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实现一个可编程表达式的计算器，并判断输入的表达式是否正确。(Expression of the realization of a programmable calculator, and determine the expression entered is correct.)

此系统用EXEL开发，摘要如下，对于血液供需模型，我们对某地区进行了系统模拟，为了使医疗中心花费最少，我们首先对三种情况进行分析，就是不举办活动，每30，60天举办活动，得出结果，每30天举办一次活动，费用最少。最后，我们对模型评价与推广，还有个人的心得体会。-system used EXEL development, summarized below, the blood supply model, we have certain areas of the system simulation, in order to spend at least a medical center, we first of the three, is not organizing activities, held every 415.70 days, the outcome of each 30 days of an event, at least cost. Finally, we model for evaluation and promotion, there are personal experiences.

面向对象简介，介绍面向对象的基本概念和三大核心特色。适合给有一定基础的人讲解用-OPP PPT

说明：  IMX 385驱动源码，可以用于海思3519平台(IMX 385 driver source code, can be used for Hess 3519 platform)

说明：  C++大学基础教程，北京邮电大学电信工程学院，计算机技术中心(Essentials C++ University, Beijing University of Posts and Telecommunication Engineering, Computer Technology Center)

免自动解析各大影视APP，无需再开通VIP去看电影！(Avoid automatic parsing of major movies and TV apps, no need to open VIP to see movies!)

说明：  pscad搭建的电弧模型，断路器模块电弧搭建，仿真分析(Arc model built by PSCAD, arc building and simulation analysis of circuit breaker module)

对二维码进行识别，将简单的二维码图像进行剪切，量化，去噪，矫正，最后识别出二维码的信息。

mimo系统仿真 bpsk调制 瑞利信道 得Eb/No-BER曲线(mimo system simulation bpsk Rayleigh channel modulation in Eb/No-BER curves)

tcl脚本语言教程（pdf格式）。适合入门学习使用。(tcl scripting language tutorial (pdf format). Suitable for entry-learning to use.)