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The network environment of journal information services is composed of four parts——online catalog, E- journal abstracting and indexing databases,whole-length E -journal and services Of the networking document passing.

期刊信息服务的网络环境由联机目录、电子版文摘索引数据库、全文型电子期刊和网络化文献传递服务四个层次构成,它们将信息及信息检索系统动态地组织联合起来,形成了动态透明的信息环境。

In this thesis, we focus mainly on exploring index-based skyline algorithms. Taking full use of indexing technology, we study skyline computing in any subspace of high dimensional dataset, the problem of sampling the large-size skyline and skyline computing in categorial database.

利用索引技术,分别解决了高维数据集中任意子空间上的skyline计算问题,查询数据集上skyline点输出数目过多的问题以及分类属性数据集上如何高效、动态地算出其skyline的问题。

Domesday - Domeday automatically generates Web site navigation pages such as hierarchical site maps or sequential indices.

Domesday自动地生成Web站点导航页,如层次化的站点图或连续的索引。

And that's how easy it is to get indexed fast.

而那很容易地得到快速索引。

This could be changed by simply appending an index to duplicate types.

这可以通过简单地改变附加重复的索引类型。

By comparing with the conventional method, the sparse numbering schema has some merits as follow: the values of start and end do not recomputed, when a new node is inserted, the updating efficiency of tree structure is improvement, and the XML documents are traversed only once, when the schema is constructed, this further decrease the cost of building tree, and the schema can provide a durable conference for index.

与传统方法相比,其优点在于:由于在插入新结点时不需要重新计算其结点的start和end值,树结构更新效率得到提高;树的创建只需遍历一次文档,进一步地节省了建树开销;此外,它还能为索引提供一个相对持久和稳定的参考。

Although limestone and clinker samples have close work index values 13.53 and 13.69 kWh/t, respectively, they have demonstrated entirely different characteristics in the selection function and the breakage function model parameters.

虽然石灰石和熔结块样品有,分别地,接近的工作索引评价 13.53 和 13.69kWh/t,他们已经示范在选择功能和破坏功能的完全不同的特性做模型叁数。

Pension files and service records have been indexed on microfilm, and many soldiers received land grants for their service.

退休金档案和服务记录已编入索引的缩微胶卷,有不少士兵收到了批地,为他们服务。

Are indexes or subscripts properly initialized just prior to the loop?

索引和子脚是否被正确地初始化,在做循环之前?

However, it can only implement the limited operation to the spatial objects, cannot carry on transformation, index, interlink age and excavation to the spatial data, and hard integrate other information with combining map variable to set up and analysis new variable. Meanwhile, relational model in the traditional DBMS and the object- oriented modeling do not completely suit the spatial application domain. The relational model can handle topological relation well, but shows inabilities to that complicated level crossing the spatial region. Object-oriented model using software method based on the principle of the customer defined data type supports the abstract data type, especially spatial abstract data type, and possesses polymorphism and inheritances, and it can deal with topological and the layer relation, but hardly processes important continuous phenomenon in space.

GIS是当今操作有关空间信息的成熟工具和技术,但其只能对空间对象进行有限的操作,不能对空间数据进行变换、索引、链接和挖掘,难以集成其他信息来构建和分析新变量;而传统数据库管理模型中的关系模型和面向对象建模也不完全适合空间应用这一领域,关系模型能够较好地处理拓扑关系,但对表示横跨空间区域的复杂层次却无能为力;面向对象模型的软件方法支持抽象数据类型,特别是空间抽象数据类型,具有继承性和多态性,能够处理拓扑和层次关系,但难以处理空间中重要的连续性现象。

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推荐网络例句

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。