qiyixing

Feigenbaum this is development of matlab

说明：  利用Matlab仿真脉冲编码调制（PCM）及A律、μ律PCM对声音进行压缩编解码过程。 脉冲编码调制（PCM，Pulse Code Modulation）是一种将模拟语音信号转换成数字信号的编码方式。波形编码器的作用是对采样后的信号样本进行量化和编码。从数学上来看，量化过程就是把一个连续幅度值的无限数集合映射成一个离散幅度值的有限数集合，编码就是用一组二进制数来表示这些映射后的有限数。国际标准化的PCM采用折叠二进制码，符合长途电话质量。根据量化方法的不同，PCM可分为均匀量化PCM和对数PCM两大类，对数PCM中，2Aμ律和律编码都已被定为国际标准。(Matlab simulation using pulse code modulation (PCM) and the A law, μ law PCM codec for voice compression process. Pulse Code Modulation (PCM, Pulse Code Modulation) is an analog voice signal into digital signal encoding. The role of the encoder waveform is sampled signal sample quantization and coding. From the mathematical point of view, the process is to quantify the magnitude of the value of a continuous set of infinite number of maps into a finite number of discrete set of amplitude values​ ​ , encoding is to use a set of binary digits, said after a limited number of these maps. By folding the International Standardization of PCM binary code, in line with long-distance telephone quality. According to the different quantitative methods, PCM can be divided into uniform quantization PCM PCM and the number of two categories, on the number of PCM in, 2Aμ law and legal codes have been designated as international standards.)

matlab code file for matlab cexcution

该程序代码用于求解超越方程，绘制频散曲线，自行可以更改基本参数或方程形式加以利用(Solve the transcendental equation, draw the dispersion curve)

说明：  完整的相机标定程序，基于张正友标定板，用于相机的内参外参标定。(Complete camera calibration procedure, based on Zhang Zhengyou calibration board, is used for camera internal and external parameters calibration.)

This is PSO_algorithm

说明：  利用DBSCAN算法对点进行聚类，聚类结果效果好，可以参考学习(DBSCAN algorithm is used to cluster the points. The result of clustering is good and can be referred for learning)

说明：  文章编辑系统，输入一页文字，程序可以统计出文字、数字、空格的个数。 静态存储一页文章，每行最多不超过80个字符，共N行 (Article editing system, input a word, the program can be worked out, words, numbers, the number of spaces. Static storage an article, each line no more than 80 characters, a total of N rows)

个人编写 在simulink里的编写的一个bump路面激励，用来测试悬架的最优阻尼和刚度值(Personal writing in simulink write a bump in the road excitation, damping and stiffness values ​ ​ for the optimal test suspension)

半正定矩阵cholesky方法将其分解为两个上下三角矩阵相乘的形式。matlab自带的函数只能分解正定矩阵。并且给出例子。(Semi-definite matrix cholesky method be decomposed into two upper and lower triangular matrices form. matlab built-in function can only be positive definite matrix decomposition.)