李泉林
研究兴趣涉及计算机网络、网络安全、RFID技术与应用、服务运作管理、物流与供应链、金融与保险、排队论、可靠性、决策分析、博弈论等。
个性化签名
- 姓名:李泉林
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学术头衔:
博士生导师
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学科领域:
管理理论
- 研究兴趣:研究兴趣涉及计算机网络、网络安全、RFID技术与应用、服务运作管理、物流与供应链、金融与保险、排队论、可靠性、决策分析、博弈论等。
李泉林,博士、副教授,河北省蔚县人。1998年在中国科学院应用数学研究所获得运筹学与控制论方向的博士学位。1998年1月到1999年7月在中国科学院自动化研究所从事博士后研究工作;1999年7月到2001年3月为中国科学院自动化研究所模式识别国家重点实验室副研究员;从2003年12月到现在为清华大学工业工程系副教授。从1999年9月到2004年12月,他分别在加拿大Winnipeg大学、Carleton大学、香港科技大学和澳门大学等进行了访问与合作研究。
李泉林博士的研究兴趣涉及计算机网络、网络安全、RFID技术与应用、服务运作管理、物流与供应链、金融与保险、排队论、可靠性、决策分析、博弈论等等,在随机模型的算法领域有一定的基础性学术贡献,已经在国际一流的学术刊物发表了三十余篇论文。李泉林博士是对外经济贸易大学和燕山大学的兼职教授,中国运筹学会可靠性专业分会的副理事长;他为1999年中国科学院十佳优秀博士后、2004年获得教育部优秀人才、2005年获得教育部自然科学一等奖。
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996
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成果数
20
【期刊论文】RELIABILITY APPROXIMATION OF A MARKOV QUEUEING SYSTEM WITH SERVER BREAKDOWN AND REPAIR
李泉林, QUAN-LIN LI, DE-JU XU and JINHUA CAO
Microelectron. Reliab., Vol. 37, No.8, pp. 1203-1212, 1997,-0001,():
-1年11月30日
This paper considers the reliability approximation of the queueing system PH/PH/1 with server breakdown and repair, where the life time of the server has the exponential distribution, and its repair time has the phase type distribution. First, we obtain the steady availability and steady failure frequency of the server. Then, we get the reliability function of the server, its probability density function and its Laplace-Stiltjes transform, which also gives an effective approximation of the reliability function of the server, where the error of the approximation can be easily bounded and is uniform in t. Finally, we discuss a special case and we can show that the reliability approximation has a wider application to various Markovian queueing systems with a repairable server.
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【期刊论文】Symmetric PH and EP Distributions and Their Applications to the Probability Hough Transform
李泉林, QUANLIN LI, GUANGHUI WANG, YUAN ZHOU
Computers and Mathematics with Applications 47 (2004) 823-844,-0001,():
-1年11月30日
this paper, we first introduce a symmetric phase type (PH) distribution, and then propose a symmetric exponential-polynomial type (EP) distribution based on the symmetric PH distribution. The class of symmetric EP distributions is illustrated to be so large that an arbitrary symmetric probability density function in L2 (-∞, +∞), which is the space of square integrable functions on the real line, can be approximated in (-∞, +∞) by a sequence of symmetric EP probability density functions. We prove this result by means of a constructive approach based on two orthogonal decompositions: Laguerre spectrum decomposition and Hermite spectrum decomposition. We also provide a moment-based approach for simply determining a symmetric EP probability density function to approximatively express a symmetric random variable under which some moments of the symmetric random variable are given. We further propose multidimensional symmetric PH and EP distributions and provide their useful structures and properties. Finally, we apply the symmetric PH and EP distributions to study the probability Hough transform.
PH distribution,, Symmetric PH distribution,, Symmetric EP distribution,, Orthogohal basis,, Laguerre polynomial,, Computer vision,, Pattern recognition,, Image analysis,, The probability Hough transform.,
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【期刊论文】相依修理的可修排队系统MAP/PH(M/PH)/2*
李泉林, 曹晋华
系统科学与数学,2001,20(1):79~86,-0001,():
-1年11月30日
系统地研究了两个不同并行服务台的可修排队系统MAP/PH(M/PH)/2,其中两个不同的服务台拥有一个修理工,若其中一台处于修理状态,则另一台失效后就处于待修状态,利用拟生灭过程理论,我们首先讨论了两个服务台的广义服务时间的相依性,然后给出了系统的稳态可用度和稳态故障度,最后得到了系统首次失效前的时间分布及其均值。
多台排队系统,, 可修排队系统,, 位相型分布,, 马氏到达过程,, 拟生灭过程.,
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【期刊论文】A BMAP/G/1 Retrial Queue with a Server Subject to Breakdowns and Repairs
李泉林, Quan-Lin Li, , Yu Ying and Yiqiang Q. Zhao
,-0001,():
-1年11月30日
In this paper, we consider a BMAP/G/1 retrial queue with a server subject to breakdowns and repairs, where the life time of the server is exponential and the repair time is general. We use the supplementary variable method, which combines with the matrix-analytic method and the censoring technique, to study the system. We apply the RG-factorization of a level-dependent continuous-time Markov chain of M/G/1 type to provide the stationary performance measures of the system, for example, the stationary availability, failure frequency and queue length. Furthermore, we use the RG-factorization of a level-dependent Markov renewal process of M/G/1 type to express the Laplace transform of the distribution of a first passage time such as the reliability function and the busy period.
Retrial queues,, batch Markov arrival processes (, BMAP), ,, Markov chains of M/, G/, 1 type,, Markov renewal processes of M/, G/, 1 type,, supplementary variable method,, matrix-analytic method,, censoring technique,, RG-factorization,, re-liability.,
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121浏览
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引用
李泉林, 周渊
计算机学报,2002,25(3):238~246,-0001,():
-1年11月30日
该文研究了基于有限个数据点的随机Hough变换的概率模型。在这个模型中,主要讨论了在随机Hough变换的基本算法中起相当关键作用的两个量:累加器数组的控制阈值以及从图像中提取全部基元所需随机抽样的总次数这两个量对随机Hough变换的算法设计及其终止规则是相当有用的。该文的主要结果包括两部分:其一是对累加器数组引入了多项分布,系统地研究了累加器数组的概率结构及其相互关系。同时也计算了提取全部基元所需的随机抽样总次数的分布、均值和方差。另者是基于不断的随机抽样而使得累加器数组的随机变化作者引入了多维纯生过程,证明了提取全部基元所需随机抽样的总次数服从离散的PH分布,从而它的各阶矩都可用简洁的矩阵形式统一地表出。针对于图像的固有因素,作者也讨论了基元的平稳提取概率。该文的结果为随机Hough变换的进一步研究和应用提供了较为严格的理论依据。
随机Hough变换,, 计算机视觉,, 几何基元,, 多项分布,, 马氏链,, PH分布
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53浏览
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【期刊论文】ANALYSIS OF A TWO-STAGE CYCLIC QUEUE WITIt STATE-DEPENDENT VACATION POLICY
李泉林, ZHU YIJUN, LI QUANLIN
Optimizaiotn. 1996. Vol.36, pp. 75-91,-0001,():
-1年11月30日
This paper refers to some closed two-stage queueing systems with state-dependent vacation policy. By means of the markovian renewal process and Ihe stochastic decomposition formulas of the quantities in equilibrium for M/G/I vacation models. we derive both stationary distributions of tbe queue length and the cyclic time for the closed stale-dependent vacation model We try to solve the problems of closed sustems by using the known results of the related opened Models, and for the purpose give an example in
State dependent vacation,, markotion renewal theory,, finite waiting room., closed queue-ing system,, stochastic decopmpositon cyclic time
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【期刊论文】A RG-FACTORIZATION APPROACH FOR A BMAP/M/1 GENERALIZED PROCESSOR-SHARING QUEUE
李泉林, Quan-Lin Li, Zhaotong Lian, Liming Liu
Stochastic Models, 21 (2-3): 1-24, 2005,-0001,():
-1年11月30日
In theis paper, we study a BMAP/M/1 generalized processor-sharing queue, We propose a RG-factorization approach which can be applied to a wider class ofMarkovian block-structured processor-sharing queues We obtain the expressions for bothe the distribution of the stationary queue length and the Laplace transform of the sojourn time distribution From these two expressions we develop an algorithm to compute the mean and variance of the sojourn time approximately.
Batch Markovian arrival process (, BMAP), , Generalized processor-sharing, Markov chain of M/, G/, 1,, Processor-sharing queue,, Sojourn time.,
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【期刊论文】Reliability Analysis of the Retrial Queue with Server Breakdowns and Repairs*
李泉林, JINTING WANG** and JINHUA CAO, QUANLIN LI
Queueing Systems 38, 363-380, 2001,-0001,():
-1年11月30日
Retrial queues have been widely used to model many problems arising in telephone switching systems, telecommunication networks, computer networks and computer systems, etc. It is of basic importance to study reliability of retrial queues with server breakdowns and repairs because of limited ability of repairs and heavy influence of the breakdowns on the performance measure of the system. However, so far the repairable retrial queues are analyzed only by queueing theory. In this paper we give a detailed analysis for reliability of retrial queues. By using the supplementary variables method, we obtain the explicit expressions of some main reliability indexes such as the availability, failure frequency and reliability function of the server. In addition, some special queues, for instance, the repairable M/G/1 queue and repairable retrial queue can be derived from our results. These results may be generalized to the repairable multi-server retrial models.
reliability,, retrial queues,, supplementary variable method
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李泉林, 李泉林), ), 周渊), 赵一强)
计算机学报,2001,24(5):502~508,-0001,():
-1年11月30日
该文从概率的角度提出了两类新的滤波器:对称位相型滤波器和对称梯阶滤波器;证明了对任意给定的非负对称滤波器可用这两类滤波器的序列在(-∞,+∞)内一致逼近;这种序列有着统一的结构形式:对于L(x),文中给出了选择L(x)一些最优准则的解析表达式从而表明L(x)既具有一般性,又易进行解析处理和数值计算,对于已有文献中相关于对称指数滤波器的两类不同形式,例如Li等[6]和Ma等[9],该文从理论上进一步刻画了它们的内在一致性。
计算机视觉,, 边缘检测,, 滤波器,, 最优准则
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李泉林, Quan-Lin Li, * and Jinhua Cao
STIOCHASTIC MODELS Vol.20. No.3. PP. 299-340. 2004,-0001,():
-1年11月30日
In this paper, we provide UL-type and LU-type RG-factorizations for an irreducible continuous-time level-dependent quasi-birth-and-death (QBD) process with either finitely-many levels or infinitely-many levels and then apply the RG-factorizations to solve a class of linear QBD-equations which is always crucial for analyzing a stochastic model described as a QBD process Based on the results obtained for the linear QBD-equations we analyze up-, down-and return-integral functinals We explicityly express the Laplace transforms of the conditional distributions of the three types of stochastic integral functionals and their conditional moments.
Level-dependent QBD process, R-measure, G-measure, RG-factorization, Linear QBD-equation, Stochastic integral functional.,
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