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yuyi2009

Í­³æ (СÓÐÃûÆø)

[ÇóÖú] matlab³ÌÐòÎÊÌâÇó½â´ð

function[c,err,yc]=bisect(f,a,b,delta)
% Input  - f is the function input as a string 'f'
%        - a and b are the left and right endpoints
%        - delta is the tolerance
% Output - c is the zero
%        - yc = f(c)
%        - err is the error estimate for c
ya = feval(f,a);
yb = feval(f,b);
if ya * yb > 0, end
max1 = 1+ round((log(b-a)-log(delta))/log(2));
for k =1:max1
    c =(a+b)/2;
    yc = feval(f,c);
    if yc==0;
        a=c;
        b=c;
    elseif yb * yc > 0
        b=c;
        yb=yc;
    else
        a=c;
        ya=yc;
    end
    if b - a < delta, break, end
end
c=(a+b)/2;
err=abs(b-a);
yc=feval(f,c);     % Çóº¯ÊýÔÚc´¦µÄº¯ÊýÖµ

for T=200:10:300
   K = exp(-9.3932+3204.71/T+0.835931*log(T)...
       +2.35267*10^-3*T-1.8736*10^-6*T^2+5.1606*10^-10*T^3)
   f=inline('(4*K-1)*x^2-8*K*x+4*K');
   bisect(f,0,1,10^-5)
end
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» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:

ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

yuyi2009

Í­³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
7Â¥: Originally posted by Bruce_lee at 2013-11-24 23:37:40
function problem_solve
%--------------------------------------------
disp('----------------·Ö¸îÏß-----------------');
%--------------------------------------------
function=bisect(f,a,b,delta)
% ...

¶àл~ÄÜ˳±ã½âÊÍÏÂΪʲôÂï~
9Â¥2013-11-24 23:47:44
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
²é¿´È«²¿ 11 ¸ö»Ø´ð

zhg19

½ð³æ (СÓÐÃûÆø)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
LZÏêϸÃèÊöÒ»ÏÂÎÊÌâ¡£¡£¡£
2Â¥2013-11-24 17:21:08
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

yuyi2009

Í­³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
2Â¥: Originally posted by zhg19 at 2013-11-24 17:21:08
LZÏêϸÃèÊöÒ»ÏÂÎÊÌâ¡£¡£¡£

¸øÁËÒ»¸öÓëζÈÏà¹ØµÄƽºâ·½³Ì£¬Çó200-300ÿ¸ô10µÄƽºâ³£Êý£¬ÒÔ¼°Æ½ºâת»¯ÂÊ¡£¡£¡£ÒªÇóÓöþ·Ö·¨Çó½â~
3Â¥2013-11-24 17:46:06
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

zhg19

½ð³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
3Â¥: Originally posted by yuyi2009 at 2013-11-24 17:46:06
¸øÁËÒ»¸öÓëζÈÏà¹ØµÄƽºâ·½³Ì£¬Çó200-300ÿ¸ô10µÄƽºâ³£Êý£¬ÒÔ¼°Æ½ºâת»¯ÂÊ¡£¡£¡£ÒªÇóÓöþ·Ö·¨Çó½â~...

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