一种基于本体的概念相似度计算及其应用

概念的语义相似度研究,是知识表示以及信息检索领域中的一个重要内容。本文提出了基于语义相似度和相关度的综合概念相似度计算方法,考虑了语义距离和本体库特征,加入概念的信息重合度、概念的深度、概念的密度和不对称因子的辅助影响。通过实验和两种传统的语义相似度计算方法进行对比,本方法能更好地区分本体树中不同关系的概念对,验证了该方法的有效性。     

基于概念相似度计算的语义Web服务发现方法

提出一种基于领域本题概念相似度计算的语义Web服务发现方法。给出合理的概念相似度计算公式,通过领域本体概念相似度计算,最终获得请求和候选服务之间的相似度。传统的概念相似度计算方法只考虑继承关系,本文采用的单概念语义不但考虑继承关系,还考虑二元关系,使本体关系结构构成图结构,更加合理。计算语义距离时,适当处理多继承问题和环问题。实验证实,本算法使得匹配更加合理精确。     

基于本体的语义相似度和相关度计算研究综述

语义相似度和相关度计算广泛应用于自然语言处理中,已有大量语义相似度和相关度算法被提出。分析总结了树和图结构中影响概念相似度或相关度的因素,综述了基于本体的英文语义相似度和相关度计算方法,明确了语义相似度和相关度的区别与联系,系统地对算法进行了分类,最后对每类算法进行了详细的比较。     

改进的概念语义相似度计算

在相似度计算中,本体能够将各种概念及相互关系明确地,形式化地表达,因而发挥着重要的作用.为了使相似度计算结果更为精确,考虑更全面的利用本体中的关系,和相似度计算在特定领域中应用的特点,提出一个改进的相似度计算模型.利用上下位关系计算相似度,非上下位关系计算相关度,将二者合成,并同时考虑语义检索领域中,相似度计算的不对称性.经过实验验证了该方法有效且精确.     

面向教学资源查询的语义相似度和相关度算法

在基于距离的语义相似度计算方法的基础上,综合多种因素对相似度的影响,提出一种新的相似度和相关度计算方法。将其应用到教学资源领域本体,计算本体概念间的相似度和相关度。实验结果显示该算法可以提高传统基于距离的相似度算法的性能。最后比较了利用该算法的语义查询与传统关键字查询的结果。     

基于本体的智能检索及其在泌尿外科中的应用

以本体论作为指导理论,通过研究泌尿外科辅助诊断系统模型,在泌尿外科领域本体的基础上研究语义相似度、语义相关度的计算方法,并提出新的相关度计算方法。该方法可以定量地分析领域本体中的概念间相关度。并通过建立泌尿外科本体,实现基于泌尿外科本体的语义推理。     

中文语义相关度计算模型研究

现有的中文语义相关度计算模型对相关度的定义并不明确和统一,且计算方法多以相似度计算为基础,导致应用语义相关度存在局限。提出了一个新的语义相关的定义,认为两个词所表达的概念之间,如果存在用类似“知网”的知识描述体系所描述的语义关系,那么这两个概念之间就是语义相关的。通过挖掘这些直接或间接的关系,提出了一种新的语义相关度的计算模型,适用于所有类似知网的知识体系中语义相关度的计算。最后将该计算模型应用于词义排歧,验证了该计算模型的有效性。     

一种基于本体的句子相似度计算方法

提出了一种基于树结构本体的句子相似度计算方法。利用本体概念与句子中关键词之间建立的语义索引,构建句子与本体间的直接和间接语义联系,据此提取描述句子的语义向量,从而计算句子间的语义相似度。应用微软研究院的意译语料库(MSRP)对本方法进行了验证,结果表明:与相关的计算方法相比,本方法在不完备附加信息应用前提下获得了较好的准确率和召回率。     

本体映射中相似度计算的改进

本体映射是一种常用的解决本体异构的方法,在本体映射过程中,概念相似度计算是重要的环节。针对目前概念相似度计算方法存在的不足,采用一种综合的方法进一步改善计算的过程,从本体概念的语义相似度、属性、实例、结构等方面计算概念的相似度。通过引入概念相关度以及属性论方法,寻找更加有效的概念相似度计算方法。最后的实验证明,此方法能适应不同规模的本体,并能提高概念对相似度的准确性。     

一种综合的本体相似度计算方法

本体相似度计算是本体映射的关键环节.本体的实例、关系、属性、结构等信息是相似度计算需要考虑的重要因素.针对目前本体映射过程中相似度计算所存在的问题,提出了一种综合的相似度计算方法.首先判断不同本体之间是否存在相关性.若相关,则充分考虑各种相关因素,从语义和概念两个层面来进行比较,然后给出了本体的综合相似度计算方法.最后采用了两组测试数据对该方法进行实验,并与GLUE系统的概率统计方法进行了实验对比.实验结果表明,该方法能够有效确保相似度计算的准确性.     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

Call for Papers The 6^th International Conference on Grid and Cooperative Computing

Recent years have seen rapid advances in various grid-related technologies, middleware, and applications. The GCC conference has become one of the largest scientific events worldwide in grid and cooperative computing. The 6th international conference on grid and cooperative computing (GCC2007) Sponsored by China Computer Federation (CCF),Institute of Computing Technology, Chinese Academy of Sciences (ICT) and Xinjiang University ,and in Cooperation with IEEE Computer Soceity ,is to be held from August 16 to 18, 2007 in Urumchi, Xinjiang, China.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

A pragmatic multi-method investigation of discrepant technological events: Coping,attributions, and ‘accidental’ learning

Discrepant technological events or situations that entail a problem, a misunderstanding or a difficulty with the Information Technology (IT) being employed, are common in the workplace, and can lead to frustration and avoidance behaviors. Little is known, however, about how individuals cope with these events. This paper examines these events by using a multi-method pragmatic approach informed by coping theory. The results of two studies – a critical incident study and an experiment – serve to build and test, respectively, a theoretical model that posits that individuals use a variety of strategies when dealing with these events: they experience negative emotions, make external attributions, and adopt engagement coping strategies directed at solving the event, eventually switching to a disengagement coping strategy when they feel they have no control over the situation. Furthermore, users’ efforts may result in ‘accidental’ learning as they try to overcome the discrepant IT events through engagement coping. The paper ends with a discussion of the results in light of existing literature, future opportunities for research, and implications for practice.     

The Distributed Time-Triggered Simulation Scheme: Core Principles and Supporting Execution Engine

Distributed real-time simulation is a young technology field but its practice is under increasing demands. In recent years the author and his collaborators have been establishing a new approach called the distributed time-triggered simulation (DTS) scheme which is conceptually simple and easy to use but widely applicable. The concept was initiated in the course of developing a new-generation object-oriented real-time programming scheme called the time-triggered message-triggered object (TMO) programming scheme. Some fundamental issues inherent in distributed real-time simulation that were learned during recent experimental studies are discussed along with some approaches for resolving the issues. An execution engine developed to support both the TMOs engaged in control computation and the TMOs engaged in DTS is also discussed along with its possible extensions that will enable significantly larger-scale DTSs.     

Software-Konfigurationsmanagement in großen Softwareprojekten

Zusammenfassung Mit zunehmender Größe der Softwaresysteme verschärfen sich die für die Software-Herstellung typischen Probleme: Beherrschen großer Objektmengen, Erhalten der Systemkonsistenz, Kontrolle der ständigen Änderungseinflüsse und Gewährleisten einer langen Lebensdauer. Die Disziplin Konfigurationsmanagement bildet den methodischen Ansatz, diese Probleme besser zu beherrschen. Software-Konfigurationsmanagement faßt die Herstellung von Softwaresystemen als eine Abfolge von kontrollierten Änderungen an gesicherten Zwischen- und Endergebnissen auf. Dargestellt werden die Objekte und Funktionen des Software-Konfigurationsmanagements sowie die hierfür in großen Software-Projekten benötigten Methoden, Instanzen und Hilfsmittel.     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and     

Editorial:Brain-machine interface(BMI) and cyborg intelligence

正Brain-machine interfaces(BMIs)aim at building a direct communication pathway between the brain and an external device,and represent an area of research where significant progress has been made during the past decade.Based on BMIs,mind information can be read out by neural signals to control     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate     

SCIENCE CHINA Information Sciences SUBJECT INDEX TO VOLUME 57(2014)

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