来源：北京青年报 source:Beijing youth daily

受建模竞赛题目启发 为测算算法模型准确度 Inspired by the modeling contest subject for measuring algorithm model accuracy

　　本报讯 从今日早晨5时15分起，微博网友“火星铁粉”将与他的一名室友一起，用2元钱17个小时，坐遍北京地铁。宣布这个计划的微博已经被转发了上百次，而一套详细的计划时间表和路线图也让人惊叹。

Report from our correspondent from this day at 5 in the morning 15 points up,Micro bo net friend"Mars iron powder"And he will be a roommate together,2 yuan 17 hours,Sit through Beijing subway.Announced the plan of the micro bo has been forwarding the hundreds of times,And a detailed schedule and map is amazing.

　　“火星铁粉”是个博士生，专攻计算机软件。他说，他最初萌生坐遍北京地铁的想法，只是因为前不久的一次建模竞赛中的一道题目。这道题目就是设计一个程序，通过算法模型算出坐遍北京地铁的方式。

"Mars iron powder"Is a doctoral student,Specialize in computer software.He said,He first initiation sit through the idea of Beijing metro,Just because a shortly before the contest in modeling a topic.This problem is to design a program,Through the algorithm model to calculate sit through the way of Beijing metro.

　　“我们借鉴了当时第一名的算法，做了一些调整，就是现在这个计划时间表和路线图，”他说，在预算2元钱的限制下，虽然个别站点有重复，但这趟路线将经过北京地铁除机场线外的所有站点。“火星铁粉”根据地铁发车班次以及网上查询到的换乘时间，计划从5时15分坐上房山线开始，每条线路如何乘坐，用多久时间，都精确到分钟。例如9时39分乘坐1号线从苹果园出发向古城方向坐到四惠东。在路线图上，两人计划在21时55分到达亦庄线终点站次渠，从出发到结束，时间刚好是17个小时，基本覆盖了地铁全部运营时间。

"At that time we can use for reference the first algorithm,Do some adjustment,Now the schedule and the roadmap,"He said,2 yuan of money in the budget constraints,Although individual site has repeated,But on this route will be after Beijing subway in addition to the airport line all the sites."Mars iron powder"According to the departure flight and online inquiry to transfer time,Plan from 5 to 15 points on the line started well,Each line how to take,For how long time,Are accurate to the minutes.Such as 9 when the 39 points on line 1 apple from start to the ancient city of direction to sit to four huidong.On the map,Two people in the 21st plan when going to 55 points at the terminal of time channel,From the start to the end,Time is just 17 hours,Covering the basic operation of all the time.

　　“火星铁粉”希望用这次经历体验下17个小时连续乘坐地铁的感受，同时测算下模型的准确度。“另外还能亲自看一下各个换乘站，换乘用的时间。”他说。“如果时间有误差，晚上能坐多少就坐多少吧。”不过，“这次主要是体验一下新线和郊区线，其他线基本都坐过了。”他说。

"Mars iron powder"Want to use the experience under 17 hours continuous by subway feelings,At the same time, the accuracy of the measurement model."Also can personally see each transfer station,Change with time."He said."If time is error,How much can sit in the evening how much it sitting."but,"This is a major new experience and suburban line,Other basic line in the."He said.

　　昨晚，“火星铁粉”已经与室友到达位于房山线尽头的苏庄站附近并安顿下来。

Last night,"Mars iron powder"Have and roommate arrive at the well at the end of the line SuZhuang station nearby and settle down.