ApEn

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. )

something about physics

胡广书《数字信号处理-理论，算法和实现》第二版光盘内容，覆盖所有章节课后习题内容(Hu Guang book " Digital Signal Processing- theory, algorithms and implementation," Second Edition CD-ROM content, covering all sections of the content of after-school exercise)

Gonzalez, digital image processing of matlab toolkit

TD_LTE核心网中的EPC核心网引入策略及组网方案_张坤忠.pdf(Introducing strategy and networking solution _ Zhang Kunzhong.Pdf )

采用身高和体重数据作为特征，利用C均值聚类方法对数据进行聚类，并将聚类结果表示在二维平面上。(Height and weight data as a feature, using C-means clustering method of data clustering and clustering results expressed in the two-dimensional plane.)

leaf recognition by Flavia

MATLAB program for APT image decoding. Use of the envelope detection. Processing of a WAV file, creating image

说明：  本文档中的源代码是利用谱减法对语音信号进行增强，再matlab中运行可达到预期的效果。(The source code in this document is to use spectral subtraction to enhance the speech signal, and then run matlab can achieve the desired results.)

说明：  matlab例子自适应滤波最陡下降法特征值扩散度仿真，变步长仿真(Matlab example of adaptive filtering steepest descent method for eigenvalue proliferation simulation, variable step simulation)