old-video-player-subeditand-more

MemDC防止屏幕闪烁的好方法，如不使用内存DC在画图，显示时会闪烁。(memdc redraw dc)

二维卷积运算 能够实现图片的卷积处理 绝对原创(Absolute original two-dimensional convolution)

两个设备形成对射，当有人通过时，一台设备发出指令，控制别的设备。(Two devices formed on the radio, when someone passed a device to issue commands to control other devices.)

这个代码的主要作用是练习用的，可以用它来练习，然后得到提高(The code is based on Practice，so we can use it to make some improvement and maybe it can realize some new functions)

Matlab快速傅立叶变换程序，有源代码。(Matlab Fast Fourier Transform program, active code.)

matlab simuink 模糊控制器tank 改进(matlab simuink improved fuzzy controller tank)

说明：  一个非常简单的日历程序，可以作为插件使用(a simple calendar code)

说明：  simulink仿真，电力系统发生故障时，电力系统稳定器作用，使发电机转子功角一致性和频率同步。(Simulink simulation, when the power system fault, the power system stabilizer function, so that the generator rotor power Angle consistency and frequency synchronization)

设关系A是从集合X={1，2，….，n}到集合Y={1，2，…..，m}的二元关系，而关系B是从集合Y到集合Z={1，2，….，p}的二元关系，求A与B的合成关系C。(A relationship is established from the set X = (1,2, ...., N) to the collection Y = (1,2, ... .., m) of binary relations, the relationship B is from a collection of Y to the set Z = ( 1,2, ...., p) of the binary relation, find the relationship between A and B, synthesis of C.)

二维信号卷积，若x为N1*M1的二维信号，y为N2*M2的二维信号，则卷积为(N1+N2-1)*(M1+M2-1)的信号(Two demension signal convolution. )