正确决策抢渡长江

The Correct Decision of Speedily Crossing Changjiang River

就抢渡长江问题,研究了抢渡者在速度大小保持不变的情况下,如何调整游泳方向最快到达对岸的方法.建立了最短时间到达目的地的优化数学模型,并针对不同的情况,做出了游泳者行进的速度方向变化图及最佳路线图.此模型可用于河流急救、快速渡船等实际问题中.

With regard to the problem of speedily crossing Changjiang River,the authors first study the method of how a swimmer adjusts his or her swimming direction on condition that his or her swimming speed is fixed,then they build an optimized mathematical model of arriving at the destination within the shortest time.In addition,they put forward the swimmer's optimal route chart and directional diagram of reaching the opposite bank of Changjiang River with the quickest speed.This model can be applied in practical problems such as first-aid in rivers,high-speed ferry etc.