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港口和轮船公司环境管理数据库开发中基于多表视图数据更新的实现
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作者 严小荃 王慧觉 郭庆平 《现代计算机》 2001年第12期82-84,共3页
文章重点介绍了使用视图的优点,并重点论述了SQLSERVER2000中的新增功能INSTEADOF触发器的设计及应用,特别是基于多表视图更新数据的新特性。
关键词 环境管理数据库 视图 数据更新 触发器
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Spatial Data Mining to Support Environmental Management and Decision Making--A Case Study in Brazil
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作者 Carlos Roberto Valencio Fernando Tochio Ichiba Guilherme Priollli Daniel Rogeria Cristiane Gratao de Souza Leandro Alves Neves Angelo Cesar Colombini 《Computer Technology and Application》 2014年第1期25-32,共8页
The growth of geo-technologies and the development of methods for spatial data collection have resulted in large spatial data repositories that require techniques for spatial information extraction, in order to transf... The growth of geo-technologies and the development of methods for spatial data collection have resulted in large spatial data repositories that require techniques for spatial information extraction, in order to transform raw data into useful previously unknown information. However, due to the high complexity of spatial data mining, the need for spatial relationship comprehension and its characteristics, efforts have been directed towards improving algorithms in order to provide an increase of performance and quality of results. Likewise, several issues have been addressed to spatial data mining, including environmental management, which is the focus of this paper. The main original contribution of this work is the demonstration of spatial data mining using a novel algorithm with a multi-relational approach that was applied to a database related to water resource from a certain region of S^o Paulo State, Brazil, and the discussion about obtained results. Some characteristics involving the location of water resources and the profile of who is administering the water exploration were discovered and discussed. 展开更多
关键词 Water resource management spatial data mining multi-relational spatial data mining spatial clustering environmentalmanagement.
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Spatial data modeling for coalfield geological environment
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作者 JIA Bei SU Qiao-mei LIU Chen LI Hui-juan 《Journal of Coal Science & Engineering(China)》 2010年第3期300-305,共6页
Presented a study on the design and implementation of spatial data modelingand application in the spatial data organization and management of a coalfield geologicalenvironment database.Based on analysis of a number of... Presented a study on the design and implementation of spatial data modelingand application in the spatial data organization and management of a coalfield geologicalenvironment database.Based on analysis of a number of existing data models and takinginto account the unique data structure and characteristic, methodology and key techniquesin the object-oriented spatial data modeling were proposed for the coalfield geological environment.The model building process was developed using object-oriented technologyand the Unified Modeling Language (UML) on the platform of ESRI geodatabase datamodels.A case study of spatial data modeling in UML was presented with successful implementationin the spatial database of the coalfield geological environment.The modelbuilding and implementation provided an effective way of representing the complexity andspecificity of coalfield geological environment spatial data and an integrated managementof spatial and property data. 展开更多
关键词 spatial data model OBJECT-ORIENTED Unified Modeling Language (UML) coal- field geological environment
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