查询词典 spatial model

Theory; the spatial meshing theory includes comparative motion, comparative differential and conjugative curved surface; and the application of meshing theory includes gear drive and worm drive. The spatial meshing theory is the main part of the course.

课程的重点讲解内容有曲线的参数方程、切线、法面、弧长、曲率、空间曲线的基本公式、挠率及平面曲线的基本公式等；曲面第一和第二基本公式，法曲率、主方向和主曲率、欧拉公式、短程挠率、欧拉公式和贝特朗公式推广、相对法曲率和相对短程挠率等；刚体的绝对和相对运动速度、相对微分和绝对微分、相对速度和相对微分、轨迹曲面的法曲率和短程挠率等；空间共轭曲面的啮合条件、诱导法曲率、两类界限点、等距共轭曲面、空间啮合的二次接触原理等；蜗杆传动的数学模型建立及啮合特性分析方法等。

The results showed that the spatial characteristic of spectra on the opencast coal mine varied with land type area distribution, and landscape pattern. The first and second principal components of the TM images had obvious spatial characteristic, i.e., the first principal component highlighted the characters of excavation and transportation area, slope area, and cumuli and stripping area, while the second principal component highlighted the information of higher and lower vegetation-cover area.

结果表明：由于露天矿区土地扰动下土地类型、面积分布及其景观格局的不同，其遥感影像的光谱空间特征也不相同，但前2个主成分构成的空间特征结构十分明显，第1主成分主要表示采煤运煤区、边坡区以及剥离堆垫区的特征信息，第2主成分主要表示植被高覆盖区及植被低覆盖区的特征信息。

The results indicate that as the ERT has a advantage of being able to multi-directional imaging and monitor, on the basis of a analysis of resistivity images obtained at different directions, it is possible to characterize the spatial distribution patterns of the rock structure, and illustrate the anisotropic properties of the spatial distribution patterns in the rock resistivity changes during water saturation and desaturation processes.

结果表明，电阻率成像法在分析岩石裂隙介质的各向异性方面具有多方向成像和动态监测的优点，可以通过对不同方向上获得的电阻率图像的分析，提取出岩石沉积结构的空间分布模式，清晰地反映出岩石在饱水和排水过程中电阻率变化空间分布模式的各向异性特征。

We ducted the spatial data into the spatial database first.

我们首先将空间数据导入到空间数据库中。

The spatial distribution pattern and dynamics of four species of dominant plants Hippuris vulgaris,Eleocharis valleculosa,Blysmus sinocompressus and Suaeda glauca in wetlands of the Qinghai Lake were studied by means of spatial distribution analyses.

应用种群生态空间分布的分析方法，研究了青海湖四种主要湿地植物：杉叶藻、槽杆荸荠、华扁穗莞、碱蓬的空间分布格局及其动态。

The spatial distribution dispersion rules of Evodia meliaefolia population and Camellia oleifera population were also analyzed by using the geographic information system software Arcview3.2 assembled with R2V by the way of substituting temporal change with spatial difference.

本文以位于广州市内的白云山风景名胜区森林植被中的芳香植物楝叶吴茱萸群落为研究对象，在调查样地设置50个10 m × 10 m的样方，应用相邻格子法进行调查，对楝叶吴茱萸群落的组成及结构特征、主要树种的分布格局类型进行了分析；采用R2V、Arcview3.2等地理信息系统软件以&空间差异替代时间变化&的方式，对楝叶吴茱萸和油茶种群空间扩散规律进行模拟分析，从而探讨森林景观的物种流功能。

In part two, the optical spatiotemporal pattern in ring optic cavity is investigated. Using delay feedback with spatial perturbation method, the system shows roll, square, hexagon, homocentric circle,"honeycomb"and"snowflower" pattern with different spatial perturbation functions. Different patterns can be coexist and compete each other with the same perturbation function, which is the new character of this optical system with delay feedback.

第二部分，利用延时反馈的空间微扰方法研究了环形腔中二能级介质的光学时空斑图的控制，在不同的微扰函数作用下，出现了滚筒状、四方形、六角形、蜂窝状、同心圆以及&雪花&状等不同的斑图，并且在相同的微扰函数下出现了不同斑图之间的竞争，这种竞争是我们发现的这一具有空间微扰的延时反馈非线性光学系统光学斑图的新特征。

At the same time, Geo-Spatial System is a spatiotemporal system. Thus, the inbeing of Geo-Spatial can't be revealed until the concepts of time and space are integrated into one uniform framework.

同时，地理系统还是一个时空耦合系统，只有同时把时间及空间这两大范畴纳入某种统一的基础之中，才能真正揭示地理复杂系统的本质规律。

Now there are much inconsistence between industry development and spatial structure, which is not only suitable for the forming of spatial structure, but also limits industry development.

目前产业发展与空间结构之间存在着诸多矛盾，这既不利于市域整体空间结构的形成，又严重制约了产业的发展。

On data management, this paper uses Geodatabase and ArcSDE to manage graphic and attribute of spatial data, which can implement seamless integration and incorporable management. ArcSDE joins the distributed spatial and attribute data, so the users can maintain higher storage and data integrity.

在国土资源数据管理方面，ArcSDE与Geodatabase结合，实现了空间数据的图形和属性的无缝集成和一体化管理，把目前分别存储的空间数据和属性数据结合起来，从而保证了更高的存储效率和数据完整性。

Use nationalization degree and the relationship that commercialize degree, condition of calculable market economy plays scope of optimal and state-owned economy.

利用国有化程度与市场化程度的关系，可计算市场经济条件下最佳国有经济规模。

The kinds of extractant also effected desulfurization rate .

萃取剂对脱硫率的影响也很大，乙二胺的萃取效果优于甲醇的。