ceshi_Excel

We formulate a scheduling problem that takes into account different hardware delays experienced by the secondary users (SUs) in a centralized cognitive radio network (CRN) while switching to different frequency bands. We propose a polynomial-time suboptimal algorithm to address our formulated scheduling problem. We evaluate the impact of varying switching delay, number of frequencies, and number of SUs. Our simulation results indicate that our proposed algorithm is robust to changes in the hardware spectrum switching delay and its performance is very close to its upper bound. We also compare our proposed method with the corresponding constant switching delay-based algorithm and demonstrate that our suggestion of taking into account the different hardware delays while switching to different frequency bands is essential for scheduling in CRNs.

三相交流故障模型 用matlab搭建的一个系统 十分实用 可直接用于故障测距(A three-phase AC system fault model built with very practical matlab can be directly used for fault location)

全国数学建模竞赛2012B题中太阳能小屋的最优光伏电板铺设的程序(The program laying in the the solar hut optimal photovoltaic panels in the National Mathematical Contest in Modeling 2012B title)

find paper on image processing in matlab

说明：  线性宽带CSM相干信号下的MUSIC算法，可用于DOA定位。(MUSIC algorithm for linear broadband CSM coherent signal can be used for DOA location.)

一种基于区域活动轮廓模型，通过引入局部的图像拟合能量来提取图像的局部信息，能够有效的额分割强度不均一的图片。较传统的水平集方法有更少的计算量(By introducing the local image fitting(LIFenergy to extract the local image information,our model is able to segment image with intensity inhomogeneities.)

我根据倒频谱的定义和MATLAB，给出了几种倒频谱的计算，程序如下（可在MATLAB直接使用 ）。但是，从获得的图象还是找不出我要找出的频率。(In accordance with the definition of cepstrum and MATLAB, are given several cepstrum calculation procedures are as follows (which can be used directly in MATLAB). However, access to or can not find the image I would like to find out the frequency.)

本文是编程来实现图像缩放，从而熟悉图像的几何变换(This is a program to implement image scaling, so familiar with the image of the geometric transformation)

一个简单的ezw编解码程序,希望对大家有所帮助。(one simple code about encoding and decoding。I hope it makes any help。)

LMS算法实现自适应滤波 clear close all clc N=10000 设置仿真长度 信号产生参数设定 a1=-0.195 a1=-1.5955 a2=0.95 R0=[1,a1,a2 a1,1+a2,0 a2,a1,1] p=[1,0,0] r=inv(R0)*p 计算理论自相关函数 R=[r(1),r(2) r(2),r(1)] 生成理论自相关矩阵 p1=[r(2),r(3)] 生成互相关 h=inv(R)*p1 计算维纳解 Jmin=r(1)-h *p1 计算维纳解时最小均方误差 u=1/sum(eigs(R)) ( LMS算法实现自适应滤波 clear close all clc N=10000 设置仿真长度 信号产生参数设定 a1=-0.195 a1=-1.5955 a2=0.95 R0=[1,a1,a2 a1,1+a2,0 a2,a1,1] p=[1,0,0] r=inv(R0)*p 计算理论自相关函数 R=[r(1),r(2) r(2),r(1)] 生成理论自相关矩阵 p1=[r(2),r(3)] 生成互相关 h=inv(R)*p1 计算维纳解 Jmin=r(1)-h*p1 计算维纳解时最小均方误差 u=1/sum(eigs(R)) )