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1、2011年大学生数学建模竞赛B题参考答案1.1A区管辖范围分配A区服务平台编号(n)平台坐标所管辖区域内节点(i)1(413,359)1,67,68,69,71,73,74,75,76,782(403,343)2,39,40,43,44,70,723(383.5,351)3,54,55,65,664(381,377.5)4,57,60,62,63,645(339,376)5,49,50,51,52,53,56,58,596(335,383)67(317,362)7,30,32,47,48,618(334.5,353.5)8,33,469(333,342)9,31
2、,34,35,4510(282,325)1011(247,301)11,26,2712(219,316)12,2513(225,270)13,21,22,23,2414(280,292)1415(290,335)15,28,2916(337,328)16,36,37,3817(415,335)17,41,4218(432,371)18,80,81,82,8319(418,374)19,77,7920(444,394)20,84,85,86,87,88,89,91,921.2重要关口平台调度交通要道编号被调度平台编号距离(mm)时间(min)12120.0000.
3、000141667.4176.74216915.3251.533211432.6503.265221077.0797.70823135.0000.500241138.0533.805281547.5184.75229780.1558.01530830.6083.06138239.8223.98248524.7582.4766243.5000.3501.3增设平台方案增加平台数增加方案均值(量)方差(均衡)二者的平均056.6047544.5062750.5555112847.7546041.1907844.472692283841.4332936.7112639
4、.07227328388736.9096132.2799634.5947842838598733.9884427.1588530.573655283850658729.8848724.7142127.299542.1平台调整方案区域增设方案增设前增设后Q值s值Q值s值A56.60544.50656.60544.506B102,116,126,150103.27971.34240.12430.168C200,209,242,247,261,269,280,288,299,316211.889172.91781.92139.579D331,336,354113.38
5、2102.57666.07264.709E388,392,409,410,419,452,468180.504189.68075.59657.980F491,505,520,536,559,573201.491130.82790.55839.3502.2最佳围堵方案考虑逃逸速度在警车速度之内(即60km/h),其他可类推。先有距P3公里以内的路口有:节点号7893031323334353645464748距P的值11.413.417.717.211.70.05.112.721.926.928.622.724.224.3再据以上表分析围堵方案:以上的围堵,能保证犯
6、罪分子不能跑到B、D、E、F区。最后主要考虑C区情况。犯罪分子从A区进入C区的路口编号是30、48。