...Therefore, chaos appears in this vicinity. Also, when equation (1) represents a dissipative system, the state point x of the system after a long time is called an attractor, which in simple cases corresponds to a fixed point or limit cycle where f μ ( x ) = 0, but in a dissipative system that exhibits chaos, the asymptotic orbit shows a tendency to completely cover a certain region, so it is called a strange attractor. The Lorenz system is a typical example of a dissipative system with a strange attractor, which occurs when the fixed point of f μ ( x ) becomes unstable one after another in response to changes in the parameter μ. ... *Some of the terminology explanations that mention "attractor" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…したがってカオスはこの付近から出現するのである。また,方程式(1)が散逸系を表す場合,長時間後の系の状態点xはアトラクターattractorと呼ばれ,簡単な場合はfμ(x)=0とする不動点または極限サイクルがこれに相当しているが,カオスを呈する散逸系では漸近軌道が一定の領域をくまなくおおうような様相を示すためストレンジ・アトラクターstrange attractorと名づけられた。ローレンツ系はストレンジ・アトラクターをもつ散逸系の典型例であり,fμ(x)の不動点がパラメーターμの変化に対して次々と不安定化することにより発生する。… ※「アトラクター」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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