diff_ODE

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.)

A set of matlab functions to read, write and deal with .spc spectra and spectral descriptions

基于dct的伪随机序列的数字图像水印，算法较为简单，鲁棒性一般，不能很好地抵御噪声攻击(Dct pseudo-random sequence-based digital image watermarking algorithm is relatively simple and general robustness against noise attack can not)

适用于机械最优化设计课程的最速下降法程序(For mechanical optimization design course program steepest descent method)

最大功率输出控制的光伏发电系统，通过输出功率作为反馈信号控制输入电压，是系统处于最大功率输出。(Maximum power output of photovoltaic power generation system controlled by the output power control input voltage as a feedback signal, the system at the maximum power output.)

kalman filter update equations implemented in this code

说明：  使用matlab编程的m文件，对于了解使用m文件编程的方法有重要意义。(Programming using matlab m file, m file programming for understanding the methods used is important.)

introduction to matlab

全国大学生建模竞赛必备Matlab源码，包含多种数学处理函数。(The National Undergraduate Modeling Contest essential Matlab source code, contains a variety of mathematical processing function.)

一本介绍小波分析方法极其应用的书，从图书馆下载后还没看，感觉应该还不错(An introductory wavelet analysis method is extremely Application book from the library download not see, feel, should be pretty good)