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

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 laboratory of software engineering,wuhan university,wuhan 430072,china 2 state key laboratory of Information engineering in Surveying,Mapping and Remote Sensing,wuhan university,wuhan 430079,china 1. state key laboratory of software engineering Wuhan University Wuhan 430072 China 2. state key laboratory of Information engineering in Surveying Mapping and Remote Sensing Wuhan University Wuhan 430079 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

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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 laboratory of software engineering, wuhan university, wuhan 430072, china) wuhan university State Key Laboratory of Software Engineering Wuhan China (GRID:grid.49470.3e) (ISNI:***)

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

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Gradient Gene Algorithm: a Fast Optimization Method to MST Problem

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wuhan university Journal of Natural Sciences 2001年第Z1期6卷 535-540页

作者： Zhang Jin bo, Xu Jing wen, Li Yuan xiang state key laboratory of software engineering, wuhan university, wuhan 430072, china state key laboratory of software engineering Wuhan University Wuhan China

The extension of Minimum Spanning Tree(MST) problem is an NP hard problem which does not exit a polynomial time algorithm. In this paper, a fast optimization method on MST problem——the Gradient Gene Algorithm is introduced. Compared with other evolutionary algorithms on MST problem, it is more advanced: firstly, very simple and easy to realize; then, efficient and accurate; finally general on other combination optimization problems.

关键词： combination optimization minimum spanning tree problem extension of minimum spanning tree problem gradient gene algorithm

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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 430072,china 2 state key laboratory of software engineering,wuhan university,wuhan 430072,china 1. School of Computers Wuhan University Wuhan 430072 China2. State Key Laboratory of Software Engineering Wuhan University Wuhan 430072 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

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Cell Evolutionary Algorithm: a New Optimization Method on Ground-state Energy of the Atomic

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wuhan university Journal of Natural Sciences 2000年第4期5卷 425-430页

作者： Liu Lian-jun, Xu Jing-wen, Mao You-dong, Li Yuan-xiang Department of Physics, wuhan university, wuhan 430072,china state key laboratory of software engineering,wuhan university, wuhan 430072, china wuhan university Department of Physics Wuhan China (GRID:grid.49470.3e) (ISNI:***) wuhan university State Key Laboratory of Software Engineering Wuhan China (GRID:grid.49470.3e) (ISNI:***)

The purpose of this paper is to present a new general approach to solve ground-state energies of the double-electron systems in a uniform magnetic field, in which the basic element of evolution is the set in the solution space, rather than the point. The paper defines the Cell Evolutionary Algorithm, which implements such a view of the evolution mechanism. First, the optimal set in which the optimal solution may be obtained. Then this approach applies the embedded search method to get the optimal solution. We tested this approach on the atomic structure, and the results show that it can improve not only the efficiency but also the accuracy of the calculations as it relates to this specific problem.

关键词： key words double electron systems ground state energy variational principle cell evolutionary algorithm evolutionary algorithm

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New Refinement Relations of Z Specifications for Multiple Viewpoints Oriented Requirements Method

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wuhan university Journal of Natural Sciences 2001年第Z1期6卷 304-312页

作者： He Yan xiang, Song Qiang, Huang Qian School of Computer, state key laboratory of software engineering wuhan university, wuhan 430072, china School of Computer State Key Laboratory of Software Engineering Wuhan University Wuhan 430072 China

In this paper we develop several new refinement relations of Z for multiple viewpoints oriented requirements method (MVORM). The original motivation is that we found the standard Z refinement relation is not adequate or correct when considering specifications that have temporal relationships of operations. The concept of temporal state variables is introduced into Z. Then new implementation relations are defined and new refinement relations are deduced, mainly for temporal state variables to process temporal relationships of operations. We use state transition systems to abstract the temporal state transitions. A simple example is used to show the procedures of MVORM. Finally some directions of further work are forwarded.

关键词： temporal state variable formal description language state transition system implementation relation refinement relation multiple viewpoints oriented requirements method

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An Inversion Evolutionary Algorithm on How to Convert FDP to TSP

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wuhan university Journal of Natural Sciences 2001年第Z1期6卷 589-592页

作者： Xu Jing wen, Zhang Jin bo, Li Yuan xiang state key laboratory of software engineering,wuhan university, wuhan 430072, china state key laboratory of software engineering Wuhan University Wuhan China

The Film Copy Deliverer Problem (FDP),much more difficult than TSP,is a new problem in the combination optimization. In this paper,a new algorithm is introduced. First,the FDP is converted to TSP. Then an evolutionary algorithm based on inversion operator is adopted. Compared with other Genetic Algorithms,it is not only more simple and easier to realize but also faster and more accurate.

关键词： film copy deliverer problem (FDP) traveling salesman problem (TSP) evolutionary algorithm inversion operation

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Two Generic Frameworks of Multiple Viewpoints Oriented Requirements Method and Their Comparison

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wuhan university Journal of Natural Sciences 2001年第Z1期6卷 313-319页

作者： Song Qiang, He Yan xiang, Huang Qian School of Computer Science, state key laboratory of software engineering, wuhan university, wuhan 430072, china School of Computer Science State Key Laboratory of Software Engineering Wuhan University Wuhan 430072 China

Traditional requirements method has some problems when it is used for large distributed systems. Multiple viewpoints oriented requirements method (MVORM) is a new method for resolving these problems. This paper develops two generic formal frameworks of MVORM, framework based on refinement relation (FBRR) and framework based on implementation relation (FBIR). They are generic, because no assumptions are made about the development process or the formal description languages to be used. Three kinds of specification relations and three kinds of specification transformations are discussed over FBIR and FBRR. This paper also compares the equivalence between FBIR and FBRR. We point out that an equivalent FBIR can be found for any FBRR, but reverse transformation is not always possible. We think FBIR is better than FBRR on most cases.

关键词： multiple viewpoints oriented requirements method framework based on refinement relation framework based on implementation relation refinement relation implementation relation

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A Study of Method on Connectivity Analysis of Between software Components

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wuhan university Journal of Natural Sciences 2001年第Z1期6卷 288-291页

作者： Hu Feng, Lin Zi yu , Pen De chun state key laboratory of software engineering, wuhan university, wuhan 430072, china state key laboratory of software engineering Wuhan University Wuhan 430072 China

An analysis and computation method of connectivity between components that based on logical subtyping is first presented, the concepts of virtual interface and real interface, and quantitative analysis and computation formula of connectivity between interfaces are also introduced, that based on a extendable software architecture specification language model. We provide a new idea for solving the problem of connection between reuse components.

关键词： connectivity analysis component interface logical subtyping

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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, wuhan university, wuhan 430079, china 2 state key laboratory of software engineering, wuhan university, wuhan 430072, china 1. The key laboratory of Aerospace Information Security and Trusted Computing Ministry of Education School of Computer Wuhan University Wuhan 430079 China2. State Key Laboratory of Software Engineering Wuhan University Wuhan 430072 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

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