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发表于 2005-4-24 05:42:20
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<>请教:</P>< #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><FONT face="Times New Roman">A. </FONT>线材切割问题<p></p></P>< #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><p><FONT face="Times New Roman"> </FONT></p></P><P #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><FONT face="Times New Roman"> </FONT>在很多工程领域,都有线材切割问题。这一问题可表述为<FONT face="Times New Roman">:<p></p></FONT></P><P #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><FONT face="Times New Roman"> </FONT>设能购买到的不同长度的原线材有<FONT face="Times New Roman">m</FONT>种,长度分别为<FONT face="Times New Roman">L1,...,Lm</FONT>,这些原线材<p></p></P><P #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>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<FONT face="Times New Roman">li,i=1,2,...,n<p></p></FONT></P><P #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><FONT face="Times New Roman">(</FONT>这里<FONT face="Times New Roman"> li < </FONT>所有<FONT face="Times New Roman">Li)</FONT>,对应数量分别为<FONT face="Times New Roman">Ni,i=1,2,...,n</FONT>。<p></p></P><P #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>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<FONT face="Times New Roman">,</FONT>并能给出切割方案<p></p></P><P #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>及线材利用率。<p></p></P><P #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><p><FONT face="Times New Roman"> </FONT></p></P><P #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><FONT face="Times New Roman"> </FONT>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<p></p></P><P #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><p><FONT face="Times New Roman"> </FONT></p></P><P #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>金线材有二种长度,一种长度是<st1:chmetcnv w:st="on" UnitName="米" SourceValue="8" HasSpace="False" Negative="False" NumberType="1" TCSC="0"><FONT face="Times New Roman">8</FONT>米</st1:chmetcnv>,另一种是<st1:chmetcnv w:st="on" UnitName="米" SourceValue="12" HasSpace="False" Negative="False" NumberType="1" TCSC="0"><FONT face="Times New Roman">12</FONT>米</st1:chmetcnv>。现在假设要切割长度和数量如下所<p></p></P><P #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><p><FONT face="Times New Roman"> </FONT></p></P><P #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>示的铝合金线材:<p></p></P><P #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><p><FONT face="Times New Roman"> </FONT></p></P><P #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><FONT face="Times New Roman"> </FONT>编号<FONT face="Times New Roman"> </FONT>长度<FONT face="Times New Roman">(</FONT>单位<FONT face="Times New Roman">:</FONT>米<FONT face="Times New Roman">) </FONT>数量<FONT face="Times New Roman">(</FONT>单位<FONT face="Times New Roman">:</FONT>根<FONT face="Times New Roman">)<p></p></FONT></P><P #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><FONT face="Times New Roman"> --------------------------------------------------<p></p></FONT></P><P #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><FONT face="Times New Roman"> 1 6.20 90<p></p></FONT></P><P #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><FONT face="Times New Roman"> 2 3.60 120<p></p></FONT></P><P #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><FONT face="Times New Roman"> 3 2.80 136<p></p></FONT></P><P #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><FONT face="Times New Roman"> 4 1.85 310<p></p></FONT></P><P #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><FONT face="Times New Roman"> 5 0.75 215<p></p></FONT></P><P #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><FONT face="Times New Roman"> 6 0.55 320<p></p></FONT></P><P #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><p><FONT face="Times New Roman"> </FONT></p></P><P #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>应用所设计的计算方案,请问至少需要购买多少根<st1:chmetcnv w:st="on" UnitName="米" SourceValue="8" HasSpace="False" Negative="False" NumberType="1" TCSC="0"><FONT face="Times New Roman">8</FONT>米</st1:chmetcnv>和<st1:chmetcnv w:st="on" UnitName="米" SourceValue="12" HasSpace="False" Negative="False" NumberType="1" TCSC="0"><FONT face="Times New Roman">12</FONT>米</st1:chmetcnv>的线材,使浪费的线材比<p></p></P><P #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>较少,并给出切割方案和计算线材利用率。<p></p></P><P #eef3ff; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><p><FONT face="Times New Roman"> </FONT></p></P><P>回复后发到:zmdxyboyandy1@21cn.com</P> |
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