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编写一个可以增强图像的函数，可以使得图像的灰度级转变。(Write a function that can enhance the image, you can make changes in the gray level of the image.)

利用BP神经网络识别字母，选用改进的BP算法，精度高，抗噪声能力好(BP neural network using the letters, use the improved BP algorithm, high precision, good noise immunity)

the matlab file to calculate radar PRF staggering

Toeolitz矩阵的相乘程序，实现Toeplitz矩阵的相乘操作(matlab program for toeplitz matrix multiplication)

说明：  matlab小波分析高级技术的全面源码，与大家分享。(the whole source code of the book <<The high technique of Wavelet Analysis based on Matlab>>)

control examples of a nuniversity laboratory

雷达波门内的波束通常是有编号的，本程序通过检索波束索引，读取波门内所有回波信号(Radar beam is usually a door number, the program retrieves the beam through the index, read the wave door all echo signals)

patch antenna using FDTD method........ skjfhiumghiroghmncjkdngvdgmcduucfu

Algorithm Collections for Digital Signal Processing

能够实现MIT/BIH心电信号三文件的读取功能，有需要的可以下载了解，比较实用。(To achieve MIT/BIH ECG reading the three documents, can be downloaded in need of understanding and more practical.)