EX4

某个公司采用公用电话传递数据，数据是四位的整数，在传递过程中是加密的，加密规则如下： 　　　每位数字都加上5,然后用和除以10的余数代替该数字，再将第一位和第四位交换，第二位和第三位交换。-A company to transfer data using public telephones, the data is four integers, in the transmission process is encrypted, encryption rules are as follows: Each figures with five, and then divided by 10 instead of the more than a few numbers, and then The first and fourth exchange, the second and third exchange.

单体电池的DST工况电流设置，可用于电池测试以及SOC鲁棒性验证(Current Setting of Single Battery under DST Operation Conditions)

用于串口监听，串口发送数据，自动循环发送等功能(Used for serial port monitoring, serial port send data)

说明：  FTP Search v0.50 search for FTP/HTTP server

基于可编程跨导运算放大器POTA低通有源滤波器设计。该文给出了基于可编程跨导运算放大器(POTA)的有源滤波器设计方法，能在一定范围内实现跨导值程控调节, 提高调节精度和准确度。并且利用Jacobi 法求解相似对角形矩阵，避免解高次方程的难题。所设计的有源滤波电路不易受分布电容的影响，稳定性好、灵敏度低。本文给出了设计实例，显示了该方法的优点。-Based on programmable transconductance operational amplifier POTA low-pass active filter design. In this paper, based on the programmable transconductance amplifier (POTA) of the active filter design method that can realize in a certain range transconductance value of program-controlled adjustment, improve precision and accuracy regulation. Jacobi method and use a similar matrix of angular, high-equation solution to avoid problems. Designed active filter circuit less susceptible to the effects of distributed capacitance, good stability, low sensitivity. In this paper, design examples, showing the advantages of the method.

说明：  仿真算法 1）PV光伏电池模型采用工程实用C1C2数学模型； 2）采用基于占空比扰动的PO扰动观察法实现MPPT最大功率跟踪； 3）采用信号发生器和开关自由组合，实现4种工作模式：模式1，温度固定，光照固定；模式2，温度固定，光照突变；模式3，温度突变，光照固定；模式4，温度突变，光照突变； 4）跟踪效果良好，能够适应环境变化； 5）各个模块功能明确，方便学习和理解。(Simulation algorithm 1) The practical engineering C1C2 mathematical model is adopted in the PV photovoltaic cell model. 2) The maximum power tracking of MPPT is realized by using the PO perturbation observation method based on duty cycle perturbation. 3) The signal generator and switch are combined freely to realize four working modes: mode 1, temperature fixing and light fixing; mode 2, temperature fixing and light mutation; mode 3, temperature mutation and light fixing; mode 4, temperature mutation and light mutation; 4) The tracking effect is good and can adapt to environmental changes. 5) The functions of each module are clear and easy to learn and understand.)

tcpcrypt是一种协议，它尝试加密（几乎）所有网络流量。与其他安全机制不同的是，tcpcrypt是开箱即用的：它不需要配置，不需要更改应用程序，而且即使远程端不支持tcpcrypt，您的网络连接也将继续工作，在这种情况下，连接将优雅地返回到标准的明文tcp。(Tcpcrypt is a protocol that attempts to encrypt (almost) all of your network traffic. Unlike other security mechanisms, Tcpcrypt works out of the box: it requires no configuration, no changes to applications, and your network connections will continue to work even if the remote end does not support Tcpcrypt, in which case connections will gracefully fall back to standard clear-text TCP.)

求最大流的Dinic和SAP算法的实现，各自有递归与非递归版本。在稀疏图上效果比较好。-Dinic for the maximum flow algorithm and the SAP implementation, each of which has recursive and non-recursive version. Effect on the sparse map is better.

用labview读取dxf文件的案列，labview是面向工程师的语言(Using LabVIEW to read the column of the DXF file, LabVIEW is an engineer oriented language)

说明：  c#语言，调用摄像头示例，可用免安装驱动(C # Language, Call Camera Sample, Use Installation-Free Driver)