非常实用的相机标定代码，对标定板拍摄20副图片进行标定

标准接口1-5V转换成4-20mA程序，应用于标准传感器接入(Standard Interface 1-5V Converting 4-20mA Program for Standard Sensor Access)

说明：  用VC++编写，MFC文档框架，是一个简易的画图小程序，在文档界面上画图(With VC++ Prepared, MFC framework document is a simple drawing of small procedures, the document interface drawing)

? 快速实现客人入住登记和账务处理，减少客人住店及离店时的等待时间； ? 准确实现客人预定入住的要求，实现有效及有保障的前台系统作业 ? 快速响应住宿客人的有关项目查询要求； ? 实现入住、消费、结账一条龙服务，方便客人在店内的各类消费要求； ? 提供清晰、准确的各类明细报表、账单、给客人留下良好的管理印象(Quickly realize guest check-in and account processing, reduce waiting time for guests to stay and leave the hotel; Accurate realization of guest booking requirements and effective and secure operation of the front desk system Quickly respond to the inquiry requirements of accommodation guests; To realize the one-stop service of check-in, consumption and checkout, so as to facilitate the various consumption requirements of customers in the shop; Provide clear and accurate detailed reports, bills and impressions of management.)

基于流式套接字的TCP回射程序的客户端以及服务器(Retroreflective program based on the TCP stream socket)

加州大学的MATLAB人脸识别代码，采用了图像结构模型，可以很好地识别人脸(University of California MATLAB code for face recognition, using the image structure model, can be a good face recognition)

ios平台基于蓝牙4.0 HeartRate(latform is based on the Bluetooth 4.0 HeartRate)

REV Journal on Electronics and Communications (REV-JEC) is a quarterly peer-reviewed research journal, dedicated to providing a leading edge forum for researchers and professionals to contribute and disseminate innovative research ideas and results in the fields of electronics and communications.

说明：  ESP8266 PWM控制一盏LED的亮度变化。(ESP8266 PWM controls the brightness change of an LED.)

双两程电压表，用TLC1543做的，精准测电压(Double two-way voltmeter)

基于三星ARM7程序开发,最经典的程序设计.由BOOT程序导入工作程序.(Samsung ARM7-based program development, the most classic programming. By the BOOT program to import procedures.)