要求用户输入一字符串，程序检查字符串中的“a”的个数，报告给用户”你输入的字符串中有？个a...

calculating CRC from digital and analog input

基于MATLAB的直扩信号的产生，扩频，调制解调以及解扩(matlab dsss )

mfc下的自绘的Tab控件，可在标签前添加位图，非常漂亮，简单易用。(mfc Tab painted under the self-control can be added before the label bitmap, very beautiful, easy to use. )

说明：  c#example to access step7 wincc to export the varient

一個簡單的thread程式 他能教初學者使用兩個thread，初學者可以看看。(thread teacher. It s easy. You can try it.)

stm32f103zet6 KEIL MDK 包括功能 3.5寸TFT彩屏 fsmc接口通讯； 电阻触摸 xpt2046 采用SPI通讯 AD数据采集 DMA传输 2000点，以及平滑滤波；DA输出； (Stm32f103zet6 including 3.5-inch TFT color screen fsmc interface communication Resistive touch xpt2046 using SPI communication AD data acquisition DMA transfer 2000 points, and smoothing filter DA output )

说明：  本示例基于stm32f103外设固件库开发的AD7091驱动程序，内涵初始化和AD获取操作代码。 在项目中亲测可以正常运行和使用，适合参考作为二次开发。(This example is based on the ad7091 driver developed by STM32F103 peripheral firmware library, which initializes the connotation and obtains the operation code of AD In the project, the pro test can run and use normally, which is suitable for reference as the secondary development.)

一些介绍系统参数辨识方法的论文，包括迭代梯度算法，最小二乘算法等。很好的资料。(Some paper describes the system parameter identification methods, including iterative gradient algorithm, least squares algorithm. Good information.)

完成端口服务器，支持同步发送接收，支持内存池，支持简单丢包算法。(Completion port server to support simultaneous sending and receiving, support memory pool to support a simple algorithm for packet loss.)

说明：  stm32用户说明书，可以帮助开发者快速建立上传完成后请等待几分钟到一个小时。(stm32 user manuaml NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;)