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Then the spatial index is constructed which includes not only the external approximate expression but also interior approximate expression of spatial object and is extended from tranditional index only with external approximate expression. The index structures of MR-tree and MRD-tree based on multi-approximate expression are set up with the prototype index of R-tree, and the relevant algorithms about the index of insertion, deletion and search are provided. Then, the efficiencies of constructing index based on the multi-approximate expression and window range query are analysised and compared. In addition, the several algorithms and efficiency of soving the maximum enclosed circle and maximum enclosed rectangle are discussed and analyzed during constructing index based on multi-approximate expression.

首先,论文讨论了空间数据的特点、空间数据库的关键技术以及空间对象间的拓扑、距离以及方向关系,分析了空间对象的外部和内部近似表达,然后将传统索引中只利用空间对象的外部近似扩展为既有空间对象的外部近似又有空间对象的内部近似,即以空间对象的多重近似来构建索引,并以R-tree为索引原型构建基于多重近似的MR-tree和MRD-tree索引结构,然后给出了相关索引的插入、删除及查找算法,并通过实验比较分析了基于多重近似索引与基于外部近似索引的构建效率及窗口范围查询效率。

With respect to the 3D modeling, the Delaunay Triangulation constructing method of 2D scattered data set is discussed firstly. The triangulation method of 3D surface data set of 3DLCS is analyzed by basing on the DT constructing problem of 2D scattered data set.

在三维构型方面,本文首先论述了二维散乱数据点集的Delaunay三角形化构造方法,然后以此为基础分析了3DLCS中的三维表面数据集的三角形化方法。

This paper has summarized four kinds of methods of constructing new sequences with required complexity: constructing method, trace function method, Bent function method and chaos method.

通过分析,我们总结了构造复杂度特性好的序列的方法大致有四种,构造法、迹函数方法、Bent函数方法、混沌方法等。

Moreover, the planning and building of a city is a process of constructing tourist attractions for the city, the integration of tourist attractions should take full advantage of Urbana's constructing fruit.

一个城市在发展旅游中应该把旅游资源的视角放开,把城市所有的组成要素都视为旅游资源,城市的规划建设就是为城市旅游构造资源,旅游资源整合要充分利用城市规划建设的成果。

In the development of city's tourism, a city should broaden its sight by regarding all factors of the city as tourist attractions. Moreover, the planning and building of a city is a process of constructing tourist attractions for the city, the integration of tourist attractions should take full advantage of Urbana's constructing fruit.

一个城市在发展旅游中应该把旅游资源的视角放开,把城市所有的组成要素都视为旅游资源,城市的规划建设就是为城市旅游构造资源,旅游资源整合要充分利用城市规划建设的成果。

In order to loose therequirement of continuity as possible,study the construction mechanism andproperty of C1 continuity element,enlarge the constructing area of finiteelement,explore simpler,higher efficient element,based on the weak form ofthe domain equilibrium in this paper,obtains integral continuity condition,weak continuity condition gradually,enlarge the constructing area of finiteelement indeed,concludes that their average strains are identical.

为尽可能放松连续性要求、探讨C1连续有限元的构造机理和特性、扩大有限元的构造范围、寻求简单元高效的单元,本文从区域平衡的弱形式开始,逐步得出积分连续条件、弱连续条件,扩大了有限元的构造范围,得出其平均应变相等的结论。

In order to loose therequirement of continuity as possible, study the construCtion mechanism andpropedy of Cl cofltinuity element, enlnye the construCting area of finiteelement, explore simpler, higher efficient element, based on the weak form ofthe domain equilibrium in this paper, obtains integral continuity condition,weak continuity condition gradually enlarge the construCting area of finiteelement indeed, concludes that their average stralns are identical.

为尽可能放松连续性要求、探讨C_1连续有限元的构造机理和特性、扩大有限元的构造范围、寻求简单元高效的单元,本文从区域平衡的弱形式开始,逐步得出积分连续条件、弱连续条件,扩大了有限元的构造范围,得出其平均应变相等的结论。

In ...更多 his ideograhpic symbol system, the first level is the process from "Signans" to " Designatum" which was put forward by Ferdiand de sausure, that is, the process of constructing the form of Chinese characters; the second level is the process of taking "Signans" and "Designatum" for the overall integration as the new"Signans" and then producing the new " Designatum", that is, the process of constructing the meaning of Chinese characters.

在罗兰·巴特的符号表意系统,第一层是索绪尔的&能指&到&所指&的过程,即汉字的构形思维的过程;第二层是能指与所指结合的整体作为新的能指从而产生的新的所指的过程,即汉字构意思维过程。创造汉字的思维活动规律对华文广告创意思维活动有着重要的影响和借鉴意义。

In his ideograhpic symbol system, the first level is the process from "Signans" to " Designatum" which was put forward by Ferdiand de sausure, that is, the process of constructing the form of Chinese characters; the second level is the process of taking "Signans" and "Designatum" for the overall integration as the new"Signans" and then producing the new " Designatum", that is, the process of constructing the meaning of Chinese characters.

在罗兰·巴特的符号表意系统,第一层是索绪尔的&能指&到&所指&的过程,即汉字的构形思维的过程;第二层是能指与所指结合的整体作为新的能指从而产生的新的所指的过程,即汉字构意思维过程。

Because constructing the fuzzy function is aim at every target of financial risk dividedly, the fuzzy function constructed has target and is a quantitative member belongs to [0,1]. Thus the constructing of function has more objective, and better reflect the unified target .

因为构造出的模糊函数是分别针对金融风险的每一个目标的,这样构造出的模糊函数带有目标性,且是[0,1]区间的一个量化数,这样函数的构造就比较有针对性,且更好地反映了目标化的统一。

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推荐网络例句

He is the most remarkable man that I have ever known.

他是我知道的人中最值得注意的人。

Increased appearance of lymphocele was noticed in patients with diabetic nephropathy, congenital malformations of the urinary tract, and inflammatory diseases, including glomerulopathy and extraglomerular ones, after high-voltage radiotherapy and after removal of the renal graft.

经过高压放射疗法和切除移植肾后,在糖尿病肾病患者、泌尿系统先天性畸形患者和炎症患者身上发现淋巴囊肿有所增加,包括肾小球病和球外疾病等。

Pagans and partygoers greeted the summer solstice at the ancient stone circle of Stonehenge.

异教徒和社交聚会常客在史前巨石柱的古老的石圈附近庆祝夏至。