http://www.cad.zju.edu.cn/home/zhx/FAVM/1.pdf
最速降线(brachistochrone)问题
1048698;问题的设定:
1048698;设点A与原点重合,点B的坐标是(a,b),重物从A点下落到P(x,y)点时,其速度是v
1048698;重物质量是m,加速度是g
1048698;从A到P点时:
1048698;失去的势能是mgy
1048698;获得的动能是mv2/2
1048698;由能量守恒
o
x
yA
BP(x,y)v2vgy=
从A到P点时:失去的势能是mgy,获得的动能是mv2/2 由能量守恒
所有跟帖:
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Tom Kloza,they had long commodities/short dollar positions and w
-marketreflections-
♂
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11/27/2009 postreply
13:10:31