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²»ÖªµÀÄÄÀï³öÏÖÎÊÌâÁË£¬×ÜÊÇÔËÐв»³É¹¦Å¶£¡ÓиßÈËÖ¸µãÏÂÂð£¿Ð»Ð» ´úÂëÈçÏ£ºÇ°Á½¸öº¯Êý¶¼¿ÉÒÔ£¬ºóÃæÁ½¸ö×ÜÊDz»ÐУ¡ clear all; close all; clc; datas=[5.82 0.637 8.82 0.556 11.82 0.46 14.82 0.355 17.82 0.419 20.82 0.34 23.82 0.354 26.82 0.332 29.82 0.308 32.82 0.272 35.82 0.36 38.82 0.303 41.82 0.302 44.82 0.317 47.82 0.385 50.82 0.357 53.82 0.299 56.82 0.324 59.82 0.33]; x=datas(:,1);y=datas(:,2); %4Öк¯ÊýÐÎʽ·Ö±ðΪ£º %y1=a*x^(-b)---Kostiakow¹«Ê½ fun_1=inline('parm_1(1)*x.^(-parm_1(2))','parm_1','x');%inlineÓÃÀ´¶¨Ò庯Êý parm_1=nlinfit(x,y,fun_1,[0.01 0.01]); %y2=fc+(f0-fc)*exp(-kx)---Horton¹«Ê½ fun_2=@(parm_2,x) parm_2(1)+(parm_2(2)-parm_2(1))*exp(-parm_2(3)*x);%@ÓÃÀ´¶¨Ò庯Êý parm_2=lsqcurvefit(fun_2,[0.01 0.01 0.01],x,y); %y3=k+k1/x^alpha---fang¹«Ê½ fun_3=inline('parm_3(1)+parm_3(2)/x.^parm_3(3)','parm_3','x'); parm_3=nlinfit(x,y,fun_3,[0.01 0.01 0.01]); %y4=fc+(f1-fc)/x^alpha---jiang¹«Ê½ fun_4=@(parm_4,x) parm_4(1)+(parm_4(2)-parm_4(1))/x.^parm_4(3); parm_4=lsqcurvefit(fun_4,[0.01 0.01 0.01],x,y); |
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blesswj
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