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High-payload spread spectrum watermarking based on informed code phase shift keying

High-payload spread spectrum watermarking based on informed ...

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IEEE International Workshop on Anti-counterfeiting, Security, Identification, ASID

作者： Peng Zhang Ye Li Qiuyun Hao Jingsai Jiang Xiaoxia Chen Shandong Provincial Key Laboratory of Computer Networks Shandong Computer Science Center (National Supercomputer Center in Jinan) Jinan 250101 China Shandong Provincial Key Laboratory of Computer Networks National Supercomputer Center in Jinan Jinan China School of Software and Microelectronics Northwestern Polytechnical University Xian China

Code phase shift keying (CPSK) is an efficient M-ary modulation that can be applied to spread spectrum (SS) based watermarking to improve the watermark payload. However, the host media acts as interference that degrades the watermark robustness, especially in high-payload applications. In this paper, an informed embedding method for CPSK-based watermarking is proposed. The host is utilized at the embedder to improve the decoding performance at the extractor. Theoretically, compared with the non-informed methods such as traditional CPSK and code division multiple access (CDMA), the proposed method can reduce the decoding error rate by several orders of magnitude under the same watermark strength and payload. Moreover, experiments are conducted in audio watermarking, and the informed CPSK method exhibits better robustness against signal processing and attacks.

关键词： Watermarking Payloads Robustness Multiaccess communication Decoding Bit error rate Modulation

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Mining universal specification based on probabilistic model 27

Mining universal specification based on probabilistic model

引用

27th International Conference on Software Engineering and Knowledge Engineering, SEKE 2015

作者： Chen, Deng Zhang, Yanduo Wang, Rongcun Li, Xun Peng, Li Wei, Wei Industrial Robot Engineering Center Wuhan Institute of Technology Wuhan China Hubei Provincial Key Laboratory of Intelligent Robot Wuhan Institute of Technology Wuhan China School of Computer Science and Technology China University of Mining and Technology Xuzhou China Hubei Radio and TV University Wuhan China

ISBN: (纸本)1891706373

Class temporal specification is a kind of important program specifications, which specifies that methods of a class should be called in a particular sequence. Dynamic specification mining is a promising approach to achieve this kind of specifications automatically. However, they always infer partial specifications, that is, the mined specifications are biased to input programs or program execution traces. In this paper, we propose to mine class temporal specifications based on a probabilistic model in an online mode. Since our method can evolve mined specifications persistently, universal specifications can be achieved. To investigate our technique's feasibility and effectiveness, we implemented it in a prototype tool ISpecMiner and used the tool to perform experiments. Experimental results show that our method is promising to infer universal specifications if sufficient traces are provided for mining.

关键词： Specifications

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Secure bilinear pairing outsourcing made more efficient and flexible 15

Secure bilinear pairing outsourcing made more efficient and ...

引用

10th ACM Symposium on Information, computer and Communications Security, ASIACCS 2015

作者： Tian, Haibo Zhang, Fangguo Ren, Kui School of Information Science and Technology Sun Yat-sen University China Guangdong Provincial Key Laboratory of Information Security Guangzhou510006 China Department of Computer Science and Engineering University at Buffalo State University of New York NY14260-2500 United States

ISBN: (纸本)9781450332453

The increasing availability of cloud computing allows more and more mobile devices to outsource expensive computations. Among these computations, bilinear pairing is very fundamental and frequently-used by many modern cryptographic protocols. Currently, the most efficient outsourcing algorithm of bilinear pairings requires about 5 point additions in G1 and G2 and 4 multiplications in GT under the one-malicious version of a two-untrusted-program assumption. And the result of the algorithm is checkable with a probability about 1=2. In this paper, we improve the state-of-the-art by proposing two new outsourcing algorithms for bilinear pairings. One is a more efficient outsourcing algorithm under the same assumption with the same checkability. The other is more exible under a two-untrusted-program assumption with improved checkability. Both algorithms are better suited to various applications where on-line computations are strictly limited due to the lack of available computing resources. Copyright © 2015 ACM.

关键词： Outsourcing

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HPOSN: A Novel Online Social Network Model Based on Hybrid P2P

HPOSN: A Novel Online Social Network Model Based on Hybrid P...

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International Conference on Cloud Computing and Big Data (CCBD)

作者： Jiwei Wang Fangai Liu Xu Li Haoran Liu Xiaohui Zhao School of Information Science & Engineering Shandong Provincial Key Laboratory for Distributed Computer Software Technology Jinan China

Currently, online social networks are experiencing explosive growth, and play important roles in all aspects of lives, such as daily communication, online study and online dating. People's everyday life can't stand away from online social networks. With the advances of online social networks and popularity of intelligent mobile devices, more and more service providers are marketing their own online social network services, which providing competent services and ample functionalities. Nonetheless, almost all the mainstream social networks are based on the centralized servers or distributed server clusters. The whole system functions on the basis of the servers, so users depend excessively on servers. This kind of system architecture has potential single-point or multi-point failures though it can offer superior services to users. Users can't log into the system to obtain social services when the servers run into faults, such as equipment failures, link failures or network attacks. More seriously, ifcentralized databases meet with troubles, physical damages or mistake operations, massive user data perhaps could not be used or even lost. This paper defines the problem as Local Service Fault Partition (LSFP) and proposes a novel social network model called HPOSN which applies thoughts of P2P to solve LSFP and optimizes the centralized social network services. The prototype of HPOSN optimizes the communication overhead to control the flooding problem of P2P according to social relationship. Several simulation experiments with two parameters have been conducted, including the Recovery Time and the Recovery Success Rate. Results indicate that HPOSN can solve LSFP problem in centralized social networks pragmatically. Users in the LSFP area can recovery the social services locally through selforganizing and self-managing when they lose the services from centralized server or distributed server clusters. So HPOSN can improve the stability of social network services and user e

关键词： Social network services Servers Stability analysis Peer-to-peer computing Prototypes IP networks Big data

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Hierarchical CNN for traffic sign recognition

Hierarchical CNN for traffic sign recognition

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IEEE Symposium on Intelligent Vehicle

作者： Xuehong Mao Samer Hijazi Raúl Casas Piyush Kaul Rishi Kumar Chris Rowen Faculty of Electrical and Computer Engineering United States Naval Academy Annapolis MD USA School of Electronic Engineering Xidian University Xi’an China School of Computer and Information Science Hubei Engineering University Xiaogan China Centre for Quantum Computation & Intelligent Systems and the Faculty of Engineering and Information Technology University of Technology Sydney 81 Broadway Street Ultimo NSW Australia Center for Optical Imagery Analysis and Learning (OPTIMAL) State Key Laboratory of Transient Optics and Photonics Xi’an Institute of Optics and Precision Mechanics Chinese Academy of Sciences Xi’an Shaanxi China

ISBN: (纸本)9781509018222

The Convolutional Neural Network (CNN) is a breakthrough technique in object classification and pattern recognition. It has enabled computers to achieve performance superior to humans in specialized image recognition tasks. Prior art CNNs learn object features by stacking multiple convolutional/non-linear layers in sequence on top of a classifier. In this work, we propose a Hierarchical CNN (HCNN) which is inspired by a coarse-to-fine human learning methodology. For a given dataset, we introduce a CNN-oriented clustering algorithm to separate classes into K subsets, which are referred to as families. Then, the HCNN algorithm trains K+1 classification CNNs: one CNN for family classification and K dedicated CNNs corresponding to each family for member classification. We evaluate this HCNN approach on the German Traffic Sign Recognition Benchmark (GTSRB), and achieve 99.67% correct detection rate (CDR), which is superior to the best reported results (99.46%) achieved by a single network.

关键词： Clustering algorithms Training Classification algorithms Measurement Partitioning algorithms Standards Neural networks

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The Feasibility of Long Cycle Time Synchronization for Wireless Sensor networks

The Feasibility of Long Cycle Time Synchronization for Wirel...

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2015 4th National Conference on Electrical,Electronics and computer Engineering(NCEECE 2015)

作者： Fuqiang Wang Xiaoming Wu Hong Liu Yifan Hu Xiangzhi Liu Shandong Computer Science Center (National Supercomputer Center in Jinan) Shandong Academy of Sciences Shandong Provincial Key Laboratory of Computer Networks College of Information Science and Engineering Shandong University of Science and Technology

ISBN: (纸本)9781510819085

Energy efficiency has received extensive attention in energy-constrained Wireless Sensor networks(WSNs). As is known, radio communication accounts for major energy consumption of wireless device and the control of radio transmitter can make effective function with energy efficiency system. In this paper we test and analyse the relationship between precision and synchronization rate and we also give an initial model denote for the relationship among synchronous cycle, time error and energy consumption. The experiments and analysis in the paper show the feasibility of long cycle time synchronization for WSNs under certain limitation and the result will be helpful for the time synchronization method with low energy consumption.

关键词： Wireless Sensor networks Time Synchronization Low Energy Consumption Precision

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Virtual Network Embedding Based on Multi-objective Group Search Optimizer

Virtual Network Embedding Based on Multi-objective Group Sea...

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International Conference on Broadband, Wireless Computing, Communication and Applications (BWCCA)

作者： Ya-zhou Li Xiang-wei Zheng Dian-jie Lu School of Information Science and Engineering Shandong Provincial Key Laboratory for Distributed Computer Software Novel Technology Jinan China

Virtual network embedding problem is a multi-objective NP-hard problem. Various mapping objectives are often mutually restricted with each other. The existing methods are mostly converting them into a single-objective optimization, which make it difficult to balance the mapping objectives. Based on the concept of multi-objective optimization, a new virtual network embedding model is proposed in this paper. In order to balance mutual constraints of the objectives, two objective functions are defined and optimized simultaneously. Multi-objective group search optimizer is used to achieve the Pareto-optimal set, in which, the ranger searching strategy is improved to optimize the performance of the algorithm. Experimental results demonstrate that the proposed method owns good performance in terms of the revenue and acceptance ratio.

关键词： Substrates Search problems Optimization Bandwidth Heuristic algorithms Energy consumption Internet

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A Virtual Network Reconfiguration Algorithm Oriented to Energy Consumption

A Virtual Network Reconfiguration Algorithm Oriented to Ener...

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International Conference on Broadband, Wireless Computing, Communication and Applications (BWCCA)

作者： Zhen-hua Chen Xiang-wei Zheng Xi-bin Chen School of Information Science and Engineering Shandong Provincial Key Laboratory for Distributed Computer Software Novel Technology Jinan China

ISBN: (纸本)9781467383165

In the process of adopting network virtualization method to solve the network ossification problem, reconfiguration can effectively improve the acceptance ratio of virtual network requests and the resource utilization of substrate network. Energy consumption as an important evaluation factors, and combined with a reconfiguration algorithm, this paper propose energy-aware reconfiguration algorithm. The target physical nodes are chosen on the constraint of the minimum energy consumption, after then, the virtual node will be migrated to the target physical node, and then the virtual links that need be migrated will be remapped to the physical links by shortest path algorithm. This method can effectively improve the virtual network request acceptance ratio and reduce the energy consumption of the substrate network after reconfiguration. The results of simulation verify the effectiveness of this algorithm.

关键词： Energy consumption Substrates Power demand Virtualization Servers Resource management Load modeling

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An efficient topology-based algorithm for transient analysis of power grid 11th

An efficient topology-based algorithm for transient analysis...

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11th International Conference on Intelligent Computing, ICIC 2015

作者： Yang, Lan Wang, Jingbin Azevedo, Lorenzo Wang, Jim Jing-Yan School of Computer Science and Information Engineering Chongqing Technology and Business University Chongqing400067 China Tianjin Key Laboratory of Cognitive Computing and Application Tianjin University Tianjin300072 China National Time Service Center Chinese Academy of Sciences Xi’an710600 China Provincial Key Laboratory for Computer Information Processing Technology Soochow University Suzhou215006 China Computer Science Department University of Säo Paulo Säo Paulo SP05508-070 Brazil Thuwal23955-6900 Saudi Arabia

ISBN: (纸本)9783319221793

In the design flow of integrated circuits, chip-level verification is an important step that sanity checks the performance is as expected. Power grid verification is one of the most expensive and time-consuming steps of chip-level verification, due to its extremely large size. Efficient power grid analysis technology is highly demanded as it saves computing resources and enables faster iteration. In this paper, a topology-base power grid transient analysis algorithm is proposed. Nodal analysis is adopted to analyze the topology which is mathematically equivalent to iteratively solving a positive semi-definite linear equation. The convergence of the method is proved. © Springer International Publishing Switzerland 2015.

关键词： Topology

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A Consistent and Low-Overhead Time Synchronization Method for Wireless Sensor networks

A Consistent and Low-Overhead Time Synchronization Method fo...

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International Conference on Instrumentation, Measurement, computer, Communication and Control (IMCCC)

作者： Xiaoming Wu Yinglong Wang Fuqiang Wang College of Information Science and Engineering Shandong University of Science and Technology Qingdao China Shandong Provincial Key Laboratory of Computer Networks Shandong Computer Science Center (National Supercomputer Center in Jinan) Jinan China

ISBN: (纸本)9781467377249

Wireless Sensor networks (WSNs) is one of the hot topics in the field of information, which can be used in the special environment to realize the signal acquisition, processing and transmission. As a key technology of WSNs, time synchronization has achieved a wide range of attention and many scholars have come up with lots of methods to solve the problems for different applications. Among these problems the consistency of multi hop error in large scale networks is one of the key difficulties that need to be further considered. In this paper, a mobile node and many fixed nodes form a mobile wireless network. Furthermore the mobile node is used as the time source. In our method the synchronization process does not depend on any special network topology because fixed nodes directly synchronized to the mobile node that traverse the whole network periodically. For the nodes synchronize to the mobile node directly, the time synchronization of nodes in the network keeps in good consistency. Experiments and analysis suggest that our method has greatly improved the stability and consistency of the time synchronization in compare with the traditional hop by hop synchronization method.

关键词： Synchronization computers Wireless sensor networks Instruments Mobile computing

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