quantum systems, and quantum-computing elements using all-electrical controls.
Electrical Engineering and Applied Computing
by Sio-Iong Ao Len GelmanA large international conference in Electrical Engineering and Applied Computing was just held in London, 30 June - 2 July, 2010. This volume will contain revised and extended research articles written by prominent researchers participating in the conference. Topics covered include Control Engineering, Network Management, Wireless Networks, Biotechnology, Signal Processing, Computational Intelligence, Data Mining, Computational Statistics, Internet Computing, High Performance Computing, and industrial applications. The book will offer the states of arts of tremendous advances in electrical engineering and applied computing and also serve as an excellent reference work for researchers and graduate students working on electrical engineering and applied computing
Electrical Engineering and Intelligent Systems
by Sio-Iong Ao Len GelmanThe revised and extended papers collected in this volume represent the cutting-edge of research at the nexus of electrical engineering and intelligent systems. They were selected from well over 1000 papers submitted to the high-profile international World Congress on Engineering held in London in July 2011. The chapters cover material across the full spectrum of work in the field, including computational intelligence, control engineering, network management, and wireless networks. Readers will also find substantive papers on signal processing, Internet computing, high performance computing, and industrial applications. The Electrical Engineering and Intelligent Systems conference, as part of the 2011 World Congress on Engineering was organized under the auspices of the non-profit International Association of Engineers (IAENG). With more than 30 nations represented on the conference committees alone, the Congress features the best and brightest scientific minds from a multitude of disciplines related to engineering. These peer-reviewed papers demonstrate the huge strides currently being taken in this rapidly developing field and reflect the excitement of those at the frontiers of this research.
Electrical Machines and Their Applications
by Ali Mehrizi-SaniThis popular, easy-to-read book offers a comprehensive yet unique treatment of electrical machines and their historical development. Electrical Machines and Their Applications, Third Edition covers an in-depth analysis of machines augmented with ample examples, which makes it suitable for both those who are new to electric machines and for those who want to deepen their knowledge of electric machines. This book provides a thorough discussion of electrical machines. It starts by reviewing the basics of concepts needed to fully understand the machines, e.g., three-phase circuits and fundamentals of energy conversion, and continues to discuss transformers, induction machines, synchronous machines, dc machines, and other special machines and their dynamics. This natural progression creates a unifying theme and helps the reader appreciate how the same physical laws of energy conversion govern the operation and dynamics of different machine types. The text is sprinkled with ample examples to further solidify the discussed concepts. Several well-placed appendices make the book self-contained and even easier to follow. This book is part of a series on power system topics originally authored by the late Turan Gönen. The book has been edited by Ali Mehrizi-Sani to bring it up to date while maintaining its original charm. Both new and seasoned readers for Gönen’s books will find this new edition a much-awaited update to the second edition.
Electrical Machines with MATLAB
by Turan GonenElectrical Machines with MATLAB encapsulates the invaluable insight and experience that eminent instructor Turan Gonen has acquired in almost 40 years of teaching. With simple, versatile content that separates it from other texts on electrical machines, this book is an ideal self-study tool for advanced students in electrical and other areas of eng
Electrical Power Unit Commitment
by Panos M. Pardalos Qipeng P. Zheng Yuping HuangThis entry into the SpringerBriefs in Energy series offers a systematic review of unit commitment (UC) problems in electrical power generation. This book updates texts written in the late 1990s and early 2000s by including both basics of UC models and state-of-the-art models and solution algorithms, where stochastic models and mixed integer programming techniques are emphasized The UC problems are mostly formulated as mixed integer linear programs, although there are many variants. Some of the varieties of algorithms have been developed for or applied to UC problems include dynamic programming, Lagrangian relaxation, general mixed integer programming algorithms, and Benders decomposition. This book also discusses the recent trends in solving UC problems, especially stochastic programming models, and advanced techniques to handle large numbers of integer decision variables due to scenario propagation.
Electricity Markets and Power System Economics
by Deqiang Gan Donghan Feng Jun XieAfter the first power plant in history was commissioned for commercial operation by Thomas Edison on Pearl Street in New York in 1882, electricity was sold as a consumer product at market prices. After a period of rapid development, electricity had become such a fundamental product that regulation was believed to be necessary. Since then, the power
Electricity Markets with Increasing Levels of Renewable Generation: Structure, Operation, Agent-based Simulation, and Emerging Designs
by Fernando Lopes Helder CoelhoThis book describes the common ground between electricity markets (EMs) and software agents (or artificial intelligence generally). It presents an up-to-date introduction to EMs and intelligent agents, and offers a comprehensive description of the research advances and key achievements related to existing and emerging market designs to reliably and efficiently manage the potential challenges of variable generation (VG). Most EMs are unique in their complex relationships between economics and the physics of energy, but were created without the notion that large penetrations of variable generation (VG) would be part of the supply mix. An advanced multi-agent approach simulates the behavior of power markets over time, particularly markets with large-scale penetrations of renewable resources. It is intended as a reference book for researchers, academics and industry practitioners, but given the scope of the chapters and the highly accessible style, the book also provides a coherent foundation for several different graduate courses.
Electro-optic Modulation for Photonic Networks: Precise and high-speed control of lightwaves (Textbooks in Telecommunication Engineering)
by Tetsuya KawanishiThis textbook provides comprehensive and detailed information on electro-optic modulation, which plays important roles in lightwave networks including optical fiber links, visible ray communications, fiber-wireless, etc. The first part of this book describes roles and basic functions of optical modulators as well as various modulation schemes. The second part is on mathematical expressions dedicated to optical modulation, where sideband generation are clearly described. In conclusion, this book provides useful information for device and system technologies, and helps in understanding fundamental issues on telecommunication systems as well as electro-optic devices. Contents in this book provide valuable information for engineering students in telecommunications. It also gives useful examples of applied mathematics using Bessel functions. It is ideal for upper undergraduate and graduate level classes.Provides comprehensive mathematical expressions dedicated to optical phase modulation based electro-optic effect;Presents practical knowledge of optical modulators as well as basic theory on modulator operation;Includes classroom materials including software and PowerPoint slides for easy integration into curriculum.
Electrochemical Cell Calculations with OpenFOAM (Lecture Notes in Energy #42)
by Steven Beale Werner LehnertThis unique book is at the nexus of modern software programming practices and electrochemical process engineering. It is the authoritative text on developing open source software for many applications, including:• fuel cells;• electrolyzers; and• batteries.Written by experts in the field in the open source computational fluid dynamics (CFD) code suite OpenFOAM, this book is intended for process engineering professionals developing practical electrochemical designs for industry, as well as researchers focused on finding tomorrow’s answers today. The book covers everything from micro-scale to cell-scale to stack-scale models, with numerous illustrations and programming examples. Starting from a clear explanation of electrochemical processes and simple illustrative examples, the book progresses in complexity through a range of diverse applications. After reading this book, the reader is able to take command and control of model development as an expert. The book is aimed at all engineers and scientists with basic knowledge of calculus and programming in C++.
Electromagnetic Compatibility: Methods, Analysis, Circuits, and Measurement, Third Edition
by David A. WestonRevised, updated, and expanded, Electromagnetic Compatibility: Methods, Analysis, Circuits, and Measurement, Third Edition provides comprehensive practical coverage of the design, problem solving, and testing of electromagnetic compatibility (EMC) in electrical and electronic equipment and systems. This new edition provides novel information on theory, applications, evaluations, electromagnetic computational programs, and prediction techniques available. With sixty-nine schematics providing examples for circuit level electromagnetic interference (EMI) hardening and cost effective EMI problem solving, this book also includes 1130 illustrations and tables. Including extensive data on components and their correct implementation, the myths, misapplication, misconceptions, and fallacies that are common when discussing EMC/EMI will also be addressed and corrected.
Electromagnetic Compatibility: Principles and Applications, Second Edition, Revised and Expanded (Electrical and Computer Engineering #Vol. 73)
by David WestonThis totally revised and expanded reference/text provides comprehensive, single-source coverage of the design, problem solving, and specifications of electromagnetic compatibility (EMC) into electrical equipment/systems-including new information on basic theories, applications, evaluations, prediction techniques, and practical diagnostic options for preventing EMI through cost-effective solutions.Offers the most recent guidelines, safety limits, and standards for human exposure to electromagnetic fields!Containing updated data on EMI diagnostic verification measurements, as well as over 900 drawings, photographs, tables, and equations-500 more than the previous edition-Electromagnetic Compatibility: Principles and Applications, Second Edition:
Electromagnetic Fields and Waves: Microwave and mmWave Engineering with Generalized Macroscopic Electrodynamics (Textbooks in Telecommunication Engineering)
by Sergey M. Smolskiy Eugene I. NefyodovThis textbook is intended for a course in electromagnetism for upper undergraduate and graduate students. The main concepts and laws of classical macroscopic electrodynamics and initial information about generalized laws of modern electromagnetics are discussed, explaining some paradoxes of the modern theory. The reader then gets acquainted with electrodynamics methods of field analysis on the basis of wave equation solution. Emission physics are considered using an example of the Huygens-Fresnel-Kirchhoff canonic principle. The representation about strict electrodynamics task statement on the base of Maxwell equations, boundary conditions, emission conditions and the condition on the edge is given. Different classes of approximate boundary conditions are presented, which essentially simplify understanding of process physics. The canonic Fresnel functions are given and their generalization on the case of anisotropic impedance. The free waves in closed waveguides and in strip-slotted and edge-dielectric transmission lines are described. A large number of Mathcad programs for illustration of field patterns and its properties in different guiding structures are provided. The material is organized for self-study as well as classroom use.
Electromagnetic Information Leakage and Countermeasure Technique: Translated by Liu Jinming, Liu Ying, Zhang Zidong, Liu Tao
by Taikang Liu Yongmei LiThis book presents a model of electromagnetic (EM) information leakage based on electromagnetic and information theory. It discusses anti-leakage, anti-interception and anti-reconstruction technologies from the perspectives of both computer science and electrical engineering. In the next five years, the threat posed by EM information leakage will only become greater, and the demand for protection will correspondingly increase. The book systematically introduces readers to the theory of EM information leakage and the latest technologies and measures designed to counter it, and puts forward an EM information leakage model that has established the foundation for new research in this area, paving the way for new technologies to counter EM information leakage. As such, it offers a valuable reference guide for all researchers and engineers involved in EM information leakage and countermeasures.
Electromagnetic Sources and Electromagnetic Fields (Modern Antenna)
by Gaobiao XiaoThis book presents a modified spherical harmonic expansion method in which the electromagnetic fields and their sources are expanded with the same set of spherical vector basis functions in a similar procedure. Explicit expressions for the electromagnetic fields, potentials, energies, and the related Green’s functions are derived for the spherical modes in both frequency domain and time domain. Based on the formulation, the relationships between the electromagnetic sources, the electromagnetic far fields, and the electromagnetic near fields are clearly revealed. In particular, a nonuniform transmission line model is developed for intuitively characterizing the total radiation process. The introduction of the cutoff radius and the cutoff mode degree provides a simple reference for determining the numbers of degrees of freedom of the fields associated with sources in a bounded region. Based on the theory, an efficient hybrid method for synthesizing antenna arrays with complex footprints is proposed and demonstrated with several numerical examples. Effective algorithms are also developed for reconstructing the radiating part of the current sources.This book is intended for researchers, engineers, and graduate students who are interested in studying the energy transfer in electromagnetic radiation, synthesis and measurement of antenna arrays, and applications of inverse electromagnetic source problems.
Electromagnetics and Network Theory and their Microwave Technology Applications
by Robert Weigel Stefan LindenmeierThis volume provides a discussion of the challenges and perspectives of electromagnetics and network theory and their microwave applications in all aspects. It collects the most interesting contribution of the symposium dedicated to Professor Peter Russer held in October 2009 in Munich.