This paper presents a theoretical model for realistic annular pressure loss calculation in which the eccentricity is a function of the well depth and a simplified method for field calculations.

本文介绍偏心度为井深函数的实际环空中压降计算的理论模型和便于现场使用的简化计算方法。

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The width and depth of laser transformation hardened layer was evaluated by establishing temperature field mathematical model and applying numerical calculation.

建立激光相变硬化过程的温度场数学模型，并应用数值计算预测了相变硬化带的形状和尺寸。

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As an important parameter usually decided by field survey, mud depth of debris flow is directly related to quantitative calculation of velocity and impact forces.

泥石流泥痕深度是一个通过勘测调查获取的重要参数，它直接关系到泥石流运动流速、冲击力等特征参数的定量计算。

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