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Quantum proxy signature scheme with public verifiability

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Science China(Physics,Mechanics & Astronomy) 2011年第10期54卷 1828-1832页

作者： zhou JingXian zhou yajian NIU XinXin YANG YiXian Key Laboratory of Network and Information Attack & Defence Technology of MOE Beijing University of Posts and Telecommunications Beijing 100876 China

In recent years, with the development of quantum cryptography, quantum signature has also made great achievement. However,the effectiveness of all the quantum signature schemes reported in the literature can only be verified by a designated ***, its wide applications are limited. For solving this problem, a new quantum proxy signature scheme using EPR quantumentanglement state and unitary transformation to generate proxy signature is presented. Proxy signer announces his public key whenhe generates the final signature. According to the property of unitary transformation and quantum one-way function, everyone canverify whether the signature is effective or not by the public key. So the quantum proxy signature scheme in our paper can be publicverified. The quantum key distribution and one-time pad encryption algorithm guarantee the unconditional security of this *** results show that this new scheme satisfies strong non-counterfeit and strong non-disavowal.

关键词： quantum cryptography proxy signature quantum one-way function public verifiably

Consistency of weighted feature set and polyspectral kernels in individual communication transmitter identification

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Frontiers of Electrical and Electronic Engineering in China 2010年第4期5卷 488-492页

作者： Na SUN yajian zhou Yixian YANG Information Security Center State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and TelecommunicationsBeijing 100876China Key Laboratory of Network and Information Attack and Defense Technology of Ministry of Education Beijing University of Posts and TelecommunicationsBeijing 100876China

This paper presents a method using support vector machine with polyspectral kernels for classification of individual ***,the neighborhood-roughset-based weighted feature set is *** experiments of the algorithms mentioned above indicate that they have consistency,which raises a new weighted *** experiment shows that better classification rate can be achieved.

关键词： polyspectral kernel support vector machine(SVM) neighborhood rough set weighted feature set weighted kernel

EFFECTS　OF　RETAINED　AUSTENITE　ON　DUPLEX　MICROSTRUCTURE　OF　MARTENSITE　AND　LOWER　BAINITE

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Acta Metallurgica Sinica(English Letters) 1996年第1期9卷 59-64页

作者： WEN Cui’e LIN Jianguo zhou yajian(Department of Materials Science,Beijing University of Aeronautics and Astronautics,Beijing 100083,China) Beijing Univ of Aeronautics and Astronautics Beijing China

The morphology and amount of the retained austenite in the duplex microstructure of martensite and tower bainite of a tow,alloy cold die steel(it is called GD steel for short) with high strength and high toughness have been *** thermal and mechanical stabilities of the retained austenite were *** the effects of retained austenite on the mechanical properties of the steel were *** results show that the morphology and amount of retained austenite vary with silicon content in the *** austenite with high stability was responsible for the simultaneous increase in strength and toughness of the *** duplex microstructure of martensite and abnormal lower bainite of the steel with the maximum silicon content exhibits a relatively good strength-toughness combination.

关键词： martensite bainite die steel retained austenite

CREEP BEHAVIOR OF AN EASY ORIENTED Ti-48Al PST CRYSTAL

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中国有色金属学会会刊：英文版 1996年第4期6卷 82-86页

作者： Lin Jianguo zhou yajian Zhang Yonggang Chen Changqi(Department of Materials Science and Engineering)(Beijing University of Aeronautics and Austronautics,Beijing 100083) BEIJING UNIV AERONAUT & ASTRONAUT DEPT MAT SCI & ENGNBEIJING 100083PEOPLES R CHINA

ＣＲＥＥＰＢＥＨＡＶＩＯＲＯＦＡＮＥＡＳＹＯＲＩＥＮＴＥＤＴｉ－４８ＡｌＰＳＴＣＲＹＳＴＡＬ￥ＬｉｎＪｉａｎｇｕｏ；ＺｈｏｕＹａｊｉａｎ；ＺｈａｎｇＹｏｎｇｇａｎｇ；ＣｈｅｎＣｈａｎｇｑｉ（ＤｅｐａｒｔｍｅｎｔｏｆＭ... 详细信息

ＣＲＥＥＰＢＥＨＡＶＩＯＲＯＦＡＮＥＡＳＹＯＲＩＥＮＴＥＤＴｉ－４８ＡｌＰＳＴＣＲＹＳＴＡＬ￥ＬｉｎＪｉａｎｇｕｏ；ＺｈｏｕＹａｊｉａｎ；ＺｈａｎｇＹｏｎｇｇａｎｇ；ＣｈｅｎＣｈａｎｇｑｉ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎ...

关键词： TiAl alloy PST crystal creep behavior

An Authenticated Dynamic Key Management Scheme for Clustered Sensor Networks

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China Communications 2010年第4期7卷 7-17页

作者： zhou yajian PAN Anwei LI Jiguo Information Security Center State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and Telecommunications Beijing 100876 China Key Laboratory of Network and Information Attack and Defence Technology of MOE Beijing University of Posts and Telecommunications Beijing 100876 China National Engineering Laboratory for Disaster Backup and Recovery Beijing University of Posts and Telecommunications Beijing 100876 China College of Computer ＆ Information Engineering Hohai University Nanjing 210098 China

Secure sensor networks has received much attention in the last few years.A sensor network always works unattended possibly in a hostile environment such as a *** such environments,sensor networks are subject to node *** energy,memory,and computational capabilities of sensor nodes mandate a clever design of security solutions to minimize overhead while maintaining secure communication over the lifespan of the *** this paper,an authenticated dynamic key management scheme,ADKM has been *** provides efficient,scalable,and survivable dynamic keying in a clustered sensor network with a large number of sensor *** employs a combinatorial exclusion basis system (EBS) for efficiency and one-way hash chains for *** of security and performance demonstrate that ADKM is efficient in security of sensor networks.

关键词： Wireless Sensor Networks Key Management Exclusion Basis Systems One-way Hash Chain

An Optimal Transmit Power Allocation for Multiple-Access Relay Channel with Analog Network Coding

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An Optimal Transmit Power Allocation for Multiple-Access Rel...

Security of Ad Hoc Network

2011 4th IEEE International Conference on Computer Science and Information Technology(ICCSIT 2011)

作者： Mingfeng Zhao yajian zhou Quan Yuan Yixian Yang School of Computer Science & Engineering University of Electronic Science and Technology of China National Engineering Laboratory for Disaster Backup and Recovery Beijing University of Posts and Telecommunications

ISBN: (纸本)9781510811249;1510811249

This paper investigates the transmit power allocation of practical analog network coding（ANC） schemes for multiple-access relay channel（MARC）,which consists of two source nodes,one relay node,and one destination node,all of which work in half-duplex mode with single *** this scenario,we show that optimal transmit power allocation under the goal of maximizing the total mutual information is *** numerical experimental results show that,the proposed method achieves better mutual information than traditional uniform power allocation,the total system mutual information has better performance than uniform power allocation,and analyze the impact of relay location,angle and power allocation factor on the system mutual information.

关键词： Analog Network Coding(ANC) Multiple-Access Relay Channel(MARC) Mutual Information(MI)

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ZTE Communications 2007年第4期5卷 24-26页

作者： zhou yajian Yang Yixian(Beijing University of Posts and Telecommunications,Beijing 100876,China)

An Ad hoc network is composed of wireless mobile *** there is no other wired infrastructure such as base stations,the ad hoc network,unlike other wireless networks such as Wireless Local Area Network(WLAN),has to face attacks from both the control plane and the data *** hoc should ensure the routing security on the control plane,and the secure forwarding of packets on the data *** distributed network protocol should operate safely,and peer-to-peer nodes should have trusting relations for each *** this purpose,a complete security solution should include three parts:security on the control plane,security on the data plane,and security of key management.

关键词： Hoc work node Security of Ad Hoc Network OSPF

A USER-DEPENDENT PERFECT-SCHEDULING MULTIPLE ACCESS PROTOCOL FOR VOICE-DATA INTEGRATION IN WIRELESS NETWORKS

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Journal of Electronics(China) 2002年第4期19卷 392-398页

作者： zhou yajian Li Jiandong Liu Kai (National Key Lab. of iSN and Information Science Institute, Xidian University, Xi’an 710071) National Key Lab. of ISN and Information Science Institute Xidian University Xi’an

A novel Multiple Access Control (MAC) protocol - User-dependent Perfect-scheduling Multiple Access (UPMA) protocol, which supports joint transmission of voice and data packets, is proposed. By this protocol, the bandwidth can be allocated dynamically to the uplink and downlink traffic with on-demand assignment and the transmission of Mobile Terminals (MTs) can be perfectly scheduled by means of polling. Meanwhile, a unique frame structure is designed to guarantee Quality of Service (QoS) in voice traffic supporting. An effective collision resolution algorithm is also proposed to guarantee rapid channel access for activated MTs. Finally, performance of UPMA protocol is evaluated by simulation and compared with MPRMA protocol. Simulation results show that UPMA protocol has better performance.

关键词： MAC protocol Quality of Service (QoS)

文本分类中互信息特征选择方法的研究与算法改进

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计算机应用 2013年第A02期33卷 116-118,152页

作者：辛竹周亚建北京邮电大学信息安全中心北京100876

在深入研究传统互信息特征选择方法的基础上,详细分析了该算法分类精确度不高的原因。针对传统互信息算法中的负相关现象以及倾向于选择低频特征词的问题,提出一种基于互信息的特征优化选择方法。该方法在综合考虑频度、集中度、分散度... 详细信息

在深入研究传统互信息特征选择方法的基础上,详细分析了该算法分类精确度不高的原因。针对传统互信息算法中的负相关现象以及倾向于选择低频特征词的问题,提出一种基于互信息的特征优化选择方法。该方法在综合考虑频度、集中度、分散度等因素的基础上,通过引入三个调整参数,有效地保证了负相关特征在文本分类中不可忽视的作用,并且提高了高频词汇的选择比重。实验表明,改进的方法可以有效地提高文本分类精度,并且具有更好的稳定性。

关键词：文本分类互信息特征选择负相关频度