200805网友练习《最优化模型》
本帖最后由 为你奋斗 于 2009-12-3 16:13 编辑<P class="MsoNormal" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 6pt 0cm 0pt; TEXT-ALIGN: justify; mso-para-margin-top: .5gd; mso-pagination: none; mso-layout-grid-align: none;"><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'><SPAN style="mso-spacerun: yes;">
</SPAN></SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>某城市拟建</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>A</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>、</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>B</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>两个水厂。从建造和经营两方面考虑，水厂分小、中、大三种规模，日均贮水量分别为</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>30</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>万吨、</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>40</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>万吨及</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>50</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>万吨。由于水资源的原因，</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>A</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>、</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>B</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>两个水厂日进水量总和不超过</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>80</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>万吨。</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>A</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>、</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>B</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>两个水厂共同担负供应六个居民区用水任务，这六个居民区的位置及拥有的家庭户数由表</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>1</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>给出，每户日均用水量为</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>1.0</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>吨，水厂供应居民点用水的成本为</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>1.05</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>元</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>/</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>吨公里。</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'></P><P></P></SPAN><P></P><P class="MsoNormal" align="center" style="MARGIN: 6pt 0cm 0pt; TEXT-ALIGN: center; mso-para-margin-top: .5gd; mso-pagination: none; mso-layout-grid-align: none;"><B style="mso-bidi-font-weight: normal;"><SPAN style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>表</SPAN></B><B style="mso-bidi-font-weight: normal;"><SPAN lang="EN-US" style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>1</SPAN></B><B style="mso-bidi-font-weight: normal;"><SPAN style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'> 各居民区的位置和拥有的家庭户数</SPAN></B><SPAN lang="EN-US" style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'></P><P></P></SPAN><TABLE class="MsoNormalTable" cellspacing="0" cellpadding="0" border="1" style="BORDER-RIGHT: medium none; BORDER-TOP: medium none; MARGIN: auto auto auto 85.3pt; BORDER-LEFT: medium none; BORDER-BOTTOM: medium none; BORDER-COLLAPSE: collapse; mso-table-layout-alt: fixed; mso-border-alt: solid windowtext .5pt; mso-padding-alt: 0cm 5.4pt 0cm 5.4pt; mso-border-insideh: .5pt solid windowtext; mso-border-insidev: .5pt solid windowtext;"><TBODY><TR style="mso-yfti-irow: 0; mso-yfti-firstrow: yes;"><TD valign="top" width="173" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 130pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt;"><P class="MsoNormal" align="center" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: none; mso-layout-grid-align: none;"><SPAN style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>居民点</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'></P><P></P></SPAN><P></P></TD><TD valign="top" width="243" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 182.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt;"><P class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; mso-pagination: none; mso-layout-grid-align: none;"><SPAN lang="EN-US" style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>1 </SPAN><SPAN style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'> </SPAN><SPAN lang="EN-US" style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'> 2<SPAN style="mso-spacerun: yes;">
</SPAN></SPAN><SPAN style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'> </SPAN><SPAN lang="EN-US" style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>3<SPAN style="mso-spacerun: yes;">
</SPAN></SPAN><SPAN style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'> </SPAN><SPAN lang="EN-US" style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>4<SPAN style="mso-spacerun: yes;">
</SPAN></SPAN><SPAN style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'> </SPAN><SPAN lang="EN-US" style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>5<SPAN style="mso-spacerun: yes;">
</SPAN>6</P><P></P></SPAN><P></P></TD></TR><TR style="HEIGHT: 15.35pt; mso-yfti-irow: 1;"><TD valign="top" width="43" rowspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 32.25pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.35pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;"><P class="MsoNormal" align="center" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: none; mso-layout-grid-align: none;"><SPAN lang="EN-US" style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'></P><P>
</P></SPAN><P></P><P class="MsoNormal" align="center" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: none; mso-layout-grid-align: none;"><SPAN style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>位置</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'></P><P></P></SPAN></TD><TD valign="top" width="130" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 97.75pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.35pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;"><P class="MsoNormal" align="center" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: none; mso-layout-grid-align: none;"><SPAN lang="EN-US" style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>xi</P><P></P></SPAN><P></P></TD><TD valign="top" width="243" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 182.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.35pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;"><P class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; mso-pagination: none; mso-layout-grid-align: none;"><SPAN lang="EN-US" style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>0<SPAN style="mso-spacerun: yes;">
</SPAN>1<SPAN style="mso-spacerun: yes;">
</SPAN>2<SPAN style="mso-spacerun: yes;">
</SPAN>3<SPAN style="mso-spacerun: yes;">
</SPAN>4<SPAN style="mso-spacerun: yes;">
</SPAN>5</P><P></P></SPAN><P></P></TD></TR><TR style="HEIGHT: 15.4pt; mso-yfti-irow: 2;"><TD valign="top" width="130" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 97.75pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.4pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;"><P class="MsoNormal" align="center" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: none; mso-layout-grid-align: none;"><SPAN lang="EN-US" style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>yi</P><P></P></SPAN><P></P></TD><TD valign="top" width="243" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 182.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 15.4pt; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;"><P class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; mso-pagination: none; mso-layout-grid-align: none;"><SPAN lang="EN-US" style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>4<SPAN style="mso-spacerun: yes;">
</SPAN>5<SPAN style="mso-spacerun: yes;">
</SPAN>4<SPAN style="mso-spacerun: yes;">
</SPAN>4<SPAN style="mso-spacerun: yes;">
</SPAN>1<SPAN style="mso-spacerun: yes;">
</SPAN>2</P><P></P></SPAN><P></P></TD></TR><TR style="mso-yfti-irow: 3; mso-yfti-lastrow: yes;"><TD valign="top" width="173" colspan="2" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 130pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;"><P class="MsoNormal" align="center" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: none; mso-layout-grid-align: none;"><SPAN style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>家庭户数（万户）</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'></P><P></P></SPAN><P></P></TD><TD valign="top" width="243" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 182.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;"><P class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; mso-pagination: none; mso-layout-grid-align: none;"><SPAN lang="EN-US" style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>10 <SPAN style="mso-spacerun: yes;">
</SPAN>11<SPAN style="mso-spacerun: yes;">
</SPAN>8<SPAN style="mso-spacerun: yes;">
</SPAN>15<SPAN style="mso-spacerun: yes;">
</SPAN>8<SPAN style="mso-spacerun: yes;">
</SPAN><SPAN style="mso-spacerun: yes;">
</SPAN>22</P><P></P></SPAN><P></P></TD></TR></TBODY></TABLE><P class="MsoNormal" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; TEXT-ALIGN: justify; mso-pagination: none; mso-layout-grid-align: none; mso-char-indent-count: 2.0;"><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>(1)</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>若已知</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>A</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>、</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>B</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>两个水厂的位置分别为</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>A=A(1</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>，</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>4)</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>和</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>B=B(4</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>，</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>2)</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>，试确定供水方案使总成本最低；</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'></P><P></P></SPAN><P></P><P class="MsoNormal" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; TEXT-ALIGN: justify; mso-pagination: none; mso-layout-grid-align: none; mso-char-indent-count: 2.0;"><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>(2)</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>若</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>A</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>、</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>B</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>两个水厂的位置尚未确定，请你确定它们的位置及供水方案使总成本最低；</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'></P><P></P></SPAN><P class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; mso-pagination: none; mso-layout-grid-align: none; mso-char-indent-count: 2.0;"><shapetype id="_x0000_t75" stroked="f" filled="f" path="m@4@5l@4@11@9@11@9@5xe" opreferrelative="t" ospt="75" coordsize="21600,21600"><stroke joinstyle="miter"></stroke><formulas><f eqn="if lineDrawn pixelLineWidth 0"></f><f eqn="sum @0 1 0"></f><f eqn="sum 0 0 @1"></f><f eqn="prod @2 1 2"></f><f eqn="prod @3 21600 pixelWidth"></f><f eqn="prod @3 21600 pixelHeight"></f><f eqn="sum @0 0 1"></f><f eqn="prod @6 1 2"></f><f eqn="prod @7 21600 pixelWidth"></f><f eqn="sum @8 21600 0"></f><f eqn="prod @7 21600 pixelHeight"></f><f eqn="sum @10 21600 0"></f></formulas><path oconnecttype="rect" gradientshapeok="t" oextrusionok="f"></path><lock aspectratio="t" vext="edit"></lock></shapetype><shape id="_x0000_s1026" type="#_x0000_t75" style="MARGIN-TOP: 24.85pt; Z-INDEX: 1; LEFT: 0px; MARGIN-LEFT: 275pt; WIDTH: 195pt; POSITION: absolute; HEIGHT: 108.4pt; TEXT-ALIGN: left;"><imagedata otitle="" src="file:///C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\msohtml1\01\clip_image001.png"></imagedata><wrap type="square"></wrap></shape><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>(3)</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>如果该城市要在平直河岸</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>L(</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>设</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>L</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>位于横坐标轴</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>)</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>上建一抽水站</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>P</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>，供应同岸的</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>A</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>、</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>B</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>两个水厂。考虑到输水管道沿线地质情况等原因，假设在修建</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>OA</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>、</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>OB</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>、</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>OP</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>三段管道（如图</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>1</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>）时，每公里的耗资由相应的管道日供水量决定，参见表</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>2</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>。水厂按超额加价收取水费，即每户日基本用水量为</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>0.6 </SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>吨，每吨水费</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>1.2</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>元，超额用水量的水费按基本用水量的水价加价</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>20</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>％。试确定该城市将供水收益全部用于偿还修建</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>OA</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>、</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>OB</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>、</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>OP</SPAN><SPAN style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>三段管道投资费用的最优方案。</SPAN><SPAN lang="EN-US" style='FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'></P><P></P></SPAN><P></P><P class="MsoNormal" align="center" style="MARGIN: 6pt 0cm 0pt; TEXT-ALIGN: center; mso-para-margin-top: .5gd; mso-pagination: none; mso-layout-grid-align: none;"><B style="mso-bidi-font-weight: normal;"><SPAN lang="EN-US" style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'><SPAN style="mso-spacerun: yes;">
</SPAN></SPAN></B><B style="mso-bidi-font-weight: normal;"><SPAN style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>表</SPAN></B><B style="mso-bidi-font-weight: normal;"><SPAN lang="EN-US" style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>2</SPAN></B><B style="mso-bidi-font-weight: normal;"><SPAN style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'> 管道修建费用</SPAN></B><B style="mso-bidi-font-weight: normal;"><SPAN lang="EN-US" style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'></P><P></P></SPAN></B><TABLE class="MsoTableGrid" cellspacing="0" cellpadding="0" border="1" style="BORDER-RIGHT: medium none; BORDER-TOP: medium none; MARGIN: auto auto auto 145.4pt; BORDER-LEFT: medium none; BORDER-BOTTOM: medium none; BORDER-COLLAPSE: collapse; mso-border-alt: solid windowtext .5pt; mso-padding-alt: 0cm 5.4pt 0cm 5.4pt; mso-border-insideh: .5pt solid windowtext; mso-border-insidev: .5pt solid windowtext; mso-yfti-tbllook: 480;"><TBODY><TR style="mso-yfti-irow: 0; mso-yfti-firstrow: yes;"><TD valign="top" width="147" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 110pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt;"><P class="MsoNormal" align="center" style="MARGIN: 6pt 0cm 0pt; TEXT-ALIGN: center; mso-para-margin-top: .5gd; mso-pagination: none; mso-layout-grid-align: none;"><SPAN style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>日供水量（万吨）</SPAN><B style="mso-bidi-font-weight: normal;"><SPAN lang="EN-US" style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'></P><P></P></SPAN></B><P></P></TD><TD valign="top" width="173" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 130pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt;"><P class="MsoNormal" align="center" style="MARGIN: 6pt 0cm 0pt; TEXT-ALIGN: center; mso-para-margin-top: .5gd; mso-pagination: none; mso-layout-grid-align: none;"><SPAN lang="EN-US" style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>30 </SPAN><SPAN style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'> </SPAN><SPAN lang="EN-US" style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>40 <SPAN style="mso-spacerun: yes;">
</SPAN><SPAN style="mso-spacerun: yes;">
</SPAN>50 <SPAN style="mso-spacerun: yes;">
</SPAN><SPAN style="mso-spacerun: yes;">
</SPAN>80<B style="mso-bidi-font-weight: normal;"></P><P></P></B></SPAN><P></P></TD></TR><TR style="mso-yfti-irow: 1; mso-yfti-lastrow: yes;"><TD valign="top" width="147" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 110pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;"><P class="MsoNormal" align="center" style="MARGIN: 6pt 0cm 0pt; TEXT-ALIGN: center; mso-para-margin-top: .5gd; mso-pagination: none; mso-layout-grid-align: none;"><SPAN style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: "Courier New"; mso-hansi-font-family: "Courier New";'>每公里耗资（万元）</SPAN><B style="mso-bidi-font-weight: normal;"><SPAN lang="EN-US" style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'></P><P></P></SPAN></B><P></P></TD><TD valign="top" width="173" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #d4d0c8; WIDTH: 130pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt;"><P class="MsoNormal" align="center" style="MARGIN: 6pt 0cm 0pt; TEXT-ALIGN: center; mso-para-margin-top: .5gd; mso-pagination: none; mso-layout-grid-align: none;"><SPAN lang="EN-US" style='FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: "Courier New"; mso-bidi-font-family: "Times New Roman";'>50 <SPAN style="mso-spacerun: yes;">
</SPAN>65 <SPAN style="mso-spacerun: yes;">
</SPAN><SPAN style="mso-spacerun: yes;">
</SPAN>75 <SPAN style="mso-spacerun: yes;">
</SPAN>90<B style="mso-bidi-font-weight: normal;"></P><P></P></B></SPAN><P></P></TD></TR></TBODY></TABLE>大家一起交流一下，谢谢了 可以用 lingo 来做,但是未知量的个数好象不能太多,关键是得做一个好的模型 像这样的线性规划问题用matlab做也比较方便 用目标线性规划建立模型，再用lingo或者matlab求解
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