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A service selection method based on web service clusters

Journal of Applied Sciences 2013年第24期13卷 5734-5738页

作者： Liu, Wei Du, Yu-Yue Yan, Chun College of Information Science and Engineering Shandong University of Science and Technology 266590 Qingdao China The Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University 200092 Shanghai China

Service selection is an essential issue in service discovery based on Web service clusters. The ratio of trust value to price is introduced to select the most suitable service in a cluster. The method of computing the initial trust, the direct trust and the recommendation trust are, respectively presented and the overall trust is derived based on them. The proposed method keeps the balance between the price and service quality. © 2013 Asian Network for Scientific Information.

关键词： Web services

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A universally stable and energy-efficient scheduling protocol for packet switching network

A universally stable and energy-efficient scheduling protoco...

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12th Annual IEEE International Symposium on Network computing and Applications, NCA 2013

作者： Shi, Yangguang Zhang, Fa Liu, Zhiyong Institute of Computing Technology Chinese Academy of Sciences China University of Chinese Academy of Sciences China Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Academy of Sciences China

ISBN: (纸本)9780768550436

Energy efficiency is becoming an important issue in networks. Although some research works have been devoted to this topic, only a little attention has been paid to the stability of the network equipped with the energy conservation mechanisms. In fact, we find that the stability of networks can be undermined in the worst case if it isn't considered with care by the energy conservation *** this paper, we propose an energy-efficient scheduling protocol which can guarantee the stability of the network in all cases. We start by building a new model which can be used to verify the stability of the network equipped with the energy conservation mechanisms. With this model, we transform the packet scheduling problem to a Job Shop Scheduling problem. For this problem, we propose a time-stamp based work-conserving scheduling algorithm - G-FSA. Compared with existing methods, this scheduling algorithm guarantees a tighter bound on the make span of the jobs. Then, we integrate G-FSA with a time partition approach to generate our energy-efficient packet scheduling protocol. It is proved that the obtained protocol can guarantee the stability of network in all cases. And its approximation ratio in terms of energy efficiency can be bounded by O((1+ )) for any > 0, where is an input parameter depending on the hardware infrastructure. Typically, 1

关键词： Scheduling algorithms

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Research on real solutions number of the SHEPWM equations based on the mechanical proving and groebner bases theory

Research on real solutions number of the SHEPWM equations ba...

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Chinese Control Conference (CCC)

作者： Ke-hu Yang Ru-yi Yuan Wen-sheng Yu School of Mechanical Electronic & Information Engineering China University of Mining and Technology Xuzhou Jiangsu CN Integrated Information System Research Center Institute of Automation Institute of Automation Chinese Academy of Sciences Beijing Beijing CN Shanghai Key Laboratory of Trustworthy Computing East China Normal University Shanghai CN

The real solutions number of the switching angles for the SHEPWM inverter has been discussed in this paper. Firstly, the SHEPWM equations were transformed to polynomial equations with inequality constrains by using the multiple-angle formulas and variables substitution, then, the equivalent groebner bases of the polynomial equations were computed, finally, the real solutions number of the SHEPWM equations were discussed with the mechanical proving theory and algorithm of the semi-algebraic systems. The conclusion of there is only one solutions for the single phase SHEPWM inverter with less than 7 switching points in a quarter period and the theoretical maximum modulation ratio were derived for the first time. The experiments and simulations verify the correctness of these conclusions.

关键词： Inverters Switches Harmonic analysis Polynomials Mathematical model Modulation

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An Initialization Method based on The Core Clusters for Locality-weight Fuzzy C-Means Clustering 4th

An Initialization Method based on The Core Clusters for Loca...

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2013 IEEE 4th International Conference on Software Engineering and Service Science

作者： Lei Gu The Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University School of Computer Science and Technology Nanjing University of Posts and Telecommunication

ISBN: (纸本)9781467349970

The Locality-weight fuzzy c-means clustering method has been presented *** this approach can improve the clustering accuracies,it often gains the unstable clustering results because some random samples are employed for the initial *** this paper,an initialization method based on the core clusters is used for the locality-weight fuzzy c-means *** core clusters can be formed by constructing the σ-neighborhood graph and their centers are regarded as the initial centers of the locality-weight fuzzy c-means *** investigate the effectiveness of our approach,several experiments are done on three *** results show that our proposed method can improve the clustering performance compared to the previous locality-weight fuzzy c-means clustering.

关键词： the initialization clustering methods core clusters locality-weight fuzzy c-means neighborhood graph

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Vibration model based multi-path traffic allocation algorithm for wireless mesh networks

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Journal of Information and Computational Science 2013年第5期10卷 1253-1260页

作者： Yuan, Zhenxia Yu, Ruiguo Zhao, Mankun Du, Xiuping Lei, Ming Dong, Wenyong School of Computer Science and Technology Tianjin University Tianjin 300072 China School of International Education Tianjin University Tianjin 300072 China Tianjin Key Laboratory of Intelligence Computing and Novel Software Technology Tianjin University of Technology Tianjin 300191 China Key Laboratory of Computer Vision and System Ministry of Education Tianjin 300191 China Computer School Wuhan University Wuhan 430079 China

Mesh Networks (WMNs) is a promising network access technology. As WMNs' applications become more and more popular, the number of users grows quickly and the quality of service needs to be improved. When we try to analyze the load on different paths using the simplest multi-path routing algorithms we find that the load changes just like Simple Harmonic Motion, which inspires us to use physic model to analyze the traffic allocation problems. And then we design a new traffic allocation algorithm and the experiment shows that the algorithm can reduce the path delay variance. © 2013 Binary Information Press.

关键词： Quality of service

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Research on XML-based exchanging system between databases

Research on XML-based exchanging system between databases

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2012 International Conference on Engineering Materials, ICEM 2012

作者： Li, Wenjie Liu, Si Hu, Yu Tianjin Key Laboratory of Intelligence Computing and Novel Software Technology Tianjin University of Technology 300384 Tianjin China Key Laboratory of Computer Vision and System Ministry of Education Tianjin University of Technology 300384 Tianjin China School of Computer Science and Technology Tianjin University 300072 Tianjin China

ISBN: (纸本)9783037856130

In homogeneous or heterogeneous databases, the main direction of research on XML-based information interaction between databases is taking XML as middleware to realize the information exchange between data in the environment of small and medium-sized databases. Considering the insufficiency of the traditional text file-based information interaction method, the paper puts forward an XML-based method of information exchanging between databases, and the corresponding database exchanging system is developed. The utmost feature and advantage of the system is taking hibernate XML mapping table file for converting middleware to realize information interaction between databases. The experiment result shows that the system provides a certain reference value for data mining and data warehouse. © (2013) Trans Tech Publications, Switzerland.

关键词： Middleware

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A reconfigurable routing method for fault-tolerant mesh-based network on chip

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Journal of Information and Computational Science 2013年第1期10卷 157-165页

作者： Liu, Yanhua Ruan, Ying Lai, Zongsheng Sun, Ling Institute of Microelectronics Circuit and System East China Normal University Shanghai 200241 China Jiangsu Provincial Key Lab. of ASIC Design Nantong University Nantong 226019 China State Key Laboratory of Computer Architecture Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China

As the semiconductor industry advances to nano-technology points, Network on Chip (NoC) components are becoming vulnerable to errors during the system operation. Consequently, fault-tolerant techniques for NoC are needed to achieve high reliability. In this paper, we present a fault-tolerant routing method to tolerate faulty routers in a two-dimension (2D) mesh-based NoC. With this method, the system can have a multi-router fault-tolerant capability and the routing path can be dynamically reconfigured to support different situations caused by faulty routers in NoC. Fault-tolerance capability and system performance of the proposed method are evaluated through analysis and simulations. Theoretical analysis and simulation results show that the proposed method can enhance the reliability of system and offer considerable fault-tolerance capability. © 2013 by Binary Information Press.

关键词： Network-on-chip

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Using more initial centers for the seeding-based semi-supervised K-harmonic means clustering

Using more initial centers for the seeding-based semi-superv...

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2012 International Conference on Emerging Technologies for Information systems, computing, and Management, ICM 2012

作者： Gu, Lei Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai China School of Computer Science and Technology Nanjing University of Posts and Telecommunication Nanjing China

ISBN: (纸本)9781461470090

In the initialization of the traditional semi-supervised k-means, the mean of some labeled data belonging to one same class was regarded as one initial center and the number of the initial centers is equal to the number of clusters. However, this initialization method using a small amount of labeled data also called seeds which are not appropriate for the semi-supervised k-harmonic means clustering insensitive to the initial centers. In this paper, a novel semi-supervised k-harmonic means clustering is proposed. Some seeds with one same class are divided into several groups and the mean of all data is viewed as one initial center in every group. Therefore, the number of the initial centers is more than the number of clusters in the new method. To investigate the effectiveness of the approach, several experiments are done on three datasets. Experimental results show that the presented method can improve the clustering performance compared to other traditional semi-supervised clustering algorithms. © 2013 Springer Science+Business Media New York.

关键词： Harmonic analysis

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Predictive Control for Visual Servo Stabilization of Nonholonomic Mobile Robots

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自动化学报 2013年第8期39卷 1238-1245页

作者： CAO Zheng-Cai YIN Long-Jie FU Yi-Li LIU Tian-Long College of Information Science and Technology Beijing University of Chemical TechnologyBeijing 100029China Key Laboratory of Embedded System and Service Computing Ministry of EducationTongji UniversityShanghai 201804China State Key Laboratory of Robotics and Systems Harbin Institute of TechnologyHarbin 150080China

活动机器人获得了的 nonholonomic 的视觉伺服稳定广泛的注意。当前，这个问题的解决方案不管多么不认为可见性限制和致动器是限制，因此设计控制器是困难的在实际申请认识到令人满意的性能。在这份报纸，为一个活动机器人的视觉伺服稳... 详细信息

活动机器人获得了的 nonholonomic 的视觉伺服稳定广泛的注意。当前，这个问题的解决方案不管多么不认为可见性限制和致动器是限制，因此设计控制器是困难的在实际申请认识到令人满意的性能。在这份报纸，为一个活动机器人的视觉伺服稳定的一个预兆的控制器被介绍。第一，利用产生速度的命令的一个运动学的预兆的稳定控制器被介绍。然后，来临以便 asymptotically 做活动机器人的实际速度到需要的，一个动态预兆的控制器被设计。建议预兆的控制器能容易处理限制。最后，几模拟被执行，并且结果说明建议控制计划是有效的解决视觉伺服稳定问题。

关键词：非完整移动机器人稳定化控制器预测控制器视觉伺服生成速度运动预测稳定问题控制方案

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Berth-Crane allocation model and algorithm of container berths in the uncertain environment

Advances in Intelligent Systems and Computing

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Advances in Intelligent systems and computing 2013年 212卷 785-792页

作者： Liu, Jian-xin Du, Yu-yue Hong, Yong-fa Sun, Lin-lin College of Information Science Engineering Shandong University of Science and Technology Qingdao 266590 Shandong China The Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai 200092 China College of Civil Engineering and Architecture SUST Qingdao 266590 Shandong China

ISBN: (纸本)9783642375019

According to the randomness of the vessel's arrival time and handling time, the establishment of a randomly-oriented environment container berths-crane allocation model, the optimizing goal is to minimize the average ship-waiting time. Taking into account the complexity of the model solution, this paper offers the design of an improved genetic algorithm to reduce the searching space, and according to the characteristics of the optimal solution. With testing example to verify that the model can simulate decision-making environment of berths-crane allocation problem and reflect the decision-maker's attitude toward risks and preferences. The algorithm can gain a stable and satisfactory solution within the operating time. © Springer-Verlag Berlin Heidelberg 2013.

关键词： Genetic algorithms

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