| 引用本文: | 左怀玉,景宁,陈荦,等.一种完全分布式的空间服务及组合模型.[J].国防科技大学学报,2008,30(2):61-66.[点击复制] |
| ZUO Huaiyu,JING Ning,CHEN Luo,et al.A Full Decentralized Model for Geospatial Services and Its Composition[J].Journal of National University of Defense Technology,2008,30(2):61-66[点击复制] |
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| 一种完全分布式的空间服务及组合模型 |
| 左怀玉, 景宁, 陈荦, 唐宇 |
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(国防科技大学 电子科学与工程学院，湖南 长沙 410073)
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| 摘要: |
| 针对服务组合中控制流和数据流的不同协调机制，可将组合模型分为4种类型，分别是控制流集中式且数据流集中式、控制流集中式且数据流分布式、控制流分布式且数据流集中式、控制流分布式且数据流分布式。空间服务组合流程需处理较大规模的数据流，采用控制流分布式和数据流分布式的协调机制能有效降低组合过程中系统整体通信规模并减少空间服务组合响应时间。通过对各种不同组合类型建模的定量分析对上述观点进行了正确性论证。模拟实验证明，定量分析结果可信。 |
| 关键词: 空间服务组合 控制流 数据流 分布式 |
| DOI： |
| 投稿日期：2007-08-27 |
| 基金项目:国家自然科学基金资助项目(60472031)；国家863高技术资助项目(2006AA12Z205；2006AA701312) |
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| A Full Decentralized Model for Geospatial Services and Its Composition |
| ZUO Huaiyu, JING Ning, CHEN Luo, TANG Yu |
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(College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China)
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| Abstract: |
| Composite service models can be classified into four types according to the different management of their control-flow and data-flow, namely, centralized control-flow and centralized data-flow, centralized control-flow and decentralized data-flow, decentralized control-flow and centralized data-flow, and decentralized control-flow and decentralized data-flow. We also give our quantitative inference based on the mathematical models to the conclusion that the decentralized control-flow and decentralized data-flow model can reduce the whole message size and lead to lower response time in geospatial services composition. Our simulation confirms the conclusion. |
| Keywords: geospatial services composition control-flow data-flow decentralized |
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