检索结果-内蒙古大学图书馆

A direction-based search algorithm in P2P network

Journal of Computational Information Systems 2010年第1期6卷 25-31页

作者： Liu, Xiaonan Fang, Zhiyi Tang, Huanhuan 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

We researched one search algorithm based on direction in the unstructured P2P network, analyzed the limited insufficiencies of this algorithm to the search speed, we proposed the improved direction search algorithm based on LAN agent-ABDS algorithm. We expounded the basic thought and the design principle of ABDS algorithm, carried on the theoretical analysis to the aspects of accuracy and parameter value. We took simulation experiments to the improved algorithms, carried on the quantification analysis to the improved algorithms through the experimental datum, drew up charts with the experimental datum, presented the network search process through the images, all which made the complex problems be more clearer and direct-viewing. Simulation experiments verify the improved algorithms improve the search speed of the P2P network, shorten the search response time. Copyright © 2010 Binary Information Press.

关键词： Learning algorithms

来源：评论

学校读者我要写书评

暂无评论

Enhancing GPSR's credibility using experienced trustiness for VANET

引用

Journal of Computational Information Systems 2010年第8期6卷 2537-2544页

作者： Liu, Yanheng He, Junting Wang, Jian 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

Vehicular ad hoc network (VANET) is a kind of self-organizing ad hoc network, which is specifically designed for communication among vehicles. In VANET, a source vehicle must rely on intermediate vehicles to forward its packets along multi-hops to the destination vehicle. Due to the lack of center infrastructure in such networks, secure and reliable packet delivery is challenging. In this paper, we design a robust cooperative trusted routing protocol for VANET, particularly in the presence of malicious nodes. We establish the trust relationships among nodes by introducing the concept of experienced trustiness, based on which we design a new forwarding rule to encourage cooperative behaviors. Also we provide some recommendatory methods to calculate the experienced trustiness value. The simulations show that our scheme behaves better than the original GPSR and the Trust-Aware GPSR against malicious nodes. Finally, the extensive numerical results about the impacts of different scenarios (highway, suburb, and urban) on performance are given. Copyright © 2010 Binary Information Press.

关键词： Vehicular ad hoc networks

来源：评论

学校读者我要写书评

暂无评论

Improving Incremental Diagnosis with Choosing Measurement Order

Improving Incremental Diagnosis with Choosing Measurement Or...

引用

2010 International Conference of Informationa Science and Management engineering(2010年信息科学与管理工程国际学术会议 ISME 2010)

作者： Xiangfu Zhao Dantong Ouyang College of Mathematics Physical and Information Engineering Zhejiang Normal University Jinhua China Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education Jilin Univ

There may be many groups of candidate results after the step of candidate generation in model-based diagnosis. Hwee Tou Ng proposed the Inc-Diagnose approach to further reduce the candidate results. However, the efficiency of Inc-Diagnose may not be very good. Firstly, we give some correction of IncDiagnosis by applying it to a real example. Then, we propose an improved approach with choosing the order of measurements for incremental diagnosis. Example results show that our approach has better efficiency.

关键词： model-based diagnosis measurement order incremental diagnosis

来源：评论

学校读者我要写书评

暂无评论

A diversity-guided heuristic-based genetic algorithm for triangulation of Bayesian networks

A diversity-guided heuristic-based genetic algorithm for tri...

引用

International Conference on Networked computing and Advanced Information Management (NCM)

作者： Xuchu Dong Haihong Yu Dantong Ouyang Yuxin Ye Yonggang Zhang Department of Computer Science and Technology Jilin University China Key Laboratory of Symbolic Computation and Knowledge Engineering Ministry of Education Changchun Jilin China

ISBN: (纸本)9781424476718

For the optimization problem about triangulation of Bayesian networks, a novel genetic algorithm, DHGA, is proposed in this paper. DHGA employs a heuristic-based mutation operation. Moreover, it uses population diversity to identify stagnation and convergence as well as to guide the search procedure. Experiments on representative benchmarks show that DHGA posses better performance and robustness than other swarm intelligence methods.

关键词： Bayesian methods

来源：评论

学校读者我要写书评

暂无评论

Complete 3D model reconstruction using two types of depth sensors

Complete 3D model reconstruction using two types of depth se...

引用

2010 IEEE International Conference on Intelligent computing and Intelligent Systems, ICIS 2010

作者： Mu, Guangyu Liao, Miao Yang, Ruigang Ouyang, Dantong Xu, Zhiwen Guo, Xiaoxin Department of Computer Science and Technology Jilin University Changchun China College of Information Jilin University of Finance and Economics Changchun China Department of Engineering University of Kentucky Center for Visualization and Virtual Environment Lexington KY United States Department of Computer Science and Technology Jilin University Key Laboratory of Symbolic Computation and Knowledge Engineering of MOE Changchun China

ISBN: (纸本)9781424465835

We propose a fast and simple application system of 3D model reconstruction. We acquire range images by using a combination of a regular camera and two types of depth sensors. The reconstruction of a 3D model consists of four key steps: (i) Initial alignment either feature tracking or the 4-points congruent sets algorithm is used to align surfaces captured at different frames. (ii)The iterative closest point (ICP) method is applied to further align the piecewise surfaces from the last step. (iii) The surfaces are merged into a whole 3D model by the volumetric method. (iv) In the refinement step, we fill holes and produce a complete 3D model that approximates the original model with robust repair of polygonal models. At last, we present the experimental results which show that the errors between our reconstructed model and the ground truth are less than 1%. ©2010 IEEE.

关键词： Iterative methods

来源：评论

学校读者我要写书评

暂无评论

Design and implementation of WPKI-based Gas station online payment system

Design and implementation of WPKI-based Gas station online p...

引用

Chinese Control Conference (CCC)

作者： Jian Wang Yanheng Liu Tianzhe Dong Key Laboratory of Symbolic Computation and Knowledge Engineering Ministry of Education Changchun China College of Computer Science and Technology Jilin University Changchun P. R. China College of Computer Science and Technology Jilin University Changchun China Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education Changchun 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 system. By 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： Servers Protocols Authentication Business Encryption Public key

来源：评论

学校读者我要写书评

暂无评论

A New Framework for IPv6 Crossing GPRS Network

A New Framework for IPv6 Crossing GPRS Network

引用

The 2010 International Conference on Computer Application and System Modeling(2010计算机应用与系统建模国际会议 ICCASM 2010)

作者： Shujing Li Siguo Chen Jian Wang Yanheng Liu College of Computer Science and Technology Jilin University Changchun 130012 China Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education Jilin UniversityChangchun 130012 China

ISBN: (纸本)9781424472352

In order to realize that IPv6 (Internet Protocol version 6) clients are able to visit remote IPv6 servers through GPRS (General Packet Radio Service), we proposed a new and feasible framework. After discussing the limitations of those existing methods which aren't suitable for GPRS network, we then detailedly demonstrated the proposed framework, and also gave the implementations based on NetFilter framework, Libnet as well as Libipq. Simulation results show that the isolated IPv6 areas can be efficiently connected by GPRS network through the presented framework.

关键词： IPv4 IPv6 GPRS Wireless Access tunnel

来源：评论

学校读者我要写书评

暂无评论

Research on Indoor Wireless Localization System for Radioactive Sources Based on ZigBee

Research on Indoor Wireless Localization System for Radioact...

引用

International Conference on computing Control and Industrial engineering (CCIE)

作者： Ruixue Li Zhiyi Fang Baocong Hao Fengjie Yang College of Computer Science and Technology Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education Jilin University Changchun China Qiming Information Technology Company Limited Changchun China

ISBN: (纸本)9781424467501

This paper made a good many research on the related theory about indoor localization technology, and pointed out the key techniques for the proposed remote wireless monitoring system solution for radioactive sources. Because of the specificity of system monitoring objects-radioactive sources, ZigBee technology was adopted to implement the monitoring system, by studying the typical indoor localization technology. Functional requirements and difficulties in implementation, during the indoor localization of radioactive sources, were analyzed from three points of view. After the detailed planning of the ZigBee network nodes, the indoor wireless localization system for radioactive sources was designed. Four major functional modules, including system management, serial communication, data processing, and data storage, were devised to realize the host computer. Testing environment was constructed to test the localization system. Test results show that the indoor wireless localization system can meet users' requirements, controlling the localization error in the range of 3m.

关键词： ZigBee Remote monitoring Control systems System testing Wireless sensor networks Indoor environments Radio control Educational technology Paper technology Global Positioning System

来源：评论

学校读者我要写书评

暂无评论

Soil fertility grading with Bayesian Network transfer learning

Soil fertility grading with Bayesian Network transfer learni...

引用

International Conference on Machine Learning and Cybernetics (ICMLC)

作者： Hai-Yang Jia Juan Chen He-Long Yu Da-You Liu College of Computer Science and Technology Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education Jilin University Changchun Jilin China College of Information technology Jilin agricultural University Changchun Jilin China

Soil fertility grading is an important issue in the agriculture domain, AI based approach has been applied recently. But in most circumstance data obtaining is a expensive and time consuming procedure, sometimes even impossible. This paper presents a Bayesian Network based transfer learning algorithm. The existing training results can be transferred between the nearby land squares. The proposed algorithm considers both the similarity between the learning task and the geographical position of the land squares. Empirical experiment were implemented to prove the efficiency of the algorithm.

关键词： Bayesian methods Machine learning Learning Soil Random variables Machine learning algorithms Training data

来源：评论

学校读者我要写书评

暂无评论

An Efficient Method for Calculating Qualitative Spatial Relations

引用

电子学报(英文版) 2009年第1期18卷 42-46页

作者： WANG Shengsheng LIU Dayou College of Computer Science and Technology Key Laboratory of Symbolic Computing and Knowledge Engineering of Ministry of Education Jilin University Changchun 130012 China

Qualitative spatial relations are widely used in geospatial ontologies, geospatial (semantic) web services, spatial description logics etc. Methodology to obtain qualitative spatial relations (especially complex spatial relations) from Geographical information system (GIS) has not been studied in previous literatures. An efficient method for calculating complex qualitative spatial relations is discussed here. First, the multi-granularities approximate representation of spatial objects is proposed, it is designed for GIS object types (such as polygon), and requires less process time. Then some algorithms for calculating complex spatial relations based on the multi-granularities approximate representation are given. Finally, this method is implemented and used to obtain topology and direction relations from world map. The analysis and test results show that this method supports complex and integrated spatial relations and requires less process time than traditional method. This method is suitable for obtaining spatial relations for geospatial ontologies and other applications.

关键词：空间关系计算地理信息系统地理本体信息系统设计网络服务描述逻辑空间对象

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：