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STORING AND QUERYING SPATIALLY VARYING DATA QUALITY INFORMATION USING AN INTEGRATED SPATIAL RDBMS
quality spatial variation metadata sub-feature variation spatial database
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2015/9/28
Current representations of spatial data quality (SDQ) do not adequately represent the spatial variation of SDQ. For example, a user who wants to know the positional accuracy of a feature usually has t...
QUERYING SPATIAL-TEMPORAL DATA IN LOCATION-BASED SERVICES
mobile objects Location-based Services (LBS) location server MOD spatial-temporal data key technology
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2015/8/10
With the growing advances of positioning technologies like GPS, tracking the location of mobile objects to push Location-based Services (LBS) has been applicable. Generally, the location server is con...
A DYNAMIC INDEX STRUCTURE FOR SPATIAL DATABASE QUERYING BASED ON R-TREES
Spatial Database Querying R-Tree Dynamic Index Structure
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2015/8/10
In recent years, spatial database has become an important area of people's interest and research. A fundamental issue in this area is how to store and operate spatial data efficiently. This paper desc...
The Effects of Normalisation of the Satisfaction of Novice End-User Querying Databases
Normalisation Satisfaction Novice End-User Querying Databases
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2009/12/7
This paper reports the results of an experiment that investigated the effects different structural characteristics of relational databases have on information satisfaction of end-users querying databa...
散乱点云局部型面参考数据的快速查询算法（Algorithm of Local Model Reference Data Querying for Scattered Points）
逆向工程 散乱点云 动态扩展空心球
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2009/8/11
提出了一种散乱点云局部型面参考数据的快速查询算法。该算法改进R*-tree建立散乱点云的空间索引结构，获取采样点所在叶结点，依据该结点MBR构造空心球，深度优先遍历R*-tree获取空心球内数据点，通过动态扩展空心球内外半径实现散乱点云局部型面参考数据的快速获取。实验表明，该算法可适用于各种复杂型面散乱点云，提高了查询的准确性与查询效率。
INTELLIGENT INTERFACES FOR DATABASE FUZZY QUERYING
Database Intelligent Interface Fuzzy Queries
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2010/1/11
Intelligent interfaces to database querying must offer to the user a flexible way
to express the selection criteria. Some software tools are developed in our department
for scientific purpose: to be...
AUTOMATIC MODELING OF THE LINGUISTIC VALUES FOR DATABASE FUZZY QUERYING
Database Flexible Query Linguistic Values Knowledge Acquisition
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2010/1/11
In order to evaluate vague queries, each linguistic term is considered according to its fuzzy model. Usually, the linguistic terms are defined as fuzzy sets, during a classical knowledge acquisition o...
RELATIVE AGGREGATION OPERATOR IN DATABASE FUZZY QUERYING
Artificial Intelligence Database Fuzzy Logic Fuzzy Queries
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2010/1/12
Fuzzy selection criteria querying relational databases include vague terms; they usually refer linguistic values form the attribute linguistic domains, defined as fuzzy sets. Generally, when a vague q...