有参加今年MCM/ICM的进来讨论一下

fuhuowy 发表于 2007-2-1 20:12

今年我们是第一次参加这个竞赛，总感觉有些没底，还希望广大同盟一起交流一下，特别是参加过这类比赛的师哥师姐们，共同进步  如外文参考文献的一些相关下载地址？请告知小弟一声

madio 发表于 2007-2-1 22:43

比赛的时候我发了好的文献一定会发上来共享的！

zhutanchao 发表于 2007-4-6 13:06

在很多工程领域，都有线材切割问题。这一问题可表述为:    设能购买到的不同长度的原线材有m种，长度分别为L1,...,Lm，这些原线材只是长度不同，其它都相同。某工程中所要切割出的线材长度分别为li,i=1,2,...,n(这里 li < 所有Li)，对应数量分别为Ni,i=1,2,...,n。设计优化计算方案，求出分别需要购买多少根不同长度的原线材,并能给出切割方案及线材利用率。    现假设某装修工程中需要对铝合金线材进行切割，工程能购买到的同一规格的铝合金线材有二种长度，一种长度是<chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="8" unitname="米">8米</chmetcnv>，另一种是<chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="12" unitname="米">12米</chmetcnv>。现在假设要切割长度和数量如下所示的铝合金线材：       编号       长度(单位:米)       数量(单位:根)   --------------------------------------------------       1          6.20                 90       2          3.60                 120       3          2.80                 136       4          1.85                 310       5          0.75                 215       6          0.55                 320 <span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">应用所设计的计算方案，请问至少需要购买多少根<chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="8" unitname="米">8<span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">米</chmetcnv><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">和<chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="12" unitname="米">12<span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">米</chmetcnv><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">的线材，使浪费的线材比较少，并给出切割方案和计算线材利用率。<span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">做一下这个题目

zhutanchao 发表于 2007-4-6 13:09

我是新手大家多交流啊

wgaggassi34 发表于 2007-4-20 10:44

<div class="msgheader">QUOTE:</div><div class="msgborder">以下是引用zhutanchao在2007-4-6 13:06:06的发言： 在很多工程领域，都有线材切割问题。这一问题可表述为:    设能购买到的不同长度的原线材有m种，长度分别为L1,...,Lm，这些原线材只是长度不同，其它都相同。某工程中所要切割出的线材长度分别为li,i=1,2,...,n(这里 li < 所有Li)，对应数量分别为Ni,i=1,2,...,n。设计优化计算方案，求出分别需要购买多少根不同长度的原线材,并能给出切割方案及线材利用率。    现假设某装修工程中需要对铝合金线材进行切割，工程能购买到的同一规格的铝合金线材有二种长度，一种长度是<chmetcnv unitname="米" sourcevalue="8" hasspace="False" negative="False" numbertype="1" tcsc="0" wst="on"></chmetcnv>8米<chmetcnv></chmetcnv>，另一种是<chmetcnv unitname="米" sourcevalue="12" hasspace="False" negative="False" numbertype="1" tcsc="0" wst="on"></chmetcnv>12米<chmetcnv></chmetcnv>。现在假设要切割长度和数量如下所示的铝合金线材：       编号       长度(单位:米)       数量(单位:根)   --------------------------------------------------       1          6.20                 90       2          3.60                 120       3          2.80                 136       4          1.85                 310       5          0.75                 215       6          0.55                 320 <span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: "Times New Roman";">应用所设计的计算方案，请问至少需要购买多少根<chmetcnv unitname="米" sourcevalue="8" hasspace="False" negative="False" numbertype="1" tcsc="0" wst="on"></chmetcnv>8<span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: "Times New Roman";">米<chmetcnv></chmetcnv><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: "Times New Roman";">和<chmetcnv unitname="米" sourcevalue="12" hasspace="False" negative="False" numbertype="1" tcsc="0" wst="on"></chmetcnv>12<span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: "Times New Roman";">米<chmetcnv></chmetcnv><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: "Times New Roman";">的线材，使浪费的线材比较少，并给出切割方案和计算线材利用率。<span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: "Times New Roman";">做一下这个题目<span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-bidi-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: "Times New Roman";">谢谢分享</div>

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数学建模社区-数学中国's Archiver

有参加今年MCM/ICM的进来讨论一下