Spatial database index is the vital technique for improving the storage efficiency of spatial databases and the spatial retrieval performance.
空间数据库的索引是提高空间数据库存储效率、空间检索性能的关键技术。
This issuance system possesses multi-functions of map-layer control and management, data searching and retrieval, and spatial analysis operation of basic information.
该网络发布系统具有图层控制与管理、数据查询检索、基本信息的空间分析操作功能。
A new method of describing and matching spatial context is proposed to effectively improve the distinguishability of objects in visual words-based image retrieval.
提出了一种空间上下文描述与匹配方法，有效地提高了基于视觉关键词的图像检索中目标对象的可区分性。
Effective data source selection strategy is one of the important issues of the spatial information retrieval.
合理高效的数据源选择策略是提高空间信息检索系统效率的重要因素之一。
The color spatial distribution density can provide the color spatial distribution information for CBIR(Content Based Image Retrieval).
在基于内容的图像检索中，颜色的空间分布密度能提供颜色在空间的分布信息。
Conclusion:For developing rat brain, TPM has no impairment on the ability of long-term memory and information retrieval meanwhile its negative effect on spatial learning is temporary.
结论TPM对发育期大脑的长期记忆功能及信息再摄取能力均无影响，而且对幼鼠的空间学习能力的影响也是极短暂的。
Traditionally image retrieval mainly relies on single feature such as color, texture, shape and spatial relationship, etc., so the result is usually not so good.
传统的基于内容的图像检索主要依赖颜色、纹理、形状、空间关系等单一视觉特征，检索效果往往不够理想。
Content based image retrieval techniques usually use the color histogram of the full image. But this method can't contain the spatial features.
基于内容的图象检索技术一般采用颜色直方图为特征，但是这种方法不能反映空间特性。
Experimental results show that the retrieval method using the feature indexes can achieve much higher precision than other color-spatial based methods.
实验结果表明，用这种特征索引来检索图像，可以得利比其它基于颜色-空间方法高得多的精确度。
This paper presents a trade mark retrieval method in which the shape feature and spatial relationship are both used for the purpose of making full use of image info and improving retrieval precision.
为了充分利用商标图象的内部信息，以提高商标图象的检索精度，提出了一种综合利用商标形状特征与其内部空间位置关系特征来检索二值商标图象的方法。
This system provide forest resources spatial and attribute data management, straightforward information browsing and retrieval services for forestry sector.
该系统实现了对森林资源空间与属性数据的基础管理，为林业部门提供简单直接的信息浏览与检索服务。
Users who have different authorities can manage, retrieval, query, analyse and apply the resources of library in a virtual environment. Readers can easily query spatial position through the...
系统支持具有不同使用权限的使用者在虚拟环境中实现馆藏资源的管理、检索、查询、分析和应用功能，读者可以方便地进行空间数据和属性数据的双向查询。
With the spatial data management, the system can serve for conditional retrieval and special subject retrieval about spatial data and their attributes objectives.
该系统具有空间数据管理的特性、对象的空间分布查询、条件查询和专题查询等功能。
With the spatial data management, the system can serve for conditional retrieval and special subject retrieval about spatial data and their attributes objectives.
该系统具有空间数据管理的特性、对象的空间分布查询、条件查询和专题查询等功能。
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