AFSA_fx

基于dct的图像水印实现，用MATLAB哟(watermark based on DCT)

for fast optimize programming in matlab

snakegame by window api simple game

关于污水处理厂中生化池中溶解氧的控制，程序使用的是一般的PID控制，PLC模块存放在PLC的CPU中，m文件中有OPC通讯。(About sewage treatment plant biochemical control of dissolved oxygen in the pool, the program uses the general PID control, PLC module is stored in the PLC CPU, m is the file has OPC communication.)

building a digital channel with calculating ber

Video IO toolbox for matlab. 用directshow做的，比matlab自己的video IO函數強很多。(Video IO toolbox for matlab. Do with DirectShow than matlab own video IO function a lot stronger.)

自己编的瑞利信道模型和它的概率密度函数，初学者看很好(Own series of Rayleigh channel model and its probability density function, look very good for beginners)

数字基带系统将数字信号从时域上看时数字滚降，需要画出滚降前后的波形展示出来。频域上带宽变化了。输入滤波器之前的波形与采样判决之后的波形。采样判决前的频谱。 采样判决后的码型。 2、眼图（采样判决之前的眼图）（信噪比大眼图清晰） 3、误码曲线，（横坐标时信噪比，纵坐标时误码率） 4、Arfa变化对误码特性的影响，变好还是变差(变好)，眼图清晰度变化（清晰），传递函数的带宽的变化。（带宽越大）(1.Digital baseband system point of view the digital signal from the time domain when the number of roll-off, you need to draw the waveform displayed before and after the roll-out. The frequency domain, the bandwidth change. Input filter and sample ruling before the wave after wave. Sample pre-judgment spectrum. Sampling pattern after the verdict. 2, the eye diagram (eye before sampling decision) (SNR big eye clear) 3, the error curve (abscissa when the signal to noise ratio, bit error rate when the vertical axis) 4, Arfa impact of change on BER performance, get better or worse (getting better), change of eye-definition (clarity), the transfer function of the bandwidth changes. (The greater the bandwidth))

将断层剖面划分为一组网格，并以固定的事件数或固定的扫描半径，计算每个网格点处的b值。然后用色彩表示断层面上b值的分布情况，从而反应断层的应力积累情况，便于地震学家分析该断层是否存在发震的可能(This subroutine creates a grid with spacing dx,dy (in degreees). The size will be selected interactively or grids the entire cross section. The b-value in each volume is computed around a grid point containing ni earthquakes or in between a certain radius. The standard deviation is calcualted either with the max. likelihood or by bootstrapping, when that box is checked. If not, both options can be assigned by the additional run assignment. Standard deviation of b-value in non-bootstrapping case is calculated from Aki-formula!)

利用迭代法实现图像阈值分割，简单好用，自带matlab图像直接运行(terative method to achieve image segmentation, easy to use, comes directly run matlab image)