2008年全国第五届研究生数学建模竞赛优秀论文

dynamic · 发表于 2010-9-6 18:22:39

A题汶川地震中唐家山堰塞湖泄洪问题

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题目：汶川地震中唐家山堰塞湖水位高程--蓄水量最优拟合模型

作者：肖宏伟

学校：北京化工大学经济管理学院

摘要：本文通过对数字高程模型的布尔操作，确定了唐家山堰塞湖的湖区覆盖面及堰坝确切位置。然后对湖区按湖底高程进行划分，建立了湖区分段线性水面线模型。再由湖区网格乘以水深的累加，建立以水位高程-蓄水量模型得到数据，运用线性与非线性相结合逐步回归选出水位高程与蓄水量之间的最优拟合数学模型。

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水位高程_蓄水量最优拟合模型.pdf (369.24 KB, 下载次数: 338)

Cdmlnh94 · 发表于 2018-6-30 01:21:34

The Senate bill now goes to the full chamber for consideration.
Sen. Ryan Silvey,Gordon Hayward Jersey, R-Kansas City, sponsored the bill that limits Nixon's bonding authority.
A House panel is examining the economic benefits of having an NFL team in St. Louis. Missouri economic development officials presented a report Monday that concluded building a new football stadium in St. Louis could bring nearly $300 million in net sales tax revenues to the state over the next 30 years,Arian Foster Dolphins Jersey. Republican lawmakers were skeptical of that report.
Officials are concerned about the team moving because Rams owner Stan Kroenke is working to build a new Los Angeles stadium. In January, the team went year-to-year on the lease for the Edward Jones Dome,2018 NFL Draft Jersey, which the state is still paying for.
JEFFERSON CITY, Mo. (AP) ??” A measure limiting Democratic Gov. Jay Nixon's ability to use bond money to pay for a new St. Louis football stadium won approval in a Senate committee Wednesday.
The governor told reporters last month that having an NFL team in St. Louis is important for the city and the state but that he won't put any new burden on taxpayers to pay for a new stadium. He said he's committed to getting private investments to help pay for it.
Nixon has touted his efforts to broker agreements with labor unions to work around-the-clock without overtime and relocate infrastructure to prepare the way for a new stadium in St. Louis along the Mississippi River.
The bill would stop the state from extending or issuing new bonds without approval from the Legislature of voters,Calvin Ridley Jersey. Members of Nixon's administration have said he has the authority to extend payments on the existing Edward Jones Dome in St,Cristian Pavon Jersey. Louis to pay for a new dome with hopes of enticing the Rams to stay or attracting a new team.
"I don't believe that one person should be able to put the state $200 million in debt,Brett Favre Falcons Jersey," Silvey said.

hedef · 发表于 2017-3-24 16:22:09

五届研究生数学建

dynamic · 发表于 2010-9-6 18:28:50

B题城市道路交通信号实时控制问题

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题目：城市道路交通信号实时控制问题

作者：董林孙健张翠翠

学校：上海工程技术大学

摘要： 摘要.jpg

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2008年 B题城市道路交通信号实时控制问题.pdf (993.05 KB, 下载次数: 448)

dynamic · 发表于 2010-9-6 18:34:49

C题货运列车的编组调度问题

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题目：货运列车的编组调度问题（含程序代码）

作者：

学校：

摘要：本文研究的是货运列车的编组调度问题，评价调度方案的优劣标准主要有车辆的平均中时大小和列车的满轴与否。
问题一，首先给出现有模型，然后将中时最小目标等价转为车辆驶出最多，建立了新的模型-最多车辆驶出模型，并给出求解模型的算法-分方向剪枝搜索算法。
问题二，在问题一的模型和算法基础上加入如下限制条件：对发往1 S站点的车、军用货车和赈灾专车进行单独优先考虑。
问题三，在问题一的模型和算法基础上利用未来两小时的信息来增大算法的搜索深度，从而提高编组方案的效率。
问题四，把目的地为1 23 S S S 以远西以及以远，，站点的车辆改为到达4 E 以南站点，利用问题一的模型和算法进行求解。
问题五，在需要解体列车时，当到达场均满负荷（即停有 12列车）时资源利用率和效率最高，利用问题一模型和算法求解得最多能编11970 辆。
问题六，我们针对模型中的弱点针对性的提出了改进方向。
本文的创新点为：将整个列车看作彼此独立的东南西北四个部分，简化计算；将中时最少的目标转化为最大驶出车辆数，利于建模和求解；采用合理的剪枝策略，降低算
法的复杂度；引入了机器学习策略。

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2008 C题货运列车的编组调度问题.rar (1.26 MB, 下载次数: 653)

rong1208 · 发表于 2010-9-7 18:53:31

为什么没有资源呢。下到百分之一点几久停了。

Elina · 发表于 2010-9-15 10:34:20

谢谢版主提供的资料！

Elina · 发表于 2010-9-15 10:45:04

谢谢版主，我找了好久才找到的！

Elina · 发表于 2010-9-15 16:07:53

回复 6# Elina

谢谢楼主分享！我找了好久

dutdong · 发表于 2010-10-5 18:02:39

其实我一直觉得楼主的品味不错！呵呵！
MATLAB技术论坛，我的最爱！

kydddddd · 发表于 2011-6-23 19:15:26

楼主好人谢谢楼主帮了大忙了

midspace · 发表于 2011-9-21 18:18:59

多谢分享...> 好人...

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