Re: [新聞] 印裔16歲天才 解開牛頓350年難題
udn應該是抄這篇dailymail
http://0rz.tw/WsrbF 一篇很沒內容的文章 下面推文一堆人吐槽到底是甚麼問題
所以... dailymail應該是抄這篇
http://0rz.tw/bM9Vz 這篇也沒甚麼內容...
Dresden的科展比賽
http://0rz.tw/iKHbg
by google translate 德轉英
Analytical solution of two fundamental unsolved problems of particle dynamics
Two problems in classical mechanics have withstood several centuries of
mathematical endeavor. The first problem is therefore to calculate the
trajectory of a body thrown at an angle in the Earth's gravitational field
and Newtonian flow resistance. The underlying power law was discovered by
Newton (17th century). The second problem is the objective description of a
particle-wall collision under Hertzian collision force and linear damping.
The collision energy was derived in 1858 by Hertz, a linear damping force has
Stokes (1850) is known. This paper has so far only the analytical solution of
this approximate or numerical targets for the problems solved. First, the two
problems are solved fully analytically. For the first problem will be
investigated further using the analytical solution, the physical behavior of
the system and set up outline solutions for generalized models. For the
second problem is carried out in order to increase efficiency and convergence
control a semi-analytical optimization. Finally, the analytical results are
compared with numerical solutions so as to validate accuracy and convergence
to numerically.
Hertz和stokes兩位大神似乎有涉入
這是他的解
http://0rz.tw/8YxdX
(量綱好像有點怪..)
g^2/2u^2 + (alpha*g/2)( (v*(v^2+u^2)^0.5)/u^2 + arcsinh|v/u| ) = const.
詳細的微分方程我查了幾個德文網站都找不到
但是應該有人可以用photoshop試著放大照片上的科展壁報
http://0rz.tw/5lnS6
http://0rz.tw/pi4lJ
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※ 編輯: henrypinge 來自: 140.113.91.106 (05/27 16:04)
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