Прочая образовательная литература
Различные книги в жанре Прочая образовательная литератураAdvanced Signal Integrity for High-Speed Digital Designs
A synergistic approach to signal integrity for high-speed digital design This book is designed to provide contemporary readers with an understanding of the emerging high-speed signal integrity issues that are creating roadblocks in digital design. Written by the foremost experts on the subject, it leverages concepts and techniques from non-related fields such as applied physics and microwave engineering and applies them to high-speed digital design—creating the optimal combination between theory and practical applications. Following an introduction to the importance of signal integrity, chapter coverage includes: Electromagnetic fundamentals for signal integrity Transmission line fundamentals Crosstalk Non-ideal conductor models, including surface roughness and frequency-dependent inductance Frequency-dependent properties of dielectrics Differential signaling Mathematical requirements of physical channels S-parameters for digital engineers Non-ideal return paths and via resonance I/O circuits and models Equalization Modeling and budgeting of timing jitter and noise System analysis using response surface modeling Each chapter includes many figures and numerous examples to help readers relate the concepts to everyday design and concludes with problems for readers to test their understanding of the material. Advanced Signal Integrity for High-Speed Digital Designs is suitable as a textbook for graduate-level courses on signal integrity, for programs taught in industry for professional engineers, and as a reference for the high-speed digital designer.
Play, Talk, Learn: Promising Practices in Youth Mentoring. New Directions for Youth Development, Number 126
This volume brings together the findings from separate studies of community-based and school-based mentoring to unpack the common response to the question of what makes youth mentoring work. A debate that was alive in 2002, when the first New Directions for Youth Development volume on mentoring, edited by Jean Rhodes, was published, centers on whether goal-oriented or relationship-focused interactions (conversations and activities) prove to be more essential for effective youth mentoring. The consensus appeared then to be that the mentoring context defined the answer: in workplace mentoring with teens, an instrumental relationship was deemed essential and resulted in larger impacts, while in the community setting, the developmental relationship was the key ingredient of change. Recent large-scale studies of school-based mentoring have raised this question once again and suggest that understanding how developmental and instrumental relationship styles manifest through goal-directed and relational interactions is essential to effective practice. Because the contexts in which youth mentoring occurs (in the community, in school during the day, or in a structured program after school) affect what happens in the mentor-mentee pair, our goal was to bring together a diverse group of researchers to describe the focus, purpose, and authorship of the mentoring interactions that happen in these contexts in order to help mentors and program staff better understand how youth mentoring relationships can be effective. This is the 126th issue of New Directions for Youth Development the Jossey-Bass quarterly report series dedicated to bringing together everyone concerned with helping young people, including scholars, practitioners, and people from different disciplines and professions. The result is a unique resource presenting thoughtful, multi-faceted approaches to helping our youth develop into responsible, stable, well-rounded citizens.
Жизнь замечательных устройств
Как прославиться химику? Очень просто! В честь него могут быть названы открытая им реакция, новое вещество или даже реагент! Но если этого недостаточно, то у такого ученого есть и ещё один способ оставить память о себе: разработать посуду, прибор или другое устройство, которое будет называться его именем. Через годы название этой посуды сократится просто до фамилии ученого – в лаборатории мы редко говорим «холодильник Либиха», «насадка Вюрца». Чаще можно услышать что-то типа: «А кто вюрца немытого в раковине бросил?» или: «Опять у либиха кто-то лапку отломал». Героями этой книги стали устройства, созданные учеными в помощь своим исследованиям. Многие ли знают, кто такой Петри, чашку имени которого используют и химики, и микробиологи, а кто навскидку скажет, кто изобрёл такое устройство, как пипетка? Кого поминать добрым словом, когда мы закапываем себе в глаза капли?
System Identification. A Frequency Domain Approach
System identification is a general term used to describe mathematical tools and algorithms that build dynamical models from measured data. Used for prediction, control, physical interpretation, and the designing of any electrical systems, they are vital in the fields of electrical, mechanical, civil, and chemical engineering. Focusing mainly on frequency domain techniques, System Identification: A Frequency Domain Approach, Second Edition also studies in detail the similarities and differences with the classical time domain approach. It high??lights many of the important steps in the identification process, points out the possible pitfalls to the reader, and illustrates the powerful tools that are available. Readers of this Second Editon will benefit from: MATLAB software support for identifying multivariable systems that is freely available at the website http://booksupport.wiley.com State-of-the-art system identification methods for both time and frequency domain data New chapters on non-parametric and parametric transfer function modeling using (non-)period excitations Numerous examples and figures that facilitate the learning process A simple writing style that allows the reader to learn more about the theo??retical aspects of the proofs and algorithms Unlike other books in this field, System Identification, Second Edition is ideal for practicing engineers, scientists, researchers, and both master's and PhD students in electrical, mechanical, civil, and chemical engineering.
Atomabsorptionsspektrometrie
Der breite Einsatz der Atomabsorptionsspektrometrie wird in dem grundlegend neubearbeiteten Standardwerk anhand zahlreicher Anwendungsgebiete dargestellt. Die Beschreibung der unterschiedlichen AAS-Techniken im Vergleich ermoglicht dem Anwender, die fur ihn jeweils beste Losung herauszufinden. Bernhard Welz und Michael Sperling ist es gelungen, eine gute Balance zwischen theoretischen Grundlagen und praktischen Anwendungen zu halten. Das neu aufgenommene Kapitel 'Physikalische Grundlagen' macht dem Anwender zusammenfassend die grundlegenden Aspekte der AAS verstandlich. Im Unterschied zur vorigen Auflage wird die Entwicklung der AAS in einem getrennten Kapitel behandelt. So bekommt der Leser in den technischen Kapiteln den aktuellen Stand der Technik ohne historischen Ballast prasentiert. Zusatzliche Kapitel beschreiben instrumentelle Neuentwicklungen wie Automation durch Flie?injektion oder den Einsatz von Computern. Auch methodische Fortschritte wie die Speziesbestimmung kommen nicht zu kurz. Den schnellen Zugriff auf Grundlagen, Anwendungen und Problemlosungen stellt ein ausfuhrliches Sachregister sicher. Ein umfangreiches Literaturverzeichnis erschlie?t eine Fulle weiterfuhrender Informationen.
Principles of Tribology
Professors Wen and Huang present current developments in tribology research along with tribology fundamentals and applications, including lubrication theory, lubrication design, friction mechanism, wear mechanism, friction control, and their applications. In addition to classical tribology, Wen and Huang cover the research areas of the modern tribology, as well as the regularities and characteristics of tribological phenomena in practice. Furthermore, the authors present the basic theory, numerical analysis methods, and experimental measuring techniques of tribology as well as their applications in engineering. Provides a systematic presentation of tribology fundamentals and their applications Discusses the current states and development trends in tribology research Applies the applications to modern day engineering Computer programs available for download from the book’s companion site Principles of Tribology is aimed at postgraduates and senior-level undergraduates studying tribology, and can be used for courses covering theory and applications. Tribology professionals and students specializing in allied areas of mechanical engineering and materials science will also find the book to be a helpful reference or introduction to the topic. Companion website for the book: www.wiley.com/go/wen/tribology
Motion Control Systems
Motion Control Systems is concerned with design methods that support the never-ending requirements for faster and more accurate control of mechanical motion. The book presents material that is fundamental, yet at the same time discusses the solution of complex problems in motion control systems. Methods presented in the book are based on the authors' original research results. Mathematical complexities are kept to a required minimum so that practicing engineers as well as students with a limited background in control may use the book. It is unique in presenting know-how accumulated through work on very diverse problems into a comprehensive unified approach suitable for application in high demanding, high-tech products. Major issues covered include motion control ranging from simple trajectory tracking and force control, to topics related to haptics, bilateral control with and without delay in measurement and control channels, as well as control of nonredundant and redundant multibody systems. Provides a consistent unified theoretical framework for motion control design Offers graduated increase in complexity and reinforcement throughout the book Gives detailed explanation of underlying similarities and specifics in motion control Unified treatment of single degree-of-freedom and multibody systems Explains the fundamentals through implementation examples Based on classroom-tested materials and the authors' original research work Written by the leading researchers in sliding mode control (SMC) and disturbance observer (DOB) Accompanying lecture notes for instructors Simulink and MATLAB® codes available for readers to download Motion Control Systemsis an ideal textbook for a course on motion control or as a reference for post-graduates and researchers in robotics and mechatronics. Researchers and practicing engineers will also find the techniques helpful in designing mechanical motion systems.
Essentials of Computational Electromagnetics
Essentials of Computational Electromagnetics provides an in-depth introduction of the three main full-wave numerical methods in computational electromagnetics (CEM); namely, the method of moment (MoM), the finite element method (FEM), and the finite-difference time-domain (FDTD) method. Numerous monographs can be found addressing one of the above three methods. However, few give a broad general overview of essentials embodied in these methods, or were published too early to include recent advances. Furthermore, many existing monographs only present the final numerical results without specifying practical issues, such as how to convert discretized formulations into computer programs, and the numerical characteristics of the computer programs. In this book, the authors elaborate the above three methods in CEM using practical case studies, explaining their own research experiences along with a review of current literature. A full analysis is provided for typical cases, including characteristics of numerical methods, helping beginners to develop a quick and deep understanding of the essentials of CEM. Outlines practical issues, such as how to convert discretized formulations into computer programs Gives typical computer programs and their numerical characteristics along with line by line explanations of programs Uses practical examples from the authors' own work as well as in the current literature Includes exercise problems to give readers a better understanding of the material Introduces the available commercial software and their limitations This book is intended for graduate-level students in antennas and propagation, microwaves, microelectronics, and electromagnetics. This text can also be used by researchers in electrical and electronic engineering, and software developers interested in writing their own code or understanding the detailed workings of code. Companion website for the book: www.wiley.com/go/sheng/cem
Fossils at a Glance
Fossils provide a powerful tool for the study of the nearly 4-billion-year history of life, and its role in the evolution of Earth systems. They also provide important data for evolutionary studies, and contribute to our understanding of the extinction of organisms and the origins of modern biodiversity. Fossils At A Glance is written for students taking an introductory level course in paleontology. Short chapters introduce the main topics in the modern study of fossils. The most important fossil groups are discussed, from microfossils through invertebrates to vertebrates and plants, followed by a brief narrative of life on Earth. Diagrams are central to the book and allow the reader to see most of the important data “at a glance”. Each topic covers two pages and provides a self-contained suite of information or a starting point for future study. This second edition has been thoroughly revised and brought up to date. It includes new line diagrams as well as photographs of selected fossils
Introduction to Adaptive Lenses
Presents readers with the basic science, technology, and applications for every type of adaptive lens An adaptive lens is a lens whose shape has been changed to a different focal length by an external stimulus such as pressure, electric field, magnetic field, or temperature. Introduction to Adaptive Lenses is the first book ever to address all of the fundamental operation principles, device characteristics, and potential applications of various types of adaptive lenses. This comprehensive book covers basic material properties, device structures and performance, image processing and zooming, optical communications, and biomedical imaging. Readers will find homework problems and solutions included at the end of each chapter—and based on the described device structures, they will have the knowledge to fabricate adaptive lenses for practical applications or develop new adaptive devices or concepts for advanced investigation. Introduction to Adaptive Lenses includes chapters on: Optical lenses Elastomeric membrane lenses Electro-wetting lenses Dielectrophoretic lenses Mechanical-wetting lenses Liquid crystal lenses This is an important reference for optical engineers, research scientists, graduate students, and undergraduate seniors.