Based on the theoretical analysis on brake process of automobiles, the calculation model of practical safe following distance is set up.
在对汽车制动过程理论分析的基础上，建立了实用安全跟车距离计算模型。
On the basis of the model theoretical analysis and mathematical calculation are carried out.
在此模型的基础上进行了理论分析和数学计算。
A calculation model is established in the paper for determining the water use ensurance probability based on the statistic analysis of irrigation area inflow and water needed.
在对灌区来水和需水随机性分析的基础上，建立了一种确定灌区灌溉用水保证率的计算模型。
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