The process of structuring the multi-lateral horizontal well productivity formula was carefully studied, and two theory defects and three mathematical approximation were detected.
本文仔细研究了分支水平井产能公式的架构过程，发现存在两处理论缺陷和三次数学近似。
The engine mathematical model in the simulation system is obtained by approximation of testing data of an actual engine with a series of small deviation and linearized models.
仿真系统中的发动机数学模型是用一系列小偏差线化模型去逼进某一实际发动机的试车数据而得到的。
The first part deals with the fundamental physical assumptions and mathematical model, while the second part describes finite-element approximation and method of calculations.
第一部分提出了基本的物理假定，讨论了数学模型；第二部分是有限元逼近和计算方法的讨论。
A quasi analytic method for solving structural optimization problems is developed by coordinated use of mathematical transformations, high quality approximation and two level approximation strategy.
协同利用数学变换、高精度近似和二级逼近策略，提出了一种求解结构优化问题的准解析法。
A mathematical model is therefore developed by approximation for such a self-exciting shock.
经过近似处理，推导出自激振荡的力学模型。
In this paper, an optimal mathematical model solving method, the successive approximation method, of the nature of nonlinear integral programming problem is suggested.
本文提出一种求解优化数学模型，属于非线性整数规划问题的方法——逐次近似法。
In spatial game models, mathematical methods of comparing the local payoff structures, mean-field approximation, pair approximation, as well as invasion probability analysis are also used.
比较邻域结构、均匀场近似、偶对近似、以及入侵概率分析的数学方法也被用来研究空间博弈模型。
An efficient solution method for structural optimization is proposed by coordinated use of mathematical transformation, two level approximation concepts and dual theory.
利用包络函数、二级近似概念和对偶理论，提出了一种结构优化的有效解法。
In this paper, the mathematical model of flatness error is established. The theory of optimal approximation is used to analyze the theoretical problem of flatness error.
应用最佳一致逼近理论，从最小条件出发建立了评定平面度误差的数学模型，对评定平面度误差的理论问题进行了分析研究。
The mathematical model is based on the calculation of geometrical figures by graphic method and the solution is obtained by successive approximation.
数学模型系以对图解法几何图形的解算为依据，并以逐步逼近计算法求解。
The mathematical model is based on the calculation of geometrical figures by graphic method and the solution is obtained by successive approximation.
数学模型系以对图解法几何图形的解算为依据，并以逐步逼近计算法求解。
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