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huff2man and it uploads a file that can be used

求图像的峰值信噪比PSNR，下载可以直接使用，希望能够帮助需要的同学(The peak signal to noise ratio of PSNR for the image.Download can be used directly, hope to help students in need.)

此代码仿真了一个语音输入输出系统，语音信号经过AD转换后，经过DSSS调制解调后，通过DA转换还原输入的声音，每一步的的波形都可以观测，对实际DSSS系统设计有很大的参考价值(This code simulation of a voice input and output systems, speech signal after AD conversion after DSSS modem through DA conversion to restore the input voice, each step of the waveform can be observed, the actual design of DSSS systems have great reference value)

理想大气数据计算密度 压强 温度，0-40km以内高度(Ideal atmospheric pressure temperature data density within ,0-40km height)

基于matlab的直方图处理，增强细节处理效果，暗处细节可以得到更好体现，并显示处理前后的直方图(Matlab histogram processing to enhance the details of the treatment effect)

ARMA模型的建立程序，适合初学者研究，欢迎下载(ARMA model program for beginners of, welcome to download)

Matlab仿真应用模型，仿真电力系统的各种故障类型，基于SIMULINK(Matlab simulation application model, simulation of various fault types of power system based on SIMULINK)

C# code for software engineer and student who want to learn

it describes about the functionality of MAC layer in wimax implementation

说明：  FracLab的一些源代码，FracLab是用于分形分析的toolbox(some of the source code in FracLab, FracLab is toolbox for fractal analysis)