评论：邮箱 http://www.shumo.com/home 追求超越，成功会不期而至。享受过程，结果将水到渠成。 Wed, 28 Dec 2011 15:22:31 +0800 hourly 1 http://wordpress.org/?v=3.1 由：lynch1990 http://www.shumo.com/home/%e6%95%b0%e6%a8%a1%e9%82%ae%e7%ae%b1/comment-page-1#comment-6386 lynch1990 Wed, 12 Jan 2011 01:27:50 +0000 http://www.shumo.com/home/?page_id=68#comment-6386 不能翻墙去国外找资料 吗？ 不能翻墙去国外找资料 吗？

]]> 由：amao http://www.shumo.com/home/%e6%95%b0%e6%a8%a1%e9%82%ae%e7%ae%b1/comment-page-1#comment-6253 amao Sat, 30 Oct 2010 12:39:41 +0000 http://www.shumo.com/home/?page_id=68#comment-6253 资源有限，无法提供开放服务。目前只能为各赛区组委会、各高校数模协会提供服务。请联系amao@shumo.com 资源有限，无法提供开放服务。目前只能为各赛区组委会、各高校数模协会提供服务。请联系amao@shumo.com

]]> 由：fenghuina http://www.shumo.com/home/%e6%95%b0%e6%a8%a1%e9%82%ae%e7%ae%b1/comment-page-1#comment-6252 fenghuina Sat, 30 Oct 2010 12:37:48 +0000 http://www.shumo.com/home/?page_id=68#comment-6252 那个Shumo.com 邮箱怎么注册啊？ 那个Shumo.com 邮箱怎么注册啊？

]]> 由：上下隔界 http://www.shumo.com/home/%e6%95%b0%e6%a8%a1%e9%82%ae%e7%ae%b1/comment-page-1#comment-6110 上下隔界 Mon, 26 Jul 2010 12:38:02 +0000 http://www.shumo.com/home/?page_id=68#comment-6110 要一些论文 要一些论文

]]> 由：MODEL http://www.shumo.com/home/%e6%95%b0%e6%a8%a1%e9%82%ae%e7%ae%b1/comment-page-1#comment-6095 MODEL Thu, 15 Jul 2010 08:10:00 +0000 http://www.shumo.com/home/?page_id=68#comment-6095 MODEL: SETS: type/1..7/:t,w,n; car/1..2/:cl,cw; maxtrix(type,car):x; ENDSETS DATA: t=48.7,52.0,61.3,72.0,48.7,52.0,64.0; w=2000,3000,1000,500,4000,2000,1000; n=8,7,9,6,6,4,8; cl=1020,1020; cw=40000,40000; s=302.7; ENDDATA max=@sum(type(i):t(i)*(x(i,1)+x(i,2))); @for(type(i):x(i,1)+x(i,2)<=n(i)); @for(car(j):@sum(type(i):t(i)*x(i,j))<=cl(j)); @for(car(j):@sum(type(i):w(i)*x(i,j))<=cw(j)); @sum(type(i) i #GE# 5:t(i)*(x(i,1)+x(i,2)))<=s; @for(type(i):@gin(x(i,1))); @for(type(i):@gin(x(i,2))); END 指教哪里出错啦 MODEL:
SETS:
type/1..7/:t,w,n;
car/1..2/:cl,cw;
maxtrix(type,car):x;
ENDSETS
DATA:
t=48.7,52.0,61.3,72.0,48.7,52.0,64.0;
w=2000,3000,1000,500,4000,2000,1000;
n=8,7,9,6,6,4,8;
cl=1020,1020;
cw=40000,40000;
s=302.7;
ENDDATA
max=@sum(type(i):t(i)*(x(i,1)+x(i,2)));
@for(type(i):x(i,1)+x(i,2)<=n(i));
@for(car(j):@sum(type(i):t(i)*x(i,j))<=cl(j));
@for(car(j):@sum(type(i):w(i)*x(i,j))<=cw(j));
@sum(type(i) i #GE# 5:t(i)*(x(i,1)+x(i,2)))<=s;
@for(type(i):@gin(x(i,1)));
@for(type(i):@gin(x(i,2)));
END
指教哪里出错啦

]]> 由：MODEL http://www.shumo.com/home/%e6%95%b0%e6%a8%a1%e9%82%ae%e7%ae%b1/comment-page-1#comment-6094 MODEL Thu, 15 Jul 2010 08:09:34 +0000 http://www.shumo.com/home/?page_id=68#comment-6094 MODEL: SETS: type/1..7/:t,w,n; car/1..2/:cl,cw; maxtrix(type,car):x; ENDSETS DATA: t=48.7,52.0,61.3,72.0,48.7,52.0,64.0; w=2000,3000,1000,500,4000,2000,1000; n=8,7,9,6,6,4,8; cl=1020,1020; cw=40000,40000; s=302.7; ENDDATA max=@sum(type(i):t(i)*(x(i,1)+x(i,2))); @for(type(i):x(i,1)+x(i,2)<=n(i)); @for(car(j):@sum(type(i):t(i)*x(i,j))<=cl(j)); @for(car(j):@sum(type(i):w(i)*x(i,j))<=cw(j)); @sum(type(i) i #GE# 5:t(i)*(x(i,1)+x(i,2)))<=s; @for(type(i):@gin(x(i,1))); @for(type(i):@gin(x(i,2))); END MODEL:
SETS:
type/1..7/:t,w,n;
car/1..2/:cl,cw;
maxtrix(type,car):x;
ENDSETS
DATA:
t=48.7,52.0,61.3,72.0,48.7,52.0,64.0;
w=2000,3000,1000,500,4000,2000,1000;
n=8,7,9,6,6,4,8;
cl=1020,1020;
cw=40000,40000;
s=302.7;
ENDDATA
max=@sum(type(i):t(i)*(x(i,1)+x(i,2)));
@for(type(i):x(i,1)+x(i,2)<=n(i));
@for(car(j):@sum(type(i):t(i)*x(i,j))<=cl(j));
@for(car(j):@sum(type(i):w(i)*x(i,j))<=cw(j));
@sum(type(i) i #GE# 5:t(i)*(x(i,1)+x(i,2)))<=s;
@for(type(i):@gin(x(i,1)));
@for(type(i):@gin(x(i,2)));
END

]]> 由：iori http://www.shumo.com/home/%e6%95%b0%e6%a8%a1%e9%82%ae%e7%ae%b1/comment-page-1#comment-6080 iori Thu, 01 Jul 2010 13:12:47 +0000 http://www.shumo.com/home/?page_id=68#comment-6080 求09年高教社全国优秀论文。AB题的。万分感谢。 发到邮箱：983340841@qq.com 求09年高教社全国优秀论文。AB题的。万分感谢。
发到邮箱：983340841@qq.com

]]> 由：飞舞的风筝 http://www.shumo.com/home/%e6%95%b0%e6%a8%a1%e9%82%ae%e7%ae%b1/comment-page-1#comment-5991 飞舞的风筝 Sun, 02 May 2010 08:02:44 +0000 http://www.shumo.com/home/?page_id=68#comment-5991 哪位高人指点一下改从何处着手弄数模啊 哪位高人指点一下改从何处着手弄数模啊

]]> 由：zhanghualei http://www.shumo.com/home/%e6%95%b0%e6%a8%a1%e9%82%ae%e7%ae%b1/comment-page-1#comment-5969 zhanghualei Sat, 10 Apr 2010 12:33:02 +0000 http://www.shumo.com/home/?page_id=68#comment-5969 感觉挺好的 感觉挺好的

]]> 由：Zoki http://www.shumo.com/home/%e6%95%b0%e6%a8%a1%e9%82%ae%e7%ae%b1/comment-page-1#comment-5782 Zoki Mon, 21 Dec 2009 07:00:42 +0000 http://www.shumo.com/home/?page_id=68#comment-5782 某地区内有几个气象观测站，根据10年来各观测站测得的年降雨量(如表6)，由于经济原因，要适当减少气象站。如何设计一个方案：尽量减少观测站，而所得到的年降水量的信息量仍足够大。 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12 1991 276.2 324.5 158.6 412.5 292.8 258.4 334.1 303.2 292.9 243.2 159.7 331.2 1992 251.6 287.3 349.5 297.4 227.8 453.6 321.5 451 466.2 307.5 421.1 455.1 1993 192.7 433.2 289.9 366.3 466.2 239.1 357.4 219.7 245.7 411.1 357 353.2 1994 246.2 232.4 243.7 372.5 460.4 158.9 298.7 314.5 256.6 327 296.5 423 1995 291.7 311 502.4 254 245.6 324.8 401 266.5 251.3 289.9 255.4 362.1 1996 466.5 158.9 223.5 425.1 251.4 321 315.4 317.4 246.2 277.5 304.2 410.7 1997 258.6 327.4 432.1 403.9 256.6 282.9 389.7 413.2 466.5 199.3 282.1 387.6 1998 453.4 365.5 357.6 258.1 278.8 467.2 355.2 228.5 453.6 315.6 456.3 407.2 1999 158.5 271 410.2 344.2 250 360.7 376.4 179.4 159.2 342.4 331.2 377.7 2000 324.8 406.5 235.7 288.8 192.6 284.9 290.5 343.7 283.4 281.2 243.7 411.1 表6 如何建立数学模型? 某地区内有几个气象观测站，根据10年来各观测站测得的年降雨量(如表6)，由于经济原因，要适当减少气象站。如何设计一个方案：尽量减少观测站，而所得到的年降水量的信息量仍足够大。

x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12
1991 276.2 324.5 158.6 412.5 292.8 258.4 334.1 303.2 292.9 243.2 159.7 331.2
1992 251.6 287.3 349.5 297.4 227.8 453.6 321.5 451 466.2 307.5 421.1 455.1
1993 192.7 433.2 289.9 366.3 466.2 239.1 357.4 219.7 245.7 411.1 357 353.2
1994 246.2 232.4 243.7 372.5 460.4 158.9 298.7 314.5 256.6 327 296.5 423
1995 291.7 311 502.4 254 245.6 324.8 401 266.5 251.3 289.9 255.4 362.1
1996 466.5 158.9 223.5 425.1 251.4 321 315.4 317.4 246.2 277.5 304.2 410.7
1997 258.6 327.4 432.1 403.9 256.6 282.9 389.7 413.2 466.5 199.3 282.1 387.6
1998 453.4 365.5 357.6 258.1 278.8 467.2 355.2 228.5 453.6 315.6 456.3 407.2
1999 158.5 271 410.2 344.2 250 360.7 376.4 179.4 159.2 342.4 331.2 377.7
2000 324.8 406.5 235.7 288.8 192.6 284.9 290.5 343.7 283.4 281.2 243.7 411.1
表6
如何建立数学模型?

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