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21st ACM International Conference on Multimedia, MM 2013

作者： Zhang, Chunjie Zhang, Yifan Wang, Shuhui Pang, Junbiao Liang, Chao Huang, Qingming Tian, Qi School of Computer and Control Engineering University of Chinese Academy of Sciences 100049 Beijing China National Laboratory of Pattern Recognition Institute of Automation Chinese Academy of Sciences Beijing China Key Lab of Intell. Info. Process Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China College of Computer Science and Technology Beijing University of Technology 100124 Beijing China School of Computer National Engineering Research Center for Multimedia Software Wuhan University 430072 Wuhan China Department of Computer Sciences University of Texas at San Antonio San Antonio TX 78249 United States

ISBN: (纸本)9781450324045

The bag of visual words model (BoW) and its variants have demonstrate their effectiveness for visual applications and have been widely used by researchers. The BoW model first extracts local features and generates the corresponding codebook, the elements of a codebook are viewed as visual words. The local features within each image are then encoded to get the final histogram representation. However, the codebook is dataset dependent and has to be generated for each image dataset. This costs a lot of computational time and weakens the generalization power of the BoW model. To solve these problems, in this paper, we propose to undo the dataset bias by codebook linear transformation. To represent every points within the local feature space using Euclidean distance, the number of bases should be no less than the space dimensions. Hence, each codebook can be viewed as a linear transformation of these bases. In this way, we can transform the pre-learned codebooks for a new dataset. However, not all of the visual words are equally important for the new dataset, it would be more effective if we can make some selection using sparsity constraints and choose the most discriminative visual words for transformation. We propose an alternative optimization algorithm to jointly search for the optimal linear transformation matrixes and the encoding parameters. Image classification experimental results on several image datasets show the effectiveness of the proposed method. Copyright © 2013 ACM.

关键词： Linear transformations

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Information security innovation: Personalisation of security services in a mobile cloud infrastructure 1

Information security innovation: Personalisation of security...

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1st Workshop on Theories and Intricacies of Information Security Workshop, INTRICATE-SEC 2012

作者： Eloff, Jan H.P. Eloff, Mariki M. Bihina-Bella, Madeleine A. Isherwood, Donovan Dlamini, Moses Ngassam, Ernest K. SAP Research Internet Application and Services Africa Pretoria South Africa Institute of Corporate Citizenship University of South Africa South Africa Faculty of ICT Tshwane University of Technology Pretoria South Africa Academy of Computer Science and Software Engineering University of Johannesburg South Africa Department of Computer Science University of Pretoria South Africa CSIR Meraka Pretoria South Africa

ISBN: (纸本)9783869562049

The increasing demand for on-line and real-time interaction with IT infrastructures by endusers are facilitated by the proliferation of user centric devices such as laptops, iPods, iPads, and smartphones. This trend is furthermore propounded by the plethora of apps down loadable to end-user devices mostly within mobile-cum-cloud environments. It is clear that there are many evidences of innovation with regard to end-user devices and apps. Unfortunately little, if any, information security innovation took place over the past number of years with regard to the consumption of security services by end-users. This creates the need for innovative security solutions that are humancentric and flexible. This paper presents a framework for consuming loosely coupled (but interoperable) cloud-based security services by a variety of end-users, in an efficient and flexible manner using their mobile devices.

关键词： Interoperability

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Building a laboratory surveillance system via a wireless sensor network

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8th International Conference on Grid and Pervasive Computing, GPC 2013

作者： Lei, Chi-Un Seon, J.K. Shen, Zhun Lokman, Ka Hughes, Danny Kim, Youngmin Department of Electrical and Electronic Engineering University of Hong Kong Pokfulam Road Hong Kong Hong Kong LS Industrial Systems Korea Republic of Department of Computer Science and Software Engineering Xi'an Jiaotong-Liverpool University Suzhou China Myongji University Korea Republic of Baltic Institute of Advanced Technology Lithuania Department of Computer Science KU Leuven Flanders Belgium UNIST Academy-Industry Research Corporation Korea Republic of

ISBN: (纸本)9783642380266

Contemporary technical experimentations become complicated. Therefore, a smart laboratory environment is needed for effective laboratory activities. In particular, a monitoring/surveillance system is needed to detect and regulate extreme ambient conditions in the laboratory. In this paper, we describe how a thermal comfort laboratory surveillance system is constructed via the deployment of a wireless sensor network (WSN). In order to prolong system lifetime as well as improve system reliability, a habit-based adaptive sensing mechanism has been proposed. Evaluations of on-site deployment results indicate the functionality and feasibility of the proposed WSN. © 2013 Springer-Verlag.

关键词： Wireless sensor networks

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A framework for provisioning restful services on mobile devices

A framework for provisioning restful services on mobile devi...

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International Conference on Adaptive science & Technology (ICAST)

作者： Charl van der Westhuizen Marijke Coetzee SAP P&I BIT Mobile Empowerment University of Johannesburg Pretoria Academy of Computer Science and Software Engineering University of Johannesburg

Web services that are accessible on mobile devices such as smart phones and tablets are a reality in today's age. Web services hosted on mobile devices consume valuable device resources such as battery power, connectivity to network, and Global Positioning Systems (GPS) availability. In this context, a mobile client consumes web services provisioned by mobile devices, acting as service providers. The purpose of the research is to identify a framework that can possibly improve the efficiency, quality of services and discovery of provisioning web services on mobile devices. The framework considers battery life, message time and size, processing required, availability, reliability, scalability and the discovery of these Web accessible services. By using the framework that enables context-aware services, the efficiency and quality of services can be improved. Discovery of these services are improved by utilizing a hybrid model of both Mobile P2P and JmDNS.

关键词： Mobile handsets Mobile communication Simple object access protocol Quality of service XML Androids

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Semi-supervised learning with local and global consistency by geodesic distance and sparse representation 1

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3rd Sino-Foreign-Interchange Workshop on Intelligent science and Intelligent Data engineering, IScIDE 2012

作者： Gui, Jie Zhao, Zhongqiu Hu, Rongxiang Jia, Wei Intelligent Computing Lab. Hefei Institute of Intelligent Machines Chinese Academy of Sciences Hefei Anhui 230031 China State Key Laboratory for Novel Software Technology Nanjing University China College of Computer Science and Information Engineering Hefei University of Technology China Institue of Energy Safety Chinese Academy of Sciences Hefei Anhui 230031 China

ISBN: (数字)9783642366697

ISBN: (纸本)9783642366680

In many practical data mining applications, such as web categorization, key gene selection, etc., generally, unlabeled training examples are readily available, but labeled ones are fairly expensive to obtain. Therefore, in recent years, semi-supervised learning algorithms such as graph-based methods have attracted much attention. However, most of these traditional methods adopted a Gaussian function to calculate the edge weights of the graph. In this paper, a novel weight for semi-supervised graph-based methods is proposed. The new method adds the label information from problem into the target function, and adopts the geodesic distance rather than Euclidean distance as the measure of the difference between two data points when conducting the calculation. In addition, we also add class prior knowledge from problem into semi-supervised learning algorithm. Here we address the problem of learning with local and global consistency (LGC). It was found that the effect of class prior knowledge was probably different between under high label rate and low label rate. Furthermore, we integrate sparse representation (SR) in LGC algorithm. Experiments on a UCI data set show that our proposed method outperforms the original algorithms. © Springer-Verlag 2013.

关键词： Learning algorithms

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Kinetics and Modeling of Chemical Leaching of Sphalerite Concentrate Using Ferric Iron in a Redox-controlled Reactor

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Chinese Journal of Chemical engineering 2013年第8期21卷 933-936页

作者：宋健高玲林建群吴洪斌林建强 State Key Lab of Microbial Technology Shandong University Department of Pharmacy and Biotechnology Zibo Vocational Institute Shandong Provincial Key Lab for Distributed Computer Software Novel Technology School of Information Science and EngineeringShandong Normal University Institute of Agro-products Processing Science and Technology Xinjiang Academy of Agricultural and Reclamation Science

This work presents a study for chemical leaching of sphalerite concentrate under various constant Fe3+ concentrations and redox potential conditions. The effects of Fe3+ concentration and redox potential on chemical leaching of sphalerite were investigated. The shrinking core model was applied to analyze the experimental results. It was found that both the Fe3+ concentration and the redox potential controlled the chemical leaching rate of sphalerite. A new kinetic model was developed, in which the chemical leaching rate of sphalerite was proportional to Fe3+ concentration and Fe3+ /Fe2+ ratio. All the model parameters were evaluated from the experimental data. The model predictions fit well with the experimental observed values.

关键词： sphalerite leaching kinetic model Fe3＋ concentration redox potential LabVIEW

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Depth-of-Field Rendering with Saliency-Based Bilateral Filtering

Depth-of-Field Rendering with Saliency-Based Bilateral Filte...

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IEEE International Conference on computer-Aided Design and computer Graphics

作者： Weichen Xue Dong Xing Ming Lin Jing Wang Bin Sheng Lizhuang Ma Department of Computer Science & Engineering Shanghai Jiao Tong University Shanghai China State Key Lab. of Computer Science Inst. of Software Chinese Academy of Sciences Beijing China

Depth of Field (DoF) is an indispensable feature of photo realistic rendering and photography retouching. In this paper, we propose an image-based rendering technique which can simulate the depth-of-field effect. The proposed technique can render the depth-of-field effect automatically without any interactions. Compared to the ordinary depth-of-field rendering technique, our algorithm is less time-consuming and needs no additional depth maps to assist the depth-of-field rendering. In our proposed algorithm, the saliency detection technique is employed to simulate the depth information. The flash-based technique is also introduced to promote the final depth-of-field rendering visual effect.

关键词： Rendering (computer graphics) Ash computer vision Image color analysis Data mining Image edge detection

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Efficient public key cryptosystem resilient to key leakage chosen ciphertext attacks 1

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Cryptographers' Track at the RSA Conference 2013, CT-RSA 2013

作者： Liu, Shengli Weng, Jian Zhao, Yunlei Dept. of Computer Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China Department of Computer Science Emergency Technology Research Center of Risk Evaluation and Prewarning on Public Network Security Jinan University China Software School Fudan University Shanghai 201203 China State Key Laboratory of Information Security Institute of Information Engineering Chinese Academy of Sciences Beijing 100093 China Shanghai Key Laboratory of Scalable Computing and Systems Shanghai China

ISBN: (数字)9783642360954

ISBN: (纸本)9783642360947

Leakage-resilient public key encryption (PKE) schemes are designed to resist "memory attacks", i.e., the adversary recovers the cryptographic key in the memory adaptively, but subject to constraint that the total amount of leaked information about the key is bounded by some parameter λ. Among all the IND-CCA2 leakage-resilient PKE proposals, the leakage-resilient version of the Cramer-Shoup cryptosystem (CS-PKE), referred to as the KL-CS-PKE scheme proposed by Naor and Segev in Crypto09, is the most practical one. But, the key leakage parameter λ and plaintext length m of KL-CS-PKE are subject to λ + m ≤ log q - ω(log κ), where κ is security parameter and q is the prime order of the group on which the scheme is based. Such a dependence between λ and m is undesirable. For example, when λ (resp., m) approaches to log q, m (resp., λ) approaches to 0. In this paper, we designed a new variant of CS-PKE that is resilient to key leakage chosen ciphertext attacks. Our proposal is λ ≤ log q - ω(log κ) leakage-resilient, and the leakage parameter λ is independent of the plaintext space that has the constant size q (exactly the same as that in CS-PKE). The performance of our proposal is almost as efficient as the original CS-PKE. As far as we know, this is the first leakage-resilient CS-type cryptosystem whose plaintext length is independent of the key leakage parameter, and is also the most efficient IND-CCA2 PKE scheme resilient to up to log q - ω(log κ) leakage. © 2013 Springer-Verlag.

关键词： Public key cryptography

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Statistical fault localization in decision support system based on probability distribution criterion

Statistical fault localization in decision support system ba...

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Conference of the North American Fuzzy Information Processing Society - NAFIPS

作者： P. Hao Z. Zheng Y. Gao Z. Zhang Department of Automation Science and Electrical Engineering Beihang University Beijing China State Key Laboratory of Computer Science Institute of Software Chinese Academy of Sciences Beijing China

ISBN: (纸本)9781479903467

Finding the location of a fault in code is an important research and practical problem, which often requires much time and manual effort. To automate this time consuming task, a class of predicate-based statistical fault localization techniques have been proposed, which test the similarity of dynamic predicate spectra between non-failed runs and failed runs and suggest suspicious predicates to the programmers to facilitate the identification of faults. However, with the existence of coincidental correctness, how to efficiently and effectively compare the difference of predicate spectra distribution has become a crucial problem to be solved. In this paper, we make use of probability distribution criterion in developing a new statistical fault localization algorithm. Instead of using geometry distance, it calculates the overlapping of dynamic predicate spectra in two communities (non-failed runs and failed runs) to evaluate the difference. Empirical results show that our technique outperforms some representative predicate-based fault localization techniques for localizing faults in most subject programs of the Siemens suite and space program. To facilitate the debugging process and provide visual help to the debugger, we also designed a system software prototype, which integrates many recent fault localization algorithms, including the one proposed in this paper.

关键词： Probability distribution Debugging Prototypes software Fault diagnosis Heuristic algorithms Algorithm design and analysis

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Study on mechanisms of secure data aggregation based on weighted fitting analysis

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Ruan Jian Xue Bao/Journal of software 2013年第SUPPL.1期24卷 108-116页

作者： Li, Ping Yang, Wu Xie, Jin-Yang Zhu, Hong-Song Zhang, Yong-Guang Li, Xiao-Feng School of Computer and Telecommunications Changsha University of Science and Technology Changsha 410114 China State Key Laboratory of Information Security Institute of Information Engineering The Chinese Academy of Sciences Beijing 100093 China Software Development Center Beijing Institute of Control Engineering Beijing 100190 China

Cryptographic approaches are vulnerable to impersonation attacks when nodes become compromised. Meanwhile, trust-based judgment and confirmation of cluster heads in WSN imposes higher communication cost. Trust management and authentication on cluster heads in WSN are essential in research on the mechanisms of secure data aggregation at present. In this paper, an energy attenuation model is adopted to describe event sensing in a kind of WSNs. Approximate evaluation on distance between occurring event and nodes within a cluster is achieved in case the location of the event is not known. Distribution properties of data points with clustering characteristics based on fitting curve construction are theoretically analyzed. In addition, the mechanism on trust authentication on cluster heads is also refined. Experimental results show that the proposed mechanism has much better performance on fitting accuracy and malicious CH recognition than previous works. © 2013 ISCAS.

关键词： Authentication

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