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Science china(Information Sciences) 2011年第11期54卷 2454-2458页

作者： liu yanheng 1,2,liu xuelian 3 & wang jian 1,2 1 key laboratory of symbolic computation and knowledge engineering of ministry of education,jilin university,changchun 130012,china 2 College of Computer Science and Technology,jilin university,changchun 130012,china 3 College of Software,jilin university,changchun 130012,china 1. key laboratory of symbolic computation and knowledge engineering of ministry of education Jilin University Changchun 130012 China2. College of Computer Science and Technology Jilin University Changchun 130012 China3. College of Software Jilin University Changchun 130012 China

Functions and call relations are extracted into nodes and edges,respectively,by which a novel topological model is *** directional edges and the corresponding weight values express the call relations and tightness *** introducing two concepts of function fault-tolerant capability and software fault intensity and by designing a allocation rule on fault-tolerant capability,a cascading fault model is built to explore fault propagation *** on practical software networks show that a weak fault intensity,a small number of initial faults,and a strong fault-tolerant capability can slow down the spreading *** functions with more call relations and more closer tightness contribute more to the stability of the whole system.

关键词： software fault tolerant cascading faults fault-tolerant capability fault intensity

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A Simple Cascading Failures Model of Internet

A Simple Cascading Failures Model of Internet

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第二十七届中国控制会议

作者： wang jian 1,2,liu yanheng 1,2,Wei Da 1,2,Zhang Jing 1,2 1.College of Computer Science and Technology,jilin university,changchun 130012,P.R.china 2.key laboratory of symbolic computation and knowledge engineering of ministry of education,jilin university,changchun 130012,P.R.china

Internet is a complex network with the characteristic of self-organization criticality,and the evolvement of network will inevitably lead to a critical state,which makes the probability of system happening cascading failures increase *** paper introduces the characteristics of dynamics and topology of Internet,analyzes the reasons of cascading fail-ures occurred in details,discusses the potential causes of the characteristic of self-organization and then puts forward a simple fault propagation model called ICFM（Internet Cascading Failures Model） .Simulation results show that the Internet does have the characteristic of self-organization criticality and the model can contribute a lot to the detection and control of cascading failures of Internet.

关键词： Complex network Internet Cascading failures Propagation model Network topology

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Design and Implementation of WPKI-based Gas Station Online Payment System

Design and Implementation of WPKI-based Gas Station Online P...

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第二十九届中国控制会议

作者： wang jian1,2,liu yanheng1,2,DONG Tianzhe1,2 1 College of Computer Science and Technology,jilin university,changchun 130012,P.R.china 2 key laboratory of symbolic computation and knowledge engineering of ministry of education,changchun 130012,P.R.china

Through analyzing the security problems which exist in general on-line payment systems,this paper proposes a scheme based on WPKI（Wireless Public key Infrastructure）and further designs and implements a gas station on-line payment *** using WPKI technology which includes SSL（Secure Sockets Layer）protocol,digital signature and digital certificate,the designed on-line payment system can achieve data privacy,authenticity,integrity and non-repudiation during on-line payment process.

关键词： Online Payment WPKI CA Digital Certificate

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Design and Implementation of a Trusted Remote Remediation Framework for Vehicle Software

Design and Implementation of a Trusted Remote Remediation Fr...

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第二十九届中国控制会议

作者： wang jian 1,LI Bin 2,liu yanheng 3 1 College of Computer Science and Technology,jilin university,changchun 130012,P.R.china2 Mathemetics School,jilin university,changchun 130012,P.R.china3 key laboratory of symbolic computation and knowledge engineering of ministry of education,changchun 130012,P.R.china

With the rapid development of vehicle electronic systems,the vehicle software failure rate has also been rising over *** the convenient and effective maintenance on the vehicle software has become a fundamental block constraining the progress of vehicle electronic industry.A trusted remote remediation framework for vehicle software is presented and realized to enable drivers to online upgrade version or fix bug without needing for driving the vehicles back to the factories or using the specific *** this framework,the trusted remediation server takes responsibility for managing and providing the patch programs and the trusted remediation client can download directly from the remediation server to upgrade programs or fix software errors,achieving the self-repair in complex vehicular networks.

关键词： Trusted Channel Vehicle Software Remote Remediation Bidirectional Authentication

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A NEW CASCADING FAILURE MODEL WITH DELAY TIME IN CONGESTED COMPLEX NETWORKS

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Journal of Systems Science and Systems engineering 2009年第3期18卷 369-381页

作者： jian wang yanheng liu Yu JIAO College of Computer Science and Technology Jilin University Changchun 130012 China key laboratory of symbolic computation and knowledge engineering of ministry of education Jilin University Changchun 130012 China

Cascading failures often occur in congested complex networks. Cascading failures can be expressed as a three-phase process： generation, diffusion, and dissipation of congestion. Different from the betweenness centrality, a congestion function is proposed to represent the extent of congestion on a given node. Inspired by the restart process of a node, we introduce the concept of ＂delay time,＂ during which the overloaded node Cannot receive or forward any traffic, so an intergradation between permanent removal and nonremoval is built and the flexibility of the presented model is demonstrated. Considering the connectivity of a network before and after cascading failures is not cracked because the overloaded node are not removed from network permanently in our model, a new evaluation function of network efficiency is also proposed to measure the damage caused by cascading failures. Finally, we investigate the effects of network structure and size, delay time, processing ability, and traffic generation speed on congestion propagation. Cascading processes composed of three phases and some factors affecting cascade propagation are uncovered as well.

关键词： Complex networks cascading failures congestion effects propagation model

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Model for human dynamics based on habit

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Chinese Science Bulletin 2010年第24期55卷 2744-2749页

作者： JIAO Yu liu yanheng wang jian wang Jing College of Computer Science and Technology Jilin University Changchun 130012 China key laboratory of symbolic computation and knowledge engineering of ministry of education Jilin University Changchun 130012 China Archives of jilin university Changchun 130012 China

The quantitative understanding of human behavior is a central question of modern science. Because of the complexity of human behavior, it is almost impossible to seek regularities in human dynamics. It is assumed that human actions are randomly distributed in time in current models for human dynamics. While the characteristics of human behavior combined with the queue model are considered as model for human dynamics based on habit to explain bursts and heavy tails in human dynamics more exactly. Normal distribution is used to simulate intervals of succession of events, and random parameters are set as unexpected events disturbing habit behaviors. Moreover, duration of events are proposed to imitate continual attention to some events in human behaviors.

关键词：人类行为基于模型动力学模型学习突发事件时间间隔现代科学随机分布

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