采用随机影响负二项回归模型，评估深管井的使用对儿童发生腹泻的影响。
The effect of deep tube well use on the incidence of childhood diarrhoea was assessed using a random effects negative binomial regression model.
本文根据量子力学和热力学理论，提出了一种以大量的处在无限深势阱中的微观粒子为工质的量子卡诺制冷循环模型。
Based on quantum mechanics and thermodynamics, a model of Carnot refrigeration cycle is proposed in which the working substance is composed of micro-particles contained in a potential well.
应用所建立的热源模型模拟分析了激光深熔焊焊缝边界形状，并与实验结果进行了比较。
The border of laser beam penetration welding seam is simulated by the constructed heat source model and compared with the experimental results.
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