【摘要】 强调了雪崩、分形与远离平衡系统自组织演化的联系。利用2003年夏季青藏高原中部地区雷暴放电的地面电场野外观测资料,基于近年来发展的分形及多重分形分析中的去势涨落分析(detrend-ed fluctuation analysis,DFA)方法,对强闪前电场信号的关联及多重分形特征进行了分析,发现强放电前过程具有明显的分形和多重分形特征,多重分形谱与推广的二项倍增串级模式符合。分析在一定程度上表明了雷暴强放电发生的可能的自组织演化性。更多还原

【Abstract】 It is considered that avalanche and fractal characterize self-organized evolution of complex system far from equilibrium.By using the ground electrical filed data obtained in the middle of Qinghai-Xizang Plateau region,long-range correlations and multifractal behavior of strong lightning discharges in thunderstorm is investigated with recently developed detrended fluctuation analysis(DFA) and multifractal detrend fluctuation analysis(MF-DFA) method,it is found that the clear long-range persistence and multfractality are involve in the strong lightning discharges,all scaling behavior is consisted with a modified version of the binomial multiplicative cascade multifractal model,the analysis suggest the possible existence of self-organized evolution in thunderstorm discharge.更多还原