张冰怡，学者主页-中国科技论文在线

张冰怡

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姓名：张冰怡
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计算机科学技术
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个人简介

Bingyi Zhang now is an associate professor in Department of Computer Science and Technology, Tianjin University, People’s Republic of China. He has been a post-doctor in College of Electronics and Information Engineering, Beijing Jiaotong University, Beijing, People’s Republic of China. He got his PhD degree, majoring in Computer Applications, from the Department of Computer Science, Nanjing University of Science and Technology, People’s Republic of China. He got his MS degree majoring in Engineering from Henan University of Science and Technology, Luoyang and a BE degree majoring in Engineering in Jiangsu University, Zhenjiang, People’s Republic of China. His current research interests include network traffic modeling embedded application system design.

Bingyi Zhang has set up a perfectly model to simulate the Internet traffic. This model has been proved and includes some special physics parameters. This model has also been tested and compared with other famous models through actual traffic. The comparing results denote our model is better than other models. The relative paper has been published in the Journal of Network and Computer Applications, Elsevier 29(1), 2006:1-10 and achieve the Top 25 of this journal. In addition, it is difficult to give the complex traffic a quantitative analysis. So Bingyi zhang set up an arithmetic to solve this problem and the relative paper has been published in WILEY International Journal of Communication Systems, 19(1),2006:53-65.

Personal Home Page:　http://cs.tju.edu.cn/faculties/byzhang/1/

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2008-04-10

【期刊论文】网络通信量模型的线性鉴别分析

张冰怡，边裕兰，张宏科，孙亚民

通信学报2005年11月第26卷第11期/Journal on Communications Vol.26, No.11, November. 2005，-0001，（）：

-1年11月30日

摘要

判断网络通信量模型与真实数据拟合度的常用方法是Hurst参数比较法、数据直方图比较法和自相关函数比较法。其中Hurst参数法计算结果不准确，不能给出正确判断，而后两者只能主观给出一个定性判断。基于线性鉴别分析原理，给出了一个拟合度判断算法。用该算法分析了不同差别程度的模型仿真数据和大量NS仿真数据，应用效果显著，与常用方法相比，能定量、准确地判断网络通信量模型的拟合度。

数据分组网，通信量模型，线性鉴别分析，分数Alpha平稳过程

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2008-04-10

【期刊论文】Fractional alpha stable network traffic model and its application in QoS routing

张冰怡， Bing-Yi Zhang， Ya-Min Sun

Journal of Network and Computer Applications 29 (2006) 1–10，-0001，（）：

-1年11月30日

摘要

It is not a simple and trivial work to set up an appropriate network traffic model. A fractional Alpha model is proposed in this paper and two proofs based on flow and session level, respectively, are given. Based on this model, the lower bound for the residual of the queueing distribution is deduced. Comparing the residual distribution function (RDF) based on our model with it based on other models, we find our formula matches the real RDF better. Based on this formula, we can predict the need for forwarding performance. Then a novel QoS routing algorithm based on this prediction is proposed. Last we demonstrate a simple example to denote how our algorithm can effectively improve the utility of bandwidth and amount of traffic and guarantee QoS.

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2008-04-10

【期刊论文】Linear discriminant analysis in network traffic modeling

张冰怡， Bing-Yi Zhang， Ya-Min Sun， Yu-Lan Bian， Hong-Ke Zhang

INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS 2006; 19:53–65 ，-0001，（）：

-1年11月30日

摘要

It is difficult to give an accurate judgement of whether the traffic model fit the actual traffic. The traditional method is to compare the Hurst parameter, data histogram and autocorrelation function. The method of comparing Hurst parameter cannot give exact results and judgement. The method of comparing data histogram and autocorrelation only gives a qualitative judgement. Based on linear discriminant analysis we proposed a novel arithmetic. Utilizing this arithmetic we analysed some sets of data with large and little differences. We also analysed some sets of data generated by network simulator. The analysis result is accurate. Comparing with traditional method, this arithmetic is useful and can conveniently give an accurate judgement for complex network traffic trace.

data packet network， network traffic modelling， linear discriminant analysis， fractional Alpha stable process

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2008-04-10

【期刊论文】分析网络通信量的一个新方法：PCA

张冰怡，，兰巨龙，边裕兰，孙亚民，李玉峰，张宏科

计算机工程2005年10月第31卷第19期/Computer Engineering Vol. 31, No. 19, October, 2005，-0001，（）：

-1年11月30日

摘要

分析网络通信量的传统方法是使用变尺度函数计算Hurst参数，其计算结果不准确，不能正确判断模型拟合度。文章使用主成分分析计算Hurst参数，判断通信量模型的拟合度，分析同一模型不同参数的差别不明显的数据，结果表明该方法新颖而有效。

网络通信量分析，主成分分析，变尺度统计函数，通信量模型

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2008-04-10

【期刊论文】基于分数Alpha模型的缓存计算方法

张冰怡，张宏科，边裕兰，张辉，

计算机工程2007年6月第33卷第12期/ Computer Engineering Vol. 33, No.12, June 2007，-0001，（）：

-1年11月30日

摘要

缓存大小计算是高性能路由器设计中一个必不可少的内容，常规缓存计算方法是基于Poisson通信量模型得到的，不符合网络通信量的实际特征，在使用中存在丢包率较高的问题。已提出的分数Alpha通信量模型能体现通信量的自相似性和非高斯特征，用于缓存溢出概率计算，能得到比其它网络模型更好的结果。基于该模型得到了一个缓存计算方法，在高速路由器转发引擎的缓存设计应用中得到了满意的结果，与常规方法相比更体现了实际通信量的变化规律，计算结果更准确。

路由器设计，缓存计算， Poisson模型，分数Alpha通信量模型