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hht666

½ð³æ (ÕýʽдÊÖ)

[½»Á÷] ¡¾ÇóÖú¡¿ÓÃmatlabÖеĸß˹ţ¶Ù·¨»òµ¥´¿Ð稽øÐÐÄ£ÐÍǶºÏ

¸÷λ¸ßÊÖ, ÎÒ×î½üÅöµ½Ò»ÎÊÌâ,ÐèÒª·ÖÎöÈËÌåÄÚµÄÒ©ÎﺬÁ¿ËæÊ±¼ä±ä»¯,ÐèÒªÓÃÉÏÊö·½·¨½øÐÐÄ£ÐÍǶºÏ, Ö»ÖªµÀmatlab Èí¼þ¿ÉÒÔ¼ÆË㣬Ïë×Ô¼ºÀ´Ê±¼ä²»¹»£¬Ö»ÄÜÇóÖú¸÷λ¸ßÊÖ¡£
t        X
0.5        29701602
1        28952373
2        27578765
3        26202931
4        24616875
5        23031635
6        21218045
7        19869353
8        18343096
9        16833890
10        15504818
11        14335500
12        13110579
13        12048990
14        10987643
Ä£Ð͹«Ê½ÈçÏ£ºX=A¡Áe¡Ä(-a¡Át)+B¡Á e¡Ä(-b¡Át)+C¡Áe¡Ä(-c¡Át)+D¡Á e¡Ä(-d¡Át)
  A£¬a, B,b,C,c, D,d ÐèÂú×ãÈçÏÂÌõ¼þ¡£
A+B+C+D=29792400£¬ A¡Áa+B¡Áb+C¡Ác+D¡Ád=0,
a,b,,c,d ¾ù´óÓÚÁ㣬ÇÒ b>a,b>c,b>d;
Çë¸ßÊÖ½â¾ö£¬30½ð±Ò¾´ÇëЦÄÉ¡£

[ Last edited by µãµã·ç on 2009-3-21 at 12:44 ]
»Ø¸´´ËÂ¥
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

fspdlh

½ð³æ (ÕýʽдÊÖ)

¡ï
µãµã·ç(½ð±Ò+1,VIP+0):¸Ðл²ÎÓëÌÖÂÛ£¬¼Ó·Ö¹ÄÀø£¡ 3-21 12:45
ÎÒ±àµÄº¯ÊýµÄ²ÎÊýΪ
sqrt(a) sqrt(b-max(a,c,d)) sqrt(c) sqrt(d) A B Áù¸ö
ÓÉÕâÁù¸ö²ÎÊýÀ´È·¶¨a b c d A B C D

[ Last edited by fspdlh on 2009-3-20 at 20:02 ]
4Â¥2009-03-20 19:59:03
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
²é¿´È«²¿ 12 ¸ö»Ø´ð

fspdlh

½ð³æ (ÕýʽдÊÖ)

¡ï ¡ï ¡ï ¡ï ¡ï
hht666(½ð±Ò+5,VIP+0):¶àл°¡.ÓÐÒ»¸öÌõ¼þ²»Âú×ã,Çë°ïæÔÙËãËã 3-21 12:02
ÒÔÏÂÊÇÎÒÓ÷ÇÏßÐÔÄâºÏ×öµÄ£¬½á¹ûÓ뼸¸öÁ¿µÄ³õÖµ¹ØÏµ±È½Ï´ó£¬ÄãÄܲ»ÄÜ˵һϸ÷Öµ´óÔ¼ÔÚʲô·¶Î§ÄÚ°¡£¬»òÕßÊý¾ÝÔÙ¶àЩ£¬ÒòΪ´ý¶¨²ÎÊýÌ«¶à£¬Ïà¶ÔÀ´ËµÊý¾ÝÓеãÉÙ
abcd =

    0.0631    0.9828    0.0593    0.0650


ABCD =

  1.0e+009 *

    9.3546   -0.0019   -3.1108   -6.2121


r =

    0.9999



abcd =

    0.0949  184.3219   37.3425    0.2386


ABCD =

  1.0e+007 *

    4.3306    0.0086   -0.0452   -1.3148


r =

    0.9999

[ Last edited by fspdlh on 2009-3-20 at 19:53 ]
2Â¥2009-03-20 19:50:23
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

fspdlh

½ð³æ (ÕýʽдÊÖ)

¡ï ¡ï
Doctorcbw(½ð±Ò+2,VIP+0):лл²ÎÓë 12-8 15:07
ÕâÊdzÌÐò
datafit.mÖУº
function [abcd ABCD r ]=datafit(beta)
load data.txt
t=data(:,1);
X=data(:,2);
beta=nlinfit(t,X,'fun',beta);
a1=beta(1);
delta_b=beta(2);
c1=beta(3);
d1=beta(4);
A=beta(5);
B=beta(6);
a=a1^2;
c=c1^2;
d=d1^2;
b=max(max(a,c),d)+delta_b^2;
C=-(-B*d+A*a+B*b+29792400*d-A*d)/(c-d);
D=(-c*B+A*a+29792400*c-c*A+B*b)/(c-d);
X1=fun(beta,t);
r=corrcoef(X,X1);
r=r(1,2);
abcd=[a b c d];
ABCD=[A B C D];

fun.mÖУº
function X=fun(beta,t)
a1=beta(1);
delta_b=beta(2);
c1=beta(3);
d1=beta(4);
A=beta(5);
B=beta(6);
a=a1^2;
c=c1^2;
d=d1^2;
b=max(max(a,c),d)+delta_b^2;
C=-(-B*d+A*a+B*b+29792400*d-A*d)/(c-d);
D=(-c*B+A*a+29792400*c-c*A+B*b)/(c-d);
X=A.*exp(-a.*t)+B.*exp(-b.*t)+C.*exp(-c.*t)+D.*exp(-d.*t);

data.txtÖУº
0.5        29701602
1        28952373
2        27578765
3        26202931
4        24616875
5        23031635
6        21218045
7        19869353
8        18343096
9        16833890
10        15504818
11        14335500
12        13110579
13        12048990
14        10987643
3Â¥2009-03-20 19:58:10
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

hht666

½ð³æ (ÕýʽдÊÖ)

ллfspdlh,   ÌṩµÄÊý¾ÝµÚÒ»×éÓëʵ¼ÊÏà²î̫Զ.µÚ¶þ×é²»Âú×ãA¡Áa+B¡Áb+C¡Ác+D¡Ád=0,
ÎÒ×Ô¼ºÓÃEXCELÆ´´ÕÁ˼¸¸öÊý¾Ý,³õËãÁËÒ»ÏÂ, A=125025, a=1.18,  B=-110170, b=21.1, C=-1113011,c=0.196, D=31961557,d=0.07498,
caculated
29848802
28782013
26780451
24921904
23187854
21568459
20056542
18645797
17330281
16104289
14962330
13899139
12909690
11989199
11133132
A+B+C+D=29792400¿ÉÒÔÓÐÒ»¶¨Îó²î, µ«A¡Áa+B¡Áb+C¡Ác+D¡Ád=0ÐèÒªÂú×ã,ÎÒµÄÊý¾Ý¾ÍÊǵÈÓÚ1269,ÓÐµãÆ«²î, ÆäÖÐÊý¾Ý·¶Î§»¹ÊÇ·ûºÏÒªÇóµÄ.ÎÒÊÖÉÏûMATLABÈí¼þ,ÇëºÃÐÄÈËÖØÐÂÔÙËãËã.
5Â¥2009-03-21 11:56:42
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
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