摘要
首先简要介绍了空间信息服务的研究现状,然后分析了空间信息服务组合的3种主要形式。总结了Agent技术实现聚合式空间信息服务组合的优势,指出Agent的自主性、交互性等特性是解决开放环境下空间信息服务的发现、选择以及组合问题的最佳途径之一。详细设计了基于Agent的空间信息服务模型,阐述了服务发现、服务组合、用户交互3部分的结构和功能,引入词频向量的方法解决服务发现和匹配问题,最后构造了一个基于Agent的空间信息服务组合的用例。
This paper first introduced the current status on geospatial information service. Then it analyzed three methods of geospatial information services composition. Alter listed the advantages of agents on services composition, it pointed out that utilize the autonomy and social ability of Agents would be one of the best ways for service discovery and composition in an open geospatial information services environment. Then the paper presented the details of the functions of services discovery, services composition and user interface components, during which it introduced TFIDF method to improve services discovering and matching efficiency. At last it gave a scenario of Agent-based service composition.
出处
《测绘科学技术学报》
北大核心
2009年第1期60-63,68,共5页
Journal of Geomatics Science and Technology
基金
国家科技支撑计划(2007BAH16B03-r3)
关键词
AGENT
空间信息服务
服务发现
服务组合
agent
geospatial information service
service discovery
service composition
