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纯语音和带噪语音,信噪比,带噪语音的产生,语音信号的预处理一——消除趋势项和直流分量(Pretreatment with a pure voice and noisy speech signal to noise ratio, resulting in noisy speech, the speech signal- to eliminate the trend term and DC components)

说明：  二维自适应维纳滤波，维纳滤波对图像噪声的影响。(Two-dimensional adaptive filtering, Wiener filtering of image noise.)

leach protocol of wireless sensor network

RANDOM NUMBER GENERATION AND TEST FOR RANDOMNESS

this is a good paper for satellite.

add all prime num smaller than n and this is a simple code run by windows cmd

MATLAB中ODE算法的完整例程，可以参照学习，并且可以直接改动参数，可以运行成功。(Complete routine in MATLAB ODE algorithm can refer to learn, and you can directly change the parameters, you can run successfully.)

A cyclic redundancy check (CRC) is an error-detecting code commonly used in digital networks and storage devices to detect accidental changes to raw data.

kaiser窗函数实现的数字高通，低通和带通滤波器。(kaiser window function to achieve the digital high pass, low pass and band-pass filter.)

matlab canny算子。自己编写。(matlab canny operator)