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最佳信号理论与设计方面的电子书，非常不错，值得推荐(Best Signal Theory and design of e-books, very good, worthy of recommendation)

说明：  计算机系统结构（郑伟民）习题答案，答案很全(Computer System Architecture Exercise Answers)

iOS编程教程，最好用的编程文档 电子书 ebook(ios tutorial)

说明：  直流电动机驱动控制集成电路L293D简介，希望对大家有帮助(DC motor driver IC L293D control profiles, we hope to help)

Endnote学习资料，希望对大家学习Endnote有所帮助(Endnote learning materials, want to help them to learn Endnote)

ofdm signal, qam modulation, transmitter, receiver

bit torrent protocol in pdf

经典的建模书籍配合matlab 使用，对于本科生建模非常有用(The classic modeling books are used with MATLAB, which is very useful for undergraduate modeling.)

说明：  让你对Python语言有深入而完整的了解，从而帮助你理解今后遇到的任何Python应用程序实例。(Let you have a thorough and complete understanding of the Python language, so as to help you understand any Python application examples you will encounter in the future.)

Enderton H.B. Elements of set theory (AP, 1977)(K)(T)(ISBN 0122384407)(289s)_MAa_