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Programme procurement in construction
\"This book...adds to the impressive 'legacy' of learning which is still emerging from the successful delivery of the London 2012 construction programme.The authors combine the reforming zeal of a champion for change, who was there every step of the way, with academic rigour, and the result is delivered with impressive passion and commitment to.
eBook
Transformers and inductors for power electronics
Based on the fundamentals of electromagnetics, this clear and concise text explains basic and applied principles of transformer and inductor design for power electronic applications. It details both the theory and practice of inductors and transformers employed to filter currents, store electromagnetic energy, provide physical isolation between circuits, and perform stepping up and down of DC and AC voltages.
The authors present a broad range of applications from modern power conversion systems. They provide rigorous design guidelines based on a robust methodology for inductor and transformer design. They offer real design examples, informed by proven and working field examples.
Key features include:
* emphasis on high frequency design, including optimisation of the winding layout and treatment of non-sinusoidal waveforms
* a chapter on planar magnetic with analytical models and descriptions of the processing technologies
* analysis of the role of variable inductors, and their applications for power factor correction and solar power
* unique coverage on the measurements of inductance and transformer capacitance, as well as tests for core losses at high frequency
* worked examples in MATLAB, end-of-chapter problems, and an accompanying website containing solutions, a full set of instructors' presentations, and copies of all the figures.
Covering the basics of the magnetic components of power electronic converters, this book is a comprehensive reference for students and professional engineers dealing with specialised inductor and transformer design. It is especially useful for senior undergraduate and graduate students in electrical engineering and electrical energy systems, and engineers working with power supplies and energy conversion systems who want to update their knowledge on a field that has progressed considerably in recent years.
eBook
An O-acyclic variety of even index
We give the first examples of O-acyclic smooth projective geometrically connected varieties over the function field of a complex curve, whose index is not equal to one. More precisely, we construct a family of Enriques surfaces over P1 such that any multi-section has even degree over the base P1 and show moreover that we can find such a family defined over Q. This answers affirmatively a question of Colliot-Thélène and Voisin. Furthermore, our construction provides counterexamples to: the failure of the Hasse principle accounted for by the reciprocity obstruction; the integral Hodge conjecture; and universality of Abel–Jacobi maps.
Journal Article
Composite Structures of Steel and Concrete
This book provides an introduction to the theory and design of composite structures of steel and concrete. Material applicable to both buildings and bridges is included, with more detailed information relating to structures for buildings. Throughout, the design methods are illustrated by calculations in accordance with the Eurocode for composite structures, EN 1994, Part 1-1, 'General rules and rules for buildings' and Part 1-2, 'Structural fire design', and their cross-references to ENs 1990 to 1993. The methods are stated and explained, so that no reference to Eurocodes is needed. The use of Eurocodes has been required in the UK since 2010 for building and bridge structures that are publicly funded. Their first major revision began in 2015, with the new versions due in the early 2020s. Both authors are involved in the work on Eurocode 4.
eBook
Antenna Design for Mobile Devices
Written by an antenna engineer turned professor who has worked at Apple, Nokia and Amphenol,<i>Antenna Design for Mobile Devices</i>is a comprehensive guide for fresh and intermediate engineers involved in antenna design. The book instructs readers through all aspects of real world antenna designs, which includes how to make a stable antenna fixture, designing various types of antennas, designing an antenna with good manufacturability, using various matching technique to improve antenna performance, setting up production measurement for mass manufacturing, and making antenna SAR and HAC compliant. Most popular antenna categories, such as internal PIFA, integral IFA, internal folded monopole, ceramic antennas, stubby antennas and whip stubby antennas, are introduced in the book. The book focuses on the basic principle of each kind of antenna and emphasizes on key parameters of antenna optimization. Complimentary matching software, which accompanies the book, is provided so readers can practice various antenna matching technique and design matching circuits for real projects. <ul> <li>A one-stop design reference containing all an engineer needs when designing antennas</li> <li>Accessible to readers of many levels, from introductory to specialist</li> <li>Presents shortcuts for engineers who lack antenna knowledge but need no-hassle techniques for designing simple antennas</li> <li>Contains hands-on knowledge not available in other books</li> <li>Written by a practicing expert who has hired and trained numerous engineers</li> <li>Incorporates the various techniques used by pure-play antenna firms, established mobile device brands, and new entrants to the mobile space</li> <li>Comes with antenna matching software written by the author, which can be used for practice and real-world projects</li> <li>Presentation slides with lecture notes available for instructor use</li> </ul> <p>This book is targeted at practicing antenna engineers, particularly those focusing on mobile devices, as well as researchers and academics looking to keep up with this quick-changing field. Engineering managers will find it to be a helpful guide for teaching new hires, while new hires, by using the book themselves, will be able to quickly gain expert-level proficiencies. The book is also suitable for wireless network equipment engineers, who desire a stronger sense of antenna principles, as well as electronic engineering students studying electromagnetics. Readers should possess a basic undergraduate-level understanding of electromagnetic theory.<br /> Companion website for the book:<br /> <a href=\"http://www.wiley.com/go/zhangantenna\">http://www.wiley.com/go/zhangantenna</a></p>
eBook