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A Dynamic Probability Fault Localization Algorithm Using Digraph

A Dynamic Probability Fault Localization Algorithm Using Dig...

引用

International Conference on Natural Computation (ICNC)

作者： Chunfang Li Lianzhong Liu Xiaojie Pang School of Automation Beijing Aeronautics and Astronautics University Beijing China School of Computer BUAA Key Laboratory of Beijing Network Technology Beijing China Network Center Hebei Institute of Physical Education Shijiazhuang China

ISBN: (纸本)9781424445424

Analyzed here is a probability learning fault localization algorithm based on directed graph and set-covering. The digraph is constituted as following: get the deployment graph of managed business from the topography of network and software environment; generate the adjacency matrix (M a ); compute the transitive matrix (M a 2 ) and transitive closure (M t ) and obtain dependency matrix (R). When faults occur, the possible symptoms will be reflected in R with high probability in fault itself, less probability in Ma, much less in M a 2 and least in M t . MCA+ is a probability max covering algorithm taking lost and spurious symptom into account. DMCA+ is dynamic probability updating algorithm through learning run-time fault localization experience. When fail to localize the faults, probabilities of real faults will be updated with an increment. The simulation results show the validity and efficiency of DMCA+ under complex network. In order to promote detection rate, multi-recommendation strategy is also investigated in MCA+ and DMCA+.

关键词： Uncertainty computer networks Bipartite graph Physics computing Aerodynamics Runtime Switches Fault diagnosis Automation Educational technology

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A method for constructing simplified kernel model based on kernel-MSE

A method for constructing simplified kernel model based on k...

引用

Pacific-Asia Workshop on Computational Intelligence and Industrial Application, PACIIA

作者： Qi Zhu Yong Xu JinRong Cui ChangFeng Chen JingHua Wang XiangQian Wu YingNan Zhao Key Laboratory of Network Oriented Intelligent Computation Shenzhen Graduate School Harbin Institute of Technology Shenzhen China Department of Computer Science and Technology Harbin Institute of Technology Harbin China Department of Computer Science and Technology Nanjing University of Information Science and Technology Nanjing China

In this paper, we derive an efficient nonlinear feature extraction method from naive Kernel Minimum Squared Error (KMSE) method. The most contribution of the derived method is its feature extraction procedure that is much more computationally efficient than naive KMSE. Differing from naive KMSE that exploits some linear combination of the total training patterns to express the discriminant vector in feature space, the derived method attempts to select out a small number of patterns (referred to as ¿significant nodes¿ in this paper) from the training set and exploits some linear combination of ¿significant nodes¿ to approximate to the discriminant vector in feature space. According to the following two principles, an algorithm for producing ¿significant nodes¿ is designed. The ¿significant node¿ set should well represent the whole training patterns, and each ¿significant node¿ should contribute much for the feature extraction result. Experimental results on several benchmark datasets illustrate our method can efficiently classify the real-world data with the high recognition accuracy.

关键词： Kernel Vectors Feature extraction Space technology Computational intelligence computer science Algorithm design and analysis computer industry Application software Laboratories

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A Model Analyzing Method for OWL-S Services Composition Based on High Level Petri Net

A Model Analyzing Method for OWL-S Services Composition Base...

引用

International Symposium on Knowledge Acquisition and Modeling, KAM

作者： Shaoran Dong Zengzhi Li State key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing China Institute of Computer System Architecture and Network Xi''an Jiaotong University Xi'an China

To analyze model of Web services composition, firstly analyze and abstract dataflow and control construct in OWL-S process to build high level Petri net model, then describe Petri net in Poses++ language, at last simulate Petri net with Poses++ to check data type and deadlock and calculate service performance. The experiment shows that this model analyzing method is able to accomplish type checking and deadlock and performance analyzing.

关键词： Performance analysis Web services System recovery Data analysis Petri nets Ontologies OWL Analytical models Knowledge acquisition computer networks

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A large family of prime-phase sequences with low correlation

A large family of prime-phase sequences with low correlation

引用

International Workshop on Signal Design and Its Applications in Communications (IWSDA)

作者： Ni-Gang Sun Chang-Lu Lin Key Laboratory of Network Security and Cryptology Fujian Normal University Fuzhou Fujian China Department of Computer Science and Engineering East China University of Science and Technology Shanghai China

A large family of p-phase highest coordinate sequences, where p is an odd prime, is constructed by using the highest coordinate of the generalized Kerdock codes over the ring Z pl , for l ges 3. Utilizing the local Weil bound and spectral analysis over the additive group of Z pl , we derive an estimate of the correlation of the sequences. And the result shows that these sequences have low nontrivial autocorrelation and crosscorrelation, which makes it possible as code sequences in CDMA communication systems.

关键词： Multiaccess communication Autocorrelation Sun computer science computer security Cryptography Electronic mail Spectral analysis Interference Binary sequences

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Particle Swarm Algorithm for the Quality of Service-Oriented Web Services Selection

Particle Swarm Algorithm for the Quality of Service-Oriented...

引用

International Symposium on Knowledge Acquisition and Modeling, KAM

作者： Hong Xia Zengzhi Li State key Laboratory of Networking and Switch Technology Beijing University of Posts and Telecommunications Beijing China Institute of Computer System Architecture and Network Xi''an Jiaotong University Xi'an Shaanxi China

Existing Web services composition technology, lack of services selecting. A particle swarm optimization algorithm based on the multi-objective optimization strategies was provided to address quality of services to choose the issue of global optimization. It is to transform Web services select the overall optimization problem with QoS into a multi-objective constrained optimization problem based on Qos, using multi-objective PSO intelligent theory, by a number of Qos parameters optimized at the same time, and ultimately produce a set of constraints to meet the Pareto optimal solution. The experimental results show the feasibility and efficiency of the algorithm.

关键词： Particle swarm optimization Web services Quality of service Constraint optimization Pareto optimization Service oriented architecture Switches Constraint theory Logic Optimization methods

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Verification Web Services Composition Based on OWL-S

Verification Web Services Composition Based on OWL-S

引用

International Symposium on Knowledge Acquisition and Modeling, KAM

In order to ensure the correctness and reliability of Web services composition based on OWL-S, verify the interaction protocol of Web services. It is provided that three lay architecture. Composition service based on OWL-S, GA model is the middle model and the Promela model is the verification model, SPIN as a model validator. The OWL-S composition Web services transform a top-down conversation protocol process into a GA model, use WAST tool into Promela model, the SPIN tool analysis and verification structure and performance of composition services. This method is flexibility and scalability which provide a solution for Web services composition model verification.

关键词： Web services XML Protocols State-space methods Scalability Service oriented architecture computer architecture Switches Automata Asynchronous communication

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A DYNAMIC FAULT LOCALIZATION ALGORITHM USING DIGRAPH

A DYNAMIC FAULT LOCALIZATION ALGORITHM USING DIGRAPH

引用

2009 International Conference on Machine Learning and Cybernetics(2009机器学习与控制论国际会议)

作者： CHUN-FANG LI LIAN-ZHONG LIU XIAO-JIE PANG School of Automation Beijing University of Aeronautics and Astronautics (BUAA) Beijing 100191 Chi Key Laboratory of Beijing Network Technology School of computer BUAA Beijing 100191 China Network Center Hebei Institute of Physical Education Shijiazhuang 050041 China

Analyzed here is a dynamic learning fault localization algorithm based on directed graph fault propagation model and feedback control. Input and output of the algorithm are named as fault and hypothesis respectively. Because of the complexity and uncertainty of fault and symptom, it's difficult to accurately model the relationship of them in probabilistic fault localization. Fault localization algorithm depends on the prior specified model, and the parameter and structure of model is approximate correct and often differ from the real situation. So we propose DMCA+ algorithm which has 3 features: reduce the requirement for accuracy of initial conditions;statistically learn to automatically adapt the probability distribution of fault occurrence while localizing fault;generalize the MCA+ algorithm of no feedback. The feedback learning is similar with proportional adjusting of PID control, but increment is sensitive to detection rate because little increment adjusts output too slowly and big will result in a large number of error hypotheses. The simulation results show the validity and efficiency of dynamic learning under complex network. In order to promote detection rate, optimizing measures are also discussed.

关键词： Fault localization Fault propagation model Directed graph Uncertainty reasoning Machine learning

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An Improved Identity-Based Group Signature Scheme

An Improved Identity-Based Group Signature Scheme

引用

International Conference on Computational Intelligence and Security

作者： Zuowen Tan Key Laboratory of Network Security and Cryptology School of Mathematics and Computer Science Fujian Normal University Fuzhou Fujian China School of Information Technology Jiangxi University of Finance and Economics Nanchang Jiangxi China

ISBN: (纸本)9781424454112

In a group signature scheme, a group member signs messages anonymously on behalf of the group. However, in the case of a dispute, the actual group signer's identity can be revealed by a designated entity. In this paper, we propose a new identity-based group signature scheme using bilinear maps. The group signature scheme is well suited for large groups, i. e., the length of the group' s public key and the length of signatures are independent on the size of the group. Our signature scheme is based on bilinear maps. Furthermore, a group member can sign many messages using the same key pair. Cryptanalysis shows that the proposed group signature scheme is secure under the computational Diffie Hellman problem called CDHP assumption. And it is also more efficient than previous ones satisfying these requirements.

关键词： Identity-based encryption Public key Public key cryptography Information security Elliptic curve cryptography Computational intelligence Information technology Finance computer security Mathematics

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Access Model of Web Users Based on Multi-chains Hidden Markov Models

Access Model of Web Users Based on Multi-chains Hidden Marko...

引用

International Conference on Internet Computing in Science and Engineering (ICICSE)

作者： Kangfeng Zheng Yixian Yang Xiujuan Wang Shize Guo Key Laboratory of network and information attack & defence technology of MOE Beijing University of Posts and Telecommunications Beijing China College of Computer Sciences Beijing University of Technology Beijing China Research Institute of the General Staff of the PLA Beijing China

How to distinguish abnormal access from normal ones is the key problem in Distribution Denial of service(DDoS) attack detection. This research aims at finding out the major difference between the abnormal access and the normal ones in application layer. To this end, the paper conducts modeling on Web users' access behaviors based on hidden Markov model(HMM) with multiple chains and puts forward a method to identify abnormal access. Tests on simulation data indicate that this model can undo Web users access to a certain degree and discern the abnormal access well.

关键词： Hidden Markov models Testing Web and internet services computer crime computer networks Distributed computing Telecommunication traffic Web services Web pages IP networks

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A Role and Task-Based Workflow Dynamic Authorization Modeling and Enforcement Mechanism

A Role and Task-Based Workflow Dynamic Authorization Modelin...

引用

International Conference on Information Science and Engineering (ICISE)

作者： Xiangrong Zu Lianzhong Liu Yan Bai Computer Science & Technology Department North China electric power university Beijing China Key Laboratory of Beijing network technology School of computer Science & engineering Beihang University Beijing China Automation Science & engineering Department North China electric power university Beijing China

ISBN: (纸本)9781424449095

Current workflow products can support more complex modeling of business processes, workflow engine mechanism is well researched, but the link between organizational elements and process activities is less well understood. In access control, most products can only support fixed role-based task assignment, not enough in considering more complex security policies, such as DSOD, task binding of duties, and temporal constraints, that important in dynamic workflow system. This paper examines workflow access control requirement in practice, analyzes WFMC workflow meta-model, and adopts the R&TBAC approach to separate role-based organization and task-based authorization-step modeling, and especially designs an agent-based dynamic policy enforcement mechanism to bridge the gap. The intelligent task assigning agent to be defined as a virtual participant in workflow process definition, and creating within workflow engine controlled available task instance, acts as to evaluate task dynamic authorization policy to provide eligible task participant role-set based on its information model. This paper gives a formal specification of the workflow authorization model, and designs the agent information model, assigning policy model, and function model in detail. The modeling approach can widely adapt to various existing workflow systems and can automatically change policy as enterprise organization or business process definition need changing.

关键词： Authorization Access control Engines Power engineering and energy Power engineering computing Intelligent agent Information security Information science computer networks Automation

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