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第203章 最优原则(2 / 2)

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陶礼的大脑在疯狂的运转着,一般而言,机动车的绿灯时间都要远长于行人的绿灯时间,具体的时间陶礼并不清楚,但是合理的假设也是行得通的。

“走南湖大道这条路,总共大约有10公里的路程,也是说,平均每2公里的地方会有一个红绿灯,车子走的都是市内道路,而且都是没有限速标志但是有标线的道路,根据法规要求,没有道路心线的道路,城市道路限速为每小时30公里,同方向只有1条机动车道的道路,城市道路限速为每小时50公里,这一轮路这两种道路都有,取平均车速10公里每小时。”

“算是不堵车,一路绿灯畅行,来回也需要半个小时,而且一路绿灯的概率仅为32/243,假设遇到红灯或者到达目的地时候,出租车才会停车,那么对于车子的停车次数,那么停车次数的分布列则是一个离散型的相互独立的概率问题,这样一来,停车次数的期望值是……355/243,每次停车的最长时间是20秒,这样一来,来回耗在等红灯的时间,大概还需要一分钟,再加现在是早高峰,必然堵车,很难在45分钟内赶回学校!”

陶礼在十几秒的时间里迅速的推翻了打车回家的方法,这样一来,只能骑自行车了!

“从人民路到解放大街,有一条小路,路没有红绿灯,单程只有8公里的路程,如果这个时候让家长拿准考证,同时骑着车,两个人朝着相反的方向行驶,这样每个人只需要骑行4公里,正常人骑自行车的速度大概在15到20公里每小时,算是最慢的15公里每小时,来回也只需要32分钟,如果再快一点,甚至不需要半小时,同时我现在骑着电动车从学校出发,到人民路只需要不到五分钟的时间,继续往前骑行,这样等到他拿到准考证,我能在他回来的路接他,用电动车的话,在九点之前必然能够到达学校!”

对,是骑车走小路!

在这电光火石的一分钟时间内,陶礼用自己所学的数学知识,完美的找到了破解当前难题的方法!

“小江,还记得我次带你回家的那条小路吧!骑自行车走那条小路,我会让你爸妈带着准考证也骑车走那条路,老师算过了,时间绝对够,你不要慌,不需要你骑得很急,只要你平常学时候再快一点行了,路小心。”陶礼迅速的对任长江说道,那条路,陶礼带着他走过好几次。

“知道了,陶老师。”任长江挂掉电话之后,立马骑着自行车朝着那条小道走去。

而陶礼则是第一时间拨通了任岩的电话,电话在嘟嘟嘟了几声之后,终于是接通了,“老哥,小江的准考证忘在家了,你找一找是不是在你周边?”

“什么!准考证没带?小菲,快看一下小江的准考证在哪里?”刚准备睡个回笼觉的任岩一下子被吓醒了,连忙对着屋外客厅的胡菲喊道。

“准考证?我找找看!”胡菲显然也是吓个不轻,连忙在客厅里找了起来。

“找到了,在客厅的茶几桌下面!”胡菲连忙喊道。

“老弟,准考证找到了,要我现在开车送过去吗?”任岩连忙问道。

“开车来不及了,现在正是早高峰,从你家到学校这条路本来最堵,更别说今天实行限行了!”陶礼摇了摇头说道。

喜欢陶礼满天下请大家收藏:陶礼满天下本站更新速度全网最快。

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