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直接模拟法和统计估计法研究平面波通过离散随机介质的散射

吴振森 王一平

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直接模拟法和统计估计法研究平面波通过离散随机介质的散射

吴振森, 王一平

STUDY OF SCATTERING OF PLANE WAVE THROUGH DISCRETE RANDOM MEDIUM BY DIRECT ANALOGUE AND STATISTICAL ESTIMATION

WU ZHEN-SEN, WANG YI-PING
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  • 本文从输运理论出发,利用逐项积分法获得直接模拟法和统计估计法的估计函数。研究了平面波通过平面离散随机介质的透射光强和反射光强随光学厚度、反照率、不对称因子的变化。统计估计法获得与文献[2]给出数据完全一致的结果。在直接模拟法中由于粒子空间位置抽样产生较大的统计涨落,当光学厚度增大,散射的各向异性增强及强吸收时其结果的偏差增大。
    In this paper, starting from transport theory, estimated functions of Monte carlo direct analogue and statistical estimation have been obtained by means of term wise integration. We deal with variations of transmissivity and reflectivity in optical thickness τ, albedo of a single partical a, and anisotropy g when plane wave passes through a layer discrete random media. The results of statistical estimation method are in good agreement with those given in reference [2]. As a result of considerable statistical fluctuation of scattering point samples in direct analogue method, the deviation of calculation would be larger as the optical thickness increases or anisotropic scattering or absorption becomes stronger.
    • 基金项目: 中国科学院科学基金
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  • 文章访问数:  5486
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  • 被引次数: 0
出版历程
  • 收稿日期:  1987-03-24
  • 刊出日期:  1988-02-05

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