以下为句子列表：
英文: A new method of calculating the concentration distribution of radio-nuclides was proposed, in which the effect of gravity settlement, rain washing and the decay of the radioactive species re considered.
中文: 利用倾斜烟团模式，考虑实际过程中核素粒子的重力沉降、雨洗作用以及放射性衰变等因素的影响，提出一种迅速估算放射性核素扩散浓度的方法。
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英文: By measuring goaf gas concentration distribution in 3205 working face of Taopinggou coal mine, we initially identified gas concentration distribution rules in coaf of room and pillar working face, therefore provided scientific basis to prevent and cure ga
中文: 摘要通过对桃坪沟煤矿3205回采工作面采空区瓦斯浓度分布的实际测定，初步查明了房柱式回采工作面采空区瓦斯浓度的分布规律，为今后此类工作面采空区瓦斯防治、防止采空区瓦斯事故的发生提供了科学依据。
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英文: In the model the film thickness in the passage was obtained at first using two phase flow theory; then, similar analysis solution of concentration distribution of the pollutant in liquid phase and biofilm was obtained through mass component equation of po
中文: 该模型首先运用两相流理论获得了通道内液膜厚度，然后通过污染物在气相、液相的质量组分方程，结合生物膜内的传质与不攷虑氧限制的生化反应动力学方程，获得了污染物在液相和生物膜中浓度分布的近似分析解，最终得到污染物在气相中沿塔高的浓度分布及废气净化效率。
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英文: It is mainly by analyzing the features of sediment concentration distribution in vertical in this paper, and then the problems of effect of headwork gates on sediment prevention, relation between distribution of sediment deposition in irrigated areas and
中文: 本文主要从分析计算含沙量沿垂线分布特点，探讨渠首防沙的作用，分析灌区泥沙淤积分布特性与泥沙处理利用的关系，分析计算引水引沙对黄河下游河道冲淤影响及入渠泥沙的处理利用等问题。
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英文: Results indicate that species concentration distribution varies horizontally: when at a distance from the fire origin they show a 2-layer distribution, suitable for applying 2 layer zone model; and in the vicinity of the fire origin they show a gradual di
中文: 结果发现，烟气成分的分布沿着水平方向呈现不同的特点，在远离火源的位置呈上下两层分布，符合两层区域模型，而在离火源较近位置则递变分布，则须用场模型或者多层区域模型评估。
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