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Additive Manufacturing for Biocomposites and Synthetic Composites

by M. T. Mastura S. M. Sapuan R. A. Ilyas

Additive Manufacturing for Biocomposites and Synthetic Composites focuses on processes, engineering, and product design applications of bio-composites and synthetic composites in additive manufacturing (AM). It discusses the preparation and material characterization and selection, as well as future opportunities and challenges. Reviews the latest research on the development of composites for AM and the preparation of composite feedstocks Offers an analytical and statistical approach for the selection of composites for AM, including characterization of material properties Emphasizes the use of environmentally friendly composites Analyzes the lifecycle including costs Considers potential new fibers, their selection, and future applications This book provides a comprehensive overview of the application of advanced composite materials in AM and is aimed at researchers, engineers, and advanced students in materials and manufacturing engineering and related disciplines.

Additive Manufacturing Classification (Synthesis Lectures on Engineering, Science, and Technology)

by Sanjay Kumar

Additive manufacturing classification is one of the biggest issues faced by AM community. The book provides a comprehensive classification of AM, which can be useful to anyone working in any area of manufacturing. As the classification depends on the interrelation of various AM processes, the book provides concise and critical information of those processes, which can be helpful to anyone looking for a concise book on AM. The book provides original information unavailable in research papers.

Additive Manufacturing: Materials, Functionalities and Applications

by Kun Zhou

This book focuses on the advances of additive manufacturing in the applications of wearable electronics, energy storage, biomedical implants and devices, drug delivery, and technologies for 4D printing, large-scale printing, and ceramics printing. It provides timely insights into the materials, functionalities, and applications of additive manufacturing.

Additive Fertigung für Chemiewissenschaften und Chemieingenieurwesen

by Seeram Ramakrishna Suresh K. Bhargava Milan Brandt Pr. Selvakannan

Dieses Buch ist speziell für Forscher sowie Lehrende konzipiert, die einen Fortgeschrittenen-Fertigungs-Kurs in ihren Klassen unterrichten oder einführen. Es präsentiert den aktuellen Forschungsstand in diesem Forschungsbereich und die bisher identifizierten Hauptprobleme für die Integration der additiven Fertigung in chemische Prozesse. Die einzigartige Fähigkeit, Materialien mithilfe aufkommender additiver Fertigungstechnologien in funktionale Bauteile mit spezifischer Geometrie zu verwandeln, hat in Biologie, Ingenieurwissenschaften und Materialwissenschaften erhebliches Interesse geweckt, um maßgeschneiderte Designs für spezifische Anwendungen zu erstellen. Die Anwendungen dieses aufstrebenden Fertigungsverfahren im Bereich der chemischen Wissenschaften und des Ingenieurwesens sind im Anfangssdtadium. Daher liegt der Hauptfokus dieses Buches darauf, die grundlegenden Prinzipien der additiven Fertigungsverfahren sowie den Einsatz in konventionelle chemische Prozesse und verschiedeneVerfahrenstechniken einzuführen. Der potenzielle Vorteil der Anwendung dieser additiven Fertigungstechnologien besteht darin, großtechnisch chemische Prozesse herunterzuskalieren, was mehrere Vorteile bietet, darunter eine geringere Flächenbedarf, Abfallreduktion, effiziente Wärmeintegration und dezentrale chemische Fertigung. Was ist Additive Fertigung? Additive Fertigung (engl.: additive manufacturing, AM) – weitgehend auch als 3D-Druck bezeichnet – ist ein aufstrebendes und innovatives Fertigungsverfahren, das sich grundlegend von konventionellen Herstellungsprozessen unterscheidet und der Forschung und Industrie zu völlig neuen Möglichkeiten verhilft. Bauteile werden Schicht für Schicht aufgebaut und entstehen nicht wie bei herkömmlichen Verfahren durch Abtrag von Material (zum Beispiel durch fräsende Bearbeitung). Dadurch ergibt sich eine enorme Flexibilität und Designfreiheit beispielsweise bei der Herstellung von Prototypen und auch zunehmend in der Serienfertigung. Die Zukunft der additiven Fertigung Die additive Fertigung zählt zu den starken Wachstumsfeldern innerhalb der Produktion. Führende Marktberichte sagen ein durchschnittliches jährliches Wachstum von ca. 20 Prozent für die nächsten fünf Jahre voraus. Das Fraunhofer IGCV geht dabei davon aus, dass dieses Branchenwachstum der additiven Fertigung nicht nur in einem spezifischen Industriezweig zu beobachten sein wird. Vielmehr ist davon auszugehen, dass in allen Industriezweigen der Einsatz additiver Fertigungsverfahren zunehmen wird. Im Jahr 2022 wurden zur Zukunft der additiven Fertigung zwei Studien (An Additive Manufacturing Breakthrough & The Futures of Metal Additive Manufacturing 2030) veröffentlicht, bei denen das Fraunhofer IGCV Zuarbeiten geleistet hat. Die additive Fertigung zählt zu den starken Wachstumsfeldern innerhalb der Produktion. Führende Marktberichte sagen ein durchschnittliches jährliches Wachstum von ca. 20 Prozent für die nächsten fünf Jahre voraus. Das Fraunhofer IGCV geht dabei davon aus, dass dieses Branchenwachstum der additiven Fertigung nicht nur in einem spezifischen Industriezweig zu beobachten sein wird. Vielmehr ist davon auszugehen, dass in allen Industriezweigen der Einsatz additiver Fertigungsverfahren zunehmen wird. Im Jahr 2022 wurden zur Zukunft der additiven Fertigung zwei Studien (An Additive Manufacturing Breakthrough & The Futures of Metal Additive Manufacturing 2030) veröffentlicht, bei denen das Fraunhofer IGCV Zuarbeiten geleistet hat.

Additive and Subtractive Manufacturing of Composites (Springer Series in Advanced Manufacturing)

by Sanjay Mavinkere Rangappa Munish Kumar Gupta Suchart Siengchin Qinghua Song

This book describes crucial aspects related to the additive and subtractive manufacturing of different composites. The first half of this book mainly deals with the various types of composite fabrication methods along with the introduction, features and mechanisms and also the processing of composite materials via additive manufacturing route. Also, the thermal, mechanical, physical and chemical properties relevant to the processing of composite materials are included in the chapters. The second half of this book primarily demonstrates an extensive section on the different types of additive manufacturing processes like selective laser sintering, selective laser melting, stereolithography, fused deposition modeling and material jetting used to fabricate the metals and polymers. Also, the chapters address the complete description of fabrication processes for metal matrix composites and polymer matrix composites. Moreover, the different methods adopted such as short peening, micro-machining, heat-treatment and solution treatment to improve the surface improvement are well discussed. This book gives many helps to researchers and students in the fields of the additive and subtractive manufacturing of different composites.

Addition Reactions with Unsaturated Hydrocarbons

by Ruimao Hua

Addition Reactions with Unsaturated Hydrocarbons Provides comprehensive coverage of the atom-economic approach to functionalized molecules using unsaturated hydrocarbons as starting materials Unsaturated hydrocarbons have emerged as an important class of fundamental starting materials in organic synthesis. Synthetic methodologies incorporating unsaturated hydrocarbons continue to expand due to their numerous applications in the synthesis of a vast array of chemicals. Addition Reactions with Unsaturated Hydrocarbons presents an up-to-date overview of modern methods that utilize reactions of unsaturated hydrocarbons as building blocks of organic synthesis, covering the conceptual and practical knowledge required for designing atom-efficient reactions to synthesize functionalized molecules. This authoritative volume discusses homo-dimerization and cross-dimerization of alkynes and/or alkenes, synthesis of carbonyl compounds from the hydration of alkynes, cycloadditions of alkynes and alkenes for the synthesis of carbocycles and heterocycles, double functionalization of alkynes and alkenes by addition reactions of element-element bonds, and more. Summarizes the most recent developments in the reactions of unsaturated hydrocarbons Features more than 600 schemes describing typical reactions starting from unsaturated hydrocarbons Covers topics such as alkynylated reactions, addition and cycloaddition reactions of alkynes and alkenes, and carbonylation of alkynes and alkenes with carbon monoxide Includes examples of synthesis procedures of natural products involving alkyne transformation With comprehensive coverage of important reactions of unsaturated hydrocarbons, Addition Reactions with Unsaturated Hydrocarbons is a valuable resource for organic chemists, pharmaceutical chemists, and biochemists in both academia and industry as well as an excellent reference text for graduate students in relevant areas of chemistry.

Addison-Wesley Science

by Addison-Wesley Publishing Company

"This book has been made to help you learn science. It has many features to make learning science exciting. It will answer some questions you have and probably start you thinking about some new ones. Explore your book. See what features you can find. To make the most of Addison-Wesley Science, take some time to learn how it is organized. That will make science easier to understand. Find the table of contents. Notice that this book is divided into four units. Each unit focuses on a certain kind of science: life, physical, earth, or health science. Each unit consists of several chapters. Each chapter is made up of a few lessons."

Addison-Wesley Chemistry

by Arthur N. Applebee Andrea B. Berrnúdez Sheridan Blau Rebekah Caplan Peter Elbow Susan Hynds Judith A. Langer James Marshall

A definitive Chemistry book which covers among others: matter and change, scientific measurement, atomic structure, chemical names and formulas.

Addison-Wesley Chemistry

by Antony C. Wilbraham Dennis D. Staley Michael S. Matta

Chemistry is the study of the composition of substances and the changes they undergo. The world is complex. Chemistry reflects this complexity in the broad areas it covers. Chemistry contributes to other natural sciences, including biology geology, and physics.

Addison-Wesley Chemistry

by Antony C. Wilbraham Dennis D. Staley Michael S. Matta Edward L. Waterman

Addison-Wesley Chemistry is a comprehensive and motivating program that builds problem-solving skills and stresses the relevance and application of chemistry to the present and future life of students.

Addison Addley and the Things That Aren't There (Orca Young Readers)

by Melody DeFields McMillan

Addison Addley hates math. He hates public speaking too. Actually, he hates anything that involves work, but he only has a couple of weeks to write and memorize his grade five speech. The problem is, he can't think of a single topic. When he finally comes up with an excellent idea for a speech, it almost writes itself, but it's his poor math skills that make speech day unforgettable.

Adding Neurotherapy to Your Practice: Clinician’s Guide to the ClinicalQ, Neurofeedback, and Braindriving

by Paul G. Swingle

This clinical manual argues for using neurotherapy to enhance mental health and medical practice across settings and specialties. The text takes readers through the tools and methods of neurotherapy: the ClinicalQ for intake assessment, a stimulated EEG modality called braindriving, and neurofeedback protocols to retrain brain function. Case studies demonstrate neurotherapy as an efficient component in treating brain-related and mind/body conditions and symptoms, from ADHD, sleep disturbances, and depression to fibromyalgia and seizures. Its methods allow clinicians to find deviations in brain function that fall through the diagnostic cracks and choose therapeutic interventions best suited to clients based on reliable data. Included in the coverage: Treating the condition instead of the diagnosis. Case examples illustrating how to conduct the ClinicalQ, interpret results, and convey them to clients. Sample protocols of braindriving and neurofeedback. Using therapeutic harmonics to advance neurotherapy. Age-appropriate neurotherapy for children and seniors. Brainwave diagrams, data tables, client forms, and other helpful tools and visuals. Adding Neurotherapy to Your Practice will interest psychologists, physicians, psychiatrists, chiropractors, and social workers. This stimulating presentation emphasizes the individuality of every client, and the abundant healing capacity of the brain.

The Addiction Solution: Unraveling the Mysteries of Addiction through Cutting-Edge Brain Science

by David Kipper Steven Whitney

A revolutionary and empowering paradigm in treating addiction based on groundbreaking new science.For decades addiction has been viewed and treated as a social and behavioral illness, afflicting people of "weak" character and "bad" moral fiber. However, recent breakthroughs in genetic technology have enabled doctors, for the first time, to correctly diagnose the disease and prove that addiction is an inherited, neuro-chemical disease originating in brain chemistry, determined by genetics, and triggered by stress.In their groundbreaking The Addiction Solution, David Kipper, MD, and Steven Whitney distill these exciting findings into a guide for the millions of adults who want to be free from the cycle of addiction, and for their loved ones who want to better understand it and to help. It draws on composite case histories to illustrate how the innovative Personal Recovery Program works by customizing treatment for a diverse group of addicts abusing a wide variety of different substances—from the first day of treatment to its successful resolution. The result is a complete guide to a world made brand-new by this enormous paradigm shift in the treatment of addiction.

Addiction Recovery Management: Theory, Research and Practice (Current Clinical Psychiatry)

by John F. Kelly William L. White

Addiction Recovery Management: Theory, Research, and Practice is the first book on the recovery management approach to addiction treatment and post-treatment support services. Distinctive in combining theory, research, and practice within the same text, this ground-breaking title includes authors who are the major theoreticians, researchers, systems administrators, clinicians and recovery advocates who have developed the model. State-of-the art and the definitive text on the topic, Addiction Recovery Management: Theory, Research, and Practice is mandatory reading for clinicians and all professionals who work with patients in recovery or who are interested in the field.

Addiction as Consumer Choice: Exploring the Cognitive Dimension (Routledge Studies in Marketing)

by Gordon Foxall

A striking characteristic of addictive behavior is the pursuit of immediate reward at the risk of longer-term detrimental outcomes. It is typically accompanied by the expression of a strong desire to cease from or at least control consumption that has such consequences, followed by lapse, further resolution, relapse, and so on. Understood in this way, addiction includes substance abuse as well as behavioral compulsions like excessive gambling or even uncontrollable shopping. Behavioral economics and neurophysiology provide well-worn paths to understanding this behavior and this book regards them as central components of this quest. However, the specific question it seeks to answer is, What part does cognition – the desires we pursue and the beliefs we have about how to accomplish them – play in explaining addictive behavior? The answer is sought in a methodology that indicates why and where cognitive explanation is necessary, the form it should take, and the outcomes of employing it to understand addiction. It applies the Behavioral Perspective Model (BPM) of consumer choice, a tried and tested theory of more routine consumption, ranging from everyday product and brand choice, through credit purchasing and environmental despoliation, to the more extreme aspects of consumption represented by compulsion and addiction. The book will advance debate among behavioral scientists, cognitive psychologists, and other professionals about the nature of economic and social behavior.

Addiction and Brain Damage (Routledge Library Editions: Addictions #3)

by Derek Richter

Originally published in 1980, recent research had produced new insights into how, at the biochemical level, alcohol and other drugs of abuse can impair metabolic and neuropsychiatric functions. Epidemiological studies were also demonstrating that even moderate drinking or drug abuse can produce significant brain damage. This book draws together the latest biochemical, physiological and clinical research on these topics at the time. The initial chapters discuss how alcohol can interfere with various functions: the adaptability of metabolic processes as governed by the ability of the liver to synthesise new enzymes, cell membrane transport, nervous transmission and the transport of nutrients into the brain. It is suggested that opiates, and possibly alcohol, may affect the endorphin system by blocking the uptake of specific amino acids. The second half of the book reports clinical investigations using biochemical studies, psychological tests, EEG investigations and Computerised Axial Tomography (CAT) scanning. It gives the first report of a long-term study by Lishman and co-workers using an improved tomography technique to assess brain damage in alcoholics. These studies give convincing evidence that heavy drinking, even at socially-acceptable levels, can cause serious brain damage in vulnerable people.

Adaptogens: Harness the power of superherbs to reduce stress & restore calm

by Paula Grainger

Increasing numbers of people are suffering from stress, anxiety and fatigue caused by lack of sleep, digital overload and our 24/7 lifestyle. In Adaptogens, Medical Herbalist Paula Grainger provides an answer to this modern-day affliction by introducing us to the group of powerful herbal ingredients known as adaptogens..Adaptogens, such as Ashwagandha, Maca, Korean ginseng, Turmeric, Reishi mushrooms, Liquorice, Rosemary and Rhodiola, have been scientifically proven to lower levels of the stress hormone cortisol and prevent adrenal imbalances that can lead to adrenal fatigue and 'burn-out'. Delve into the history and science of these miraculous plants and learn how to maximize wellness using the most easy-to-source adaptogens, incorporating them into your life via delicious smoothies, energy bites and desserts, invigorating teas, tonics and lattes, and wonderful beauty elixirs.

Adaptogens: Harness the power of superherbs to reduce stress & restore calm

by Paula Grainger

Increasing numbers of people are suffering from stress, anxiety and fatigue caused by lack of sleep, digital overload and our 24/7 lifestyle. In Adaptogens, Medical Herbalist Paula Grainger provides an answer to this modern-day affliction by introducing us to the group of powerful herbal ingredients known as adaptogens..Adaptogens, such as Ashwagandha, Maca, Korean ginseng, Turmeric, Reishi mushrooms, Liquorice, Rosemary and Rhodiola, have been scientifically proven to lower levels of the stress hormone cortisol and prevent adrenal imbalances that can lead to adrenal fatigue and 'burn-out'. Delve into the history and science of these miraculous plants and learn how to maximize wellness using the most easy-to-source adaptogens, incorporating them into your life via delicious smoothies, energy bites and desserts, invigorating teas, tonics and lattes, and wonderful beauty elixirs.

Adaptive Water Management: Concepts, Principles and Applications for Sustainable Development (International Series in Operations Research & Management Science #258)

by Farideh Delavari Edalat M. Reza Abdi

This book explores a new framework of Adaptive Water Management (AWM) for evaluating existing approaches in urban water management. It highlights the need to adopt multidisciplinary strategies in water management while providing an in-depth understanding of institutional interactions amongst different water related sectors. The key characteristics of AWM i. e. polycentric governance, organisational flexibility and public participation are investigated and described through a critical review of the relevant literature. The book presents an empirical case study undertaken in a selected developing-country city to investigate the potential gaps between the current water management approaches and possible implementation of AWM. Feasibility of AWM operations is examined in an environment surrounded by established water management structure with centralised governance and an institutional process based on technical flexibility. The key elements of AWM performance are (re)structured and transformed into decision support systems. Multi criteria decision models are developed to facilitate quantification and visualization of the elements derived from the case study, which is involved with water companies and water consumers. The book describes how the concept of AWM, along with structuring suitable decision support systems, can be developed and applied to developing-country cities. The book highlights the barriers for applying the AWM strategies that include established centralised decision making, bureaucratic interactions with external organisations, lack of organisational flexibility within the institutions, and lack of recognition of public role in water management. The findings outline that despite the lack of adaptability in the current water management in the case study, as an example of developing countries, there are positive attitudes among water professionals and the public towards adaptability through public-institutional participation. /p>

Adaptive Thermal Comfort of Indoor Environment for Residential Buildings: Efficient Strategy for Saving Energy (SpringerBriefs in Architectural Design and Technology)

by David Bienvenido-Huertas Carlos Rubio-Bellido

This book is structured in four parts: First, it analyzes the sustainability objectives established for the building stock and the importance of thermal comfort in this aspect. Second, the existing adaptive thermal comfort models and the main energy-saving measures associated with these models are analyzed. Third, the energy savings obtained with these measures are analyzed in several case studies, comparing the results obtained with other energy conservation measures, such as the improvement of the façade. The analysis is carried out from an energy and economic perspective. Finally, a decision‐making process based on fuzzy logic is established. As an expected result, the content of the book contributes to assist architects in designing more efficient buildings from the perspective of user behavior.

Adaptive Strategies for Water Heritage: Past, Present and Future

by Carola Hein

This Open Access book, building on research initiated by scholars from the Leiden-Delft-Erasmus Centre for Global Heritage and Development (CHGD) and ICOMOS Netherlands, presents multidisciplinary research that connects water to heritage. Through twenty-one chapters it explores landscapes, cities, engineering structures and buildings from around the world. It describes how people have actively shaped the course, form and function of water for human settlement and the development of civilizations, establishing socio-economic structures, policies and cultures; a rich world of narratives, laws and practices; and an extensive network of infrastructure, buildings and urban form. The book is organized in five thematic sections that link practices of the past to the design of the present and visions of the future: part I discusses drinking water management; part II addresses water use in agriculture; part III explores water management for land reclamation and defense; part IV examines river and coastal planning; and part V focuses on port cities and waterfront regeneration. Today, the many complex systems of the past are necessarily the basis for new systems that both preserve the past and manage water today: policy makers and designers can work together to recognize and build on the traditional knowledge and skills that old structure embody. This book argues that there is a need for a common agenda and an integrated policy that addresses the preservation, transformation and adaptive reuse of historic water-related structures. Throughout, it imagines how such efforts will help us develop sustainable futures for cities, landscapes and bodies of water.

Adaptive RF Front-Ends for Hand-held Applications (Analog Circuits and Signal Processing)

by Reza Mahmoudi Arthur H.M. van Roermund Andre Van Bezooijen

The RF front-end - antenna combination is a vital part of a mobile phone because its performance is very relevant to the link quality between hand-set and cellular network base-stations. The RF front-end performance suffers from changes in operating environment, like hand-effects, that are often unpredictable. Adaptive RF Front-Ends for Hand-Held Applications presents an analysis on the impact of fluctuating environmental parameters. In order to overcome undesired behavior two different adaptive control methods are treated that make RF frond-ends more resilient: adaptive impedance control, and adaptive power control. Several adaptive impedance control techniques are discussed, using a priori knowledge on matching network properties, in order to simplify robust 2-dimensional control. A generic protection concept is presented, based on adaptive power control, which improves the ruggedness of a power amplifier or preserves its linearity under extremes. It comprises over-voltage, over-temperature, and under-voltage protection.

Adaptive Reuse for Urban Food Provision: Repurposing Inner-city Car Parking Structures for Controlled Environment Agriculture (Cities and Nature)

by Monika Szopińska-Mularz

This book analyses the adaptive reuse potential of inner-city modern movement car parking structures for controlled environment agriculture systems and the contribution of such a transformation to urban development. Modern movement garages built over the last 60 years are becoming redundant due to changing mobility trends and growing environmental awareness. Adaptive reuse is one of the scenarios that can reconcile these megastructures with contemporary urban needs. The novel function proposed in this study for multi-storey garages is controlled environment agriculture, which is a food production technique that is now developing in cities as an innovative business and a secondary food source. First, the study focuses on the theory of repurposing existing buildings for food production, which is then summarised in the form of a guide for the analysis of the adaptive reuse potential of inner-city car parking structures for controlled environment agriculture. Second, the guide is applied to two case studies, which allows exploring their potential to accommodate urban farming from planning, architectural, and environmental perspectives. The book aims to inspire and support decision-makers, architects, scholars and students when elaborating novel solutions for repurposing buildings for alternative functions. The publication encourages treating existing building stock as a resource that can become a stimulus for the new design process, which improves urban food provision.

Adaptive Platform Trials: The Clinical Trial of the Future?

by Ariel D. Stern Sarah Mehta

In July 2017, Dr. Brian M. Alexander, president and CEO of the AGILE Research Foundation, was preparing to launch a new type of clinical trial—an adaptive platform trial—to study potential therapies for glioblastoma (GBM), an aggressive form of brain cancer. <p><p> Alexander believed that the standard way in which new cancer drugs were tested—the traditional randomized controlled trial (RCT)—was limited in many ways. While statistically rigorous and still considered the “gold standard” in clinical research, traditional RCTs were time-consuming, costly, and limited to testing just one new drug at a time. Adaptive platform trials, by contrast, facilitated simultaneously studying multiple therapies for a given disease and promised a number of efficiency improvements. They also used statistical techniques to allow more patients access to promising therapies. As such, they had the potential to fundamentally change the clinical research process, making clinical trials for new cancer drugs more efficient, more accessible to patients, and more ambitious in scope. <p> For the past three years, Alexander had been working closely with a group of like-minded oncologists, statisticians, and clinical trial strategists to design an adaptive platform trial for GBM in the hopes of identifying effective therapies more quickly. By mid-2017, Alexander and his colleagues had completed a master protocol for the trial. But now the research team faced several design and operational challenges as they prepared for the trial’s launch. Most pressing, how should Alexander and his colleagues finance the trial?

Adaptive Optics Theory and Its Application in Optical Wireless Communication (Optical Wireless Communication Theory and Technology)

by Xizheng Ke Pengfei Wu

This book introduces in detail the theory of adaptive optics and its correction technology for light wave distortion in wireless optical communication. It discusses the adaptive control algorithm of wavefront distortion, proportional+integral control algorithm and iterative control algorithm, and double fuzzy adaptive PID control algorithm. It also covers the SPGD algorithm of adaptive optics correction, deformable mirrors eigenmode method of wavefront aberration correction, vortex beam wavefront detecting wavefront aberration correction, liquid crystal spatial light modulator wavefront correction, different wavelengths of Gaussian beam transmission wavefront differences in the atmospheric turbulence and correction and with wavefront tilt correction adaptive optics wavefront aberration correction. Various distortion correction methods are verified by experiments and the experimental results are analyzed. This book is suitable for engineering and technical personnel engaged in wireless optical communication, college teachers, graduate students and senior undergraduate students.

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