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

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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Color image encryption using iterative phase retrieve process in quaternion Fourier transform domain

Color image encryption using iterative phase retrieve proces...

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2014年光子与光学工程国际会议暨西部光子学学术会议

作者： Liansheng Sui K.Duan Xi’an University of Technology &Shaanxi Key Laboratory for Network Computing and Security Technology(China) Xi’an University of Technology(China)

ISBN: (纸本)9781628415650

A single-channel color image encryption method is proposed based on iterative phase retrieve process in quaternion Fourier transform ***,three components of the plain color image is confused respectively by using cat ***,the confused components are combined into a pure quaternion image,which is encoded to the phase only function by using an iterative phase retrieve ***,the phase only function is encrypted into the gray scale ciphertext with stationary white noise distribution based on the chaotic diffusion,which has camouflage property to some *** corresponding plain color image can be recovered from the ciphertext only with correct keys in the decryption *** results verify the feasibility and effectiveness of the proposed method.

关键词： Fourier optics and signal processing,phase retrieval,cat map

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Independent component analysis based on information bottleneck

Abstract and Applied Analysis

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Abstract and Applied Analysis 2015年第1期2015卷

作者： Ke, Qiao Zhang, Jiangshe Srivastava, H.M. Wei, Wei Chen, Guang-Sheng School of Mathematics and Statistics Xi'An Jiaotong University Xi'an 710049 China Department of Mathematics and Statistics University of Victoria Victoria V8W3R4 BC Canada School of Computer Science and Engineering Xi'An University of Technology Shaanxi Key Laboratory for Network Computing and Security Technology Xi'an 710048 China Department of Construction and Information Engineering Guangxi Modern Vocational Technology College Hechi Guangxi 547000 China

The paper is mainly used to provide the equivalence of two algorithms of independent component analysis (ICA) based on the information bottleneck (IB). In the viewpoint of information theory, we attempt to explain the two classical algorithms of ICA by information bottleneck. Furthermore, via the numerical experiments with the synthetic data, sonic data, and image, ICA is proved to be an edificatory way to solve BSS successfully relying on the information theory. Finally, two realistic numerical experiments are conducted via FastICA in order to illustrate the efficiency and practicality of the algorithm as well as the drawbacks in the process of the recovery images the mixing images. © 2015 Qiao Ke et al.

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ESYN: Efficient synchronization clustering algorithm based on dynamic synchronization model

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Tongxin Xuebao/Journal on Communications 2014年 35卷 86-93页

作者： Dong, Xue-Wen Yang, Chao Sheng, Li-Jie Ma, Jian-Feng Shaanxi Key Laboratory of Network and System Security Xidian University Xi'an710071 China School of Computer Science and Technology Xidian University Xi'an710071 China

Clustering is an important research field in data mining. Based on dynamical synchronization model, an efficient synchronization clustering algorithm ESYN is proposed. Firstly, based on local structure information of a non-vector network, a new concept vertex similarity is brought up to describe the link density between vertices. Secondly, the network is vectoried by OPTICS algorithm and turned into one-dimensional coordination sequence. Finally, global coupling analysis is applied to generalized Kuramoto synchronization model, synchronization radius is increased and the optimal clustering result is automatically selected. The experimental results on a large number of synthetic and real-world networks show that proposed algorithm achieves high accuracy. ©, 2014, Editorial Board of Journal on Communications. All right reserved.

关键词： Clustering algorithms

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A Parking Guidance Method Based on Parallel Particle Swarm Optimization Algorithm

A Parking Guidance Method Based on Parallel Particle Swarm O...

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International Conference on Computational Intelligence and security

作者： Bin Wang Ying Liu Xinhong Hei Lei Wang Zhiqiang Zhang 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

ISBN: (纸本)9781479974351

Aiming at the problem of intelligent path guidance in the parking lot, an improved Particle Swarm Optimization Algorithm(PSO) is proposed in this paper to find the optimal path. In order to overcome the shortcomings that standard PSO traps into local optima easily and improve the convergence speed of algorithm, the concept of GA and Multi-thread technology are introduced. The experiment results show that the proposed parallel hybrid PSO algorithm(PHPSO) is relatively steady with faster convergent rate. Especially for multi-nodes, the efficiency is improved obviously. So the proposed PHPSO is well suited for large parking lot.

关键词： Sociology Statistics Particle swarm optimization Algorithm design and analysis Heuristic algorithms Convergence Vehicles

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Modeling for user interaction by influence transfer effect in online social networks

Modeling for user interaction by influence transfer effect i...

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Conference on Local Computer networks (LCN)

作者： Qindong Sun Nan Wang Yadong Zhou Hanqin Wang Liansheng Sui Shaanxi Key Laboratory of Network Computing and Security Xi'an University of Technology Xi'an China MOE KLINNS Lab Xi'an Jiaotong University Xi'an China

User interaction is one of the most important features of online social networks, and is the basis of research of user behavior analysis, information spreading model, etc. However, existing approaches focus on the interactions between adjacent nodes, which do not fully take the interactions and relationship between local region users into consideration as well as the details of interaction process. In this paper, we find that there exists influence transfer effect in the process of user interactions, and present a regional user interaction model to analyze and understand interactions between users in a local region by influence transfer effect. Based on real data from Sina Weibo, we validate the effectiveness of our model by the experiments of user type classification, influential user identification and zombie user identification in online social networks. The experimental results show that our model present better performance than the PageRank based method and machine learning method.

关键词： Analytical models Twitter Data models Laboratories Educational institutions Learning systems

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An adaptively secure multi-authority ciphertext-policy ABE scheme on prime order groups

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Tien Tzu Hsueh Pao/Acta Electronica Sinica 2014年第4期42卷 696-702页

作者： Li, Qi Ma, Jian-Feng Xiong, Jin-Bo Liu, Xi-Meng Ma, Jun School of Computer Science and Technology Xidian University Xi'an Shaanxi 710071 China School of Telecommunication Engineering Xidian University Xi'an Shaanxi 710071 China Shaanxi Key Laboratory of Network and System Security Xidian University Xi'an Shaanxi 710071 China

Previous adaptively secure multi-authority attribute-based encryption (ABE) schemes suffered from superfluous computation overhead on composite order groups. To tackle this problem, an adaptively secure multi-authority ciphertext-policy ABE (MA-CP-ABE) scheme on prime order groups was proposed when a dual pairing vector space approach was employed. The proposed scheme supports any monotone access structure, and is proven adaptively secure from the decisional linear assumption in the standard model. Performance analysis indicates that our scheme is more efficient while achieving the adaptive security.

关键词： Vector spaces

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Energy saving model and simulation test based on 6LoWPAN wireless sensor network

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Open Automation and Control Systems Journal 2014年第1期6卷 1349-1358页

作者： Zhang, Yunyi Li, Yong Zhang, Ran Wei, Wei College of Computer and Communication Engineering Zhengzhou University of Light Industry Zhengzhou China School of Computer Science and Engineering Shaanxi Key Laboratory for Network Computing and Security Technology Xi’an University of Technology Xi’an China

This paper designs the mathematical model of fiber line power, optimization of wireless sensor network node and multi distributed IP, and uses C language to program the model, finally get a new energy-saving mechanism model of wireless sensor network. Combined with the distributed IPv6 technology and IEEE802.15.4 protocol, this paper designs a new 6LoWPAN wireless sensor network energy-saving mechanism, which realizes the seamless splicing energy-saving effect between wireless sensor network and the internet, and based on this develops Contiki integrated environment of wireless sensor network energy-saving test. Finally this paper uses Firefox browser with B/S architecture to test energysaving mechanism. Through the test we found that between two nodes of wireless sensor network, they can effectively realize sending and receiving of UDP data, and through IPv6 gateway it can connect with internet, and complete collection and transmission of data. Through the simulation calculation of power consumption, in accepting, transmission and idle periods, the wireless sensor network can save energy effectively, which reduces the splicing cost of internet and wireless sensor network. It provides the technical reference for the design of wireless sensor network. © Zhang et al.

关键词： Sensor nodes

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Multi-user access control scheme based on resources hierarchies for perceptual layer of IoT

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Tien Tzu Hsueh Pao/Acta Electronica Sinica 2014年第1期42卷 28-35页

作者： Ma, Jun Guo, Yuan-Bo Ma, Jian-Feng Liu, Xi-Meng Li, Qi School of Computer Science and Technology Xidian University Xi'an Shaanxi 710071 China PLA Information Engineering University Zhengzhou Henan 450004 China Shaanxi Key Laboratory of Network and System Security Xidian University Xi'an Shaanxi 710071 China

A novel hierarchical access control scheme for perceptual layer of the IoT is presented based on resources hierarchies, which could conform to the secure and efficient access requirement of multi-user. In the scheme, every hierarchical node is composed of perceptual nodes which provide resources with the same levels of security. More hierarchical nodes can be modeled as a set of partially ordered classes. With this mode, a deterministic key derivation algorithm is designed, which makes every user and perceptual node possesses a single key material to get some keys, and obtains the resources at the presented class and all descendant classes in the hierarchy. Furthermore, a mechanism of Merkle tree is introduced to guarantee secure and efficient multi-user key material derivation by independent of each hash link. Compared with previous proposals, the scheme is more suitable for multi-user to access resources of perceptual layer in IoT.

关键词： Access control

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Parallelization using task parallel library with task-based programming model

Parallelization using task parallel library with task-based ...

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IEEE International Conference on Software Engineering and Service Sciences (ICSESS)

作者： Xinhong Hei Jinlong Zhang Bin Wang Haiyan Jin Nasser Giacaman School of Computer Science and Engineering Shaanxi Key Laboratory for Network Computing and Security Technology Xi'an Shaanxi Province China Department of Electrical and Computer Engineering The University of Auckland Auckland New Zealand

ISBN: (纸本)9781479932801

In order to reduce the complexity of traditional multithreaded parallel programming, this paper explores a new task-based parallel programming using the Microsoft .NET Task Parallel Library (TPL). Firstly, this paper proposes a custom data partitioning optimization method to achieve an efficient data parallelism, and applies it to the matrix multiplication. The result of the application supports the custom data partitioning optimization method. Then we develop a task parallel application: Image Blender, and this application explains the efficiency and pitfall aspects associated with task parallelism. Finally, the paper analyzes the performance of our applications. Experiments results show that TPL can dramatically alleviate programmer burden and boost the performance of programs with its task-based parallel programming mechanism.

关键词： Parallel processing Parallel programming Instruction sets Computational modeling Data models Educational institutions

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