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Linear Subspace Learning via Sparse Dimension Reduction

Linear Subspace Learning via Sparse Dimension Reduction

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International Joint Conference on Neural Networks

作者： Ming Yin Yi Guo Junbin Gao School of Automation Guangdong University of Technology CSIRO Mathematics Informatics and Statistics School of Computing and Mathematics Charles Sturt University

ISBN: (纸本)9781479914821

Linear Subspace Learning (LSL) has been widely used in many areas of information processing, such as dimensionality reduction, data mining, pattern recognition and computer vision. Recent years have witnessed several excellent extensions of PCA in LSL. One is the recent L1-norm maximization principal component analysis (L1Max-PCA), which aims at learning linear subspace efficiently. L1Max-PCA simply simulates PCA by replacing the covariance with the so-called L1-norm dispersion in the mapped feature space. However, it is difficult to give an intuitive interpretation. In this paper, a novel subspace learning approach based on sparse dimension reduction is proposed, which enforces the sparsity of the mapped data to better recover cluster structures. The optimization problem is solved efficiently via Alternating Direction Method (ADM). Experimental results show that the proposed method is effective in subspace learning.

关键词： Subspace learning L1-norm Principal component analysis (PCA) Alternating Direction Method

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Verifying strategies in dialogue games 23

Verifying strategies in dialogue games

引用

23th International Workshop on Concurrency, Specification and Programming, CS and P 2014

作者： Sawicka, Anna Kacprzak, Magdalena Dziubiński, Marcin Budzynska, Katarzyna Faculty of Computer Science Polish-Japanese Institute of Information Technology Poland Faculty of Computer Science Bialystok University of Technology Poland Institute of Informatics University of Warsaw Poland Institute of Philosophy and Sociology Polish Academy of Sciences Poland School of Computing University of Dundee United Kingdom

The aim of the paper is to consider a game-theoretic properties of strategies available to players in dialogue games. We treat speech acts formulated in a dialogue as moves in a dialogue game and rules for their appropriateness as rules of this game. We would like to analyze dialogical systems as a Nash-style games, and explore verification possibilities for some properties of such games e.g. dominant strategies and Nash equilibrium. Since automatic verification of such games could be of high complexity, we consider a model checking approach, which is commonly applied method allowing for verification of different systems and their properties. This method is based on solutions, which are trying to deal with the state explosion problem.

关键词： Game theory

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An efficient cluster-based communication protocol for wireless sensor networks

An efficient cluster-based communication protocol for wirele...

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作者： Bajaber, Fuad Awan, Irfan IT Department Faculty of Computing and Information Technology King Abdulaziz University P.O. Box 80187 Jeddah 21589 Saudi Arabia Networks and Performance Engineering Research Group School of Computing Informatics and Media University of Bradford Bradford West Yorkshire BD7 1DP United Kingdom

A wireless sensor network is a network of large numbers of sensor nodes, where each sensor node is a tiny device that is equipped with a processing, sensing subsystem and a communication subsystem. The critical issue in wireless sensor networks is how to gather sensed data in an energy-efficient way, so that the network lifetime can be extended. The design of protocols for such wireless sensor networks has to be energy-aware in order to extend the lifetime of the network because it is difficult to recharge sensor node batteries. We propose a protocol to form clusters, select cluster heads, select cluster senders and determine appropriate routings in order to reduce overall energy consumption and enhance the network lifetime. Our clustering protocol is called an Efficient Cluster-Based Communication Protocol (ECOMP) for Wireless Sensor Networks. In ECOMP, each sensor node consumes a small amount of transmitting energy in order to reach the neighbour sensor node in the bidirectional ring, and the cluster heads do not need to receive any sensed data from member nodes. The simulation results show that ECOMP significantly minimises energy consumption of sensor nodes and extends the network lifetime, compared with existing clustering protocol. © 2013 Springer Science+Business Media New York.

关键词： Sensor nodes

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Computational identification of De-centric genetic regulatory relationships from functional genomic data

Computational identification of De-centric genetic regulator...

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10th International Symposium on Bioinformatics Research and Applications, ISBRA 2014

作者： Yue, Zongliang Wan, Ping Xie, Zhan Chen, Jake Y. Institute of Biopharmaceutical Informatics and Technology Wenzhou Medical University Wenzhou Zhejiang Province China School of Informatics and Computing Indiana University Indianapolis IN 46202 United States Indiana Center for Systems Biology and Personalized Medicine Indiana University Indianapolis IN 46202 United States Bioinformatics Lab Capital Normal University Beijing China

ISBN: (纸本)9783319081700

We developed a new computational technique to identify de-centric genetic regulatory relationship candidates. Our technique takes advantages of functional genomics data for the same species under different perturbation conditions, therefore making it complementary to current computational techniques including database search, clustering of gene expression profiles, motif matching, structural modeling, and network effect simulation methods. It is fast and addressed the need of biologists to determine activation/inhibition relationship details often missing in synthetic lethality or chip-seq experiments. We used GEO microarray data set GSE25644 with 158 different mutant genes in S. cerevisiae. We screened out 83 targets with 610 activation pairs and 93 targets with 494 inhibition pairs. In the Yeast Fitness database, 33 targets (40%) with 126 activation pairs and 31 targets (33%) with 97 inhibition pairs were identified. To be identified further are 50 targets with 484 activation pairs and 62 targets with 397 inhibition pairs. The aggregation test confirmed that all discovered de-centric regulatory relationships are significant from random discovery at a p-value=0.002;therefore, this method is highly complementary to others that tend to discover hub-related regulatory relationships. We also developed criteria for rejecting genetic regulator candidates x as a candidate regulator and assessing the ranking of the regulator-target relationship identified. The top 10 high suspected regulators determined by our criteria were found to be significant, pending future experimental verifications. © 2014 Springer International Publishing Switzerland.

关键词： Yeast

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An online multi-object tracking by detection approach based on particle filtering framework 14

An online multi-object tracking by detection approach based ...

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2014 Conference on Research in Adaptive and Convergent Systems, RACS 2014

作者： Wang, Zhenhai Hong, Kicheon Informatics School Linyi University Linyin Shandong China Shandong Provincial Key Laboratory of Network Intelligent Computing Technology China Dept. of Information and Telecommunications Engineering University of Suwon Bongdam-eup Hwaseong-si Gyeonggi-do Korea Republic of

ISBN: (纸本)9781450330602

In this paper, we address the problem of automatically detecting and tracking a variable number of persons in complex scenes using a monocular, potentially moving, uncalibrated camera. We propose a novel approach for multi-object tracking by detection in a particle filtering framework. First, in order to improve detection performance, moving objects are automatically extracted using boosting factor and labeling method. Then, multiple objects are tracked in particle filtering framework by adaptively selecting block template according to human model and adaptively updating template using current detection. Finally, we resolve the data association using Hungarian assignment algorithm and compute the observation likelihood function of each particle filter using the associated detection. We present a new method to deal with the variety of the number of objects at random times. The resulting algorithm robustly tracks a variable number of dynamically moving objects in complex scenes with occlusions. The approach relies only on i nformation from the past and is suitable for online application, and does not require any camera or ground plane calibration. We evaluate the performance on a variety of datasets and show that it improves upon state-of-the-art methods. © 2014 ACM.

关键词： Cameras

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The benchmark data set CeTReS.B-MI for in vitro mitosis detection 11

The benchmark data set CeTReS.B-MI for in vitro mitosis dete...

引用

2014 IEEE 11th International Symposium on Biomedical Imaging, ISBI 2014

作者： Becker, T. Kanje, W. Rapoport, D. Thierbach, K. Scherf, N. Roeder, I. Madany Mamlouk, A. Fraunhofer Institution for Marine Biotechnology Lübeck Germany Graduate School for Computing in Medicine and Life Sciences University of Lübeck Germany Institute for Neuro- and Bioinformatics University of Lübeck Germany Institute for Medical Informatics and Biometry Dresden University of Technology Germany

ISBN: (纸本)9781467319591

Mitosis detection poses a major challenge in cell tracking as mitoses are crucial events in the construction of genealogical trees. Making use of typical mitotic patterns that can be seen in phase contrast images of time lapse experiments, we propose a new benchmark data set CeTReS.B-MI consisting of mitotic and non-mitotic cells from the publicly accessible, fully labeled data set CeTReS.B. Using this data, two simple mitosis detectors (based on compactness and intensity) are used exemplarily to train, test and compare their ability to detect mitotic events. As a gold standard, we propose a linear support vector machine (SVM), which is able to separate the classes with a high accuracy (AUC=0.993). To illustrate the potential impact of a robust mitosis detection, the proposed classifiers are combined with two state of the art cell tracking algorithms. For both algorithms, performance does change when adding mitosis detection. Finally, this evaluation also emphasizes how easy implementation and comparison becomes, having suitable benchmark data at hand. © 2014 IEEE.

关键词： Support vector machines

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An alignment-free fingerprint bio-cryptosystem based on modified Voronoi neighbor structures

An alignment-free fingerprint bio-cryptosystem based on modi...

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作者： Yang, Wencheng Hu, Jiankun Wang, Song Stojmenovic, Milos School of Engineering and Information Technology University of New South Wales at the Australia Defence Force Academy Canberra ACT 2600 Australia School of Engineering and Mathematical Sciences La Trobe University VIC 3086 Australia Department of Informatics and Computing Singidunum University Belgrade Serbia

Bio-cryptography is an emerging security technology which combines cryptography with biometrics. A good bio-cryptosystem is required to protect the privacy of the relevant biometric data as well as achieving high recognition accuracy. Fingerprints have been widely used in bio-cryptosystem design. However, fingerprint uncertainty caused by distortion and rotation during the image capturing process makes it difficult to achieve a high recognition rate in most bio-cryptographic systems. Moreover, most existing bio-cryptosystems rely on the accurate detection of singular points for fingerprint image pre-alignment, which is very hard to achieve, and the image rotation transformation during the alignment process can cause significant singular point deviation and minutiae changes. In this paper, by taking full advantage of local Voronoi neighbor structures (VNSs), e.g. local structural stability and distortion insensitivity, we propose an alignment-free bio-cryptosystem based on fixed-length bit-string representations extracted from modified VNSs, which are rotation- and translation-invariant and distortion robust. The proposed alignment-free bio-cryptosystem is able to provide strong security while achieving good recognition performance. Experimental results in comparison with most existing alignment-free bio-cryptosystems using the publicly-available databases show the validity of the proposed scheme. © 2013 Elsevier Ltd. All rights reserved.

关键词： Cryptography

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Estimating packet reception rate in noisy environments

Estimating packet reception rate in noisy environments

引用

IEEE Conference on ALocal Computer Networks Workshops (LCN Workshops)

作者： James Brown Utz Roedig Carlo Alberto Boano Kay Römer School of Computing and Communications Lancaster University Lancaster United Kingdom Institute for Technical Informatics Graz University of Technology Graz Austria

ISBN: (纸本)9781479937851

For the design of dependable and efficient wireless sensor networks it is essential to estimate the achievable packet reception rate (PRR) in the deployment environment. Making such estimation is not trivial as packet delivery success depends on the level of interference present in the deployment area. In this work we show that it is possible to obtain a meaningful representation of the expected interference levels at the target location by measuring the probability distribution function of idle period lengths, and use this to estimate PRR before network deployment. We show how a probability distribution function of idle period lengths can be measured using off-the-shelf sensor nodes. We illustrate how to exploit this methodology to estimate PRR in dependence of the used packet length, and show that relatively short measurement periods provide enough data to obtain accurate *** carry out an extensive experimental evaluation showing that Wi-Fi interference can be captured using this method which allows PRR predictions in such Wi-Fi interference setting with an average error of only 3.2%.

关键词： Interference IEEE 802.11 Standards Wireless sensor networks Estimation Length measurement Probability density function Accuracy

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Scene radiance estimation from human corneal reflections

Scene radiance estimation from human corneal reflections

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Imaging Systems and Applications, ISA 2014

作者： Tominaga, Shoji Ohtera, Ryo Nishi, Shogo Graduate School of Advanced Integration Science Chiba University Inage-ku Chiba-shi Chiba 263-8522 Japan Graduate School of Information Technology Kobe Institute of Computing Chuo-ku Kobe 650-0001 Japan Department of Engineering Informatics Osaka Electro-Communication University Neyagawa Osaka 572-8530 Japan

ISBN: (纸本)9781557523082

A method is proposed for estimating spectral radiances of the surrounding scene from a reflected image on the corneal surface. A digital color camera and the human eyeball are used to develop a simple imaging system without any specific device. The corneal image consists of a mixture of specular and diffuse reflections from the cornea and the iris. The desired scene radiances are only recovered from the specular reflection component after removing the diffuse reflection component. Experiments are executed in several different conditions. © 2014 OSA.

关键词： Imaging systems

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A data collection approach for Mobile Botnet analysis and detection

A data collection approach for Mobile Botnet analysis and de...

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IEEE Symposium on Wireless technology and Applications (ISWTA)

作者： Meisam Eslahi Mohammad Reza Rostami H. Hashim N. M. Tahir Maryam Var Naseri Faculty of Computing Engineering & Technology Asia Pacific University of Technology & Innovation Malaysia Faculty of Electrical Engineering Universiti Teknologi MARA Advanced Informatics School University Technology Malaysia

Recently, MoBots or Mobile Botnets have become one of the most critical challenges in mobile communication and cyber security. The integration of Mobile devices with the Internet along with enhanced features and capabilities has made them an environment of interest for cyber criminals. Therefore, the spread of sophisticated malware such as Botnets has significantly increased in mobile devices and networks. On the other hand, the Bots and Botnets are newly migrated to mobile devices and have not been fully explored yet. Thus, the efficiency of current security solutions is highly limited due to the lack of available Mobile Botnet datasets and samples. As a result providing a valid dataset to analyse and understand the Mobile botnets has become a crucial issue in mobile security and privacy. In this paper we present an overview of the current available data set and samples and we discuss their advantages and disadvantages. We also propose a model to implement a mobile Botnet test bed to collect data for further analysis.

关键词： Mobile communication Malware Mobile handsets Mobile computing Command and control systems Servers

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