It continues to surprise that the subject of Electrical and Electronic Engineering does not draw more young people into the profession, either at Technician or Graduate Engineer level. It is rewarding, both financially and intellectually, whatever the particular role chosen. There are exciting roles for every personality, both for men and women, in manufacturing, produc- tion, design, R&D, teaching, management...the list is long; and there are opportunities for travel. Above all perhaps, it is a profession that provides service to the community, whether through the technology of a washing machine, a mobile phone, a laptop, satellite communications, the electrical power system, new renewable generating equipment, electric vehicles both on and off rails...that list is even longer. Engineers are the driving force that brings ideas from the drawing board to the marketplace. A widely publicized fact is the decline in uptake of science, technology, engineering and mathematics (STEM) subjects in schools and colleges. Yet businesses regularly report a shortage of young people with STEM skills. How can a modern technological economy thrive without them? Why might this be the case? A recent survey by the Institution of Engineering and Technology suggests a number of issues: •A lack of relevant subject material in the curriculum. •STEM subjects are viewed as hard so that, in an environment where there is an emphasis on getting good grades, there is a perceived difficulty in getting a good grade in STEM. •The learning process is passive with less and less time spent on practical work. •Perceptions about success in STEM are negative, the technologically adept being seen as ‘nerds’. This extends into careers such that students don’t perceive STEM subjects as a passport to lucrative and interesting jobs. An added concern is the lack of women in the profession, the result, perhaps, of outdated views of engineering. We hope then that the subject material of this the eleventh edition of Hughes will help you extend your own knowledge of STEM subjects, and that you will be encouraged to pursue a career in Electrical and Electronic Engineering. When studying gets hard, as it invariably does, remember the huge range of exciting opportunities within the profession and that there is a well-documented and continuing shortage of Technician and Graduate engineers. We might claim that this is the fiftieth birthday edition of Hughes, the preface to the first edition having been written in April 1959. It is an honour to be editors of the book, earlier editions of which illuminated our own xviii PREFACE TO THE ELEVENTH EDITION undergraduate studies, as it passes this landmark. Once again, we acknowl- edge the support of our families during the course of preparation of this new edition, which is dedicated to our respective wives, Wendy and Judy. John Hiley Keith Brown Heriot Watt University, Edinburgh August 2011

Electronic_Filter_Design_Handbook

This textbook provides a step-by-step method for the development of a virtual interactive power electronics laboratory. Therefore, this textbook is suitable for undergraduates and graduates in electrical and electronics engineering for their laboratory courses and projects in power electronics. This textbook is equally suitable for practising professional engineers in the power electronics industry. They can develop an interactive virtual power electronics laboratory as outlined in this textbook and perform simulation of their new power electronic converter designs. Similarly, instructors may find this textbook useful for running an interactive virtual laboratory course or a new project in the area of power electronics.

国际电工委员会（International Electro technical Commission，简称IEC）成立于1906年，是世界上成立最早的非政府性国际电工标准化机构，是联合国经社理事会(ECOSOC)的甲级咨询组织。 IEC 61375-3-4 Edition 1.0 2014-03 Electronic railway equipment – Train communication network (TCN) –Part 3-4: Ethernet Consist Network (ECN)

Abstract. A purely peer-to-peer version of electronic cash would allow online payments to be sent directly from one party to another without going through a financial institution. Digital signatures provide part of the solution, but the main benefits are lost if a trusted third party is still required to prevent double-spending. We propose a solution to the double-spending problem using a peer-to-peer network. The network timestamps transactions by hashing them into an ongoing chain of hash-based proof-of-work, forming a record that cannot be changed without redoing the proof-of-work. The longest chain not only serves as proof of the sequence of events witnessed, but proof that it came from the largest pool of CPU power. As long as a majority of CPU power is controlled by nodes that are not cooperating to attack the network, they'll generate the longest chain and outpace attackers. The network itself requires minimal structure. Messages are broadcast on a best effort basis, and nodes can leave and rejoin the network at will, accepting the longest proof-of-work chain as proof of what happened while they were gone.

Exploring Chemistry with Electronic Structure Methos, Second Edition, 作者James B. Foresman, Eleen Frisch 出版社Gaussian, Inc, USA, 1996 前言 Gaussian可以做很多事情,具体包括 分子能量和结构研究 过渡态的能量和结构研究 化学键以及反应的能量 分子轨道 偶极矩和多极矩 原子电荷和电势 振动频率 红外和拉曼光谱 核磁 极化率和超极化率 热力学性质 反应途径 计算可以模拟在气相和溶液中的体系,模拟基态和激发态.Gaussian是研究诸如 取代效应,反应机理,势能面和激发态能量的有力工具. 全书结构 序言 运行Gaussian 第一部分 基本概念和技术 第一章 计算模型 第二章 单点能计算 第三章 几何优化 第四章 频率分析 第二部分 计算化学方法 第五章 基族的影响 第六章 理论方法的选择 第七章 高精度计算 第三部分 应用 第八章 研究反应和反应性 第九章 激发态 第十章 溶液中的反应 附录A 理论背景 附录B Gaussian输入方法简介

Electronic Warfare Receivers and Receiver Systems 英文无水印原版pdf pdf所有页面使用FoxitReader、PDF-XChangeViewer、SumatraPDF和Firefox测试都可以打开 本资源转载自网络，如有侵权，请联系上传者或csdn删除 查看此书详细信息请在美国亚马逊官网搜索此书

Foundations of Analog and Digital Electronic Circuits.pdfFoundations of Analog and Digital Electronic Circuits.pdfFoundations of Analog and Digital Electronic Circuits.pdfFoundations of Analog and Digital Electronic Circuits.pdfFoundations of Analog and Digital Electronic Circuits.pdfFoundations of Analog and Digital Electronic Circuits.pdf

Electronic Commerce, 2nd Edition Schneider, Gary P./ Perry, James T. 加里.斯奈德 詹姆斯.佩里