1999年美国中学生数学建模试题及特等奖论文下载 HiMCM Outstanding Papers
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<P align=center><FONT face=Tahoma><FONT size=6>1999 HiMCM Problem <BR></FONT><B><FONT size=6>Traffic Lights</FONT></B></FONT></P></TD></TR>
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<TD width="52%"><FONT face=Tahoma><BR>Problem:</FONT><FONT face="MS Mincho"><FONT style="FONT-SIZE: 12pt"><FONT face=Tahoma>Major thoroughfares in big cities are usually highly congested. Traffic lights are used to allow cars to cross the highway or to make turns onto side streets. During commuting hours, when the traffic is much heavier than on any cross street, it is desirable to keep traffic flowing as smoothly as possible. Consider a 2 mile stretch of a major thoroughfare with cross streets every city block. Build a mathematical model that satisfies both the commuters on the thoroughfare as well as those on the cross streets trying to enter the thoroughfare as a function of the traffic lights. Assume there is a light at every intersection along your 2 mile stretch.</FONT></FONT></FONT><BR><FONT face="MS Mincho"><FONT style="FONT-SIZE: 12pt"><FONT face=Tahoma>First, you may assume the city blocks are of constant length. You may then wish to generalize to blocks of variable length.</FONT></FONT></FONT><BR></TD></TR></TBODY></TABLE>
kankna
dddddddddddddddddd 翻译一下:) 顶一下！好东西搬走！ 有中文的就更好了。多谢 1# huashi3483
我想获得资料啊
可是我也不知道说些什么呢
提一个问题：
请问：
立一个杆子在操场上，那么杆子的顶端影子所画出的曲线什么？ 这么不人道的政策啊
我想要资料 好！！！！！！ 好！！！！！！ 顶.................好