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zyj8119

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[½»Á÷] ¡¾ÇóÖú¡¿Ê¹ÓÃMATLABÄâºÏ³ö°´ÕÕ¹«Ê½µÄϵÊý

ÎÒÏëÄâºÏ³öy=a(1)*exp(-b(1)*B(i,1))+a(2)*exp(-b(2)*B(i,1))+a(3)*exp(-b(3)*B(i,1))+y(0),ÆäÖÐx,yÊÇÒÑÖªÊý£¬ÆäËûµÄ¶¼ÊÇÐèÒªÄâºÏ³öÀ´µÄϵÊý£¬x,y À´×ÔÓÚÕâ¸öÎļþ£ºCT.xls,ÎÒ±àдÁËÒ»¸ömÎļþ£¬²»ÖªµÀΪʲô²»ÐУº
CODE:
function plottu
clc;
B=xlsread('E:\CT.xls','sheet1')
fun=inline('a(1)*exp(-b(1)*B(i,1))+a(2)*exp(-b(2)*B(i,1))+a(3)*exp(-b(3)*B(i,1))+y(0)','a','b','y(0)','x');
a(0)=[10,10,10];
b(0)=[30,30,30];
y(0)=36;
[x,resnorm]=lsqcurvefit(fun,a(1),b(1),y(1),B(i,1),B(i,2));
end

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zyj8119(½ð±Ò+1):лл²ÎÓë
ÄãµÄy(0)ΪʲôÊÇ36ÄØ£¿
2Â¥2011-01-11 22:28:03
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ÐűËÄÏɽ

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xiegangmai(½ð±Ò+1):лл²ÎÓë 2011-01-11 22:43:08
ÄãÄǸöB(i,1)ÊÇɶ¶«Î÷£¿ÊDz»ÊÇÏë˵B(:,1)°¡£¿

ÄãµÄº¯ÊýÊDz»ÊÇÓ¦¸ÃÕâÑù°¡£¿
y(i)=a1*exp(-b1*x(i))+a2*exp(-b2*x(i))+a3*exp(-b3*x(i))+y(0)
3Â¥2011-01-11 22:35:15
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zyj8119

ľ³æ (ÖøÃûдÊÖ)


ÒýÓûØÌû:
Originally posted by ÐűËÄÏɽ at 2011-01-11 22:28:03:
ÄãµÄy(0)ΪʲôÊÇ36ÄØ£¿

ÎÒ¾ÍÊÇËæ±ã¸øÁ˸ö³õÖµ¡£
4Â¥2011-01-11 22:46:34
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zyj8119

ľ³æ (ÖøÃûдÊÖ)


ÒýÓûØÌû:
Originally posted by ÐűËÄÏɽ at 2011-01-11 22:35:15:
ÄãÄǸöB(i,1)ÊÇɶ¶«Î÷£¿ÊDz»ÊÇÏë˵B(:,1)°¡£¿

ÄãµÄº¯ÊýÊDz»ÊÇÓ¦¸ÃÕâÑù°¡£¿
y(i)=a1*exp(-b1*x(i))+a2*exp(-b2*x(i))+a3*exp(-b3*x(i))+y(0)

ÎļþµÄµÚÒ»ÁÐÊý¾Ý¡£
5Â¥2011-01-11 22:46:51
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zyj8119

ľ³æ (ÖøÃûдÊÖ)


ÒýÓûØÌû:
Originally posted by ÐűËÄÏɽ at 2011-01-11 22:35:15:
ÄãÄǸöB(i,1)ÊÇɶ¶«Î÷£¿ÊDz»ÊÇÏë˵B(:,1)°¡£¿

ÄãµÄº¯ÊýÊDz»ÊÇÓ¦¸ÃÕâÑù°¡£¿
y(i)=a1*exp(-b1*x(i))+a2*exp(-b2*x(i))+a3*exp(-b3*x(i))+y(0)

ÄÇÔõô±à³ÌÐò²ÅÄÜÄâºÏ³öa1,a2,a3,b1,b2,b3,y0?
6Â¥2011-01-11 22:47:37
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

ÐűËÄÏɽ

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¡ï ¡ï
robert2020(½ð±Ò+2):¶àлӦÖú£¡ÐÁ¿àÁË£¡¹ÄÀø¼ÌÐø½â´ð£¡ 2011-01-12 11:06:29
% zyj_main.m
clear;clc;
B=xlsread('CT.xls','sheet1');
xdata=B(:,2);
ydata=B(:,3);
a=[10,10,10];
b=[30,30,30];
y0=36;
x=lsqcurvefit(@zyj_fun1,[a,b,y0],xdata,ydata);


-----------------------------------------------------------------------
% zyj_fun1.m
function zas=zyj_fun1(x,xdata)
zas=x(1)*exp(-x(4)*xdata)+x(2)*exp(-x(5)*xdata)+x(3)*exp(-x(6)*xdata)+x(7)';

----------------------------------------------------------------------
½á¹ûËÆºõ»¹²»¶Ô£¬ÄãµÄÕâЩÊý¾Ý±¾Éí¾Í±È½Ï½Ó½üy=a*exp(-b*x)+cÐÎʽ
7Â¥2011-01-11 23:00:46
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ÐűËÄÏɽ

ľ³æ (ÖøÃûдÊÖ)


ÒýÓûØÌû:
Originally posted by zyj8119 at 2011-01-11 22:46:51:

ÎļþµÄµÚÒ»ÁÐÊý¾Ý¡£

´ó¸ç£¬ÄãµÄµÚÒ»ÁÐÊDZàºÅ£¬²»ÊÇÊý¾Ý
8Â¥2011-01-11 23:01:29
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zyj8119

ľ³æ (ÖøÃûдÊÖ)


ÒýÓûØÌû:
Originally posted by ÐűËÄÏɽ at 2011-01-11 23:01:29:


´ó¸ç£¬ÄãµÄµÚÒ»ÁÐÊDZàºÅ£¬²»ÊÇÊý¾Ý

ÄǾ͵ڶþÁаɡ£
10Â¥2011-01-12 12:08:44
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zyj8119

ľ³æ (ÖøÃûдÊÖ)


¡ï
xiegangmai(½ð±Ò+1):лл²ÎÓë 2011-01-13 08:26:54
ÒýÓûØÌû:
Originally posted by ÐűËÄÏɽ at 2011-01-11 23:00:46:
% zyj_main.m
clear;clc;
B=xlsread('CT.xls','sheet1');
xdata=B(:,2);
ydata=B(:,3);
a=[10,10,10];
b=[30,30,30];
y0=36;
x=lsqcurvefit(@zyj_fun1,[a,b,y0],xdata,ydata);


-------------------- ...

ÎÒÓÃÄãµÄ³ÌÐòÔõôÅܳöÕâÑùµÄ½á¹û£º

Local minimum found.

Optimization completed because the size of the gradient is less than
the default value of the function tolerance.

13Â¥2011-01-12 12:32:32
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

ÐűËÄÏɽ

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ÔÎËÀ£¬mainÌù´íÁË¡£»ØÍ·ÕÒÕÒɾû
14Â¥2011-01-13 00:36:24
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ÐűËÄÏɽ

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¡ï
xiegangmai(½ð±Ò+1):¹ÄÀø½»Á÷ 2011-01-13 08:28:42
ÎÒ»¹ÕæÊÇÕâôдµÄ³ÌÐò

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17Â¥2011-01-13 02:45:53
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zyj8119

ľ³æ (ÖøÃûдÊÖ)


ÒýÓûØÌû:
Originally posted by ÐűËÄÏɽ at 2011-01-13 02:45:53:
ÎÒ»¹ÕæÊÇÕâôдµÄ³ÌÐò

²»¹ý£¬°´ÕÕÄãµÄÕâЩÊý¾Ý£¬ÎÒ¾õµÃ¸ù±¾ÄâºÏ²»³öÀ´ÄãÄÇЩ²ÎÊý£¬»òÕß˵¿ÉÒÔÓÐÎÞÇî¶à×é½á¹ûÄÜÂú×ãÌõ¼þ£¬½¨Òé»»Ò»¸öËã·¨ÊÔÊÔ£¬»òÕßÔÚ¹«Ê¾Öжà¼ÓÒ»Ð©Ô¼ÊøÌõ¼þÀ´Åбð

µ«ÊDZðÈËÄâºÏ³öÀ´°¡£¬ÊÇÒÔǰÈË¡£
18Â¥2011-01-13 17:08:13
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ÐűËÄÏɽ

ľ³æ (ÖøÃûдÊÖ)


ÒýÓûØÌû:
Originally posted by zyj8119 at 2011-01-13 17:08:13:

µ«ÊDZðÈËÄâºÏ³öÀ´°¡£¬ÊÇÒÔǰÈË¡£

ÓÐûÓÐÒÔǰÈ˵ijÌÐò°¡£¬¸ø¿´¿´µÄ˵
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19Â¥2011-01-15 16:29:36
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qingmingwu

½ð³æ (ÕýʽдÊÖ)


¡ï
zyj8119(½ð±Ò+1):лл²ÎÓë
Ì«¸ßÉîÁË
20Â¥2011-01-16 10:11:01
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jipd9Â¥
2011-01-11 23:01   »Ø¸´  
zyj8119(½ð±Ò+1):лл²ÎÓë
robert2020(½ð±Ò-3):ΪÁËËûÈ˵ķ½±ã£¬ÇëÎðÔÚÇóÖúÌûÖд¿±íÎÞÒâÒ廨¸´£¡ 2011-01-12 11:07:05
qingchonger11Â¥
2011-01-12 12:24   »Ø¸´  
zyj8119(½ð±Ò+1):лл²ÎÓë
xiegangmai(½ð±Ò-3):ÇëÎðÔÚÇóÖúÌûÖд¿±íÎÞÒâÒ廨¸´£¡ 2011-01-12 12:32:26
tangyanxmc12Â¥
2011-01-12 12:31   »Ø¸´  
zyj8119(½ð±Ò+1):лл²ÎÓë
xiegangmai(½ð±Ò-3):ÇëÎðÔÚÇóÖúÌûÖд¿±íÎÞÒâÒ廨¸´£¡ 2011-01-12 12:32:36
tangyanxmc15Â¥
2011-01-13 01:10   »Ø¸´  
zyj8119(½ð±Ò+1):лл²ÎÓë
xiegangmai(½ð±Ò-1):ÇëÎðÔÚÇóÖúÌûÖд¿±íÎÞÒâÒ廨¸´£¡ 2011-01-13 08:28:16
yingbin201016Â¥
2011-01-13 01:19   »Ø¸´  
zyj8119(½ð±Ò+1):лл²ÎÓë
xiegangmai(½ð±Ò-1):ÇëÎðÔÚÇóÖúÌûÖд¿±íÎÞÒâÒ廨¸´£¡ 2011-01-13 08:28:24
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