以地表最大允许沉降值 作为目标控制值，设计了一个用于制定隧道工程环境影响控制策略（施工技术措施）的动态优化模型。
With the allowable maximum ground settlement as target value, a dynamic optimization model is designed to draw up the strategy(technical measures) controlling the effect of tunnelling on environment.
根据自然环境下地表的热平衡方程，建立了计算地表热红外辐射特性的理论模型。
The theoretical model to calculate the thermal IR radiative characteristics of different background, based on a system of energy equation, is established.
为了更好地表现树木在自然环境中的生长形态，在基于直径变化率的趋向性力学模型基础上，提出了一种模拟树木生长的综合力学模型。
In order to show the trees better in nature, based on diameter variety rate mechanical model, tree growth simulation 's integrated mechanical model is proposed.
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