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henanshengrenkoulaolinghuawentifenxiyuyuce
该文研究了河南省不同年龄组的历史发展趋势和65岁以上人口未来发展趋势以及影响老龄化相关因素的问题。通过对不同时期的人口数据的分析和预测，从一个经典的模型入手，建立了三个不同的模型，分别 模型、 模型和关联分析模型，然后采用统计分析的方法来解决这些问题，预测出了河南省未来老龄化人口的发展。(This paper studies the different age groups in Henan Province of historical development trends and population over the age of 65, as well as the impact of future development trend of aging-related factors. Different stages of the analysis of population data and projections from a model of the classic, the establishment of three different models, namely, model, models and associated analysis model, and then using statistical analysis methods to solve these problems, predict the Henan Province, the future development of an aging population.)
- 2009-06-20 00:57:31下载
- 积分：1
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lyapunov
李指数计算，该函数用来计算时间序列的最大Lyapunov 指数--Wolf 方法(Lee index calculation, the function is used to calculate the time series of the largest Lyapunov exponent- Wolf method)
- 2013-10-02 01:44:48下载
- 积分：1
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charpt7_5
安德森《计算流体力学及其应用》第七章拟一维喷管流动的数值解 7.5节 再论亚声速—超声速等熵喷管流动的CFD解法。自己编写matlab源代码。(Anderson the computational fluid mechanics and its application "chapter 7 quasi one-dimensional nozzle flow numerical solution of section 7.5 then theory subsonic- supersonic isentropic nozzle flow of CFD method. His writing matlab source code.
)
- 2012-09-01 15:49:03下载
- 积分：1
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jihekalmangujiK
系统参数变化，用集合卡尔曼滤波器估计其变化(System parameters used to estimate the changes in the ensemble Kalman filter)
- 2013-12-25 00:12:24下载
- 积分：1
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mat-pso-localization-master
WSN localization using Particle Swarm Optimization
- 2017-11-06 05:25:46下载
- 积分：1
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jengsang_v23
小波包分析提取振动信号中的特征频率，语音信号的采集与处理，数字信号处理课设，已经调试成功.内含m文件，可直接运行。( Wavelet packet analysis to extract vibration signal characteristic frequency, Acquisition and Processing of the speech signal, digital signal processing class-based, Has been successful debugging. M contains files can be directly run.)
- 2016-05-17 13:30:21下载
- 积分：1
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MIMO-Communication-Systems
说明： 这是一个基于空时分组编码的MIMO_OFDM通信系统的仿真设计。此系统包括QPSK调制解调，IFFT调制，空时编解码，基于训练符号的信道估计等通信模块。
(This is a space-time block coding based on the MIMO_OFDM Communication System Simulation and Design. This system consists of QPSK modulation and demodulation, IFFT modulation, space time coding and decoding, based on training symbols such as communication channel estimation module.)
- 2010-04-05 11:58:10下载
- 积分：1
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batconDC
battery connected DC Motor
- 2014-11-13 00:45:36下载
- 积分：1
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li9_23
clear all
I=imread( lena.bmp )
figure imshow(I)
I2=imrotate(I,-4, bilinear ) 逆时针旋转4度
figure imshow(I2)
I3=fliplr(I) 垂直镜像
figure imshow(I3)
I4=imresize(I,0.5, bilinear ) 缩小为原图的1/2
figure imshow(I4)
A=double(I) 转换为double类型
计算7个不变矩
[nc,nr]=size(A)
[x,y]=meshgrid(1:nr,1:nc) 得到网格
x=x(:)
y=y(:)
A=A(:)
m.m00=sum(A)
if m.m00==0
m.m00=eps
end
m.m10=sum(x.*A)
m.m01=sum(y.*A)
计算均值
xmean=m.m10/m.m00
ymean=m.m01/m.m00
计算中心矩(li9_23.rar
cm.cm00=m.m00
cm.cm02=(sum((y-ymean).^2.*A))/(m.m00^2)
cm.cm03=(sum((y-ymean).^3.*A))/(m.m00^2.5)
cm.cm11=(sum((x-xmean).*(y-ymean).*A))/(m.m00^2)
cm.cm12=(sum((x-xmean).*(y-ymean).^2.*A))/(m.m00^2.5)
cm.cm20=(sum((x-xmean).^2.*A))/(m.m00^2)
cm.cm21=(sum((x-xmean).^2.*(y-ymean).*A))/(m.m00^2.5)
cm.cm30=(sum((x-xmean).^3.*A))/(m.m00^2.5)
im(1)=cm.cm20+cm.cm02
im(2)=(cm.cm20-cm.cm02)^2+4*cm.cm11^2
im(3)=(cm.cm30-3*cm.cm12)^2+(3*cm.cm21-cm.cm03)^2
im(4)=(cm.cm30+cm.cm12)^2+(cm.cm21+cm.cm03)^2
im(5)=(cm.cm30-3*cm.cm12)*(cm.cm30+cm.cm12)...
*((cm.cm30+cm.cm12)^2-3*(cm.cm21+cm.cm03)^2)...
+(3*cm.cm21-cm.cm03)*(cm.cm21+cm.cm03)...
+(3*(cm.cm30+cm.cm12)^2-(cm.cm21+cm.cm03)^2)
im(6)=(cm.cm20-cm.cm02)*((cm.cm30+cm.cm12)^2-(cm.cm21+cm.cm03)^2)...
+4*cm.cm11*(cm.cm30+cm.cm12)*(cm.cm21+cm.cm03)
im(7)=(3*cm.cm21-cm.cm03)*(cm.cm30+cm.cm12)...
*((cm.cm30+cm.cm12)^2-3*(cm.cm21+cm.cm03)^2)...
+(3*cm.cm12-cm.cm30)*(cm.cm21+cm.cm03)...
*()
- 2010-10-17 21:53:14下载
- 积分：1
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chap8
雷达系统8，生成一个均匀直线阵，并绘制仿真曲线(Radar system, to generate a uniform linear array, and draw the simulation curve)
- 2012-03-21 23:39:04下载
- 积分：1
