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最好的点对点（PPP）学习文档，当年学习总结，希望对初学者有所帮助。(The best peer to peer (PPP) learning documents, then learning summary, I hope to help beginners.)

linux用命令安装oracle 不需要显示图像 可以用终端安装(linux with the command to install oracle)

说明：  我们一直用鼠标来操作Windows系统，但你知道用命令怎么来运行吗？有时候用一些命令会起到事半功倍的效果 <1：XP系统命令（1） 2：XP系统命令（2）　　 3：XP系统命令（3）　　 4：XP系统命令（4） 　　我们一直用鼠标来操作Windows系统，但你知道用命令怎么来运行吗？有时候用一些命令会起到事半功倍的效果( We have been operating Windows systems with the mouse, but you know how to run the command? Sometimes some commands will play a multiplier effect <1: XP system commands (1) 2: XP system commands (2) 3: XP system command (3) 4: XP system command (4) We have been operating Windows systems with the mouse, but you know how to run the command? Sometimes some of the commands will play a multiplier effect )

c++完整下载及安装，克服win7不兼容(I can t speacking English .thanks)

全国第一部、国内最好的、全网最热的产品经理公益免费视频教学课程，让你领略产品经理职业的独特魅力。通过浅显易懂的内容引导，真实细致案例解析，让学习者能够清晰的认识和理解“产品经理”的职业特性；并能掌握基本的产品经理技能与思维逻辑，目前已超过60万学习频次！本文档为课程PPT。(The first nationwide, the best, the hottest online product manager public welfare free video teaching course, let you appreciate the unique charm of the product manager profession. Through simple and easy-to-understand content guidance, real and detailed case analysis, so that learners can clearly understand and understand the professional characteristics of the "product manager"; and can grasp the basic product manager skills and logic of thinking, more than 600,000 learning frequency!)

介绍了交流调速及其相关技术的发展现状和发展趋势，以及交流调速系统的主要控制策略。选用工业变频器用异步电机作为研究对象，利用坐标变换理论，分析了异步电机在三相静止坐标系、两相静止与旋转坐标下的电机基本数学模型及其矢量控制原理。(The present situation and development trend of AC speed control and its related technology are introduced, and the main control strategies of AC speed control system are introduced. The basic mathematical model of the motor and its vector control principle are analyzed by using the coordinate transformation theory, which is based on the three-phase stationary coordinate system, two-phase stationary and rotating coordinates.)

DL_T 1057-2007 自动跟踪补偿消弧线圈成套装置技术条件(DL_T 1057-2007 Automatic Tracking Compensation Arc technical conditions of complete sets of equipment)

This is foos This is foos(This is foos)

jlink仿真器烧录指南，当你的仿真器无法使用时，不防试试(jlink emulator burning guide, when you can not use the emulator, you can have a try)

这是基于传感网的信任机制，并有实现方式学习这方面的同学可看看(2011-A Secure Data Aggregation based Trust Management Approach for Dealing with UntrustworthyMotes in Sensor Network)