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2015 International Conference on Advanced Management Science and Information Engineering(AMSIE 2015)

作者： H.Y.Jin B.Xing X.H.Hei School of Computer Science & Engineering Xi'an University of Technology Shaanxi Key Laboratory for Network Computing and Security Technology

The paper mainly uses a mixed strategy of data and task parallelism to realize parallel extraction date information of *** at the deficiency of ordinary pipeline mode for parallel extraction date information from invoice,we explore a new method of load balanced pipeline based on multiple producers,using parallelism model of mixed data and task provided by TPL(the Task Parallel Library).Finally,it shows this load balanced pipeline program can almost get a linear speedup,which can reach 7.2x in a 8 cores system.

关键词： paralleled TPL pipeline load balanced

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Research on Storage and Retrieval Method of Mass Data for High-Speed Train

Research on Storage and Retrieval Method of Mass Data for Hi...

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International Conference on Computational Intelligence and security

作者： Bin Wang Fan Li Xinhong Hei Weigang Ma Lei Yu Shaanxi Key Laboratory for Network Computing and Security Technology Xi'an University of Technology Xi'an China School of Computer Science and Engineering Xi'an University of Technology Xi'an China

In order to ensure the safeties of high-speed train, a lot of sensors are installed in the train to real-time monitor its operation status. These sensors collect amounts of data which may be several GBs for one time operation of one train. Such big amount data need to be stored and managed with high efficiency. In this paper, a hybrid storage architecture by combine database and file system is proposed, in which the separation on the row and column is performed respectively when storing the raw monitored data. Further, an improved compression algorithm is used to compress double float data in the monitored data. The simulation result shows that the proposed method is effective and feasible.

关键词： Memory Indexes File systems Monitoring Sensors Servers

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A method of oversized image generation based on stitching JPEG file streams

International Journal of Signal Processing, Image Processing...

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International Journal of Signal Processing, Image Processing and Pattern Recognition 2015年第8期8卷 159-168页

作者： Sun, Qindong Hua, Wu Tian, Minying Wang, Yan School of Computer Science and Engineering Xi’an University of Technology Xi’an China Shaanxi Key Laboratory of Network Computing and Security Xi’an University of Technology Xi’an China

Due to memory limitation, the displaying and processing of the oversized images have been a bottleneck for various applications, which is a hot research spot in the image processing field. The traditional methods are almost based on the BMP format to generate oversized images, of which the time and space complexity are very high. In this paper, we have deeply analyzed the encoding scheme of JPEG image and proposed an oversized image generation method based on stitching JPEG file streams. According to this method, the oversized images are block plotted and then transformed and saved as JPEG format files respectively. In the end, the block JPEG files are then combined into an integrated JPEG image. The experiment results show that, our method can effectively improve the speed of oversized image generation and reduce the memory consumption. The time and space performance of our method are better than existing methods. © 2015 SERSC.

关键词： Image enhancement

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Linear (k, n) Secret Sharing Scheme with Cheating Detection

Linear (k, n) Secret Sharing Scheme with Cheating Detection

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International Conference on computer and Information technology (CIT)

作者： Yan-xiao Liu Zhi-xiao Wang Wen-yao Yan Shaanxi Key Lab for Network Computing and Security Xian University of Technology Xian China Xian Innovation College Yanan University Xian China

Linear (k,n) secret sharing scheme is a class of (k,n) secret sharing, where all the n shares of a secret satisfy a linear relationship. It plays an important role in other cryptographic systems, such as multi-party computation and function sharing schemes. On the other hand, cheating problem in (k,n) secret sharing is an important issue, such that cheaters (dishonest players) submit forged shares during secret reconstruction to fool honest players. During decades of research on cheating prevention, vast (k,n) secret sharing schemes against cheating have been proposed. However, most of these schemes are not linear schemes since it contains redundant information in their shares to achieve cheating detection. Since linear (k,n) secret sharing is an important primitive in threshold cryptography, linear (k,n) secret sharing scheme with the capability of cheating detection is also worthwhile to be discussed. In this paper, we propose a linear (k,n) secret sharing scheme against cheating based on Shamir's original scheme, which possesses the following merits: (1) Our scheme is just combination of two Shamir's schemes. Therefore, our scheme can be used in other threshold cryptographic systems which are based on Shamir's scheme. (2) The size of share in proposed scheme almost reaches its theoretic lower bound in (k,n) secret sharing with cheating detection. (3) In the phase of cheating detection, only one honest player can detect the cheating from other k-1 cheaters, which achieves a stronger detection effective than the previous linear secret sharing schemes against cheating.

关键词： Cryptography Information rates Conferences computers Information technology Ubiquitous computing

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Analysis and improvement of a provable secure fuzzy identity-based signature scheme

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Science China(Information Sciences) 2014年第9期57卷 156-160页

作者： XIONG Hu CHEN YaNan ZHU GuoBin QIN ZhiGuang School of Computer Science and Engineering University of Electronic Science and Technology of China Chongqing Key Lab of Computer Network and Communication Technology Key Lab of Network Security and Cryptology Fujian Normal University School of Traffic and Transportation Beijing Jiaotong University

To enjoy the property of error tolerance in the biometric identities extraction,the fuzzy identitybased signature has been initialized to issue a signature on behalf of a descriptive attributes setωinstead of a single *** attributes setω′can be used to verify the validity of the signature in case the distance betweenωandω′is less than a pre-defined ***,Wang re-formalized the notion of fuzzy identitybased signature and proposed a concrete pairing-based construction along with the efficiency analysis and formal security ***,by giving concrete attack,we indicate that Wang’s scheme is not secure against forgery *** also present an improved scheme to prevent this attack.

关键词： identity-based cryptosystem fuzzy identity-based signature forgery attack cryptanalysis bilinear pairings

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An ML estimation based robust Chinese remainder theorem for reals

An ML estimation based robust Chinese remainder theorem for ...

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IEEE China Summit & International Conference on Signal and Information Processing (ChinaSIP)

作者： Wenjie Wang Xiaoping Li Xiang-Gen Xia MOE Key Lab for Intelligent Networks and Network Security Xi'an Jiaotong University Xian Shaanxi P. R. China Xidian University Xian China Department of Electrical and Computer Engineering University of Delaware Newark DE USA

ISBN: (纸本)9781479919499

In this paper, we consider the CRT problem for real numbers with noisy remainders that follow wrapped Gaussian distributions. We propose the maximum likelihood (ML) estimation based CRT when the remainder noises may not necessarily have the same variances. The proposed algorithm only needs to search for the solution among L elements, where L is the number of remainders. We compare the performances of the newly proposed algorithm and the existing algorithm in term of numerical simulations. The results demonstrate that the proposed algorithm not only has a better performance when the remainders have different error levels/variances, but also has a much lower computational complexity.

关键词： Robustness Maximum likelihood estimation Noise Image reconstruction Noise measurement Computational complexity

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Next Generation of Web-based Information Management System for National Volunteer Service

Next Generation of Web-based Information Management System f...

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2015 Joint International Mechanical,Electronic and Information technology Conference(JIMET 2015)

作者： Feng Tian Yundong Yao Tian Lan Qinghua Zheng Jingjing Kou Haifei Fu Nazaraf Shah Systems Engineering Institute Xi'an Jiaotong University Shaanxi Province Key Lab.of Satellite and Terrestrial Network Tech.R&D Department of Computer Science and Technology Xi'an Jiaotong University

ISBN: (纸本)9781510817982

This paper presents a survey about the existing web-based information management system for volunteer services. Based on the survey results the paper highlights the new features and functions of the next generation of the volunteer service system. A prototype system incorporating these features and functions has also been implemented and presented.

关键词： volunteer service volunteer information management next generation

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Alias Detection Across Multi-online Applications Based on User's Behavior Characteristics

Alias Detection Across Multi-online Applications Based on Us...

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IEEE International Conference on Trust, security and Privacy in Computing and Communications (TrustCom)

作者： Zhaoli Liu Tao Qin Xiaohong Guan Xiaoqiang Niu Tao Yang MoE Key Lab for Intelligent Networks and Network Security Xi'an Jiaotong University Xi'an Shaanxi China Tsinghua National Laboratory for Information Science and Technology Tsinghua University Beijing China Department of Automation Northwestern Polytechnical University Xi'an China

ISBN: (纸本)9781467379533

The quickly development of many online applications benefit our daily life. But on the other hand, user usually holds several aliases in different online applications. The aliases across multi-online applications detection are becoming more and more important for E-marketing and user's behavior monitoring. In this paper, we propose a method for detecting aliases across multi-online applications. Firstly, we employ the active and positive methods to collect the user's alias and behavior information from several famous applications, including Email, RenRen and etc. Then we analyzed the user's behavior characteristics in specific applications, and some interesting findings are proposed. Finally, we perform the alias detection based on user's behavior profiles, including the similarity of the ID and the number of appearance in specific IP address. According to user's behavior habit, the aliases belong to the same physical users are usually similar with each other. Furthermore, one specific user usually use the same computer to login into different applications, thus the IP addresses used for accessing those applications usually same with each other. Based on those assumptions we employ the Bayesian network to perform alias detection. Empirical results based on actual data verify the efficiency and correctness of the proposed methods.

关键词： Multi-application Alias detection Bayes networks

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Energy management of cooperative microgrids with P2P energy sharing in distribution networks

Energy management of cooperative microgrids with P2P energy ...

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IEEE International Conference on Smart Grid Communications (SmartGridComm)

作者： Tian Liu Xiaoqi Tan Bo Sun Yuan Wu Xiaohong Guan Danny H. K. Tsang Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology Hong Kong MOE Key Lab for Intelligent Networks and Network Security Xi'an Jiaotong University Xi'an China College of Information Engineering Zhejiang University of Technology Hangzhou China

To handle the mismatch problem between local demand and local generation in microgrids (MGs), the paradigm of peer-to-peer (P2P) energy sharing among neighboring MGs has been considered as a promising solution for improving the utilization of local distributed energy resources and saving the energy bills for all MGs. Existing works on cooperative MGs usually consider the high-level energy sharing and trading strategies but little about the physical constraints (e.g. voltage tolerance and power flow constraints) in the underlying distribution network. Hence, their solutions may not be applicable to practical power systems. This paper proposes an optimization problem that aims at minimizing the overall energy cost and the P2P energy sharing losses in a distribution network consisting of multiple MGs and explicitly incorporates the practical constraints (e.g., power balance and battery's operational constraints). The proposed optimization problem is difficult to solve directly due to the non-convex constraints. Nevertheless, motivated by the very recent result in radial distribution networks, the proposed non-convex optimization problem can be relaxed to a second-order cone programming (SOCP) problem without incurring any loss of optimality. We apply the proposed problem to a radial distribution network testbed and obtain the corresponding optimal energy management strategy, which exploits the diversified energy consumption profiles to dynamically coordinate multiple MGs and reduces the total energy bill of all MGs. Moreover, an interesting observation from the simulation results is that the cooperation scheme in the P2P sharing network is significantly affected by the MGs' relative locations in the distribution network.

关键词： Propagation losses Smart grids Microgrids Optimization Numerical models Renewable energy sources

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Stability analysis of information spreading on SNS based on refined SEIR model

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China Communications 2014年第11期11卷 24-33页

作者： Wang, Chao Hu, Yuanping Liu, Chengyuan Liu, Zhihong Ma, Jianfeng School of Computer Science and Technology Xidian University Xi'an 710071 China Shaanxi Key Laboratory of Network and System Security Xidian University Xi'an 710071 China

Investigating the stability of information spreading over SNS helps to understand the principles inherent in the spreading behavior. This paper explores the mechanisms of information spreading including stifling mechanism, latent mechanism and forgetting mechanism, establishes a refined SEIR model, and builds the corresponding mean-field equations. The methods of the differential dynamics and the next generation matrix are used to calculate the equilibriums and the basic reproductive number, and the asymptotical stability of the network equilibriums are proved theoretically. Simulation experiments are carried out to analyze the effect of the spreading mechanisms on the information spreading process and the results support our conclusions. © 2013 IEEE.

关键词： asymptotical stability basic reproduction number information spreading model SNS

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