Catfish

黑客攻防实战技术完全手册：扫描、嗅探、入侵与防御(Technology is completely offensive and defensive combat hackers Manual: scanning, sniffing, and intrusion prevention)

说明：  Introduction to BeiDou navigation satellite system

说明：  Python Cookbook第三版书籍(Python Cookbook,the third book)

北航弹道学ppt，其中包含几种典型弹道说明，典型防空阵地布置和放空区介绍，可用于仿真(Northern ballistics ppt, several typical trajectory shows typical anti-aircraft positions and vent area, it is used to simulate)

运算放大器手册，技术参数，电路、应用实例，订购指南(op datasheet,aboselute charactor)

本书介绍了线性系统和数字信号的基础知识，对学习数字信号处理很有帮助。(this book is about linear system and digital systems,which is helpful to people learning digital signal processing)

科技创新不是一夜之间就能搞成的。他也是一个渐变的过程。(technology innovation is not into the overnight. He is also a gradual process.)

说明：  python灰帽子入门，主要讲反汇编以及IDAPRO的插件编写(python for security for beginners)

说明：  波形发生器仿真图，可调节频率，幅值。可以产生方波三角波正弦波。使用Multisim14.1及以上打开(Waveform generator simulation chart, adjustable frequency, amplitude. It can produce square wave, triangle wave and sine wave. Open with Multisim 14.1 and above)

王锡凡先生写的现代电力系统分析，研究生教材(Modern Power System Analysis, Graduate Textbook by Mr. Wang Xifan)