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基于对象的多媒体合著系统代理模型

武汉大学学报（理学版） 2001年第3期47卷 299-304页

作者：何炎祥李旭晖宋强杜卓敏武汉大学计算机学院

根据多媒体合著系统的特点 ,建立了对象模型原型 OCA,并在此基础上建立多媒体合著系统代理模型 ***模型采用了一种粒度较粗的以作品内容为中心的组织方式 ,由各代理协同合作完成多媒体系统的合著工作 .

关键词：多媒体合著系统代理模型对象模型 OCA MCAS 协同代理组织方式多媒体软件

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一种具有噪声估计能力的图像恢复正则化方法

武汉大学学报（理学版） 2002年第3期48卷 311-314页

作者：曾三友丁立新康立山株洲工学院计算机系湖南株洲412008 武汉大学软件工程国家重点实验室湖北武汉430072

利用小波变换为正则化方法提供一种估计噪声能量的机制,根据估计得到的噪声能量,再利用经典正则化方法求解正则化参数,从而得到正则化解.实验结果表明带估计噪声能量机制的正则化方法,在噪声能量和原图像能量信息未知的情况下,具有较快... 详细信息

利用小波变换为正则化方法提供一种估计噪声能量的机制,根据估计得到的噪声能量,再利用经典正则化方法求解正则化参数,从而得到正则化解.实验结果表明带估计噪声能量机制的正则化方法,在噪声能量和原图像能量信息未知的情况下,具有较快的计算速度和较好的恢复能力.

关键词：噪声估计能力图像恢复正则化小波变换

A hybrid matching method for geospatial services in a composition-oriented environment

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Science china(Technological Sciences) 2010年第S1期53卷 213-220页

作者： LUO An 1,2.WANG YanDong 1,2.& CHEN ShengHua 2.1 state key {2. of software engineering,wuhan University,wuhan 430072,china 2.state key {2. of Information engineering in Surveying,Mapping and Remote Sensing,wuhan University,wuhan 430079,china state key {2. of software engineering Wuhan University Wuhan China state key {2. of Information engineering in Surveying Mapping and Remote Sensing Wuhan University Wuhan China

With the development of Internet and GIS,large volumes of spatial data,powerful computing resources and many spatial data processing functions are published in the form of Web *** suitable geospatial services in the composition-oriented environment is a crucial *** semantic Web provides a kind of technology to find and compose various service resources automatically through the *** paper proposes a hybrid method for the semantic matching of geospatial *** method includes two *** 1 puts forward a multi-level semantic matching approach,which matches single geospatial service at four levels:classification,input/output,precondition/effect and the quality of service(QoS).This multi-level matching approach makes single service matching quicker and more *** 2.puts forward a matching algorithm for a geospatial service chain based on the *** algorithm adopts a trace algorithm,taking account of the effect of the *** restricts the input/output parameters of the current service by the input/output parameters of service chain,pre-service and *** matches the atomic service dynamically in a composition-oriented environment,and accurately converts the abstract model of geospatial services into an executable geospatial service chain.A case study of the flood analysis for the Poyang Lake illustrates the effectiveness of our context-based matching method for geospatial services.

关键词： geospatial services semantic context composition service match

Genetic Algorithm for Chinese Postman Problems

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wuhan University Journal of Natural Sciences 2003年第S1期8卷 316-318页

作者： Jiang Hua, Kang Li-shanstate key {2. of software engineering, wuhan University,wuhan 430072,hubei, china state key {2. of software engineering Wuhan University Wuhan Hubei China

Chinese Postman Problem is an unsettled graphic problem. It was approached seldom by evolutionary computation. Now we use genetic algorithm to solve Chinese Postman Problem in undirected graph and get good results. It could be extended to solve Chinese postman problem in directed graph. We make these efforts for exploring in optimizing the mixed Chinese postman problem.

关键词： Chinese postman problem Eularian graph genetic algorithm evolutionary computation

An efficient method for detecting concurrency errors in object-oriented programs

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Science china(Information Sciences) 2012年第12期55卷 2774-2784页

作者： HE YanXiang 1,2.WU Wei 2.& CHEN Yong 2.1 School of Computers,wuhan University,wuhan {2.,china 2.state key laboratory of software engineering,wuhan University,wuhan {2.,china School of Computers Wuhan University Wuhan China state key {2. of software engineering Wuhan University Wuhan China

Multicore and multi-threaded processors have become the norm for modern ***,concurrent programs have become more and more prevalent despite being difficult to write and *** errors are highly likely to appear in concurrent code,conventional error detection methods such as model checking,theorem proving,and code analysis do not scale smoothly to concurrent *** is an indispensable technique for detecting concurrency errors,but it involves a great deal of manual work and is *** paper presents an automatic method for detecting concurrency errors in classes in object-oriented *** method uses a heuristic algorithm to automatically generate test cases that can effectively trigger ***,each test case is executed automatically and a fast method is adopted to identify the actual concurrency error from anomalous run *** have implemented a prototype of the method and applied it to some typical Java *** shows that our method is more effective and faster than previous work.

关键词： concurrency error dynamic test data race atomicity violations test case generation

Hierarchical Classification of Chinese Documents Based on N grams

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wuhan University Journal of Natural Sciences 2001年第Z1期6卷 416-422页

作者： Zhou Shui geng 1, Guan Ji hong 2. He Yan xiang 2.1. state key {2. of software engineering, wuhan University, wuhan 430072, china 2. School of Computer Science, wuhan University, wuhan 430072, china state key {2. of software engineering Wuhan University Wuhan China School of Computer Science Wuhan University Wuhan China

We explore the techniques of utilizing N gram information to categorize Chinese text documents hierarchically so that the classifier can shake off the burden of large dictionaries and complex segmentation processing, and subsequently be domain and time independent. A hierarchical Chinese text classifier is implemented. Experimental results show that hierarchically classifying Chinese text documents based N grams can achieve satisfactory performance and outperforms the other traditional Chinese text classifiers.

关键词： Chinese text classification N grams feature selection hierarchical classification

Extended multivariate public key cryptosystems with secure encryption function

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Science china(Information Sciences) 2011年第6期54卷 1161-1171页

作者： WANG HouZhen 1,2., ZHANG HuanGuo 1,2., WANG ZhangYi 1,2.& TANG Ming 1,2.1 The key laboratory of Aerospace Information Security and Trusted Computing, Ministry of Education, School of Computer, {2. University, {2. 430079, china 2.state key laboratory of software engineering, {2. University, wuhan 430072, china The key laboratory of Aerospace Information Security and Trusted Computing Ministry of Education School of Computer Wuhan University Wuhan China state key {2. of software engineering Wuhan University Wuhan China

Advances in quantum computers pose great threats on the currently used public key cryptographic algorithms such as RSA and ECC. As a promising candidate secure against attackers equipped with quantum computational power, multivariate public key cryptosystems (MPKCs) have attracted increasing attention in recently years. Unfortunately, the existing MPKCs can only be used as a multivariate signature scheme, and it remains unknown how to construct an efficient MPKC enabling secure encryption. Furthermore, some multivariate signature schemes have been shown insecure in recent years, and it is also not trivial to build MPKC which can serve as a secure signature scheme. By employing the basic MQ-trapdoors, this paper proposes a novel MPKC and shows how it can be used as a multivariate signature scheme and a multivariate encryption scheme, respectively. The goal is achieved by incorporating our new hash authentication techniques and some modification methods such as the Shamir's minus method. Thorough analysis shows that our schemes are secure and efficient. Our MPKC gives a positive response to the challenges in multivariate public key cryptography.

关键词： cryptography post-quantum cryptography MQ problem hash function

A Hybrid Genetic Algorithm for Reduct of Attributes in Decision System Based on Rough Set Theory

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wuhan University Journal of Natural Sciences 2002年第3期7卷 285-289页

作者： Dai Jian\|hua 1,2., Li Yuan\|xiang 1,2.,Liu Qun 3 1. state key {2. of software engineering, wuhan University, wuhan 430072, hubei,china 2. School of Computer, wuhan University, wuhan 430072, hubei,{12. 3. School of Computer Science, Lab. of software Eng. Wuhan Univ. Wuhan 430072 China Sch. of Comp. Wuhan Univ. Wuhan 430072 China Sch. of Comp. Sci. Chongqing Univ. of Post and Telecom. Chongqing 400065 China

Knowledge reduction is an important issue when dealing with huge amounts of data. And it has been proved that computing the minimal reduct of decision system is NP-complete. By introducing heuristic information into genetic algorithm, we proposed a heuristic genetic algorithm. In the genetic algorithm, we constructed a new operator to maintaining the classification ability. The experiment shows that our algorithm is efficient and effective for minimal reduct, even for the special example that the simple heuristic algorithm can’t get the right result.

关键词： rough set reduction genetic algorithm heuristic algorithm

Singularity of Some software Reliability Models and Parameter Estimation Method

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wuhan University Journal of Natural Sciences 2000年第1期5卷 35-40页

作者： XU Ren-zuo ZHOU Rui YANG Xiao-qing (state key {2. of software engineering, wuhan University, wuhan 430072, china) wuhan Univ Wuhan China

According to the principle, “The failure data is the basis of software reliability analysis”, we built a software reliability expert system (SRES) by adopting the artificial intelligence technology. By reasoning out the conclusion from the fitting results of failure data of a software project, the SRES can recommend users “the most suitable model” as a software reliability measurement model. We believe that the SRES can overcome the inconsistency in applications of software reliability models well. We report investigation results of singularity and parameter estimation methods of experimental models in SRES.

关键词： software reliability measurement models software reliability expert system singularity parameter estimation method path following method maximum likelihood ML-fitting algorithm