介绍了Tcl语言、Tk工具集以及Tcl和C语言结合编程。《Tcl/Tk入门经典》的第I部分首先介绍了Tcl语言的基本概念和基础知识。第II部分集中介绍如何使用Tk工具集开发图形用户界面。第Ⅲ部分讲解了如何结合Tcl和C语言进行程序开发。

包含机械出版社中译版（高清扫描）和英文原版，非常适合学习的数值分析教材。

Database Systems The Complete Book 2nd Edition.pdf

The advent of multicore processors has renewed interest in the idea of incorporating transactions into the programming model used to write parallel programs.This approach, known as transactional memory, offers an alternative, and hopefully better, way to coordinate concurrent threads. The ACI (atomicity, consistency, isolation) properties of transactions provide a foundation to ensure that con- current reads and writes of shared data do not produce inconsistent or incorrect results. At a higher level, a computation wrapped in a transaction executes atomically - either it completes successfully and commits its result in its entirety or it aborts. In addition, isolation ensures the transaction pro- duces the same result as if no other transactions were executing concurrently. Although transactions are not a parallel programming panacea, they shift much of the burden of synchronizing and co- ordinating parallel computations from a programmer to a compiler, to a language runtime system, or to hardware. The challenge for the system implementers is to build an efficient transactional memory infrastructure. This book presents an overview of the state of the art in the design and implementation of transactional memory systems, as of early spring 2010.

射频电子学，国际优秀教材，第二版，适合电子信息类专业参考

RF Microelectronics 2nd razavi.pdf

国外经典的教课书，从国外网站下载的。是通信专业的课的经典教科书。

Code Complete - A Practical Handbook of Software Construction(2nd Ed)(919s)

信号与系统, 西蒙霍金 Signals and Systems 2nd(Simon Haykin).pdf

sed 和 awk 命令的详细使用方法和说明，英文版，高清，带目录。