Math 版 (精华区)
发信人: wanderer (海王星的小鱼), 信区: Math
标 题: Nonlinear Science FAQ(22)
发信站: 紫 丁 香 (Mon May 15 21:51:19 2000), 转信
What are simple experiments to demonstrate chaos?
There are many "chaos toys" on the market. Most consist of some sort
of pendulum that is forced
by an electromagnet. One can of course build a simple double pendulum to
observe beautiful
chaotic behavior see
<http://www.ibm.com/stretch/EOS/chaos.html> Double Pendulum
<http://www.phys.ttu.edu/~peters/pend.htm> Experimental Pendulum
Designs
<http://monet.physik.unibas.ch/~elmer/pendulum/> Java Applets Pendulum
Lab
My favorite double pendulum consists of two identical planar pendula, so
that you can
demonstrate sensitive dependence [2.10], for a Java applet simulation
see
<http://www.cs.mu.oz.au/~mkwan/pendulum/pendulum.html>. Another cute toy
is the "Space
Circle" that you can find in many airport gift shops. This is
discussed in the article:
A. Wolf & T. Bessoir, Diagnosing Chaos in the Space Circle, Physica 50D,
1991.
One of the simplest chemical systems that shows chaos is the
Belousov-Zhabotinsky reaction. The
book by Strogatz [4.1] has a good introduction to this subject,. For the
recipe see
<http://jcbmac.chem.brown.edu/scissorsHtml/circadian/Zabelusov/belosov.
html>.
Chemical chaos is modeled (in a generic sense) by the "Brusselator"
system of differential
equations. See
Nicolis, Gregoire & Prigogine, (1989) Exploring Complexity: An
Introduction W. H.
Freeman
The Chaotic waterwheel, while not so simple to build, is an exact
realization of Lorenz famous
equations. This is nicely discussed in Strogatz book [4.1] as well.
Billiard tables can exhibit chaotic motion, see
<http://www.maa.org/mathland/mathland_3_3.html>, though it might be hard
to see this next time
you are in a bar, since a rectangular table is not chaotic!
lar table is not chaotic!
--
--
找一个爱我的人、懂得照顾我的人,否则只有操心至死
列文充满绝望地看着吉蒂,看着她笑语安然,好像列文根本不存在似的.......
※ 来源:.紫 丁 香 bbs.hit.edu.cn.[FROM: 202.118.226.50]
Powered by KBS BBS 2.0 (http://dev.kcn.cn)
页面执行时间:1.972毫秒