重筑万里长城---> 把我们的血肉，筑成我们新的长城！

FreddyMusic

重铸万里长城---> 把我们的血肉，筑成我们新的长城！

http://demonstrations.wolfram.com/ReconstructionOfTheGreatWall/




Historically, the Great Wall stretches over approximately 6,400 km in total from Shanhaiguan pass in the east to Jayu pass in the west, along a rough arc.
After hundreds of years of natural corrosion and human activity, the Great Wall is vanishing. A survey shows 20% of it is in ruins and another 50% has already disappeared.
This Demonstration shows a method for re-construction the Great Wall by using minimum spanning tree from the remaining GPS points, following  3772 km.

Graphic shows random select points are connected as minimum spanning tree by Kruskal's Algorithm,as method for re-construction the Great Wall with remaining historical section.
Snapshot 1: 10 random points ( occupy 10.9 % ) connected length is 1977 km. Most of remaining GPS points are distributed in the north of Beijing.
Snapshot 2: 46 random points ( occupy 50 % )  connected length is 3494 km as minimum spanning tree of the great wall.
Snapshot 3: 92 all existing points  ( occupy 100 % )  results the maximum length of 3772 km.
Initial location data of The Great Wall is based on GPS coordinate points from "Google Earth" .
For more information on "The Great Wall of China", see the Wikipedia entry.

[ 本帖最后由 FreddyMusic 于 2008-8-14 19:04 编辑 ]

FreddyMusic

new arrived

aba_aba

原来长城还跨了海啊

FreddyMusic

长城跨海是不对的。

历史上东北的长城从中国和朝鲜边境开始，转到吉林省境内，再在到河北。

但是战火和历史已使得东北的长城仅存，“中国和朝鲜段”了。

所以现象用计算机模拟，就直接“中国和朝鲜段”和“山海关”连了起来，这也是无奈。

小林1981

我怎么 看不懂呢，烦请楼主解释一下，做这个的目的是什么呢/？
是什么意思呢？谢谢!

FreddyMusic

search internet, goverment would like to pay 2 billion for clearly information the remaining length of great wall.

I would like to help them for save the invest to 2 million maybe.

FreddyMusic

new and published.
http://demonstrations.wolfram.com/ReconstructionOfTheGreatWall/

I thanks for demonstration team's comments.

waynebuaa

:hug:
FreddyMusic 好棒耶