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基于地面电场的雷暴云电荷结构混合反演

DOI: 10.16188/j.isa.1003-8337.2015.06.015, PP. 73-79

Keywords: 雷暴云,电荷结构,退火粒子群,地面电场,江南地区

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Abstract:

为了解决雷暴云电荷结构的反演问题,在分析球对称电荷模型的基础上,推导了一个非线性方程组,提出了一种利用地面电场资料对雷暴云电荷结构反演的混合算法。该算法以粒子群算法为基础,针对方程组显著的非线性,构造了压缩因子φ,将模拟退火算法嵌入带压缩因子的粒子群算法中,并结合地面多站电场资料,对雷暴云的电荷结构进行了反演。反演得到该雷暴云发展成熟时,雷暴云底高度均值1650m,云底存在一定强度的正电荷,云内为强度较大的主负电荷区和主正电荷区,电荷区厚度均值为788m。结果表明,江南地区的雷暴云电荷呈现典型的三极型结构。

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