标题: 一道2010建模培训题 [打印本页] 作者: w77603423 时间: 2010-7-25 12:38 标题: 一道2010建模培训题 大家都来探讨下吧- z( s/ i, Q. L m$ A
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Two listening posts 5.43 miles apart pick up a brief radio signal. The sensing devices were oriented at 110° and 119°, respectively, when the signal was detected (see Figure 1); and they are accurate to within 2°. The signal came from a region of active drug exchange, and it is inferred that there is a powerboat waiting for someone to pick up drugs. It is dusk, the weather is calm, and there are no currents. A Small helicopter leaves a pad from Post 1 and is able to fly accurately along the 110° angle direction. The helicopter’s speed is three times the speed of the boat. The helicopter will be heard when it gets within 500 ft of the boat. This helicopter has only one detection device, a searchlight. At 200 ft, it can just illuminate a circular region with a radius of 25ft. 0 d6 M+ Y# z" ~3 f7 q4 Z
- L% I& g8 ?0 A' m: u% K3 S3 cFigure 1. Geometry of the problem.• Describe the (smallest) region where the pilot can expect to find the waiting boat.• Develop an optimal search method for the helicopter.Use a 95% confidence level in your calculations. 6 T0 z4 o2 d; r! i J- S' p' d' N作者: w77603423 时间: 2010-7-25 12:39
我晕···题目怎么出现个偷笑的表情····作者: 紫辰 时间: 2010-7-25 16:21
好像在哪见过啊？？？？？; s& W) E0 v; S y6 B4 E 作者: w77603423 时间: 2010-7-25 20:07 回复 紫辰 的帖子 ; B6 R( n8 O. }0 {% Q一种类型而已 呵呵 老师给的 也不知道从哪弄来的····2 F, Y$ s, X4 D% T) \( e
; m. f: b U8 ~. L' x/ e# A 作者: y.fcc 时间: 2010-7-26 11:37
那个表情是系统自定义的表情快捷键作者: 一粒芥菜 时间: 2010-8-30 09:33
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