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Entanglement Properties Between Two Spatially Separated Atoms with Cascade Configuration in Free Space

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Communications in Theoretical Physics 2010年第3期53卷 555-559页

作者：杨国晖张均锋苗向阳周玲 schooi of Physics and information Engineering Shanxi Normal University School of Physics and Optoelectronic Technology Dalian University of Technology

We investigate the entanglement properties between two identical atoms with cascade configuration through the retarded dipole-dipole interaction in free space when their spatial separation is on the order of radiation wavelength or less. We analyze the function of Hamiltonian induced by dipole-dipole interaction. By solving master equation, we show that the spontaneous emission induce entanglement and destroy entanglement too. We also show the long life time of entanglement within cascade configuration.

关键词： entanglement atoms spontaneous emission

Painlevé integrability of a generalized fifth-order KdV equation with variable coefficients: Exact solutions and their interactions

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Chinese Physics B 2013年第5期22卷 75-82页

作者：徐桂琼 Department of information management College of ManagementShanghai University

By means of singularity structure analysis, the integrability of a generalized fifth-order KdV equation is investigated. It is proven that this equation passes the Painleve test for integrability only for three distinct cases. Moreover, the multi- soliton solutions are presented for this equation under three sets of integrable conditions. Finally, by selecting appropriate parameters, we analyze the evolution of two solitons, which is especially interesting as it may describe the overtaking and the head-on collisions of solitary waves of different shapes and different types.

关键词： generalized fifth-order KdV equation Painleve integrability soliton solution symbolic computa-tion

Analyzing the Value of Location information for Four Taxi Dispatching Modes

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Tsinghua Science and Technology 2005年第z1期10卷 844-851页

作者： XU Zhengchuan JIN Huiliang LING Hong Department of information management and information Systems School of ManagementFudan University Shanghai 200433 China Department of Information Management and Information Systems School of ManagementFudan University Shanghai 200433 China Department of Information Management and Information Systems School of ManagementFudan University Shanghai 200433 China

Location-based service (LBS) is often quoted as one of the killer applications of mobile commerce. The LBS, especially the GPS dispatching system, is often adopted by taxi operators for fleet management, but there is no theoretical analysis on the real value of location information for dispatching services. This paper presents four types of dispatching modes and how location information is obtained and used to support dispatching services. Then the Pros and Cons of different taxi dispatching modes were compared. It is concluded that different mode fits different situations, no one overwhelms all situation, even if the GPS-based dispatching mode. The value of the GPS-based dispatching service then was further analyzed through the case study of DaZhong Company in Shanghai, China. The results show that the use of the up-to-date GPS technology radically changes the traditional approaches to taxi dispatching and enables companies to enhance customers'satisfaction.

关键词： mobile commerce location-based service (LBS) taxi dispatching

Modified Multivariate Process Capability Index Using Principal Component Analysis

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Chinese Journal of Mechanical Engineering 2014年第2期27卷 249-259页

作者： ZHANG Min WANG G Alan HE Shuguang HE Zhen Department of Industrial Engineering Tianjin University Department of Business information Technology Department of information management and management Science Tianjin University

The existing research of process capability indices of multiple quality characteristics mainly focuses on nonconforming of process output, the concept development of tmivariate process capability indices, quality loss function and various comprehensive evaluation methods. The multivariate complexity increases the computation difficulty of multivariate process capability indices（MPCI）, which makes them hard to be used in practice. In this paper, a new PCA-based MPCI approach is proposed to assess the production capability of the processes that involve multiple product quality characteristics. This approach first transforms the original quality variables into standardized normal variables. MPCI measures are then provided based on the Taam index. Moreover, the statistical properties of these MPCIs, such as confidence intervals and lower confidence bound, are given to let the practitioners understand the capability indices as random variables instead of deterministic variables. A real manufacturing data set and a synthetic data set are used to demonstrate the effectiveness of the proposed method. An implementation procedure is also provided for quality engineers to apply our MPCI approach in their manufacturing processes. The case studies demonstrate the effectiveness and feasibility of this new kind of MPCI, which is easier to be used in production practice. The proposed research provides a novel approach of MPCI calculation.

关键词： process capability index multivariate specification region principal component analysis confidence interval

Efficient and secure three-party authenticated key exchange protocol for mobile environments

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Journal of Zhejiang University-Science C(Computers and Electronics) 2013年第5期14卷 347-355页

作者： Chih-ho CHOU Kuo-yu TSAI Tzong-chen WU Kuo-hui YEH Department of information management National Taiwan University of Science and Technology Department of management information Systems Hwa Hsia Institute of Technology Department of information management National Dong Hwa University

Yang and Chang (2009) proposed a three-party authenticated key exchange protocol for securing communications in mobile-commerce environments. Their protocol reduces computation and communication costs by employing elliptic curve cryptosystems. However, Tan (2010) pointed out that Yang and Chang (2009)'s protocol cannot withstand impersonation and parallel attacks, and further proposed an enhanced protocol to resist these attacks. This paper demonstrates that Tan (2010)'s approach still suffers from impersonation attacks, and presents an efficient and secure three-party authenticated key exchange protocol to overcome shown weaknesses.

关键词： Three-party Key exchange Authentication Mobile environments

Non-degeneracy of Extremal Points

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Chinese Annals of Mathematics,Series B 2015年第1期36卷 45-50页

作者： Min ZHOU School of information management Nanjing University

For a family of smooth functions, the author shows that, under certain generic conditions, all extremal(minimal and maximal) points are non-degenerate.

关键词： Non-degeneracy Extremal point Generic condition

Comments on Enhanced Yoking Proof Protocols for Radio Frequency Identification Tags and Tag Groups

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Journal of Shanghai Jiaotong university(Science) 2011年第5期16卷 604-609页

作者：简宏宇叶明贵吴宗成李静怡 Department of information management National Chi-Nan University Department of information management Nanya Institute of Technology Department of information management National Taiwan University of Science and Technology Department of information management Ling Tung University

A radio frequency identification (RFID) yoking proof scheme can generate proofs of simultaneous presence of two tags in the range of a specified reader so that an off-line verifier can verify the proofs later. This proof has found several interesting applications. However, many existing RFID yoking schemes are vulnerable to replay attacks. To overcome the weaknesses, Cho et al. proposed a new RFID yoking proof protocol and a new grouping protocol. Unfortunately, Cho et al.'s schemes are still vulnerable to replay attacks. In this paper, in addition to demonstrating weaknesses, we further discuss the rationale behind these weaknesses to provide a guide line for designing secure RFID yoking schemes. Based on the guide line, we propose a new RFID yoking scheme and a new RFID grouping scheme. Performance evaluation shows that our scheme outperforms its counterparts.

关键词： radio frequency identification (RFID) yoking authentication replay attack grouping

VLSI scaling methods and low power CMOS buffer circuit

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Journal of Semiconductors 2013年第9期34卷 92-99页

作者： Vijay Kumar Sharma Manisha Pattanaik Department of information Technology ABV-Indian Institute of Information Technology & Management

Device scaling is an important part of the very large scale integration （VLSI） design to boost up the success path of VLSI industry, which results in denser and faster integration of the devices. As technology node moves towards the very deep submicron region, leakage current and circuit reliability become the key issues. Both are increasing with the new technology generation and affecting the performance of the overall logic circuit. The VLSI designers must keep the balance in power dissipation and the circuit＇s performance with scaling of the devices. In this paper, different scaling methods are studied first. These scaling methods are used to identify the effects of those scaling methods on the power dissipation and propagation delay of the CMOS buffer circuit. For mitigating the power dissipation in scaled devices, we have proposed a reliable leakage reduction low power transmission gate （LPTG） approach and tested it on complementary metal oxide semiconductor （CMOS） buffer circuit. All simulation results are taken on HSPICE tool with Berkeley predictive technology model （BPTM） BSIM4 bulk CMOS files. The LPTG CMOS buffer reduces 95.16% power dissipation with 84.20% improvement in figure of merit at 32 nm technology node. Various process, voltage and temperature variations are analyzed for proving the robustness of the proposed approach. Leakage current uncertainty decreases from 0.91 to 0.43 in the CMOS buffer circuit that causes large circuit reliability.

关键词： LPTG buffer power dissipation propagation delay scaling nanoscale CMOS figure of merit

Enhanced Privacy Preserving for Social Networks Relational Data Based on Personalized Differential Privacy

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Chinese Journal of Electronics 2022年第4期31卷 741-751页

作者： KANG Haiyan JI Yuanrui ZHANG Shuxuan School of information management Beijing Information Science and Technology University Computer School Beijing Information Science and Technology University

With the popularization and development of social software, more and more people join the social network, which produces a lot of valuable information, but also contains plenty of sensitive privacy information. To achieve the personalized privacy protection of massive social network relational data, a privacy enhancement method for social networks relational data based on personalized differential privacy is proposed. And a dimensionality reduction segmentation sampling(DRS-S)algorithm is proposed to implement this method. First, in order to solve the problem of inefficiency caused by the excessive amount of data in social networks, dimension reduction and segmentation are carried out to divide the data into groups. According to the privacy protection requirements of different users, we adopt sampling method to protect users with different privacy requirements at different levels, so as to realize personalized different privacy. After that, the noise is added to the protected data to satisfy the privacy budget. Then publish the social network data. Finally, the proposed algorithm is compared with the traditional personalized differential privacy(PDP) algorithm and privacy preserving approach based on clustering and noise(PBCN) in real data set, the experimental results demonstrate that the quality of privacy protection and data availability of DRS-S are better than that of PDP algorithm and PBCN algorithm.

关键词： Social network Privacy preserving Dimensionality reduction segmentation Personalized differential privacy DRS-S algorithm