2007年电工大学生数学建模竞赛程序答疑处 - 第5页 - 全国大学生电工数模竞赛(EMCM) - 数学建模社区-数学中国

邹晶晶 发表于 2007-11-23 14:08

表
3
机组初始状态<div align="center"><table class="MsoNormalTable" cellspacing="0" cellpadding="0" border="1" style="BORDER-RIGHT: medium none; BORDER-TOP: medium none; BORDER-LEFT: medium none; BORDER-BOTTOM: medium none; BORDER-COLLAPSE: collapse; mso-border-top-alt: solid windowtext .5pt; mso-border-bottom-alt: solid windowtext .5pt; mso-padding-alt: 0cm 5.4pt 0cm 5.4pt; mso-border-insidev: .5pt solid windowtext;"><tbody><tr style="HEIGHT: 11.65pt; mso-yfti-irow: 0; mso-yfti-firstrow: yes;"><td valign="top" style="BORDER-RIGHT: #f0f0f0; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #f0f0f0; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 11.65pt; BACKGROUND-COLOR: transparent; mso-border-top-alt: solid windowtext .5pt; mso-border-bottom-alt: solid windowtext .5pt;">机组</td><td valign="top" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #f0f0f0; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 11.65pt; BACKGROUND-COLOR: transparent; mso-border-top-alt: solid windowtext .5pt; mso-border-bottom-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt;">状态小时数</td><td valign="top" style="BORDER-RIGHT: #f0f0f0; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #f0f0f0; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 11.65pt; BACKGROUND-COLOR: transparent; mso-border-top-alt: solid windowtext .5pt; mso-border-bottom-alt: solid windowtext .5pt;">兆瓦(MW)</td></tr><tr style="mso-yfti-irow: 1;"><td valign="top" style="BORDER-RIGHT: #f0f0f0; PADDING-RIGHT: 5.4pt; BORDER-TOP: #f0f0f0; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #f0f0f0; PADDING-TOP: 0cm; BORDER-BOTTOM: #f0f0f0; BACKGROUND-COLOR: transparent; mso-border-top-alt: solid windowtext .5pt;">G1</td><td valign="top" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #f0f0f0; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #f0f0f0; PADDING-TOP: 0cm; BORDER-BOTTOM: #f0f0f0; BACKGROUND-COLOR: transparent; mso-border-top-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt;">运行2小时</td><td valign="top" style="BORDER-RIGHT: #f0f0f0; PADDING-RIGHT: 5.4pt; BORDER-TOP: #f0f0f0; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #f0f0f0; PADDING-TOP: 0cm; BORDER-BOTTOM: #f0f0f0; BACKGROUND-COLOR: transparent; mso-border-top-alt: solid windowtext .5pt;">100</td></tr><tr style="mso-yfti-irow: 2; mso-yfti-lastrow: yes;"><td valign="top" style="BORDER-RIGHT: #f0f0f0; PADDING-RIGHT: 5.4pt; BORDER-TOP: #f0f0f0; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #f0f0f0; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-bottom-alt: solid windowtext .5pt;">G2</td><td valign="top" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #f0f0f0; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #f0f0f0; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-bottom-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt;">关机3小时</td><td valign="top" style="BORDER-RIGHT: #f0f0f0; PADDING-RIGHT: 5.4pt; BORDER-TOP: #f0f0f0; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #f0f0f0; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-bottom-alt: solid windowtext .5pt;">0</td></tr></tbody></table></div>这是什么意思啊？是不是在研究的这四个小时之前G1已经运行了两个小时？而G2已经关闭了三个小时？

ssddee 发表于 2007-11-23 14:30

老师好：B题中各问要求的一月份供水量是指什么？是一月份每天的供水量，还是该月总的供水量？谢谢！

100860 发表于 2007-11-23 14:55

<div>我们对b题进行分析，温度对供水量没有任何关系，到底有什么用？？？/????</div>

100860 发表于 2007-11-23 14:57

<div>我们对b题进行分析，温度对供水量没有任何关系，到底有什么用？？？/????</div>

moqix 发表于 2007-11-23 16:30

请问A题中118节点系统的数据中的IEEE118BusData\i_MonitoredLines.xml里的branchnum="4"><pmax>200,200,200,200</pmax>是什么意思啊？为什么在118节点系统中只有4个输电线路最大传输容量？是指哪个还是哪些节点上的传输容量？branchnum又具体指什么？谢谢~~~~~~~~~~~~~~~~~~

fixmezhu 发表于 2007-11-23 17:57

问题好多...

赵军发表于 2007-11-23 18:13

各位参赛同学应该认真读题，审题，对题目中不明白的问题要举一反三，没有说题中给的数据都是正确的，也没有说题中所给数据都是有用的，也没有说只能用题中所给的数据……

88635645 发表于 2007-11-23 18:17

<div align="center"><table class="MsoNormalTable" cellspacing="0" cellpadding="0" border="1" style="BORDER-RIGHT: medium none; BORDER-TOP: medium none; BORDER-LEFT: medium none; BORDER-BOTTOM: medium none; BORDER-COLLAPSE: collapse; mso-border-top-alt: solid windowtext .5pt; mso-border-bottom-alt: solid windowtext .5pt; mso-padding-alt: 0cm 5.4pt 0cm 5.4pt; mso-border-insidev: .5pt solid windowtext;"><tbody><tr style="mso-yfti-irow: 0; mso-yfti-firstrow: yes;"><td valign="top" style="BORDER-RIGHT: #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent; mso-border-top-alt: solid windowtext .5pt;">机组</td><td valign="top" 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; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent; mso-border-top-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt;">启动成本(￥)</td><td valign="top" style="BORDER-RIGHT: #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent; mso-border-top-alt: solid windowtext .5pt;">空载成本(￥)</td><td valign="top" style="BORDER-RIGHT: #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent; mso-border-top-alt: solid windowtext .5pt;">增量发电量(MWh)</td><td valign="top" style="BORDER-RIGHT: #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent; mso-border-top-alt: solid windowtext .5pt;">增量成本(￥/MWh)</td></tr><tr style="mso-yfti-irow: 1;"><td valign="top" style="BORDER-RIGHT: #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent; mso-border-top-alt: solid windowtext .5pt;">G1</td><td valign="top" 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; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent; mso-border-top-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt;">350</td><td valign="top" style="BORDER-RIGHT: #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent; mso-border-top-alt: solid windowtext .5pt;">100</td><td valign="top" style="BORDER-RIGHT: #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent; mso-border-top-alt: solid windowtext .5pt;">100,100</td><td valign="top" style="BORDER-RIGHT: #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; PADDING-TOP: 0cm; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent; mso-border-top-alt: solid windowtext .5pt;">10,14</td></tr><tr style="mso-yfti-irow: 2; mso-yfti-lastrow: yes;"><td valign="top" style="BORDER-RIGHT: #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-bottom-alt: solid windowtext .5pt;">G2</td><td valign="top" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-bottom-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt;">100</td><td valign="top" style="BORDER-RIGHT: #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-bottom-alt: solid windowtext .5pt;">200</td><td valign="top" style="BORDER-RIGHT: #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-bottom-alt: solid windowtext .5pt;">60,40</td><td valign="top" style="BORDER-RIGHT: #ece9d8; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ece9d8; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-bottom-alt: solid windowtext .5pt;">12,15</td></tr></tbody></table></div>表中增量发电量中100,100对应的增量成本10,14有没有错误啊

赵军发表于 2007-11-23 18:17

<div class="msgheader">QUOTE:</div><div class="msgborder">以下是引用邹晶晶在2007-11-23 14:08:20的发言： 表 3 机组初始状态
<div align="center"><table class="MsoNormalTable" cellspacing="0" cellpadding="0" border="1" style="BORDER-RIGHT: medium none; BORDER-TOP: medium none; BORDER-LEFT: medium none; BORDER-BOTTOM: medium none; BORDER-COLLAPSE: collapse; mso-border-top-alt: solid windowtext .5pt; mso-border-bottom-alt: solid windowtext .5pt; mso-padding-alt: 0cm 5.4pt 0cm 5.4pt; mso-border-insidev: .5pt solid windowtext;"><tbody><tr style="HEIGHT: 11.65pt; mso-yfti-irow: 0; mso-yfti-firstrow: yes;"><td valign="top" style="PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; BORDER-LEFT-COLOR: #f0f0f0; PADDING-BOTTOM: 0cm; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 11.65pt; BACKGROUND-COLOR: transparent; BORDER-RIGHT-COLOR: #f0f0f0; mso-border-top-alt: solid windowtext .5pt; mso-border-bottom-alt: solid windowtext .5pt;">机组</td><td valign="top" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; BORDER-LEFT-COLOR: #f0f0f0; PADDING-BOTTOM: 0cm; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 11.65pt; BACKGROUND-COLOR: transparent; mso-border-top-alt: solid windowtext .5pt; mso-border-bottom-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt;">状态小时数</td><td valign="top" style="PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; BORDER-LEFT-COLOR: #f0f0f0; PADDING-BOTTOM: 0cm; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; HEIGHT: 11.65pt; BACKGROUND-COLOR: transparent; BORDER-RIGHT-COLOR: #f0f0f0; mso-border-top-alt: solid windowtext .5pt; mso-border-bottom-alt: solid windowtext .5pt;">兆瓦(MW)</td></tr><tr style="mso-yfti-irow: 1;"><td valign="top" style="PADDING-RIGHT: 5.4pt; PADDING-LEFT: 5.4pt; BORDER-LEFT-COLOR: #f0f0f0; BORDER-BOTTOM-COLOR: #f0f0f0; PADDING-BOTTOM: 0cm; BORDER-TOP-COLOR: #f0f0f0; PADDING-TOP: 0cm; BACKGROUND-COLOR: transparent; BORDER-RIGHT-COLOR: #f0f0f0; mso-border-top-alt: solid windowtext .5pt;">G1</td><td valign="top" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; PADDING-LEFT: 5.4pt; BORDER-LEFT-COLOR: #f0f0f0; BORDER-BOTTOM-COLOR: #f0f0f0; PADDING-BOTTOM: 0cm; BORDER-TOP-COLOR: #f0f0f0; PADDING-TOP: 0cm; BACKGROUND-COLOR: transparent; mso-border-top-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt;">运行2小时</td><td valign="top" style="PADDING-RIGHT: 5.4pt; PADDING-LEFT: 5.4pt; BORDER-LEFT-COLOR: #f0f0f0; BORDER-BOTTOM-COLOR: #f0f0f0; PADDING-BOTTOM: 0cm; BORDER-TOP-COLOR: #f0f0f0; PADDING-TOP: 0cm; BACKGROUND-COLOR: transparent; BORDER-RIGHT-COLOR: #f0f0f0; mso-border-top-alt: solid windowtext .5pt;">100</td></tr><tr style="mso-yfti-irow: 2; mso-yfti-lastrow: yes;"><td valign="top" style="PADDING-RIGHT: 5.4pt; PADDING-LEFT: 5.4pt; BORDER-LEFT-COLOR: #f0f0f0; PADDING-BOTTOM: 0cm; BORDER-TOP-COLOR: #f0f0f0; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; BORDER-RIGHT-COLOR: #f0f0f0; mso-border-bottom-alt: solid windowtext .5pt;">G2</td><td valign="top" style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; PADDING-LEFT: 5.4pt; BORDER-LEFT-COLOR: #f0f0f0; PADDING-BOTTOM: 0cm; BORDER-TOP-COLOR: #f0f0f0; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-bottom-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext .5pt;">关机3小时</td><td valign="top" style="PADDING-RIGHT: 5.4pt; PADDING-LEFT: 5.4pt; BORDER-LEFT-COLOR: #f0f0f0; PADDING-BOTTOM: 0cm; BORDER-TOP-COLOR: #f0f0f0; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; BORDER-RIGHT-COLOR: #f0f0f0; mso-border-bottom-alt: solid windowtext .5pt;">0</td></tr></tbody></table></div>这是什么意思啊？是不是在研究的这四个小时之前G1已经运行了两个小时？而G2已经关闭了三个小时？</div>我的看法：电力系统的供电是周而复始的，在某一研究时间段初当然需要有供电机组供电，不然整个电力系统不久崩溃了！

ssddee 发表于 2007-11-23 18:22

B题是求一月份总供水量，还是一月份每天的供水量？数据中的温度显示0是否意味着温度数据未知?

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