14-NR

根据中国气象数据网下载的全国气象站点的数据，批量提取所需站点的数据。(According to the data of the national meteorological station, which is downloaded by the China Meteorological data network, the data of the required sites are extracted.)

非线性振动.pdf 刘延柱编写 恢复力与位移不成正比或阻尼力不与速度一次方成正比的系统的振动。尽管线性振动理论早已相当完善,在工程上也已取得广泛和卓有成效的应用，但在实际问题中，总有一些用线性理论无法解释的现象。一般说，线性模型只适用于小运动范围，起出这一范围，按线性问题处理就不仅在量上会引起较大误差，而且有时还会出现质上的差异，这就促使人们研究非线性振动。(Nonlinear Vibration. Compilation of PDF Liu Yanzhu)

windows计时器工具，能够精确到毫(0.001)，说明文档请用office2010打开。(windows timer tools, technology is accurate to the mm (0.001), documentation office2010 open.)

用MATLAB实现单因素/两因素重复测量方差分析，自带工具包中只有非重复测量的方差分析函数ANOVA。anova_rm实现单因素；rm_anova2实现两因素( function stats = rm_anova2(Y,S,F1,F2,FACTNAMES) Two-factor, within-subject repeated measures ANOVA.For designs with two within-subject factors. function [p, table] = anova_rm(X, displayopt)Single factor, repeated measures ANOVA.)

根据X和Y两组数据，将两组数据在X-Y平面上最小二乘法拟合出圆(According to X and Y two sets of data, the two sets of data in the X-Y plane, the least square method of fitting the circle)

本程序是采用有限体积法求解二维对流扩散方程的经典程序。程序里包含各种离散方法，划分网格方法等。适合CFD初学者阅读。(The program is two-dimensional finite volume method for solving convection-diffusion equation of the classic program. Program includes a variety of discrete methods, meshing methods. CFD for beginners)

maple学习资料，以后学习maple就不用担心了(maple learning materials)

说明：  基于MATLAB SIMULINK的F-14战斗机俯仰运动仿真，包含风载模型，控制模型等(Pitch motion simulation of F-14 Fighter Based on MATLAB Simulink, including wind load model, control model, etc)

采用了小波去噪的思想，matlab开发工具箱中的支持向量机，包括邓氏关联度、绝对关联度、斜率关联度、改进绝对关联度。( Using wavelet denoising thought, matlab development toolbox support vector machine, Including Deng s correlation, absolute correlation, correlation of slope, improved absolute correlation.)

homagrapy matrix to find the homagrapy matrix from two pictures, first you need to get a set of coorlation vector