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This is a JPEG encoding & decoding program of still image. It does not use level shifting. Discrete Cosine transform (DCT) is performed both by classical & Chen s Flowgraph methods. Predefined JPEG quantization array & zigzag order are used here. RUN - LEVEL coding is used instead of Huffman coding. Compression ratio is compared for each DCT method. Effect of coarse and fine quantization is also examined. The execution time of 2 DCT methods is also checked. In addition, most energatic DCT coefficients are also applied to examine the effect in MatLab 7.4.0 R2007a. Input is 9 gray scale pictures & output is 9*9=81 pictures to compare. Blocking effect is obvious. (This is a JPEG encoding & decoding program of still image. It does not use level shifting. Discrete Cosine transform (DCT) is performed both by classical & Chen s Flowgraph methods. Predefined JPEG quantization array & zigzag order are used here. RUN - LEVEL coding is used instead of Huffman coding. Compression ratio is compared for each DCT method. Effect of coarse and fine quantization is also examined. The execution time of 2 DCT methods is also checked. In addition, most energatic DCT coefficients are also applied to examine the effect in MatLab 7.4.0 R2007a. Input is 9 gray scale pictures & output is 9*9=81 pictures to compare. Blocking effect is obvious. )

Interpolation-spline/polynomial interpolation example. Integration-integration using trapezoidal rule (equally spaced data)

matlab有关数字信号处理方面的程序，希望能够给大家一点帮助。(Matlab the digital signal processing procedures, hoping to give us some help.)

对森林生态系统的动力学仿真很有用的东西值得大家学习学习(On the forest ecosystem dynamics simulation is useful to learn something worth learning)

时频分析工具箱,需要的人可以试试,还不错(time-frequency analysis toolkit, the people can try out, quite good)

这一段代码是基于matlab的仿真编程，主要是针对16QAM的调制，代码及其仿真结果无不从各个方面详细分析了技术原理。(This piece of code is based on the Matlab simulation programming for 16QAM modulation, code and its simulation results are all from the various aspects of a detailed analysis of the technical principles.)

说明：  差分进化算法python实现 比较简单啊啊啊啊啊啊(Differential evolution algorithm)

peak filter design for audio signal

OMP算法的MATLAB实现，实验信号为X，为一模拟信号，通过正交匹配跟踪算法来实现信号的重构。(OMP algorithm of MATLAB, and experimental signal for the X, for analog signals, orthogonal matching pursuit algorithm for signal reconstruction.)

数值分析中基于Matlab环境下的关于Cholesky分解的源代码(Numerical analysis environment based on Matlab source code for the Cholesky decomposition)