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An improved Bayesian network structure learning algorithm and its application in an intelligent B2C portal

Web Intelligence and Agent Systems 2007年第2期5卷 127-138页

作者： Ji, Junzhong Liu, Chunnian Yan, Jing Zhong, Ning College of Computer Science and Technology Beijing University of Technology Beijing Municipal Key Laboratory of Multimedia and Intelligent Software Technology Beijing 100022 China Department of Information Engineering Maebashi Institute of Technology 460-1 Kamisadori-Cho Maebashi-City 371-0816 Japan

Web Intelligence (WI) is a new and active research field in current AI and IT. Intelligent B2C Portals are an important research topic in WI. In this paper, we first investigate and analyze the architecture of a B2C portal for personalized recommendation from the viewpoint of conceptual levels of WI. Aiming at knowledge-level data mining in a B2C portal, we present a new improved learning algorithm of Bayesian Networks, which consists of two major contributions, namely, reducing Conditional Independence (CI) test costs by few lower order CI tests and accelerating search process by means of sort order for candidate parent nodes. Experimental results on benchmark ALARM data sets show that the improved algorithm has high accuracy, and is more efficient in the time performance than other algorithms. Finally, we apply this algorithm to learning Customer Shopping Model (CSM) in an intelligent recommendation system. By a number of experiments on real world data, we find that the recommendation method based on the learned CSM outperforms some traditional ones in rates of coverage and precision. © 2007 - IOS Press and the authors. All rights reserved.

关键词： Bayesian networks

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Towards bridging the gap between goal-oriented requirements engineering and compositional architecture development

Towards bridging the gap between goal-oriented requirements ...

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ICSE 2007 Workshops:Second Workshop on SHAring and Reusing architectural Knowledge Architecture, Rationale, and Design Intent, SHARK-ADI'07

作者： Herold, Sebastian Metzger, Andreas Rausch, Andreas Stallbaum, Heiko Clausthal University of Technology Institute for Computer Science Software Systems Engineering Julius-Albert-Straße 4 38678 Clausthal-Zellerfeld Germany University of Duisburg-Essen Campus Essen Institute for Computer Science and Business Information Systems Schützenbahn 70 45117 Essen Germany

ISBN: (纸本)0769529518

Requirements engineering and architectural design are key activities for the successful development of software-intensive systems. Although both activities are strongly intertwined and interrelated, many steps to date are driven solely by the intuition and the architectural knowledge of individuals. Thus, systematic approaches are needed which could minimize the risks of wrong early requirements and architectural decisions and foster the explicit reuse of architectural knowledge especially for supporting early design decisions are. In this paper, we present our vision of supporting the early requirements and architectural decisions by making explicit the interactions between the early steps and artifacts in requirements engineering and architectural design and thereby reusing architectural knowledge. To this end, we propose to couple goal-oriented requirements engineering and compositional architecture development by means of a repository of reusable, generic architectural drivers. © 2007 IEEE.

关键词： Requirements engineering

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Perfect concurrent signature protocol

Perfect concurrent signature protocol

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SNPD 2007: 8th ACIS International Conference on software engineering, Artificial Intelligence, Networking, and Parallel/Distributed Computing

作者： Zhenjie, Huang Rufen, Huang Xuanzhi, Lin Department of Computer Science and Engineering Zhangzhou Normal University Fujian 363000 China State Key Laboratory of Information Security Institute of Software Chinese Academy of Sciences Beijing 100080 China

ISBN: (纸本)0769529097

The concept of concurrent signatures was introduced by Chen, Kudla and Paterson in their seminal paper in Eurocrypt 2004 which allows two entities to produce two signatures in such a way that, the signer of each signature is ambiguous from any third party's point of view until the release of a secret, known as the keystone. Once the keystone is released, both signatures become binding to their respective signers concurrently. Later, a stronger notion called perfect concurrent signatures with two concrete schemes was proposed by Susilo, Mu and Zhang. In perfect concurrent signatures, although both signers are known to be trustworthy, the two signatures are still ambiguous to any third party. Unfortunately, Susilo et al.'s schemes are unfair. In this paper, we first show that in their schemes the initial signer can cheat the matching signer by carefully choosing some communication value and then propose fair perfect concurrent signature protocol to fix our attacks. © 2007 IEEE.

关键词： Network protocols

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The acceptance of a clinical IT innovation by the care givers in residential aged care 11-weeks after the software implementation in Australia

The acceptance of a clinical IT innovation by the care giver...

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2007 International Conference on Wireless Communications, Networking and Mobile Computing, WiCOM 2007

作者： Ping, Yu Hui, Yu Yi, Mu School of Information Systems and Technology University of Wollongong NSW 2522 Australia School of Biomedical Science Chongqing Institute of Technology Chongqing 400050 China School of Computer Science and Software Engineering University of Wollongong NSW 2522 Australia

ISBN: (纸本)1424413125

End user acceptance and satisfaction with a new IT innovation is the pre-requisite for the successful introduction of this IT solutino into an organization. More than 70 per cent of health IT projects have failed to a certain extent because of its failure to satisfy the functional or non-functional requirements of the end users and thus were not accepted by them. To date, there is no sound evidence to suggest that clinical IT solutions will bring in benefits for a residential aged care facility. This is a real concern for aged care management in investment in clinical IT solutions in Australia. Therefore, successful cases about the acceptance and benefits of the introduced clinical IT solutions by care givers in aged care services are essential for supporting the IT investment decisions of the aged care management and government policy makers. This is an essential first step towards the diffusion of clinical IT solutions into aged care sector. © 2007 IEEE.

关键词： Health care

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Towards Bridging the Gap between Goal-Oriented Requirements engineering and Compositional Architecture Development

Towards Bridging the Gap between Goal-Oriented Requirements ...

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Workshop on Sharing and Reusing Architectural Knowledge - Architecture, Rationale, and Design Intent (SHARK/ADI)

作者： Sebastian Herold Andreas Metzger Andreas Rausch Heiko Stallbaum Institute for Computer Science-Software Systems Engineering Clausthal University of Technology Clausthal-Zellerfeld Germany Institute for Computer Science and Business Information Systems-Software Systems Engineering University of Duisburg-Essen Essen Germany

关键词： Design engineering computer architecture Concrete software systems computer science Systems engineering and theory information systems Knowledge engineering Joining processes Marketing and sales

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Energy Efficient Multi-rate Based Time Slot Pre-schedule Scheme in WSNs for Ubiquitous Environment

Energy Efficient Multi-rate Based Time Slot Pre-schedule Sch...

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IEEE Asia-Pacific Conference on Services Computing (APSCC)

作者： Wei Wei Yong Qi Saiyu Qi Di Hou Wei Wang Min Xi Qingsong Yao Institute of Computer Software and Theory School of Electronic and Information Engineering Xi''an Jiaotong University Xi'an China Computer and Electronic Engineering Department University of Nebraska Lincolnshire USA

Nowadays, smart spaces occupy an essential part of ubiquitous computing environment. The spaces integrated with wireless sensors networks, actuators and context-aware services become part of our daily life. Smart spaces are equipped with a large number of wireless sensors that aim to collect large quantities of context information, during the process, there exists a large amount of collisions and energy consumption. Therefore, this paper provides a novel multi-rate based local framing pre-schedule scheme to further reduce collisions and improve energy efficiency in CSMA/TDMA hybrid MAC layer of wireless sensor network. This MAC combines CSMA and TDMA functionalities together while obviates their shortcomings. Having been assigned, slot 0 is preserved as the pre-schedule slot, to inform neighbor nodes the schedule of the senders. During the pre-schedule slot, each node knows exactly the schedule of other neighbor nodes. Multi-rate and power scaling are applied to achieve further energy saving by adpoting an acceptable rate rather than maximum rate. Data rate is dynamically adjusted according to the traffic load of sending nodes, in an energy efficient data rate, to save energy. Being compared with Z-MAC in terms of performances, local framing pre-schedule and multi-rate in this experiment achieved further energy efficiency.

关键词： Energy efficiency Wireless sensor networks Multiaccess communication Time division multiple access Ubiquitous computing Actuators Context-aware services Intelligent sensors Energy consumption Telecommunication traffic

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Allotropy Programming Paradigm for Ubiquitous Computing Environment

Allotropy Programming Paradigm for Ubiquitous Computing Envi...

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International Conference on Convergence information Technology

作者： Wei Wei Saiyu Qi Yong Qi Wei Wang Min Xi Institute of Computer Software and Theory School of Electronic and Information Engineering Xi''an Jiaotong University Xi'an China Computer and Electronic Engineering Department University of Nebraska Lincoln USA

ISBN: (纸本)9781424431779

Object-oriented method, agent- oriented programming method, aspect-oriented of programming method, formal specification languages, component-based software designing method,.... This incomplete list of methods proposed to solve a conventional well-known problem: how to enhance a software of flexibility and ubiquitous ability. Programming methods have been the crucial task during the past decades, and the results still have not been successful yet. Constructing a suitable programming model for ubiquitous computing based on the pervasive spaces is pedestal in improving the flexibility and adaptability, enhancing the robusticity of ubiquitous systems, and creating an open platform for interoperability, complexity and multiplicity. There are many programming models have been proposed and studied for their feasibilities as the groundwork for implementing in the ubiquitous spaces. We contrast their advantages and disadvantages.

关键词： Ubiquitous computing Pervasive computing Object oriented modeling computer architecture Context modeling Programming profession Object oriented programming Dynamic programming Power system modeling Space technology

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High-performance strategy for optimizing web services

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Jisuanji Yanjiu yu Fazhan/computer Research and Development 2007年第7期44卷 1191-1198页

作者： Li, Lei Niu, Chunlei Chen, Ningjiang Wei, Jun Department of Computer Science and Technology University of Science and Technology of China Hefei 230026 China Technology Center of Software Engineering Institute of Software Chinese Acad. of Sci. Beijing 100080 China College of Computer and Electronic Information Guangxi University Nanning 530004 China

Web services are the mainstream distributed computing technology to construct a service-oriented architecture (SOA). Over the past few years, lots of works have been carried out in comparing SOAP with binary protocols, such as Java RMI and CORBA. These researches show that there is a dramatic difference in the amount of encoding necessary for data transmission, when XML is compared with the binary encoding style, and all these researches have proven that SOAP, because of its reliance on XML, is inefficient compared with its peers in distributed computing. Although the performance of Web services is adequate for many important purposes, processing speed unfortunately remains to be a problem in more demanding applications. Some limitations are inherent in core features of XML: it is text based, flexible in format, and carries redundant information. Aiming at this question, a new approach to improve Web services performance is proposed. To avoid the cost brought by the traditional XML parsing and Java reflection at runtime, a specific SOAP message processor is generated dynamically for each Web service, which can create Java object for service business invoking by scanning SOAP message only once. The given experiments show that the approach can effectively improve the performance of Web service by incorporating the SOAP message processor into the SOAP engine.

关键词： Web services

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Testing Intrusion Detection Systems in MANET: A Comprehensive Study

Testing Intrusion Detection Systems in MANET: A Comprehensiv...

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Annual Conference on Communication Networks and Services Research (CNSR)

作者： Hadi Otrok Joey Paquet Mourad Debbabi Prabir Bhattacharya Concordia Institute for Information Systems Engineering Department Computer Security Laboratory Computer Science and Software Engineering Department Concordia University Montreal QUE Canada

In this paper, we study the problem of testing intrusion detection systems (IDS) in mobile ad hoc networks (MANET). Testing is achieved by simulating different measurements. We modify the testing measurements of infrastructure-based networks to be compatible with the characteristics of MANET. Moreover, we add some new features and their associated measurements that we believe important for testing new proposed IDS. The modified measurements with the new added ones form a set of measurements that will be used throughout the testing process. To the best of our knowledge, there has not been any work done for testing IDS in MANET. Simulators are the most common tools used for testing the IDS. Therefore, we add some precautions for choosing a simulator and a list of available simulators. The precautions will help researchers to test the measurements efficiently and the list of simulators will guide them to select one according to their needs. Finally, we present some input parameter precautions that help on having more trustworthy testing results.

关键词： System testing Intrusion detection Mobile ad hoc networks Wireless sensor networks Ad hoc networks software testing Computational modeling Personal digital assistants Wireless networks Monitoring

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Evolution of web applications with aspect-oriented design patterns

Evolution of web applications with aspect-oriented design pa...

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2nd International Workshop on Adaptation and Evolution in Web Systems engineering, AEWSE 2007

作者： Bebjak, Michal Vranić, Valentino Dolog, Peter Institute of Informatics and Software Engineering Faculty of Informatics and Information Technology Slovak University of Technology Ilkovičova 3 84216 Bratislava 4 Slovakia Department of Computer Science Aalborg University Fredrik Bajers Vej 7 DK-9220 Aalborg EAST Denmark

It is more convenient to talk about changes in a domainspecific way than to formulate them at the programming construct level or-even worse-purely lexical level. Using aspect-oriented programming, changes can be modularized and made reapplicable. In this paper, selected change types in web applications are analyzed. They are expressed in terms of general change types which, in turn, are implemented using aspect-oriented programming. Some of general change types match aspect-oriented design patterns or their combinations.

关键词： Aspect oriented programming

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