基于小波的雷暴放电过程的间歇性和非平稳特征的分析.pdfVIP

基于小波的雷暴放电过程的间歇性和非平稳特征分析 1)2) 1) 1) 苟学强 张义军 董万胜 1) 中国科学院 寒区旱区环境与工程研究所，甘肃 兰州 730000 2) 西北师范大学物理与电子工程学院,兰州 730070 Wavelet based multifractal characterization of ground electrical mill signal in thunderstorm discharge 1)2) 1) 1) Gou Xueqiang Zhang Yijun Dong Wansheng 1 ) Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000,China） 2) ( College of Physics and Electronic Engineering , Northwest Normal University ,Lanzhou 730070 , China) Abstract: Mainly based on the Bak’s self-organized criticality(SOC) model in complexity and the Nottale’s scale relativity theory in the fundamental physics, we consider that the complex systems far from equilibrium are evolved in avalanche and self similar cascade way, and have characterization of intermittency and multifractality. Using the ground electrical filed mill data in the middle of Qinghai-Xizang plateau region, multifractal behavior of thunderstorm discharge is investigated with recently developed wavelet transform modulus maxima(WTMM) technique in multifractal analysis, The multifractal spectrum parameters(maximum h0, asymmetry -B and width W), derived from shape of the singularity spectrum, have been used to measure the complexity of signals, and parameters are also derived to quantify the intermittency and the nonstationary, the most important characteristic of the signal，the underlying dynamics are discussed . We foun