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Potential field based routing to support QoS in WSN

Journal of Computational Information Systems 2012年第6期8卷 2375-2385页

作者： Liang, Qingwei Yao, Daoyuan Deng, Sui Gong, Siliang Zhu, Jian Key Lab. of Wireless Sensor Network and Communications Shanghai Institute of Microsystem and Information Technology Chinese Academy of Science Shanghai 200050 China Wuxi SensingNet Industrialization Research Institute Wuxi 214135 China

To design a routing protocol that saves sensor node energy while meeting the needs of different applications has become a research focus in wireless sensor network. In this paper, we propose Delay-Guaranteed Energy-Efficient Routing (DGEER) protocol, in which delay-sensitive packets are transmitted along the shortest path to minimize their end-to-end delay, while others are sent to the next hop which is selected based on local neighbor information, e.g., the remaining energy, the proportion covered by the length of data in the total length of the queue and the depth, which alleviates congestion at hot spots. The simulation results show that DGEER reduces the average end-to-end delay, balances the energy consumption, and prolongs network lifetime. © 2012 Binary Information Press.

关键词： Sensor nodes

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SAR RANGE AMBIGUITY SUPPRESSION VIA SPARSE REGULARIZATION

SAR RANGE AMBIGUITY SUPPRESSION VIA SPARSE REGULARIZATION

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IEEE International Geoscience and Remote Sensing Symposium

作者： Jian Fang Zongben Xu Chenglong Jiang Bingchen Zhang Wen Hong Ministry of Education Key Lab for Intelligent Networks and Network Security & Xi'an Jiaotong University Science and Technology on Microwave Imaging Laboratory & Institute of Electronics Chinese Academy of Sciences (IECAS)

ISBN: (纸本)9781467311601

Range ambiguity in synthetic aperture radar (SAR) imaging primarily arises from scattered energy of bright targets out-side the interested region. So to reduce the ambiguity, we need to identify these targets additionally, which yields an ill-posed problem. To find a feasible solution where the range ambiguity can be sufficiently reduced, we propose in this paper a new method using compressed sensing, a theory which tells when sparse signal can be reconstruct from undetermined linear system, by observing that the recognizable targets are approximately sparse in the ambiguous range zones. Therefore, it is possible to reconstruct the main region and identify the ambiguous targets simultaneously. The simulation results demonstrate the validation of the proposed method.

关键词： Range Ambiguity Suppression Compressed Sensing L_q Regularization

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Relay power allocation in auction-based game approach

Relay power allocation in auction-based game approach

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IEEE Global Communications Conference

作者： Dan Wu Yueming Cai Zhou, Liang Rodrigues, Joel Institute of Communications Engineering PLA University of Science and Technology The Key Lab of Broadband Wireless Communication and Sensor Network Technology (Nanjing University of Posts and Telecommunications) Ministry of Education Institute de Telecomunicacoes University of Beira Interior

ISBN: (纸本)9781467309202

In this work, with respect to the uncertainty about the individual information, we investigate the relay power allocation problem from the energy-efficient, Pareto optimal, and competitive fairness perspective. At first, we design an easy-implementation energy efficiency metric, which aims at striking a balance between the QoS provisioning and the energy consumption. Then, an auction mechanism is proposed for relay power allocation. By transferring the auction mechanism into a game, we prove the existence, uniqueness, and Pareto optimality of the Nash equilibrium (NE) for our auction game, and show that the allocation strategies from the NE can achieve the energy efficiency in terms of the proposed metric. Next, we develop a distributed relay power allocation algorithm based on our best-response functions to reach the Pareto optimal NE. Importantly, we not only certify the convergence of the proposed algorithm, but also provide quantitative analysis on it. Extensive simulations results are conducted to confirm the validity of the analytical results.

关键词： Wireless cooperative networks Auction theory Energy efficiency Power allocation Outage probability

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Practical privacy for value-added applications in vehicular ad hoc networks 5th

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5th International Conference on Internet and Distributed Computing Systems, IDCS 2012

作者： Zhang, Lei Wu, Qianhong Qin, Bo Domingo-Ferrer, Josep Shanghai Key Laboratory of Trustworthy Computing Software Engineering Institute East China Normal University Shanghai China UNESCO Chair in Data Privacy Dept. of Comp. Eng. and Maths Universitat Rovira i Virgili TarragonaCatalonia Spain Key Lab. of Aerospace Information Security and Trusted Computing Ministry of Education Wuhan University School of Computer China Department of Maths School of Science Xi’an University of Technology China

ISBN: (纸本)9783642348822

Advances in mobile networking and information processing technologies have triggered vehicular ad hoc networks (VANETs) for traffic safety and value-added applications. Most efforts have been made to address the security concerns while little work has been done to investigate security and privacy for value-added applications in VANETs. To fill this gap, we propose a value-added application, specifically, a security and privacy preserving location-based service (LBS) scheme for VANETs. For each LBS transaction, the scheme provides authentication, integrity and non-repudiation for both the service provider and the user. A user can obtain the service in an anonymous way and hence user privacy is well protected. However, a tracing procedure can be invoked to find malicious users, thereby efficiently preventing users from abusing the anonymity provided by the system. © Springer-Verlag Berlin Heidelberg 2012.

关键词： Location based services

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miRDeathDB:a database bridging microRNAs and the programmed cell death

miRDeathDB:a database bridging microRNAs and the programmed ...

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第五届全国生物信息学与系统生物学学术大会暨国际生物信息学前沿研讨会高通量时代的生物信息学与系统生物学

作者： Jianzhen Xu Yan-Hui Li College of Bioengineering Henan University of TechnologyZhengzhouChina 450001 Institute of Cardiovascular Sciences and Key Laboratory of Molecular Cardiovascular Sciences Ministry of EducationPeking University Health Science Center Scientific Data Center Computer Network Information CenterChinese Academy of Sciences

Background:MicroRNAs(miRNAs) are a class of small non-coding RNAs,which negatively regulate protein coding genes at the posttranscriptional *** tiny regulators have been associated to almost all known physiological and pathological *** defects in miRNAs have been implicated in the etiology of many forms of human diseases. Apoptosis,autophagy and programmed necrosis are three distinct yet intimately connected functional modules of programmed cell death(PCD).In the past few years,increasing evidences suggested that aberrant expression of miRNAs regulate different subroutines of *** the roles of miRNAs in PCD network has attracted interests of researchers from a wide range of ***,a knowledge depository,which integrates information for both miRNAs and their targets in PCD network,will be of great help. Methods:Based on PubMed search,we firstly collected literatures which reported the roles of miRNAs in PCD before April ***,these literatures were inspected manually and the miRNAs and their targets genes were *** criterion for selecting PCD associated miRNAs in miRDeathDB is *** morphological or biochemical data should be provided when the miRNAs(or their targets) are manipulated in cell death *** miRDeathDB(http://***/mirdeathdb/) was developed,which allows users to browse,search and analyze the PCD associated miRNAs. Results:In total,210 records covering 86 miRNAs and 95 protein coding genes were collected in five model species:humans(Homo sapiens),mice(Mus musculus),fruit flies (Drosophila melanogaster),rat(Rattus norvegicus) and African frog(Xenopus tropicalis). Users can search the database for both miRNAs and protein coding entries based on principal *** addition,users can browse and obtain full lists of miRNAs involved in PCD for any given *** data can be freely downloaded or accessed via our website for academic uses. Conclusions:miRDeathDB provides a valuab

关键词： microRNAs apoptosis autophagy necrosis

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Numen: network risk evaluation based on naïve bayes-based attack tree

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International Journal of Advancements in Computing technology 2012年第21期4卷 466-472页

作者： Wang, Hongbing Jing, Qi Liu, Heng Wang, Zhao Cheng, Li National Computer network Emergency Response technical Team Coordination Center of China Beijing China School of Software and Microelectronics Peking University Beijing China Institute Of Computing Technology Chinese Academy Of Sciences Beijing China School of Electronics Engineering and Computer Science Peking University Beijing China Key Lab of NSSA MoE China

Attack Tree has been widely used in network risk evaluation. However, in most situations attack trees can only describe the network risk in a visualized way and without any analysis of risk probabilities. This paper proposes Numen, a novel network risk evaluation mechanism based on an improved type of attack tree which is called naïve bayes-based attack tree. The Bayesian network theory is adopted to quantify the probability value of the leaf node in attack trees. The experiment shows that this mechanism is effective and it can provide help for laying a security policy effectively.

关键词： Risk assessment

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miRDeathDB: a database bridging microRNAs and the programmed cell death

miRDeathDB: a database bridging microRNAs and the programmed...

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第五届全国生物信息学与系统生物学学术大会

作者： Jianzhen Xu Yan-Hui Li College of Bioengineering Henan University of Technology Zhengzhou China 450001 Institute of Cardiovascular Sciences and Key Laboratory of Molecular Cardiovascular Sciences Ministry of Education Peking University Health Science Center 38 Xueyuan Road Haidian District Beijing China 100191 Scientific Data Center Computer Network Information Center Chinese Academy of SciencesBeijing China 100190

Background: MicroRNAs (miRNAs) are a class of small non-coding RNAs, which negatively regulate protein coding genes at the posttranscriptional *** tiny regulators have been associated to almost all known physiological and pathological *** defects in miRNAs have been implicated in the etiology of many forms of human ***, autophagy and programmed necrosis are three distinct yet intimately connected functional modules of programmed cell death (PCD).In the past few years, increasing evidences suggested that aberrant expression of miRNAs regulate different subroutines of *** the roles of miRNAs in PCD network has attracted interests of researchers from a wide range of ***, a knowledge depository, which integrates information for both miRNAs and their targets in PCD network, will be of great ***: Based on PubMed search, we firstly collected literatures which reported the roles of miRNAs in PCD before April ***, these literatures were inspected manually and the miRNAs and their targets genes were *** criterion for selecting PCD associated miRNAs in miRDeathDB is *** morphological or biochemical data should be provided when the miRNAs (or their targets) are manipulated in cell death *** miRDeathDB (http://***/mirdeathdb/) was developed, which allows users to browse, search and analyze the PCD associated ***: In total, 210 records covering 86 miRNAs and 95 protein coding genes were collected in five model species: humans (Homo sapiens), mice (Mus musculus), fruit flies (Drosophila melanogaster), rat (Rattus norvegicus) and African frog (Xenopus tropicalis).Users can search the database for both miRNAs and protein coding entries based on principal *** addition, users can browse and obtain full lists of miRNAs involved in PCD for any given *** data can be freely downloaded or accessed via our website for academic ***: miRDe

关键词： microRNAs apoptosis autophagy necrosis

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Query-aware anonymization in location-based service

Query-aware anonymization in location-based service

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2011 7th International Conference on Computational Intelligence and Security, CIS 2011

作者： Li, Wei Li, Guangye Liu, Chunlei Key Lab. of Beijing Network Technology School of Computer Science and Technology Beihang University Beijing China

ISBN: (纸本)9780769545844

Query privacy protection is an important part of the privacy protection in LBS. Currently, query privacy protection mainly consider the two typical attack models: query sampling attack and query homogeneity attack. The two attack model can be prevented by ensuring that cloaking regions satisfy k-sharing property or l-diversity property, however, when the overall POI (point of interests) distribution is non-uniform, attackers may still infer a specific user's query content with a high probability, which we refer to as skew attack. To address this issue, we modify the t-closeness model which is widely used in the data privacy protection, then we propose the QueryAwareCloak algorithm which is query-aware when generating cloaking regions. Finally, we verify the validation and effectiveness of the model and algorithm by experiments. © 2011 IEEE.

关键词： data privacy

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Improved quantum "Ping-pong" protocol based on GHZ state and classical XOR operation

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science China(Physics,Mechanics & Astronomy) 2011年第9期54卷 1612-1618页

作者： LI Jian JIN HaiFei JING Bo State Key Lab of Network and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China Department of Computer Science Beijing Institute of Applied Meteorology Beijing 100029 China

In order to transmit the secure message, a deterministic secure quantum direct communication protocol which was called ＂Ping-pong＂ protocol was proposed by Bostrrm and Felbinger [Bostrom K, et al. Phys Rev Lett, 2002, 89： 187902]. But the protocol was proved very vulnerable, and can be attacked by an eavesdropper. An improved ＂Ping-pong＂ protocol is presented to overcome the problem. The GHZ state particles are used to detect eavesdroppers, and the classical XOR operation which serves as a one-time-pad is used to ensure the security of the protocol. During the security analysis, the method of the entropy theory is introduced, and three detection strategies are compared quantitatively by using the constraint between the information which an eavesdropper can obtain and the interference introduced. If the eavesdropper gets the full information, the detection rate of the original ＂Ping-pong＂ protocol is 50%; the detection rate of the second protocol which used two particles of EPR pair as detection particles is also 50%; and the detection rate of the presented protocol is 75%. In the end, the security of the pro-posed protocol is discussed. The analysis results show that the improved ＂Ping-pong＂ protocol in this paper is more secure than the other two.

关键词：＂Ping-pong＂ protocol XOR operation GHZ state eavesdropping detection protocol security

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Quantum Secure Direct Communication with Five-Qubit Entangled State

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Chinese Physics Letters 2011年第3期28卷 17-20页

作者： LIN Song GAO Fei LIU Xiao-Fen School of Mathematics and Computer Science Fujian Normal UniversityFuzhou 350007 Key Lab of Network Security and Cryptography Fujian Normal UniversityFuzhou 350007 State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876

Recently,a genuine five-qubit entangled state has been achieved by Brown et al.[***.A 38(2005)1119].Later it was indicated that this state can be used for quantum teleportation and quantum state *** we build a quantum secure direct communication protocol with this state,and prove that it is secure in ideal *** the protocol,the sender performs unitary transformations to encode a secret message on his/her particles and sends them to the *** receiver then performs projective determinate measurement to decode the secret message ***,this protocol utilizes superdense coding to achieve a high intrinsic efficiency and source capacity.

关键词： conditions capacity quantum

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