作者机构：
[Zukerman, M] Univ Melbourne, Australian Res Council, Special Res Ctr Ultrabroadband informat Networks, Natl ICT Australia,EEE Dept, Parkville, Vic 3010, Australia.;Cent China Normal Univ, Dept Comp Sci, Wuhan 430079, Peoples R China.
通讯机构：
[Zukerman, M] U;Univ Melbourne, Australian Res Council, Special Res Ctr Ultrabroadband informat Networks, Natl ICT Australia,EEE Dept, Parkville, Vic 3010, Australia.
期刊：
Lecture Notes in Computer Science,2005年3399:991-1002 ISSN：0302-9743
通讯作者：
Xiong, NX
作者机构：
[Xiong, NX] Wuhan Univ, Comp Sch, Wuhan 430079, Peoples R China.;Cent China Normal Univ, Dept Comp Sci, Wuhan 430079, Peoples R China.;Hong Kong Polytech Univ, Dept Comp, Kowloon, Hong Kong, Peoples R China.;City Univ Hong Kong, SMIEEE, Dept Comp Sci, Kowloon, Hong Kong, Peoples R China.
期刊：
Lecture Notes in Computer Science,2005年3711:106-113 ISSN：0302-9743
通讯作者：
Liu, HY
作者机构：
[Liu, HY] Cent China Normal Univ, Dept Comp Sci, Wuhan 430079, Hubei, Peoples R China.;Wuhan Univ, Sch Business, Finance Dept, Wuhan 430072, Hubei, Peoples R China.
通讯机构：
[Liu, HY] C;Cent China Normal Univ, Dept Comp Sci, Wuhan 430079, Hubei, Peoples R China.
会议名称：
Entertainment Computing - ICEC 2005, 4th International Conference, Sanda, Japan, September 19-21, 2005, Proceedings
摘要：
An advanced content-based sports video browsing and retrieval system, SportsVBR, is proposed in this work. Its main features include event-based sports video browsing and keyword-based sports video retrieval. The paper first defines the basic structure of our SportsVBR system, and then introduces a novel approach that integrates multimodal analysis, such as visual streams analysis, speech recognition, speech signal processing and text extraction to realize event-based video clips selection. The experimental results for sports video of world cup football games indicate that multimodal analysis is effective for video browsing and retrieval by quickly browsing event-based video clips and inputting keywords according to a predefined sports vocabulary database. The system is proved to be helpful and effective for the overall understanding of the sports video content.
作者机构：
[姚娟; Zeng, Qingjiang] Dept. of Comp. Sci., Central China Normal Univ., Wuhan 430079, China;[赵尔敦] Huazhong Univ. of Sci. and Technol., Wuhan 430074, China
通讯机构：
Dept. of Comp. Sci., Central China Normal Univ., China
摘要：
The ever-increasing multicast data applications recently have aroused considerable interests in the design of congestion control scheme for multicast services. This kind of study is indeed important, especially to those multicast receivers with large propagation delays which mean the feedbacks arriving at the source node are somewhat outdated and harmful to control actions. A distributed self-tuning explicit rate algorithm is presented in this paper to overcome the vulnerability that suffers from the heterogeneous multicast receivers. It is suggested that congestion controllers be located at the source and the participating intermediate nodes to regulate the transmission rate. This network-assisted property is different from the traditional control scheme in that the router computes the appropriate transmission rate of itself and executes it rather than sends packets in best efforts. This active manner makes the control more responsive to the network status. The proposed self-tuning controller has essentially a proportional controller structure. The proportional gain is related to the extent that the router buffer occupancy deviates from the desired point. Simulation results show the efficiency of the proposed scheme in terms of fast response, high link utilization, and relatively stable buffer occupancy.
期刊：
Proceedings of the World Congress on Intelligent Control and Automation (WCICA),2004年2:1637-1641
通讯作者：
Dai, C.(C.Dai@lboro.ac.uk)
作者机构：
[Dai, C.; Yang, S.H.] Department of Computer Science, Loughborough University, Loughborough, Leicesshire LE11 3TU, United Kingdom;[Tan, Liansheng] Department of Computer Science, Central China Normal University, Wuhan, 430079, China
通讯机构：
Department of Computer Science, Loughborough University, United Kingdom
会议名称：
WCICA 2004 - Fifth World Congress on Intelligent Control and Automation, Conference Proceedings
会议时间：
June 15, 2004 - June 19, 2004
会议地点：
Hangzhou, China
会议主办单位：
(1) Department of Computer Science, Loughborough University, Loughborough, Leicesshire LE11 3TU, United Kingdom; (2) Department of Computer Science, Central China Normal University, Wuhan, 430079, China
摘要：
Monitoring and maintaining of control software becomes more and more important and difficult with the increase of control software in size and complexity. In this paper, an approach for control software fault detection is proposed, which is based on the monitoring of the discrepancies between the control outputs of the actual controller and the benchmark controller, a Linear Quadratic Gaussian (LQG) controller. The discrepancies are assumed to be Gaussian distribution with a stable mean under the normal situation. Faults in the actual controller are characterized by sudden jumps in the mean of the discrepancies. The fault detection is transferred into a jump point identification problem. A detector based on Generalized Likelihood Ratio (GLR) test is employed for the jump point identification. The proposed approach is applicable to general control software even it is only illustrated through a water heater case study with a simple PID controller.
作者机构：
[金聪; 彭嘉雄] Lab. for Image Processing, Inst. for Pattern Recognition, Huazhong Univ. of Sci. and Technol., Wuhan 430074, China;Lab. of Information Security, Chinese Acad. of Sciences, Beijing 100039, China;Dept. of Computer Science, Central China Normal Univ., Wuhan 430079, China
通讯机构：
Lab. for Image Processing, Inst. for Pattern Recognition, Huazhong Univ. of Sci. and Technol., China
期刊：
Journal of Global Optimization,2004年28(1):115-119 ISSN：0925-5001
通讯作者：
Du, HW
作者机构：
[Du, HW] Huazhong Normal Univ, Dept Comp Sci, Wuhan, Peoples R China.;City Univ Hong Kong, Dept Comp Sci, Kowloon Tong, Hong Kong, Peoples R China.;Univ Texas, Dept Comp Sci, Richardson, TX 75083 USA.
通讯机构：
[Du, HW] H;Huazhong Normal Univ, Dept Comp Sci, Wuhan, Peoples R China.
关键词：
Color;Real Function;Double Disk
摘要：
We study the problem of minimizing the number of colors for vertex-coloring of double disk graphs and in this note, show a polynomial-time 31-approximation for the problem, which improves an existing result.
作者机构：
[金聪; 彭嘉雄] State Key Laboratory of Education, Huazhong Univ. of Sci. and Technol., Min. Image Proc./Intelligent Contr., Wuhan 430074, China;[金聪] Department of Computer Science, Central China Normal University, Wuhan 430079, China
通讯机构：
[Jin, C.] S;State Key Laboratory of Education, Huazhong Univ. of Sci. and Technol., Min. Image Proc./Intelligent Contr., China
期刊：
Proceedings - The Fourth International Conference on Computer and Information Technology, CIT 2004,2004年:364-368
通讯作者：
Yang, Y
作者机构：
[Tan, LS; Yang, Y; Xiong, NX] Cent China Normal Univ, Dept Comp Sci, Hubei Wuhan 430079, Peoples R China.
通讯机构：
[Yang, Y] C;Cent China Normal Univ, Dept Comp Sci, Hubei Wuhan 430079, Peoples R China.
摘要：
With the rapid advances in Internet and Grid technique, an increasing number of applications will involve computing systems. These applications in turn create an increasing demand for efficient resource management, request handling policies and admission control. In this paper, we propose an efficient admission control algorithm to protect the critical resource of server and improve the performance of the computing system. Stability of CPU utilization is aimed to protect the server from overload and under-load. It is then beneficial to keep a satisfactory response time of requests, high throughput and less potential loss of service. We analyze the stability in detail and present a method for tuning control gains in order to guarantee the system stability. Finally, we perform simulations to evaluate the performance of the proposed algorithm. Simulation results demonstrate that the proposed algorithm stabilizes the utilization of CPU in the computing system if the control gains are appropriately chosen on the basis of system stability, it then achieves satisfactory performance.
作者机构：
[李蔚; 何军; 刘德明; 黄德修] Department of Optoelectronic Engineering, Huazhong University of Science and Technology;[李源] Department of Computer Science, Central China Normal University
通讯机构：
[Li, W.] D;Dept. of Optoelectron. Eng., Huazhong Univ. of Sci. and Technol., China
关键词：
Genetic algorithms;Optical networks
摘要：
In a wavelength routing optical network (WRON), the optimal allocation of wavelength converters (WCs) is very important to minimize the number of WCs, enhance the fiber utilization, reduce the blocking probability, etc.. In this paper, a novel simplified network model with shared WCs has been proposed. An effective algorithm for optimal allocation of shared WCs has been presented by using a revised Dijkstra algorithm and genetic algorithm (GA). The effectiveness of the revised algorithm was verified through the simulation on Nature and Science Foundation (NSF) net of USA. This revised algorithm can achieve blocking probability 36% less than the algorithm in previous work, and the calculating time of the minimum blocking probability can be reduced dramatically.
作者机构：
[黄德修; 刘德明; 何军; 李蔚; 杨春勇] Dept. of Optoelectron. Eng., Huazhong Univ. of Sci. and Technol., Wuhan 430074, China;[李源] Dept. of Comp. Sci., Central China Normal Univ., Wuhan 430070, China
通讯机构：
[Li, W.] D;Dept. of Optoelectron. Eng., Huazhong Univ. of Sci. and Technol., China
期刊：
Proceedings - The Fourth International Conference on Computer and Information Technology, CIT 2004,2004年:1159-1164
通讯作者：
Hu, P
作者机构：
[He, TT; Hu, P; Ji, DH; Wang, M] Cent China Normal Univ, Dept Comp Sci, Wuhan 430079, Peoples R China.
通讯机构：
[Hu, P] C;Cent China Normal Univ, Dept Comp Sci, Wuhan 430079, Peoples R China.
摘要：
Automatic Summarization is an important research issue in natural language processing. This paper presents a special summarization method to generate single-document summary with maximum topic completeness and minimum redundancy. It initially implements the semantic-class-based vector representations of various kinds of linguistic units in a document by means of HowNet (an existing ontology), which can improve the representation quality of traditional term-based vector space model in a certain degree. Then, by adopting K-means clustering algorithm as well as a novel clustering analysis algorithm, we can capture the number of different latent topic regions in a document adoptively. Finally, topic representative sentences are selected from each topic region to form the final summary. In order to evaluate the effectiveness of the proposed summarization method, a novel metric which is known as representation entropy is used for summarization redundancy evaluation. Preliminary experimental results show that the proposed method outperforms the conventional basic summarization method under the evaluation scheme when dealing with diverse genres of Chinese documents with free writing style and flexible topic distribution.
作者机构：
[Tan, LS; Chen, L; Yin, M] Cent China Normal Univ, Dept Comp Sci, Wuhan 430079, Peoples R China.
通讯机构：
[Tan, LS] C;Cent China Normal Univ, Dept Comp Sci, Wuhan 430079, Peoples R China.
会议名称：
International Conference on Communication Technology
会议时间：
APR 09-11, 2003
会议地点：
BEIJING, PEOPLES R CHINA
会议主办单位：
Cent China Normal Univ, Dept Comp Sci, Wuhan 430079, Peoples R China.
关键词：
ABR service;high-speed computer networks;congestion control;PID controller;performance evaluation
摘要：
In this paper, we present a novel control-theoretic explicit rate (ER) allocation algorithm for congestion control of available bit rate (ABR) service in high-speed computer communication networks. The proposed control uses a proportional-integrative-plus-derivative (PID) controller rather than the usually adopted proportional-plus-derivative (PD) controller. Based on a general traffic model of computer network and on system stability criterion, it is shown that under PID controller the source rates are regulated in such a manner that the congestion-controlled network is asymptotic stable in terms of both the buffer occupancy of the destination node and the user transmission rates, and the bandwidth fairness is achieved. The basic control theory approach for the algorithm is firstly presented, specifically z-transformation and Schur-Cohn stability test are used to achieve the stability. Steady state analysis is subsequently given to show how the max/min fairness is achieved in a natural way without additional computation. We then use simulations to compare the performance of the PID congestion control scheme with the PD control scheme under a variety of networking conditions and loads. Our simulation results show that certain PID scheme produces advantages over PD scheme, namely PID control scheme leads to less buffer occupancy, faster response of the buffer occupancy as well as of the controlled ABR rates, smaller steady overshoots of ABR traffic and better utilization of network links.
