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讲解了变桨距风力发电机组的相关知识，包括其特点、运行控制系统及功率控制等。华北电力大学课堂使用的PPT。(On the variable pitch wind turbine related knowledge,the characteristics, operation control and power control. North China Electric Power University class using ppt.)

非常适合初学者的内部控制课件，内容详细，案例简介明晰，内容适用日常生活(Very suitable for beginners internal control courseware, detailed, case Introduction clarity, will apply in daily life)

版图验证工具calibre的rule deck写法教程(Layout verification tool calibre the rule deck writing tutorial)

c8051f02系列芯片手册,具体型号为c8051f020

office使用小诀窍，详细介绍了office组件的各种简单的快捷的操作方式，对于办公室人员是很好的助手。(Office use tips, detailed introduces the office components, different kinds of simple and quick operation is a good helper for the office personnel. )

安装和配置jBPM4 tomcat signavio gpd(Installation and configuration jBPM4 tomcat signavio gpd)

labview8.2教程,为初学labview8.2的朋友增快学习的进度。(labview8.2 jiaocheng)

cmos模拟电路设计，很经典的一本教材的电子版，大家分享(cmos analog circuit design, it is a textbook classic of the electronic version, we share)

介绍了word的使用技巧，很是值得一看，很有实用价值(introduce the word method ,very useful)

说明：  拓扑图常见，用于各行业网络拓扑，及网络技术规划(Topographic maps are commonly used for network topology and network technology planning in various industries.)