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IEEE International Conference on Communications Workshops, ICC

作者： Zhenzhe Sun Chengnian Long Mary Ann Weitnauer Shanghai Jiao Tong University Shanghai CN Dept. of Automation Key Lab. of System Control and Information Processing Ministry of Education School of Electronic and Computer Engineering Georgia Institute of Technology Atlanta Georgia

This paper describes a new method for how interfering MIMO links might transmit more effectively in a random access network. We assume perfect transmitter-side channel state information, zero-forcing pre-coding to guarantee no interference on links that have already won access, and zero-forcing receiver processing at the still-contending links to suppress interference from the links that have already won. We define an effectiveness metric, the Instantaneous Equivalent SNR Percentile (IESP), in which the Equivalent SNR is the SNR of a single-input-single-output (SISO) link that would have the same capacity of a MIMO link after its interference constraints have been met and the IESP is the percentile of the Equivalent SNR, assuming independent Rayleigh fading. We propose that fairness among heterogeneous contending links be realized by giving the shorter contention window to the link with the higher IESP based on its own distribution, enabling links with few antennas to compete with links that have many antennas. Through simulation of the sum capacity of the winning set of links, the proposed contention window design is shown to provide a higher sum capacity than contention based on equal-sized windows.

关键词： Signal to noise ratio Receivers MIMO Interference Vectors Transmitters Frequency modulation

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The system design of a node of P2P networks for intrusion detection

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Journal of Networks 2013年第8期8卷 1920-1927页

作者： Ding, Lei Yu, Fei Yang, Zhenghua Yue, Guangxue School of Information Science and Engineering Jishou University Jishou 416000 China Jiangsu Provincial Key Laboratory for Computer Information Processing Technology Soochow University Soochow 215006 China School of Mathematic and Computer Jiaxin University Jiaxin 314001 China

To improve the measuring accuracy of intrusion detection, a system design of a node for intrusion detection is proposed in this paper. First, the technology that applies the traditional intrusion detection method, such as anomaly detection and misuse detection, into P2P networks is presented. Next, to build the trust relationship among the nodes, and realize the cooperation mechanism of data detection, collection and response among the nodes of P2P networks, the corresponding solving plans, such as topological structure, trust model, information share and information fusion, are proposed in this paper. Then the concept of network telescope is presented to broaden the field of vision of malicious attacks and abnormal network packets in the propagation path. Finally, a system design of a node for intrusion detection using the honeypot technology is proposed in this paper. © 2013 ACADEMY PUBLISHER.

关键词： Intrusion detection

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A semi-informative aware approach using topic model for medical search

A semi-informative aware approach using topic model for medi...

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IEEE International Conference on Bioinformatics and Biomedicine (BIBM)

作者： Qinmin Vivian Hu Liang He Mingyao Li Jimmy Xiangji Huang E. Mark Haacke Shanghai Key Laboratory of Multidimensional Information Processing MR Research Facility Wayne State University Detroit MI USA Department of Computer Science & Technology East China Normal University Shanghai China Information Retrieval and Knowledge Management Research Lab York University Toronto Canada

We propose a semi-informative aware approach using the topic model on query expansion problem in the biomedicine domain. the demographics and disease information is applied to semi-structure the topic model as the “known” label, compared to the traditional latent topics in topic modelling. Then, we suggest to select three terms from the top ranked documents to expand the query, based on the assumption in the pseudo relevance feedback method that the top ranked results in the first retrieval around are relevant. After that, we conduct the experiments on the TREC medical records data sets with extensive analysis and discussions. Numerically, we achieve the improvements of 7.41% on MAP, 9.29% on Bpref and 5.60% on P@10 respectively over the strong baselines.

关键词： Indexes Diseases information retrieval Numerical models Biological system modeling Educational institutions Mathematical model

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Towards the scheduling of access requests in cloud storage

Towards the scheduling of access requests in cloud storage

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8th International Conference on computer Science and Education, ICCSE 2013

作者： Wu, Xian Qian, Peide School of Computer Science and Technology Computer Information Processing Technology Suzhou University Suzhou 215006 China Jiangsu Provincial Key Laboratory Computer Information Processing Technology Suzhou University Suzhou 215006 China School of Computer Science and Technology Suzhou University Suzhou 215006 China

ISBN: (纸本)9781467344623

In recent years, cloud computing has emerged as an enabling technology, in which virtual machine migration and dynamic resource allocation is one of the hot issues. During the migration of virtual machine, access requests from end users coming constantly. So how to schedule these requests to ensure the performance of cloud storage system is the key issue. In this paper, we focus on scheduling access requests to provide end users desirable data when virtual data nodes are migrating. In this process, we interested in the following performance in the system: the availability of data, energy consumption and cost. The contributions of this paper are: 1) analyze the open issues of scheduling in cloud storage;2) present the environment of scheduling access requests in cloud storage and discuss metrics which affect the scheduler;3) define the formal concepts about this problem and give the main steps of scheduling algorithm. The main innovation of this paper is fully taken into account data node's mobility in cloud storage. So we could establish the connection between resource availability and system availability. The results of this paper can be used in scheduling and resource management in cloud storage system to provide the mass storage of streaming media in cloud and its continuous access. © 2013 IEEE.

关键词： Scheduling

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Survey of DCA for abnormal detection

Journal of Software

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Journal of Software 2013年第8期8卷 2087-2094页

作者： Ding, Lei Yu, Fei Yang, Zhenghua School of Information Science and Engineering Jishou University Jishou 416000 China Jiangsu Provincial Key Laboratory for Computer Information Processing Technology Soochow University Soochow 215006 China School of Information Science and Engineering Jishou University Jishou 416000 China

As a latest immune algorithm, dendritic cell algorithm (DCA) has been successfully applied into the abnormal detection. First, this paper reviewed the research progress of DCA from the following aspects: signal extraction technology, DCA signal processing technology, the decision method for load anomaly judgment, and the application research of DCA. Next, the corresponding solving thoughts for the main problems existing in the DCA were proposed in this paper. Finally, the future research trends of DCA were presented in this paper. © 2013 ACADEMY PUBLISHER.

关键词： Signal processing

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Coverage Enhancement Strategy Based on Novel Perception and Co-evolution for Multimedia Sensor Networks

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电子学报(英文版) 2013年第1期22卷 135-140页

作者： XIAO Fu WANG Jing SUN Lijuan WANG Ruchuan GUO Jian College of Computer Nanjing University of Posts and Telecommunications Nanjing 210003 China Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Nanjing 210003 China Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Nanjing 210003 China Provincial Key Laboratory for Computer Information Processing Technology Soochow University Suzhou 215006 China

Coverage enhancement is one of the hot research topics in wireless multimedia sensor net- works. A novel Coverage-enhancing algorithm based on three-dimensional Directional perception and co-evolution (DPCCA) is proposed in multimedia sensor networks on the basis of the model whose pitch angle and deviation angle can be adjusted. Based on the proposed elliptical cone sensing model, we can derive the coverage area of the node and calculate the optimal pitch angle according the information of monitoring area and the nodes, and then the deviation angle is optimized based on co-evolution al- gorithm, which eliminate the overlapped and blind sensing area effectively. A set of simulations demonstrate the ef- fectiveness of our algorithm in coverage ratio.

关键词：无线多媒体传感器网络网络覆盖协同进化感知增强算法网络工程测量模型

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Resource allocation for chunk-based multi-carrier cognitive radio networks

Resource allocation for chunk-based multi-carrier cognitive ...

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International Symposium on Wireless Personal Multimedia Communications (WPMC)

作者： Ding Xu Qun Li Xiao-chuan Sun Wireless Communication Key Lab of Jiangsu Province Nanjing University of Posts and Telecommunications Nanjing China School of Computer Science & Technology Nanjing University of Posts and Telecommunications Nanjing China College of Information Engineering Hebei United University Tangshan China

ISBN: (纸本)9781479964123

In this paper, a downlink multi-carrier cognitive radio (CR) network is considered. The CR network consists of one cognitive base station (CBS) and a set of secondary users (SUs) sharing the same spectrum with the primary user (PU). Chunk-based resource allocation is adopted where subcarriers are grouped into chunks for allocation to the SUs. The problem of chunk-based resource allocation under the interference power constraint and the transmit power constraint is investigated. The objective is to maximize the sum rate of the SUs. For this, based on Lagrange dual method, a near-optimal joint chunk and power allocation scheme is proposed. The complexity of the optimal scheme is exponential in the number of chunks, while the complexity of the proposed scheme is reduced significantly to only linear in the number of chunks, and at the same time, it is shown that the proposed scheme achieves almost the same performance that can be achieved by the optimal scheme. The impacts of the interference power constraint, the transmit power constraint, number of subcarriers within the chunk and the channel coherence bandwidth on the performance of the proposed scheme are investigated. Particularly, it is shown that increasing the channel coherence bandwidth does not always lead to improvement of the SU performance.

关键词： Resource management Interference Complexity theory Wireless communication Bandwidth Multimedia communication Coherence

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Mining approximate keys based on reasoning from XML data

Mining approximate keys based on reasoning from XML data

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17th Pacific-Asia Conference on Knowledge Discovery and Data Mining, PAKDD 2013

作者： Yijun, Liu Feiyue, Ye Sheng, He School of Computer Engineering Jiangsu University of Technology Changzhou Jiangsu 213001 China Key Laboratory of Cloud Computing and Intelligent Information Processing of Changzhou City Changzhou Jiangsu 213001 China

ISBN: (纸本)9783642403187

keys are very important for data management. Due to the hierarchical and flexible structure of XML, mining keys from XML data is a more complex and difficult task than from relational databases. In this paper, we study mining approximate keys from XML data, and define the support and confidence of a key expression based on the number of null values on key paths. In the mining process, inference rules are used to derive new keys. Through the two-phase reasoning, a target set of approximate keys and its reduced set are obtained. Our research conducted experiments over ten benchmark XML datasets from XMark and four files in the UW XML Repository. The results show that the approach is feasible and efficient, with which effective keys in various XML data can be discovered. © Springer-Verlag 2013.

关键词： Data mining

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A feedback linearization current control for shunt active power filter using sliding mode controller

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ICIC Express Letters 2013年第9期7卷 2539-2544页

作者： Fei, Juntao Li, Tianhua Jiangsu Key Lab. of Power Transmission and Distribution Equipment Technology College of Computer and Information Hohai University No. 200 Jinling North Road Changzhou 213022 China

In this paper, a novel feedback linearization sliding mode controlled parallel active power filter with indirect current control approach is presented in the three-phase three-wire grid. The feedback linearization indirect current controlled method is used to implement the DC side voltage regulation while a novel integral sliding mode controller is applied to reduce the total harmonic distortion of supply current. Since traditional unit synchronous sinusoidal signal calculating methods are not applicable when supply voltage contains harmonic, a novel unit synchronous sinusoidal signal computing method based on synchronous frame transforming theory is presented to overcome this disadvantage. Simulation results verify that the DC side voltage is well stable at the given value and responds fast to the external disturbance. Comparison is also made to show the advantages of the novel unit sinusoidal signal calculating method and super harmonic treating property of the designed active power filter. © 2013 ICIC International.

关键词： Sliding mode control

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Overlapping Community Extraction: A Link Hypergraph Partitioning Based Method

Overlapping Community Extraction: A Link Hypergraph Partitio...

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IEEE International Conference on Services Computing (SCC)

作者： Haicheng Tao Zhiang Wu Jin Shi Jie Cao Xiaofeng Yu College of Computer Sci. and Eng. Nanjing University of Science and Technology China Jiangsu Provincial Key Lab. of E-Business Nanjing University of Finance and Economics China School of Information Management Nanjing University China School of Business Nanjing University China

Real-world networks often contain communities with pervasive overlaps such that nodes simultaneously belong to several groups. Community extraction, emerging in recent years, is considered to be a promising solution for finding meaningful communities from social networks. In this paper, we explore overlapping community extraction from a link partitioning perspective. First, we define the local link structure composed of a set of closely interrelated links, by extending the similarity of link-pairs to that of a group of links. Second, based upon our prior work, we transform the problem of mining local link structures into a pattern mining problem, and thus present an efficient mining algorithm. Third, we propose to use the hypergraph to assemble all local link structures, and employ hMETIS for hypergraph partitioning. Finally, based on extracted link communities, we restore the membership of nodes in the original graph owing to its links. Experimental results on various real-life social networks validate the effectiveness of the proposed method.

关键词： Communities Educational institutions Google Proteins Itemsets Partitioning algorithms Social network services

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