The movement of valve of the oil well pump has not been researched perfectly in theory, and the mathematical models used to describing the movement of the oil pump valve are too simple.

目前抽油泵泵阀运动规律的理论研究还很不完善，所采用的数学模型也过于简单。

In this paper, mathematical models containing the sum of a periodic term and a trending term are established to describe the changes in water levels of thermal groundwater in the Tianjin area.

本研究通过对天津地区深层地下热水开采动态分析，建立趋势项与周期项之和的数学模型来描述水位变化。

In this paper, the governing process of gates is firstly analysed, and then the mathematical models of the operation of upstream constant level gate and that of downstream one are given.

本文首先分析了闸门的调节过程，然后给出了上游常水位闸门和下游常水位闸门工作的数学模型。

Three kinds of blast furnace mathematical models developed in our country are also introduced. At this time, it is obvious that developing the complex diagnosing and controlling system of blast…

同时，对我国已开发的三种高炉数学模型也作了简要介绍，并指出采用人工智能技术的炉况综合判断系统是当前高炉数学模型应用研究的主要趋势。

Methods We established three mathematical models of most expanders in common use. And the theoretical V/S, being calculated out of the models respectively, were compared with the clinical data.

方法建立了三类常用扩张器的数学模型，对V/S进行了理论计算，与实测结果进行了比较。

Mathematical models have shown that, basically, at a certain density there are enough variables brought by human reaction time and individual driving habits to cause a traffic jam.

数学模型已经表明，基本上，在一定的密度下，人类反应时间和个人驾驶习惯带来了很多变量，这些变量足以导致交通堵塞。

This paper presents a principle and method for building up the mathematical models of the quasi-geoid with high resolution and high accuracy by GPS leveling in Binjiang, Hangzhou.

介绍了通过布设足够密度且分布均匀的GPS水准联测点，建立杭州滨江区高精度、高分辨率的似大地水准面数学模型的原理和方法。

On the basis of above work, mathematical models of creeping principle based on move-in-mud bionic robot moving in every phase of the all moving lines are built up.

在此基础上，分段建立了基于蠕动原理仿生拱泥机器人整体运动的数学模型。

The effects of main factors on soil solute transfer with surface runoff were analyzed in order to provide some guidance for establishing related mathematical models and controlling measures.

同时分析了影响土壤溶质随地表径流迁移的主要因素的影响程度和特点，为建立描述土壤溶质随地表径流迁移过程的数学模型，以及发展控制措施提供参考。

Based on Optimization Theory, it is established that mathematical models of injection pump operation optimization and optimal flow rate of pump station to run water injection station efficiently.

依据最优化原理，建立了注水站最优流量数学模型及注水泵运行优化数学模型，使得注水站能够高效运行；