软硬阈值函数及示例

中文名称：主成分分析 英文名称：principal component analysis 定义：一种统计方法，它对多变量表示数据点集合寻找尽可能少的正交矢量表征数据信息特征。 (Chinese name: Principal component analysis of the English name: principal component analysis defined: a statistical approach, where the variable represents the collection of data points to find the lowest possible number of orthogonal vector characterization data characteristics.)

怎么样在matlab中使用fft函数，以及Fourier 变换的数值计算(how to use fft in matlab)

function pi = solve2(count,m,cc) 借助布冯投针实验 仿真求pi的值 pi=0 frq=0 randNo = binornd(1,cc,1,m) pro=zeros(1,count) for j=1:count for i = 1:m if randNo(1,i) == 1 frq = frq + 1 end pro(i) = frq/i end pi = (2*m)/frq pro(j) = pi end pro = pro,num =1:count plot(num,pro) (function pi = solve2 (count, m, cc) to vote with Buffon needle experiment simulation find the value of pi pi = 0 frq = 0 randNo = binornd (1, cc, 1, m) pro = zeros (1, count) for j = 1: count for i = 1: m if randNo (1, i) == 1 frq = frq+ 1 end pro (i) = frq/i end pi = (2* m )/frq pro (j) = pi end pro = pro, num = 1: count plot (num, pro) )

用matlab求二维凸包，并求出二维凸包的面积(Using matlab to calculate the two-dimensional convex hull, and find the two-dimensional convex hull area)

matlab最小值,用于求一组数据中的最小值。(min function of matlab)

说明：  广义互相关函数，包含所有互相关的权函数，可以方便的使用它，其中PHAT加权效果最好！(Generalized cross-correlation function, contains all of the right to cross-correlation function, can easily use it, in which the weighted best PHAT!)

matlab编写的黄金分割法求极值，C语言写鲍威尔修正算法，对n阶n次函数都实用，详细说明。(Matlab written in golden section method extremum, written in C language Powell correction algorithm, function of order n n practical details.)

As we know, the energy needed for sensors should be electrical. So the rst step before start to work is to convert environmental energy to electrical one. Inside the node there are dierent components for sensing the area, collecting data and processing the data. So the main dierent part of this kind of nodes, in compare of WSN nodes, is the power part. Once the stored energy reach to a certain amount, the power supply for micro controller and transceiver will start to work. They will continue to work until they have energy, as soon as the energy nish, they stops and energy storage device start to work to save energy again. The other fact should be consider about EH-WSN node is that the available energy can change in dierent nodes. So every node has its own harvesting rate.

用matlab实现高斯—若当算法求逆矩阵(Using matlab to achieve Gauss- Jordan matrix inversion algorithm)

measured ACF of TRI RV