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pid implementation in c++ by backward euler approcimation

大家看看，好东西很新-you look at the good things new

说明：  PR控制器，永磁同步电机双闭环调速系统matlab仿真(Matlab simulation of double closed loop speed control system of PR controller and permanent magnet synchronous motor)

simple active directory and LDAP utils

实现了EEMD分解的头文件，可以对各种波进行降噪。 实现了EEMD分解的头文件，可以对各种波进行降噪。(The head file of EEMD decomposition is realized, which can de-noising all kinds of waves.)

说明：  Zigbee的开发资料，包括原理图和PCB图(Development materials of Zigbee, including schematic and PCB diagrams)

一个游戏的解决方案，用来说明跳马的步骤和实现-a game of the solution, used to illustrate the vault and the steps to achieve

多边形矩形坐标逆时针排序11223344556677889900(noAnticlockwise sorting of polygonal rectangular coordinates 1)

在SD卡上实现FAT32文件系统，C实现，可程序结构清晰，简单易懂。里面还有一篇介绍FAT32文件系统的文档，学习代码之前，请耐心将pdf文档研读一遍，这样能达到事半功倍的效果(mplemented on the SD card FAT32 file system, C realized, program structure clear, simple and understandable. There is also a description of the document FAT32 file system, learning code, please be patient to read pdf documents again, so to achieve a multiplier effect。)

另类俄罗斯方块，可以上下左右将游戏界面隐藏哦！很酷的。-alternative Russian box, above and below the interface of the game hidden Oh! Cool.