Unpredictability of Iteration Destination in an Integrate-and-Fire Circuit  

作　　者：戴俊 胡进锟 褚翔升 何大韧 

机构地区：[1]College of Physics Science and Technology, Yangzhou University of China, Yangzhou 225002 [2]College of Mathematics and Physics, Jiangsu University of Science and Technology of China, Zhenjiang 212003 [3]Institute of Physics, Academia Sinica, Taipei 11529

出　　处：《Chinese Physics Letters》2006年第8期2023-2026,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 10275053. C.-K. Hu and D.-R. He are also supported by the National Science Council in Taiwan under Grant No NSC 93-2112-M 001-027 and the National Center for Theoretical Sciences at Taipei： Physics Division.

摘　　要：Based on our previous study that discovered a new mechanism of the riddled-like basin appearance in piecewise continuous and noninvertible links of two conservative mappings, and the mechanism being the mixing of different attraction basins on a fat-fractal set, which was addressed as the forbidden region net [Phys. Rev. E 72 （2005） 025201（R）], we show numerically that the riddled-like attraction basins and the new mechanism appear in an integrate-and-fire circuit that can be described by piecewise continuous and noninvertible links of two dissipative mappings. This leads to the fact that vast increase of the precision of the initial condition results in practically no improvement in predictability of the iteration destination. Predictability is usually characterized by examining how error probability in the prediction, f（ε）, scales with the precision ε under the initial condition. Typically, f（ε） - ε^α with 0 ≤ α ≤ 1 being the uncertainty exponent. For riddled-like basins, a should be zero, which is in good agreement with the numerical simulation results.Based on our previous study that discovered a new mechanism of the riddled-like basin appearance in piecewise continuous and noninvertible links of two conservative mappings, and the mechanism being the mixing of different attraction basins on a fat-fractal set, which was addressed as the forbidden region net [Phys. Rev. E 72 （2005） 025201（R）], we show numerically that the riddled-like attraction basins and the new mechanism appear in an integrate-and-fire circuit that can be described by piecewise continuous and noninvertible links of two dissipative mappings. This leads to the fact that vast increase of the precision of the initial condition results in practically no improvement in predictability of the iteration destination. Predictability is usually characterized by examining how error probability in the prediction, f（ε）, scales with the precision ε under the initial condition. Typically, f（ε） - ε^α with 0 ≤ α ≤ 1 being the uncertainty exponent. For riddled-like basins, a should be zero, which is in good agreement with the numerical simulation results.

关 键 词：QUASI-DISSIPATIVE SYSTEM DYNAMICAL-SYSTEMS ATTRACTORS CRISIS WEB 

分 类 号：O41[理学—理论物理]