查询词典 spatial model

At first, the article explores the factors causing the migration and conglomeration of population mobility and migration, by constructing the microeconomic model of population floating. Then, based on the analysis of the spatial distribution of population and industry, the article draws a conclusion that the population conglomeration of pro-developed region should adapt to the process of industry conglomeration, and the other developing region should adjust to the both the process of inverse flow of population refluence and the industry transformation.

通过构造人口流动迁移的微观经济模型，掌握人口流动、迁移和集聚的动因；通过人口与产业的空间布局分析，说明泛珠三角区域先发展地区的人口集聚与产业集聚过程应该相互适应，而后发展地区的人口"回流"与产业转移过程更应互为补充。

This study was conducted in Taiyuan sewage irrigation area from 1997 to 2000.The research process included field investigation, sampling, lab test, model experiment and data analysis by geo-statistics method. The source, affecting factors, content condition, transference regularity, spatial distribution of heavy metal in sewage irrigation area were studied. The results showed that mercury, cadmium and lead contents of soil were higher than soil background value.

本文以在中国北方具有代表性的太原污水灌溉区为研究对象，污灌区位于山西省中部的太原盆地北端，总面积2.7万公顷，在研究区共布土样点49个，粮食作物样33个，水样点26个，大气样点6个，通过实地调查取样监测和室内模拟试验，采用地统计学和多元统计等方法，系统研究了污灌区土壤-作物系统中重金属Hg、Cd、Pb的来源、含量状况、累积影响因素、空间分布特征、迁移转化规律、重金属环境容量的区域分异与应用等内容。

The systems of machining complex curved surface by means of WEDM are classified to establish the main kinematics theories of machining complex curved surface by means of WEDM By analyzing various systems of machining complex curved surface by means of WEDM, the combination, characteristics, motion parameters and motion types of them are summarized And a model system of the is established according to the basic principles of the forming of ruled surface in spatial analytic geometry.

主要内容及取得的成果体现在以下几个方面：为了建立复杂曲面电火花线切割运动学的主要理论，本文对复杂曲面电火花线切割加工系统进行了分类，并分析总结出各种复杂曲面电火花线切割加工系统的组成、特点、运动参数及运动形式。

A nonlinear saddle point programming model for evaluation of spatial straightness errors is established.

建立起了空间直线度误差评定的非线性鞍点规划模型，给出了"最小条件"判据，提出了直接求解鞍点规划模型的遗传算法。

distortions in a nematic liquid crystal composed of n molecular layers is investigated using a simple cubic lattice model, based upon the dispersion force pair potential with spatial anisotropy.

基于空间各向异性色散力势能，用简单的立方格子模型研究具有n层液晶分子所组成的向列相液晶形变。

According to this new model of urban spatial structure and simplistic clarity.

根据这一新模式城市空间结构和简单明确。

The major implementations of the developed model include: Pseudo-spectral and finite-difference schemes are employed to approximate the spatial-differential operators in the horizontal and vertical directions, respectively. A second-order Runge-Kutta method is adopted to integrate in time for the velocity field and the free-surface elevation. The solenoidal condition of the velocity field is satisfied by solving the transformed pressure Poisson equation. A modified secant method is used to accelerate the iterative solution of the non-separable Poisson equation.

模式的主要数值方法包括：分别以拟频谱法以及二阶有限差分法近似控制方程与边界条件中的水平与垂直导数；以二阶Runge-Kutta法进行非稳态的自由液面位移与流场速度的时间积分；利用改良式割线叠代法求解计算区间中不可分离的压力Poisson方程式，以满足不可压缩流条件。

Industrial surveying system; model test; deformation measurement;spatial resection

工业测量系统；模型试验；变形测量；空间交会

The proposed method is based on model and is not related to the spatial point distribution, point number and the image gray level.

该方法基于模型，与空间点分布模式、点的数量及图像灰度无关，实验结果表明该方法切实可行，也可用于特征点的识别。

Spatial entity is induced to point object, line object, surface object and body object in the model.

研究了多层介质三维地质模型中工程开挖的可视化表达方法。

Chinese traditional virtue is humility and wariness,the compliment and praise to the others should be declination

中国人的传统美德是谦虚谨慎，对别人的恭维和夸奖应是推辞。如

We bought this house on the never-never.

我们以分期付款的方式买下这座房子。