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介绍了基于87C52 微控制器和SA 8381 型PWM 产生芯片实现的SPWM 型单相逆变电源的全数字化控制系 统。详细说明了该逆变电源系统的原理构成和主电路原理。简要说明了M ITEL 公司的新型SA 8381 带微处理器接口的可编 程SPWM 波形发生器的引脚功能、内部框图及工作原理, 说明了他的技术特点、应用范围等, 并给出了逆变电源系统程序 框图及控制回路程序流程, 软件编程情况。-Introduction based on the 87C52 microcontroller and SA 8381-type chip PWM generated the SPWM type single-phase inverter power all-digital control system. A detailed description of the inverter power supply system the principle of the composition and the main circuit. M ITEL briefly describes the SA 8381

常用基本函数库,也许你需要的正在其中！如果不做程序，下载来收藏也是不错的选择-Common basic function library, perhaps you need is one! If no procedure to download collection is also a good choice

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ArcEngine二次开发 第一章 ArcEngie应用程序开发 第二章 第二课 ArcGIS Engine应用开发基础 第三课 制图控件应用开发 第四课 3D控件的开发 第五课 控件的定制和扩展 第六课 发布 ArcGIS Engine 应用程序.pdf-ArcEngine secondary development of the first chapter ArcEngie application development chapter lesson ArcGIS Engine application development based on the third lesson Drawing Control Application Development fourth class 3D controls its development Control 5 class customization and expansion of the sixth lesson released ArcGIS Engine applications. pdf

印度高手写的hibernate 参考手册 ，非常详细-Indian masters wrote hibernate reference manual, very detailed

X3D国内教材很少，这个教材是本人找了很久才找到的！值得大家 一看！-X3D little domestic materials, the material is looking for a long time before I found! Worth a look!