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[ Last edited by wuli8 on 2009-11-13 at 21:40 ]
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c111999

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10Â¥2010-03-08 21:01:41
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pfzhangphy

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lei0736(½ð±Ò+1):лл 2010-03-15 11:07
½¨ÒéÕÒ±¾MCµÄÊé¿´°É£¡¿´³ÌÐò²»Èç¿´ÊéºÃ£¡
2Â¥2009-11-16 14:28:20
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bay__gulf

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zeoliters(½ð±Ò+4,VIP+0):¶àл»ØÌû½»Á÷£¡ 11-17 15:04
MC·½·¨ºÜºÃ,Ö»ÊÇÐÎʽ¸´ÔÓµÄÁ¦³¡²»ºÃ¼Ó½øÈ¥

µ±³õѧϰMCʱºòдһ¸öÀý×Ó
ÓÃÓÚÌÓÀëÇúÏßÉÏ local minimum, ÕÒµ½µÄglobal minimum
ʵÑ麯Êýy = cos (x) + cos (3x), ͼÏñ¼ûͼtop
×îµÍµã-2.0, ÊÕÁ²Ä¿±ê-1.99999
´úÂë
CODE:
#include
#include
#include
int main()
{
  float a, d, t;
  float x0, x, y0, y;
  scanf("%f %f %f", &a, &d, &t);
  srand(0);
  x0=a;
  do {
    y0= cos(x0)+cos(3*x0);
    x= x0 + d*(rand()%10000/10000.0-0.5);
    y= cos(x) + cos(3*x);
    printf("%f\t%f\n", x, y);
    if (exp((y0-y)/t) > rand()%10000/10000.0) x0= x;
  } while (y > -1.99999);

  return 0;
}

ÐèÒªÊÖ¹¤ÊäÈëÈý¸ö²ÎÊý,
a: x³õÖµ, d:³¢ÊÔÒÆ¶¯µÄ×î´ó·¶Î§, t: Ï൱ÓÚkT
ͼmiddle ºÍbuttom ·Ö±ðÔÚ(a,d,t)=(0.2, 0.1, 0.8) ʱºò, x ºÍy ËæÔËÐв½ÊýµÄÑÝ»¯
¿É¼ûÔÚÓÐÏÞµÄʱ¼äÄÚ, ͨ¹ý¼òµ¥µÄËã·¨¿ÉÒÔÌÓÀëÇúÏßÉÏ local minimum, ÕÒµ½µÄglobal minimum
ÊʺϷÖ×Ó¸´ÔÓ, ²»ÄÜÒ»Ò»Áоٵĸ÷¸ö¹¹ÏóʱºòµÄ¹¹Ïó·ÖÎö
3Â¥2009-11-16 14:58:51
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

wuchenwf

ÈÙÓþ°æÖ÷ (Ö°Òµ×÷¼Ò)

ÒýÓûØÌû:
Originally posted by bay__gulf at 2009-11-16 14:58:
MC·½·¨ºÜºÃ,Ö»ÊÇÐÎʽ¸´ÔÓµÄÁ¦³¡²»ºÃ¼Ó½øÈ¥

µ±³õѧϰMCʱºòдһ¸öÀý×Ó
ÓÃÓÚÌÓÀëÇúÏßÉÏ local minimum, ÕÒµ½µÄglobal minimum
ʵÑ麯Êýy = cos (x) + cos (3x), ͼÏñ¼ûͼtop
×îµÍµã-2.0, ÊÕÁ²Ä¿±ê-1.99999
´ú ...

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4Â¥2009-11-16 21:52:01
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