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Development of a VC source code, for learning network programming, hope you like them, good dongdong

《MATLAB电机仿真精华50例》是由潘晓晟编著的技术类书籍；该书由电子工业出版社于2007年出版发行。全书共计50个电机仿真实例，全面涵盖磁路与变压器、直流电机、异步电机及同步电机等电机技术领域，内容丰富。本书附录部分提供了一个典型的“电机仿真实验管理系统”开发范例，该系统基于MATLABGUI功能设计开发，附有详细的界面设计思路和程序源代码。(he "50 examples of MATLAB motor simulation essence" is a technical book compiled by Pan Xiaosheng; the book was published by the electronic industry press in 2007. The book contains 50 examples of motor simulation, covering the field of motor technology, such as magnetic circuit and transformer, DC motor, asynchronous motor and synchronous motor, and so on. The appendix of the book provides a typical example of the development of the motor simulation experiment management system, which is based on MATLABGUI function design and development, with detailed interface design ideas and program source code.)

一个随机密码产生器代码-A random password generator code

说明：  双目摄像头实现对目标定，获取参数后才能进行双目标定(Binocular cameras can be used for target determination, and only after parameters are obtained can they be used for bi-target determination.)

利用次梯度算法求解基于拉格朗日对偶方法的问题(subgradient algorithm)

energy management audit notes

编程工具tc20-programming tools tc20

9.1 利用差商近似导数 313 　　9.1.1 中点公式 313 　　9.1.2 利用Taylor公式构造差商公式 314 　　9.1.3 差商公式误差分析与步长优化 319 　　9.1.4 理查森外推法 321 　　9.2 插值型求导方法 323 　　9.3 样条求导 325 　　9.4 利用数值积分求导数 327 　　9.5 数值偏导数 329 　　9.6 MATLAB自带函数应用 329 　　9.6.1 diff函数 329 　　9.6.2 gradient函数 330 　　9.6.3 surfnorm函数 331 　　9.7 应用案例 333(Differential calculus Program code)

说明：  建立水声信道的射线模型在工程应用上有重要的意义。射线声学是把声波的 传播看作是一束无数条垂直于等相位面的射线的传播，每一条射线与等相位面相 垂直，称为声线。声线途经的距离代表波传播的路程，声线经历的时问为波传播 的时间。声线束所携带的能量即为波传播的声能量。与几何光学相似，射线声学 的描述方法给人直观的感觉，在一定的条件下，射线声学的数学运算也比较简捷， 由射线理论给出的声线图可以给声场以直观、形象的理解。 本模型可以准确的衡量声波在海洋中传播路径(Establishing ray model of underwater acoustic channel is of great significance in engineering application. X-ray acoustics refers to sound waves. Propagation is regarded as the propagation of a bunch of innumerable rays perpendicular to the isophase plane, each ray being in phase with the isophase plane. Vertical, called sound line. The distance through which the sound line Travels represents the distance of the wave propagation, and the time that the sound line experiences is the wave propagation. The time. The energy carried by the sound beam is the sound energy of wave propagation. Like geometric optics, ray acoustics The descriptive method gives people an intuitive feeling. Under certain conditions, the mathematical operation of ray acoustics is relatively simple. The sonogram given by ray theory can give an intuitive and visual understanding of the sound field.Accurate measurement of sound wave propagation in the ocean)

代码利用DWT算法实现了电子水印技术。 其中包括了水印的插入，提取，以及4种不同的攻击。最后，测量了psnr(This algorithm describe digital watermark algorithm by using DWT. It implements embedding, extraction, and 4 different attacks. in the end, it measures psnr)