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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 {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

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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.,wuhan University,wuhan 430072.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

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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

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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, {2. University, {2. 430079, china 2.state key laboratory of software engineering, {2. University, {2. 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

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Reflective state Pattern with Dynamic Constructiveness

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wuhan University Journal of Natural Sciences 2001年第Z1期6卷 191-199页

作者： Jiang Hong 1, He Ke\|qing 1, Ying Shi 2.1.College of Computer,wuhan University,wuhan 430072.china {2.,wuhan University,wuhan 430072.china College of Computer Wuhan University Wuhan China state key {2. of software engineering Wuhan University Wuhan China

After discussing the reflective method of structure and behavior in the state design pattern based on Role Object pattern and the Reflective pattern of software architecture, this paper proposes a reflective state pattern with dynamic constructiveness. This paper explains the meta level and the base level, which are two levels of this pattern, and specifies the relation of two levels by using Meta Object Protocol (MOP). Then it discusses mechanism of interception and reification for reflecting base object from Meta object. Finally this paper gives an example of network server for applying the Reflective state pattern.

关键词： role model state design pattern reflective pattern role object pattern

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Prediction of Tumor Outcome Based on Gene Expression Data

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wuhan University Journal of Natural Sciences 2004年第2期9卷 177-182页

作者： Liu Juan 1,2. Hitoshi Iba 3 1. School of Computer, wuhan University, wuhan {2., Hubei, china 2. state key laboratory of software engineering, wuhan {2., Hubei, china 3. Department of Frontier Informatics, University of Tokyo, Tokyo 113-8656, Japan School of Computer Wuhan University Wuhan Hubei China state key {2. of software engineering Wuhan Hubei China Department of Frontier Informatics University of Tokyo Tokyo Japan

Gene expression microarray data can be used to classify tumor types. We proposed a new procedure to classify human tumor samples based on microarray gene expressions by using a hybrid supervised learning method called MOEA+WV (Multi-Objective Evolutionary Algorithm+Weighted Voting). MOEA is used to search for a relatively few subsets of informative genes from the high-dimensional gene space, and WV is used as a classification tool. This new method has been applied to predicate the subtypes of lymphoma and outcomes of medulloblastoma. The results are relatively accurate and meaningful compared to those from other methods. key words bioinformatics - tumor classification - Pareto optimization - MOEA CLC number Q 786 - TP 181 Foundation item: Supported by the National Natural Science Foundation of china (60301009), the Foundation of Young Scholars of Ministry of Education of china (150118) and Chenguang Project of wuhan City (2.112.009).Biography: Liu Juan (1970-), female, Associate Professor, Postdoctoral, research direction: bioinformatics, data mining, machine learning.

关键词： bioinformatics tumor classification Pareto optimization MOEA

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An Analysis Method of Business Application Framework

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wuhan University Journal of Natural Sciences 2001年第Z1期6卷 218-223页

作者： He Ke\|qing 1,Fan Hui hua 1,Ying Shi 2.1.Department of Computer Science, wuhan University, wuhan {2., china 2.state key laboratory of software engineering, wuhan University, wuhan {2., china Department of Computer Science Wuhan University Wuhan China state key {2. of software engineering Wuhan University Wuhan China

We discuss the evolution of object oriented software development process based on software pattern. For developing mature software framework and component, we advocate to elicit and incorporate software patterns for ensuing quality and reusability of software frameworks. On the analysis base of requirement specification for business application domain, we present analysis method and basic role model of software framework. We also elicit analysis pattern of framework architecture, and design basic role classes and their structure.

关键词： object oriented software framework analysis pattern of architecture component role model

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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 {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

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Building Distributed Web GIS: A Mobile Agent Based Approach

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wuhan University Journal of Natural Sciences 2001年第Z1期6卷 474-481页

作者： jhguan@*** Guan Ji hong 1 , Zhou Shui geng 2., Bian Fu ling 3, Meng Ling kui 3 1. School of Computer, wuhan University, wuhan {2., china 2. state key laboratory of software engineering, wuhan University, wuhan {2., Chin School of Computer Wuhan University Wuhan China state key {2. of software engineering Wuhan University Wuhan China College of Remote Sensing and Information engineering Wuhan University Wuhan China

The diversity of GISs and the wide spread availability of WWW have led to an increasing amount of research on integrating a variety of heterogeneous and autonomous GISs in a cooperative environment to construct a new generation of GIS characterizing in open architecture, distributed computation, interoperability, and extensibility. Our on going research project MADGIS (Mobile Agent based Distributed Geographic Information System) is reported, in which we propose the architecture of MADGIS to meet the requirements of integrating distributed GIS applications under Internet environment. We first describe the architecture of MADGIS, and detailed discussions focusing on the structure of client site, server site and mobile agent in MADGIS. Then we explore key techniques for MADGIS implementation.

关键词： distributed GIS mobile agent architecture mobility interoperability

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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 {2. of software engineering, wuhan University, wuhan 430072, china state key {2. 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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