大家交流一下A题的答案!

Bolang8383 · 发表于 2005-9-22 18:48:37

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>第一问:综合评价,长江水质属于2类水
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>第二问:干流污染源:攀枝花,岳阳
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>第三问:2014年长江水质组成:1类水0%,2类水39%左右,三类水7%左右,4类水3%左右,5类水51%左右.具体的忘记了
第四问:处理污水是递增的,到2014年要处理230左右亿吨污水.
不知道大家的结果是怎样的呢?请交流交流!!!或者发邮件也可以:我的邮箱是:Bolang8383@yahoo.com.cn 
谢谢!!!

王鑫 · 发表于 2005-9-22 20:10:22

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>第四问我们为630

zhghan · 发表于 2005-9-22 22:19:01

<DIV class=quote>以下是引用Bolang8383在2005-9-22 10:48:37的发言： 
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>第一问:综合评价,长江水质属于2类水
<

>第二问:干流污染源:攀枝花,岳阳
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>第三问:2014年长江水质组成:1类水0%,2类水39%左右,三类水7%左右,4类水3%左右,5类水51%左右.具体的忘记了
第四问:处理污水是递增的,到2014年要处理230左右亿吨污水.
不知道大家的结果是怎样的呢?请交流交流!!!或者发邮件也可以:我的邮箱是:Bolang8383@yahoo.com.cn 
谢谢!!!</DIV>
你的第一问的说法本身是错误的, 第三的做法不合适,其它的这些数值结果都不能说明任何问题,主要是看建模方法. 很多人老有一个误区,好像数学建模就是看这些数字,实际上评卷时恰恰相反!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

lhb125 · 发表于 2005-9-23 03:17:41

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>你的第一问的说法本身是错误的, 第三的做法不合适,其它的这些数值结果都不能说明任何问题,主要是看建模方法. 很多人老有一个误区,好像数学建模就是看这些数字,实际上评卷时恰恰相反!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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>恩．不错～的确如此～～
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>结果是不重要的，重要的是思路～[em01]

Cauchy625 · 发表于 2005-9-23 07:04:49

<DIV class=quote>以下是引用zhghan在2005-9-22 14:19:01的发言： 
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>你的第一问的说法本身是错误的, 第三的做法不合适,其它的这些数值结果都不能说明任何问题,主要是看建模方法. 很多人老有一个误区,好像数学建模就是看这些数字,实际上评卷时恰恰相反!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!</DIV>
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>说的好，结果不是关键！主要看你的模型是不是合理的说！

sbngj1986 · 发表于 2005-9-23 17:09:16

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>我到是蛮同意

<SCRIPT language=javascript type=text/javascript> document.write (usercolor('11','Cauchy625')); </script>

复制代码

Cauchy625 的看法的
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>数学建模本来就不应该有什么正确的答案！！！
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>主要是看你的建模思想新颖和模型的实用性！！！
我们的建模不能只追求正确的答案！！！

retin · 发表于 2005-9-23 21:31:43

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>说说我看法：
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>首先，对于第一问，长江综合评价，用一个整体的水质评价是不太妥当的（我用语缓和点），应为在水利上评价一个河流整体的状况不适合用几个检测站的数据综合起来，然后得到其应该的等级，但是如果你不表述其等级，那也许可以。（从一个搞水利水文检测的专家那边得到的表述）也就是说，你定性地表述长江水质种类不太好。最好用一个评价的函数来比价长江每个月的状况。当然如果对于一个水文年的就单单一个检测站，那么国家通用的办法就是求平均值（也是出与水文专家）
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>另外
1．CODMn污染严重地区及月份
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站点号</TD>
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3—4</TD>
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2—3</TD>
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4—5</TD></TR>
<TR 1">
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主要污染段</TD>
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湖北宜昌至湖南岳阳</TD>
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重庆朱沱至湖北宜昌</TD>
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湖南岳阳至江西九江</TD></TR>
<TR 2">
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主要污染源</TD>
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岳阳洞庭湖出口</TD>
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重庆下游</TD>
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岳阳洞庭湖出口</TD></TR>
<TR 3; mso-yfti-lastrow: yes">
<TD windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #d4d0c8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 99.25pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" width=132>
污染严重月份</TD>
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04年5月至05年4月</TD>
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04年5月至04年10月</TD>
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04年4，5月及05年2月</TD></TR></TABLE></DIV>

retin · 发表于 2005-9-23 21:36:25

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0cm 0cm 0pt; TEXT-ALIGN: center" align=center>2．NH3-N污染严重地区及月份
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0cm 0cm 0pt; TEXT-ALIGN: center" align=center>站点号</TD>
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0cm 0cm 0pt; TEXT-ALIGN: center" align=center>3—4</TD>
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1—2</TD>
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2—3</TD>
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4—5</TD></TR>
<TR 1">
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主要污染段</TD>
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湖北宜昌至湖南岳阳</TD>
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四川攀枝花至重庆朱沱</TD>
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重庆朱沱至湖北宜昌</TD>
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湖南岳阳至江西九江</TD></TR>
<TR 2">
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主要污染源</TD>
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长沙新港</TD>
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乐山，泸州</TD>
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重庆</TD>
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南昌（赣江）</TD></TR>
<TR 3; mso-yfti-lastrow: yes">
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污染严重月份</TD>
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04年5月至05年4月</TD>
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04年12月至05年4月</TD>
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04年6月及04年9月</TD>
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04年4月及04年9月</TD></TR></TABLE></DIV>
这个是我们的污染源表述，各有不同。

thieflqy · 发表于 2005-10-5 18:54:13

8楼的，好兄弟，找到知音了[em01][em01][em01][em01][em01][em01][em01][em01][em01][em01][em01][em01][em01][em01][em07]

Lf832003 · 发表于 2005-10-5 19:34:43

我们不追求正确答案，可是评委不这么看，中国建模就是这样，有什么办法？

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