printed

同意：

1.ebook is more convenience

2.printed book is not environmental friendly 3.printed book is easier to damaged.

Thanks to the advancement of technology, the past years witnessed remarkable improvement of citizen’s living standard. Numerous of electric productions have found their popularity and wide acceptance in modern society, replacing lots of antique things that we have used for many years. Some assert that the instead of the printed books, students well all turn to the eBooks in the not very soon future. I’m in lin

考研英语外刊双语阅读: The printed world

The printed world

Three-dimensional printing from digital designs will transform manufacturing and allow more people to start making things

3D printing

Feb 10th 2011 | FILTON | from PRINT EDITION

FILTON, just outside Bristol, is where Britain’s fleet of Concorde supersonic airliners was built. In a building near a wind tunnel on the same sprawling site, something even more remarkable is being created. Little by little a machine is “printing” a complex titanium landing-gear bracket, about the

印刷电路板板级电磁干扰/电磁兼容性问题要点及工具回顾

印刷电路板板级电磁干扰/电磁兼容性问题要点及工具评述

Bruce Archambeault、Colin Brench、Sam Connora

IEEE ——电气与电子工程师协会会员、高级会员

摘要：

有关印刷电路板（PCB）板级电磁兼容性问题、分析技术与可行解决方案的评述内容相当之多（作者语：至少可以写成一本书）。此篇评述将在PCB电磁兼容性控制技术的早期情况、现今发展和未来走向等方面给您一个简明的介绍。随着印制电路板运行速率的与日俱增，我们面临着新的问题，需要新的分析技术和解决方案。我们更需要长足深远的发展来满足印制电路板运行速率的增加和电路板集成度的不断增长。 关键词：电磁干扰/电磁兼容性（EMI/EMC），EMI/EMC趋势、印制电路板设计、印制电路板工具。

随着处理器处理速度、时钟主频和数据通信链路速度的高速提升，电磁干扰（EMI）

Ⅰ.概述

和电磁兼容性（EMC）设计领域经历了意义重大的改变。EMC问题根源的更深入了解和基础物理学的相关知识，从以前只能简单、盲目使用EMC规则检查的设计办法手中接管了未来PCB设计的走向。并且，应用于任何人类分析师都要花费数以月

bohner~mr, edu Abstract--This paper introduces general discrete linear Harniltonian eigenvalue problems and characterizes the eigenvalues. Assumptions are given, among them the new notion of strict control-lability of a discrete system, that imply isolated

Pergamon

Computers Math. Applic. Vol. 36, No. 10-12, pp. 179-192, 1998© 1998 Elsevier Science Ltd. All rights reserved Printed in Great Britain P I I: S0898-1221(98)00210-7 0898-1221/98$19.00+ 0.00

D i s c r e t e Linear H a m i l t o n i a n Eigenvalue P r o b l e m sM

bohner~mr, edu Abstract--This paper introduces general discrete linear Harniltonian eigenvalue problems and characterizes the eigenvalues. Assumptions are given, among them the new notion of strict control-lability of a discrete system, that imply isolated

Pergamon

Computers Math. Applic. Vol. 36, No. 10-12, pp. 179-192, 1998© 1998 Elsevier Science Ltd. All rights reserved Printed in Great Britain P I I: S0898-1221(98)00210-7 0898-1221/98$19.00+ 0.00

D i s c r e t e Linear H a m i l t o n i a n Eigenvalue P r o b l e m sM