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国家自然科学基金(90612014)

作品数:4 被引量:5H指数:1
相关作者:齐勇乔亚男侯迪徐东红杜小智更多>>
相关机构:西安交通大学更多>>
发文基金:国家自然科学基金国家教育部博士点基金国家高技术研究发展计划更多>>
相关领域:自动化与计算机技术更多>>

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高阶信息检素问题相关研究进展被引量:1
2009年
提出高阶信息检索问题这一概念,将多种信息检索的深层次问题统一在1个框架内,给出了词汇共现、语义查询扩展和统计语言模型3个高阶信息检索问题统一解决模型的技术基础,对高阶信息检索问题相关的研究进展进行了阐述,展望了高阶信息检索的发展趋势。
乔亚男齐勇侯迪
关键词:计算机应用
文本信息检索实验方法研究被引量:1
2009年
阐述了信息检索研究领域的现状和进行信息检索研究所需的重要实验方法。在介绍了信息检索系统的架构和常见的信息检索研究方向的基础上,对信息检索研究实验的3要素:数据集、实验平台和创新算法进行了详细说明,并对实验平台Lemur和Lucene的异同点做了重点分析。
乔亚男齐勇侯迪
关键词:计算机应用信息检索
MAS-based dynamic web service composition formal model被引量:3
2008年
Applying dynamic web services composition is one of the important schemas for solving service-oriented architecture (SOA)and service-oriented computing(SOC).For implementing dynamic web services composition,the multi agent system (MAS)is applied to web services composition.First, the essentials of the MAS and web services composition are analyzed and their relationship is discussed.Secondly, an MAS-based architecture is designed for dynamic web services composition,and it is named as CSMWC.A Jade tool is used to implement the major components.The architecture can primarily implement syntactic level dynamic web services composition,and it gives a basis for semantic level dynamic web services composition.For specifying the correctness of the architecture,by using pi-calculus,the architecture of the MAS is formally described,and its dynamic properties and adaptability are reasoned.Finally,it demonstrates the idea proposed by the Pi4SOA tool.
徐东红齐勇候迪沈林峰杜小智王功震
关键词:PI-CALCULUS
Exploration of Energy Conservation MAC Protocol of WSNs for Ubiquitous Environment
2008年
According to analyze the facade phenomenon of wire-less sensor networks(WSNs),this paper proposes a feasible method to state clearly and improve the power control efficiency of wire-less sensor networks(WSNs). One of the crucial problems for WSNs is the design of medium access control (MAC) protocol. Our method want to adjust the activities of the MAC protocols control to achieve the enery conservation when the wireless communication module of sensor nodes is running, which is the major consumer of energy consumed by sensors energy. The energy efficiency of MAC protocol makes a strong impact on the network performance. To some extent,our research work describes and analyze the sources of energy consumption in MAC layer and simultaneously present an optimal method for the design of MAC protocol. Then we discusses some factors impacting on the performance of MAC protocol and metrics of performance evaluation. Eventually, the coming research direction is summarized.
WEI Wei QI Yong HOU Di
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