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Risk prediction model based on improved AdaBoost method for cloud users

Open Cybernetics and Systemics Journal 2015年第1期9卷 44-49页

作者： Zhang, Lin Rao, Kaili Wang, Ruchuan Jia, Yishang College of Computer Nanjing University of Posts and Telecommunications Nanjing210003 China Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks NanjingJiangsu Province210003 China Key Lab of Broadband Wireless Communication and Sensor Network Technology Nangjing University of Posts and Telecommunications Ministry of Education Jiangsu Province Nangjing210003 China

Considering the problem how to protect the cloud services from being destroyed by cloud users, the riskprediction model based on improved AdaBoost method is proposed. The risk prediction is regarded as two-class classification problem, and the risk of new cloud users could be predicted by the attributes of historical cloud users. In order to improve the result of predicted, AdaBoost method is adopted in this paper. The error rate of the last training is used to adjust the sample distribution of the next training, which can make the next training have stronger ability of identification for the error-classified samples. At the same time the weight of each weak classifier is set. After all, the strong classifier is generated by combined the weak classifiers through voting, which can improve the overall result of classification. Considering the wrongly-predicted cost, AdaBoost method is improved. The method of cost-sensitive is added into the model in order to minimal the misclassified-cost. Experiments show that the cost-sensitive AdaBoost method has better classification result than the traditional ones and it can predict the risk of the new cloud user effectively and protect the security of the cloud services. © Zhang et al.

关键词： Adaptive boosting

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Arbitrary Partially Entangled Three-Electron W State Concentration with Controlled-Not Gates

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Chinese Physics Letters 2014年第5期31卷 9-12页

作者：盛宇波冯兆峯欧阳阳屈长城周澜 Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Nanjing 210003 College of Mathematics and Physics Nanjing University of Posts and Telecommunications Nanjing 210003

We describe an efficient entanglement concentration protocol （ECP） for an arbitrary partially entangled threeelectron W state. We show that with the help of two ancillary single electrons, the concentration task can be well completed. This ECP has several advantages： Firstly, we only require one pair of partially entangled states. Secondly, only two single electrons are used during the whole protocol. Thirdly, we do not require all the parties to participate in the whole process, and only two parties are needed to perform the operation. Fourthly, the protocol can 5e repeated to obtain a high success probability. This ECP may be useful in current quantum computation and quantum communication.

关键词： QUANTUM entanglement ELECTRONS QUANTUM computing QUANTUM communication NONLINEAR theories

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International Journal of Internet Manufacturing and Services 2014年第4期3卷 341-357页

作者： Win, Nwe Nwe Htay Jianmin, Bao Gang, Cui Harbin Institute of Technology Harbin150001 China Myanmar Key Lab of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Nanjing210003 China

This paper presents an efficient service similarity matchmaking method that considers complex QoS structures and attributes because sole consideration of QoS constraint becomes insufficient to handle sophisticated concepts described in service documents. To overcome the shortcoming of semantic exploitation in traditional matchmaking mechanisms, we propose a novel similarity matchmaking method that compares the equivalences between service advertisements and requirements based on three essential criteria called structure, attribute and constraint similarity. The aim is to reveal the complicated QoS semantic concepts embedded in QoS-based service documents and exploit them in matchmaking. The similarity score obtained from evaluation of each similarity criteria is also calculated and a service collection set with the highest similarity scores is provided to the user as the result. The simulation and experiment results prove that our matchmaking method surpasses the other service matchmaking and discovery techniques. Copyright © 2014 Inderscience Enterprises Ltd.

关键词： Semantics

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R-PMD: robust passive motion detection using PHY information with MIMO

R-PMD: robust passive motion detection using PHY information...

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IEEE International Conference on Performance, Computing and communications (IPCCC)

作者： Hai Zhu Fu Xiao Lijuan Sun xiaohui Xie Panlong Yang Ruchuan Wang College of Computer Nanjing University of Posts and Telecommunications China Key Lab of Broadband Wireless Communication and Sensor Network Technology of Ministry of Education China College of Communications Engineering PLA University of Science and Technology China

Robust Device-free passive (Dfp) detection is an essential primitive for a broad range of applications such as intrusion detection and smart space. Most recent works focus on finer-grained Channel State Information (CSI), instead of the variable Received Signal Strength (RSS). However, existing solutions have some limitations, being feasible only in the line of sight (LOS) or for more than one targeted entities. Moreover, space diversity supported by the MIMO systems hasn't been fully investigated. Motivated by this observation, we propose a novel scheme for Robust Passive Motion Detection (R-PMD). In our scheme, the variance of CSI amplitude feature is extracted as a new metric and the earth mover's distance (EMD) is utilized to determine the detection results. Besides, CSIs across multiantennas are further exploited to improve the detection precision and robustness. We prototype R-PMD on commercial WiFi devices and evaluate it in a typical indoor scenario. Experiment results show R-PMD can achieve great performance in terms of sensitivity and robustness.

关键词： Feature extraction MIMO Robustness wireless communication Legged locomotion Receiving antennas Measurement

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Consequent entanglement concentration of a less-entangled electronic cluster state with controlled-not gates

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Chinese Physics B 2014年第5期23卷 91-95页

作者：周澜 College of Mathematics & Physics Nanjing University of Posts and Telecommunications Key Laboratory of Broadband Wireless Communication and Sensor Network Technology of the Ministry of Education Nanjing University of Posts and Telecommunications

We present a highly efficient entanglement concentration protocol （ECP） for a four-electron system in a less-entangled cluster state. In this ECP, we only require one pair of less-entangled electron cluster states and one ancillary electron to complete the task. With the help of the controlled-not （CNOT） gate, the concentrated maximally entangled state can be retained for further application with some success probability. On the other hand, the discarded items can be reused to obtain a high success probability. All the features make this ECP useful in the current quantum information field.

关键词： quantum communication entanglement entanglement concentration

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Semantic QoS Ontology and Semantic Service Ranking Approach for IoT services

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Journal of Harbin Institute of technology(New Series) 2014年第6期21卷 102-112页

作者： Nwe Nwe Htay Win Jian-Min Bao Gang Cui Purevsuren Dalaijargal School of Computer Science and Technology Harbin Institute of Technology Key Lab of Broadband Wireless Communication and Sensor Network Technolog Jiangsu Provincial Engineering Research Center of Telecommunications and Network TechnologyMinistry of Education

Due to a rapid increase in the number of functionally equivalent web services at open and dynamic Io T service environment,Qo S has become a major discrimination factor to reflect the user's expectation and experience of using a *** are different languages and models for expressing Qo S advertisements and requirements among service providers and ***,it leads to the issues of semantic interoperability of Qo S information and semantic similarity match between a semantic description of the service being requested by the service consumer,and a formal description of the service being offered by the service *** this paper,we propose a hierarchical two-layer semantic Qo S ontology to promote the description and declaration of Qo S-based service information in detail for any domain and ***,we develop a semantic matchmaking algorithm to compare the web services according to their Qo S information and adopt analytical hierarchy process( AHP) to make decision for the ranked services depending on the Qo S *** comparison study and experimental result show that our proposed system is superior to other service ranking approaches.

关键词： IoT service environment semantic QoS ontology semantic matchmaking algorithm QoS-based service information analytical hierarchy process

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A QoS-aware routing algorithm based on ant-cluster in wireless multimedia sensor networks

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Science China(Information Sciences) 2014年第10期57卷 77-92页

作者： HUANG HaiPing CAO Xiao WANG RuChuan WEN YongGang College of Computer Nanjing University of Posts and Telecommunications Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Key Lab of Broadband Wireless Communication and Sensor Network Technology of Ministry of Education Nanjing University of Posts and Telecommunications School of Computer Engineering Nanyang Technological University

QoS-aware routing algorithm is important in wireless multimedia sensor networks. This paper formulates a generalized QoS-aware routing model on the basis of multiple routing metrics and priorities of packets. We first introduce a 2D plain-based routing algorithm IPACR which improves the standard ant colony algorithm by optimizing the initial distribution of artificial pheromone in order to accelerate the algorithm convergence rate. Then a clustering-based routing algorithm ICACR is presented which can be well applied in a large scale network. ICACR is a variation of IPACR because it can be suitable for clustering cases to satisfy the larger scale situations. Both the numerical algorithm performance analysis and simulation of IPACR and ICACR are given. The results show that ICACR outperforms IPACR in terms of both network lifetime and QoS-aware routing metrics in large scale wireless multimedia sensor networks. Moreover, the simulation based on the real video traces shows that by extending the multi-path to ICACR for different priorities of video frames better performance can be achieved.

关键词： ant colony clustering-based multi-path QoS-aware routing algorithm wireless multimedia sensor networks

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Flexible user-centric service selection algorithm for Internet of Things services

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Journal of China Universities of Posts and Telecommunications 2014年第SUPPL. 1期21卷 64-70页

作者： Nwe, Nwe Htay Win Bao, Jian-Min Cui, Gang School of Computer Science and Technology Harbin Institute of Technology Harbin 15001 China Key Lab of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Nanjing 210003 China

In Internet of Things (IoT), the similar functional services are evolving in different quality of services (QoS) due to the widespread deployment of spatially distributed things on dynamic networks through the web. Therefore, the user involvement in service selection systems becomes a vital role to enhance the system performance by taking into account of subjective factors. This paper proposes a flexible QoS-based service selection algorithm (FQSA) which mainly targets to the users to be able to give their subjective preferences in an easy and friendly manner. The FQSA algorithm selects the services based on subjective information provided by the service consumers and objective information supported by the service providers. It adopts artificial neural network backpropagation algorithm to find the objective factors and applies similarity aggregation method to evaluate the creditability of the user subjective factors which have already been evaluated by ontological reasoning with the help of proposed QoS ontology. The comparative study and experimental results show that our FQSA algorithm is superior to other service selection approaches. © 2014 The Journal of China Universities of Posts and Telecommunications.

关键词： Neural networks

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Improved side information generation algorithm for Wyner-Ziv video coding

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The Journal of China Universities of Posts and Telecommunications 2014年第1期21卷 109-115页

作者： ZHANG Deng-yin WU Yuan-yuan WAN Ming-xiang Sci-Tech Park of Internet of Things Nanjing University of Posts and Telecommunication Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunication

Side information has a significant influence on the rate-distortion（RD） performance of distributed video coding（DVC）. In the conventional motion compensated frame interpolation scheme, all blocks adopt the same side-information generation method regardless of the motion intensity inequality at different regions. In this paper, an improved method is proposed. The image blocks are classified into two modes, fast motion and slow motion, by simply computing the discrete cosine transformation（DCT） coefficients at the encoder. On the decoder, it chooses the direct interpolation and refined motion compensated interpolation correspondingly to generate side information. Experimental results show that the proposed method, without increasing the encoder complexity, can increase the average peak signal-to-noise ratio（PSNR） by up to 1~ 2 dB compared with the existing algorithm. Meanwhile, the proposed algorithm significantly improves the subjective quality of the side information.

关键词： DVC side information motion estimation motion compensation

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network traffic application type identification based on gravitational clustering

Network traffic application type identification based on gra...

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2013 International Conference on Management Innovation and Information technology, MIIT 2013

作者： Zhang, Dengyin Li, Xiuyun Liao, Jianfei Wang, Mingxiang Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications China

ISBN: (纸本)9781845649401

The application identification, which aims at classifying traffic accurately, is the basic of the analysis network traffic. Various improved clustering methods which based on k-means are widely used in the application identification of the network traffic. However, these algorithms are highly complex, and difficult to meet the real-time and high accuracy of the application requirements in traffic identification. By taking the k-means as the prototype and merging distance and density together, this paper proposes a gravitational clustering method to identify network traffic type which has resolved the localized solutions problem of the original clustering algorithm. The experiment result and analysis show that, traffic identification method based on this paper has higher recognition rate, faster convergence, and better clustering effect. © 2014 WIT Press.

关键词： Clustering algorithms

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