李克秋
主要研究领域包括计算机网络与安全,Web技术,多媒体应用,移动代理技术以及网格计算等。
个性化签名
- 姓名:李克秋
- 目前身份:
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学术头衔:
博士生导师, 教育部“新世纪优秀人才支持计划”入选者
- 职称:-
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学科领域:
计算机科学技术
- 研究兴趣:主要研究领域包括计算机网络与安全,Web技术,多媒体应用,移动代理技术以及网格计算等。
李克秋,学历:博士(2002.10–2005.9): 日本北陆先端科学技术大学院大学情报科学研究科。硕士(1994.9-1997.4): 大连理工大学应用数学系。本科(1990.9-1994.7): 大连理工大学应用数学系。工作经历: 博士生导师(2007.7–): 大连理工大学计算机科学与工程系。教授(2007.3–): 大连理工大学计算机科学与工程系。研究员(2005.10-): 日本东京大学先端科学技术研究中心。讲师(2001.4-2002.9): 大连理工大学计算机科学与工程系。主任(1998.12-2001.3): 大连电子研究所计算机应用技术开发中心。工程师(1997.5-2001.3): 大连电子研究所计算机应用技术开发中心。
研究领域:主要研究领域包括计算机网络与安全,Web技术,多媒体应用,移动代理技术以及网格计算等。
科研成果及所受奖励:近五年来已在各种国际学术期刊、学术会议和书的章节(Book Chapter)上发表学术论文40多篇(SCI收录13篇,EI收录22篇,ISTP收录17篇),其中包括在IEEE TPDS, ACM TOIT,ACM TOMCCAP等国际著名杂志上以第一作者身份发表学术论文10余篇,研究成果得到同行专家的一致好评。主持日本学术振兴会科研奖励项目一项,参与日本学术振兴会和文部科学省科研项目各一项,主持若干项国际交流援助基金项目。获得日本学术振兴会外国人特别研究员称号,ICCNMC 2005国际会议优秀论文奖,日本北陆先端科学技术大学院大学优秀博士毕业生以及日本文部科学省国费奖学金。应邀在国际会议或大学做特邀报告3次。目前担任4个国际学术杂志的(客座)编委以及10余个国际会议的组织/程序/出版委员会主席或委员。
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主页访问
1508
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关注数
0
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成果阅读
274
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成果数
6
【期刊论文】An optimal solution for caching multimedia objects in transcoding proxies
李克秋, Wenyu Qu a, b, Keqiu Li c, *, Masaru Kitsuregawa b, Takashi Nanya d
Computer Communications 30(2007)1802-1810,-0001,():
-1年11月30日
As audio and video applications have proliferated on the Internet, caching multimedia objects in transcoding proxies has become an important technology for adapting the same multimedia object to meet diverse needs of various mobile appliances. In this paper, the problem of caching multimedia objects in transcoding proxies, i.e., determining the proper versions of the same multimedia object to be cached at selective nodes in a network such that the specified objective is achieved, is addressed. First, a novel model, which is formulated as an optimization problem by combining both transcoding cost and transmission cost in a cooperative way, is presented. Second, an optimal solution is derived for computing the optimal locations, which is also extended to solve the problem of optimally deciding the locations for placing a fixed number of versions of the same multimedia object in a network since caching more objects will generate great overhead as well. Finally, the performance of the proposed model is evaluated on different performance metrics through extensive simulation experiments.
Transcoding, Proxy caching, Multimedia object, Dynamic programming, Optimization problem, World Wide Web
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【期刊论文】Multimedia Object Placement for Transparent Data Replication
李克秋, Keqiu Li, Hong Shen, Francis Y.L. Chin, and Weishi Zhang
IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS, VOL. 18, NO. 2, FEBRUARY 2007,-0001,():
-1年11月30日
Transparent data replication is a promising technique for improving the system performance of a large distributed network. Transcoding is an important technology which adapts the same multimedia object to diverse mobile appliances; thus, users' requests for a specified version of a multimedia object could be served by a more detailed version cached according to transcoding. Therefore, it is articularly of theoretical and practical necessity to determine the proper version to be cached at each node such that the specified objective is achieved. In this paper, we address the problem of multimedia object placement for transparent data replication. The performance objective is to inimize the total access cost by considering both transmission cost and transcoding cost. We present optimal solutions for different cases for this problem. The performance of the proposed solutions is evaluated with a set of carefully designed simulation experiments for various performance metrics ver a wide range of system parameters. The simulation results show that our solution consistently and significantly outperforms comparison solutions in terms of all the performance metrics considered.
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【期刊论文】Optimal Methods for Coordinated Enroute Web Caching for Tree Networks
李克秋, KEQIU LI, HONG SHEN, FRANCIS Y. L. CHIN AND SI QING ZHENG
,-0001,():
-1年11月30日
Web caching is an important technology for improving the scalability of Web services. One of the key problems in coordinated enroute Web caching is to compute the locations for storing copies of an object among the enroute caches so that some specified objectives are achieved. In this article, we address this problem for tree networks, and formulate it as a maximization problem. We consider this problem for both unconstrained and constrained cases. The constrained case includes constraints on the cost gain per node and on the number of object copies to be placed. We present dynamic programming-based solutions to this problem for different cases and theoretically show that the solutions are either optimal or convergent to optimal solutions. We derive efficient algorithms that produce these solutions. Based on our mathematical model, we also present a solution to coordinated enroute Web caching for autonomous systems as a natural extension of the solution for tree networks. We implement our algorithms and evaluate our model on different performance metrics through extensive simulation experiments. The implementation results show
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【期刊论文】Multimedia Object Placement for Hybrid Transparent Data Replication∗
李克秋, Keqiu Li, Hong Shen, , Francis Y. L. Chin, and Liusheng Huang
,-0001,():
-1年11月30日
In this paper, we address present an optimal solution for the problem of multimedia object placement for hybrid transparent data replication. The performance objective is to minimize the total access cost by considering both transmission cost and transcoding cost. The performance of the proposed solution is evaluated with a set of carefully designed simulation experiments for various performance metrics over a wide range of system parameters. The simulation results show that our solution consistently and significantly outperforms comparison solutions in terms of all the performance metrics considered.
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【期刊论文】Cooperative Determination on Cache Replacement Candidates for Transcoding Proxy Caching★
李克秋, Keqiu Li, Hong Shen, , and Francis Y.L. Chin
,-0001,():
-1年11月30日
Transcoding proxy caching is an important technology for improving the services over Internet, especially in the environment of mobile computing systems. In this paper, we address cooperative determination on cache replacement candidates for transcoding proxies. An original model which determines cache replacement candidates on all candidate nodes in a coordinated fashion with the objective of minimizing the total cost loss is proposed. We formulate this problem as an optimization problem and present a low-cost optimal solution for deciding cache replacement candidates.
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30浏览
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【期刊论文】Coordinated En-Route Transcoding Caching for Tree Networks
李克秋, Keqiu Li and Hong Shen
,-0001,():
-1年11月30日
As transcoding caching is attracting an increasing amount of attention, it is important and necessary to find methods to distribute multiple versions of the same media object in the Internet. In this paper, we first present a mathematical model for the problem of optimally determining the locations in which to place multiple versions of the same media object in tree networks such that the specified objective is achieved. This problem is formulated as an optimization problem. Second, we propose a low-cost dynamic programming-based solution for solving this problem, by which the optimal locations are obtained. Finally, we evaluate our model on different performance metrics through extensive simulation experiments and compare the results of our model with those of existing models that consider transcoding caching either on a path or at individual nodes only.
Transcoding caching,, Internet,, tree network,, dynamic programming,, optimization problem.,
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