Numerical_Solutions_in_MATLAB

《小波分析理论与Matlab7实现》书中例程()

文件是matlab环境，用于电力分析计算和仿真(Document is a matlab environment, used in power analysis and calculation and simulation)

标准大气子程序，通过插值获得h=0-21336m高度大气密度，声速，静压，粘性等数据。(The standard atmospheric subroutines, h = 0-21336m highly atmospheric density, sound velocity, static pressure, viscosity data obtained by interpolation.)

pitch detection with correlation

研究表明，构成K一L变换矩阵的向量也就是ToePhtz矩阵的特征向量。与此同时，离散 余弦变换矩阵逼近于ToePutz矩阵的特征向量矩阵，所以离散余弦变换矩阵与自然图像的 K一L变换矩阵十分相似。经过离散余弦变换后的变换系数块的协方差矩阵Cy非常接近对角 阵，即除了对角线元素以外，其它很多元素都近似为0，并且在左上角集中了主要能量。这 反映了自然图像大部分区域变化不大，亮度突变只占少数，即图像能量以低频成分为主的特 性。通过变换后的量化，舍弃对视觉效果影响较小的次要信息，可达到进一步的压缩效果。 虽然从去相关性能的意义上讲，DCT是一种次于K一L变换的准最佳变换，但是从算法实现的角度来看，DCT则远远优于K一L变换。首先，当图像的分块大小确定后，DCT的变换矩阵也就随之确定了，不随输入信号的统计特性变化而变化 其次，二维DCT能够分解成两次一维DCT，有利于硬件实现。 (Studies have shown that constitute a K L transformation matrix vector is ToePhtz eigenvector of the matrix. At the same time, discrete The cosine transform matrix approximation in ToePutz matrix eigenvector matrix, so the discrete cosine transform matrix and natural images Is very similar to a K L transformation matrix. After discrete cosine transform, the transform coefficient block of Cy is very close to the diagonal of covariance matrix Matrix, namely except diagonal elements, many other elements are approximate to 0, and focused the main energy in the upper left corner. this Reflects the natural images most area changed little, brightness mutations accounted for only a few, the energy is given priority to with low frequency components of image Sex. Through quantitative after transformation, abandoning smaller effect on the visual performance of secondary information, can achieve further compression effect. Although from related to the performance of the sense, DCT is a kind o)

Matlab初学者的最佳参考，包含了Matlab仿真的基本过程。(Matlab for beginners the best reference, contains the basic process of Matlab simulation.)

gmsk通信系统的matlab仿真程序，可参考使用(GMSK communication system of matlab simulation program)

包络解调分析在轴承故障诊断中的应用，可为故障诊断提供方法(Envelope demodulation analysis in Bearing Fault Diagnosis for fault diagnosis method)

LBM方法2维9速度模型，求解管道圆柱扰流问题。(Channel flow past a cylinderical obstacle(D2Q9, LBM method).)

这个程序就是最基本的粒子群优化算法程序，用Matlab实现，非常简单。(This program is the most basic particle swarm optimization procedures, using Matlab to achieve, is very simple.)