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PeerMD:A P2P Molecular Dynamics Simulation Framework Based on Web Services

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Wuhan University Journal of Natural Sciences 2008年第4期13卷 471-474页

作者： HUANG Baohua HE Lin BAO Yang LI Zhuoya LI Ruixuan School of Basic Medical Sciences Huazhong University of Science and Technology Wuhan 430030 Hubei China College of Computer Science and Technology HuazhongUniversity of Science and Technology Wuhan 430074 HubeiChina

PeerMD, a P2P molecular dynamics simulation frame-work based on Web services is proposed. It utilizes rich free CPU time and network bandwidth of P2P networks to provide enough resources for dynamics simulation of bio-macromolecule, and has resolved the problem that it is difficult to interoperate between heterogeneous peers in P2P environment through Web services. Structure of PeerMD is given. Function, input and output of molecular dynamics simulation Web service are defined. Processes of publishing, discovering and invoking of molecular dynamics simulation Web service based on multi-level SuperPeer are given. A protocol system of PeerMD is implemented on a basic P2P platform JXTA, and experimental simulations of tumor necrosis fact alpha （TNF-α） and two mutations of it are executed on the protocol system. Simulation results show that PeerMD can speed up molecular dynamics simulation perfectly.

关键词： P2P Web services molecular dynamics

TSPN: Term-Based Semantic Peer-to-Peer Networks

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Wuhan University Journal of Natural Sciences 2012年第1期17卷 31-35页

作者： GAO Guoqiang LI Ruixuan LU Zhengding School of Computer Science and Technology HuazhongUniversity of Science and Technology Wuhan 430074 HubeiChina School of Media and Communication Wuhan TextileUniversity Wuhan 430073 Hubei China

In this paper, we propose Term-based Semantic Peerto-Peer Networks （TSPN） to achieve semantic search. For each peer, TSPN builds a full text index of its documents. Through the analysis of resources, TSPN obtains series of terms, and distributes these terms into the network. Thus, TSPN can use query terms to locate appropriate peers to perform semantic search. Moreover, unlike the traditional structured P2P networks, TSPN uses the terms, not the peers, as the logical nodes of DHT. This can withstand the impact of network chum. The experimental results show that TSPN has better performance compared with the existing P2P semantic searching algorithms.

关键词： Term-based Semantic Peer-to-Peer Networks (TSPN) peer-to-peer semantic parsing semantic DHT

Disambiguating Authors by Pairwise Classification

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Tsinghua Science and Technology 2010年第6期15卷 668-677页

作者：林泉王波杜圆王雪至李玉华陈松灿 Department of Computer Science Huazhong University of Science and Technology Department of Computer Science Nanjing University of Aeronautics and Astronautics Department of Computer Science Tsinghua University

Name ambiguity is a critical problem in many applications, in particular in online bibliography sys-tems, such as DBLP, ACM, and CiteSeerx. Despite the many studies, this problem is still not resolved and is becoming even more serious, especially with the increasing popularity of Web 2.0. This paper addresses the problem in the academic researcher social network ArnetMiner using a supervised method for exploiting all side information including co-author, organization, paper citation, title similarity, author＇s homepage, web constraint, and user feedback. The method automatically determines the person number k. Tests on the researcher social network with up to 100 different names show that the method significantly outperforms the baseline method using an unsupervised attribute-augmented graph clustering algorithm.

关键词： disambiguating pairwise classification arnetminer

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移动自组网的访问控制技术研究

计算机科学 2011年第4期38卷 72-75,110页

作者：熊庭刚卢正鼎张家宏华中科技大学计算机科学与技术学院武汉430074 武汉数字工程研究所武汉430074

网络资源的共享与保护是移动自组网需要解决的关键问题之一。运用Voronoi图模型和quorum系统的思想,提出了一种移动自组网的动态路径quorum系统,设计了动态路径quorum的生成算法。基于移动自组网的动态路径quorum系统,提出了基于quorum... 详细信息

网络资源的共享与保护是移动自组网需要解决的关键问题之一。运用Voronoi图模型和quorum系统的思想,提出了一种移动自组网的动态路径quorum系统,设计了动态路径quorum的生成算法。基于移动自组网的动态路径quorum系统,提出了基于quorum系统的移动自组网的分布式访问控制机制,详细描述了节点的身份认证、网络资源的访问控制和权限管理协议。与传统的基于单个节点自身的访问控制机制相比,该访问控制机制具有较强的抗攻击能力和较高的可靠性,能够有效地提高移动自组网的资源共享与保护水平。

关键词：移动自组网 Voronoi图动态quorum系统分布式访问控制

Typed formal model for WS-CDL specification of web services composition

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Journal of Southeast University(English Edition) 2008年第3期24卷 300-307页

作者：辜希武李瑞轩卢正鼎华中科技大学计算机科学与技术学院武汉430074

In order to formally reason and verify web services composition described by web services choreography specification WS-CDL,a typed formal model named typed Abstract WS-CDL（web services choreography description language）for WS-CDL specifications is *** typed Abstract WS-CDL,the syntax of type and session,typing rules and operational semantics are formalized;the collaborations of web services are formally described by sessions;the operational semantics of a session can help to formally reason the execution of the choreography;the typing rules can help to formally check the data type consistency of exchanged information between web services and capture run-time errors due to type ***,the concepts of type assumption set extension and type assumption set compatibility are proposed,and the merging algorithm of type assumption sets is defined so as to eliminate type assumption *** on the formal model,typed mapping rules for mapping web services choreography to orchestration is also *** the typed mapping rules,orchestration stubs and their type assumption sets can be generated from a given choreography; thus, web services composition can be verified at choreography and orchestration levels,*** model is proved to have properties of type safety,and how the model can help to reason and verify web services composition is illustrated through a case study.

关键词： typed model web services composition web services choreography description language

Multi-level access control model for tree-like hierarchical organizations

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Journal of Southeast University(English Edition) 2008年第3期24卷 393-396页

作者：於光灿李瑞轩卢正鼎 Mudar Sarem 宋伟苏永红华中科技大学计算机科学与技术学院武汉430074

An access control model is proposed based on the famous Bell-LaPadula （BLP） *** the proposed model,hierarchical relationships among departments are built,a new concept named post is proposed,and assigning security tags to subjects and objects is greatly *** interoperation among different departments is implemented through assigning multiple security tags to one post, and the more departments are closed on the organization tree,the more secret objects can be exchanged by the staff of the *** access control matrices of the department,post and staff are *** using the three access control matrices,a multi granularity and flexible discretionary access control policy is *** outstanding merit of the BLP model is inherited,and the new model can guarantee that all the information flow is under ***,our study shows that compared to the BLP model,the proposed model is more flexible.

关键词： multi-level access control hierarchical organization multiple security tags

Caching Scheme Based on Power-Law Characteristic in Unstructured P2P Networks

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Journal of Southwest Jiaotong University(English Edition) 2009年第3期17卷 177-184页

作者：左翠华李瑞轩卢正鼎 School of Computer Science and Technology Huazhong University of Science and Technology

In order to reduce the traffic load and improve the availability of the shared resources in unstructured P2P networks, a caching scheme combining alternative index and adaptive replication （AIAR） is presented. AIAR uses random walk mechanism to disperse the caching information of resources in the network based on its power-law characteristic, and dynamically adjusts replicas according to the visit frequency on resources and the degree information of peers. Subsequent experimental results show that the proposed AIAR scheme is beneficial to improve the search performance of success rate and respond speed. In addition, compared to some existing caching scheme, AIAR can perform much better in success rate, especially in a dynamic environment.

关键词： P2P (peer-to-peer) Caching scheme Replication Random walk Power law

R^2BAC:基于风险的多自治域安全互操作模型

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通信学报 2008年第10期29卷 58-69页

作者：李瑞轩胡劲纬唐卓卢正鼎华中科技大学计算机科学与技术学院湖北武汉430074

在基于角色访问控制模型的基础上,提出了一种基于风险的多自治域安全互操作模型——R2BAC。R2BAC采用了灵活的互操作关系建立机制,无需第三方实体的参与。将建立互操作问题转换为优化问题,在保证安全性的前提下取得理想的互操作能力。... 详细信息

在基于角色访问控制模型的基础上,提出了一种基于风险的多自治域安全互操作模型——R2BAC。R2BAC采用了灵活的互操作关系建立机制,无需第三方实体的参与。将建立互操作问题转换为优化问题,在保证安全性的前提下取得理想的互操作能力。尽管分布式环境中自治域可随时加入和离开,R2BAC保证了互操作关系的创建与撤消能适应这种动态性。R2BAC引进了风险管理机制,提供了细粒度的授权控制;具有实时监控用户行为、调整用户权限的能力。

关键词：访问控制风险多自治域安全互操作

C2C电子商务交易的信用及风险评估方法研究

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通信学报 2009年第7期30卷 78-85页

作者：李瑞轩高昶辜希武卢正鼎华中科技大学计算机科学与技术学院智能与分布计算实验室湖北武汉430074

提出了一种改进的信用计分方法,该方法采用商品价格的区间分布来对成功交易进行加分,采用信用等级的扣分系数来对不同信用等级的失败交易进行扣分,可以解决信用炒作和周期欺骗问题。通过对信用风险的分析,在改进的信用计分模型的基础上... 详细信息

提出了一种改进的信用计分方法,该方法采用商品价格的区间分布来对成功交易进行加分,采用信用等级的扣分系数来对不同信用等级的失败交易进行扣分,可以解决信用炒作和周期欺骗问题。通过对信用风险的分析,在改进的信用计分模型的基础上,设计了一种网上交易的风险计算方法,该方法可以根据历史交易的情况以及当前交易的价格来对当前交易的风险进行评估。模拟实验结果表明,改进的信用计分方法具有较好的抗信用炒作和周期欺骗效果,所给出的风险评估方法对电子商务交易中的风险分析和预测是比较准确和有效的。

关键词：电子商务信用评价风险评估信任