QAM

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. )

controller design using matlab

matlab开发的齿轮时变刚度的计算，可以直接使用的代码(Calculation of variable stiffness when matlab developed gear, you can directly use the code)

计算单个球型粒子的的粒子光强分布，对比不同折射率条件下粒子的光强分布(A particle for calculating a single spherical particle of light intensity distribution)

dft and idft with and with out function

Construction of Regular Gallagher Parity Check

数值计算算法，包含各种算法和程序，主要包含Dijkstra、Dynamic_pro、Floyd等算法(Numerical algorithms)

The eff ect of thyristor-controlled series capacitors (TCSC) on bifurcations of subsynchronous resonance (SSR) in power system

matlab直接打靶法，适用于最优控制。解决小车定点停车问题。(Matlab direct shooting method, applied to the optimal control.Solve the problem of car parking)

利用形态学滤波的算法去除心电信号基线漂移(Removing baseline drift of ECG signals using morphological filtering algorithm)