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Anomaly detection in transactional sequential data

Information Technology Journal 2012年第7期11卷 782-787页

作者： Zhang, Jingwei Lin, Yuming Zhang, Huibing Yang, Qing School of Computer Science and Engineering Guilin University of Electronic Technology Guilin 541004 China Electronic Engineering and Automation Institute Guilin University of Electronic Technology No. 1 Jinji Road Qixing District Guilin 541004 China

A transactional system often has a steady distribution based on their decisions or responses on various transactions. If the system is changed, the distribution also often changes. It is a valuable work to detect anomaly caused by system changes based on different distributions. In this study, we modeled those decision or response signals into a series of time-related distributions and then proposed a method combining distance metrics and anomaly detection to discover whether changes have happened in some systems. Distance metrics on different distributions can decide whether changes have happened and anomaly detection can find what happened further. Extensive experiments show that our method has a good performance and can locate the anomaly accurately. © 2012 Asian Network for Scientific Information.

关键词： Distance metrics Distribution distance Indicator distribution

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A new application with algebraic multigrid method

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Journal of Information and Computational science 2012年第6期9卷 1447-1454页

作者： Huang, Ying Xie, Mei Li, Weisheng Lai, Jun Wang, Kuangsheng School of Electronic Engineering University of Electronic Science and Technology of China Chengdu 610054 China Chongqing Key Lab. of Computer Network and Communication Technology Chongqing 400065 China Institute of Computer Science and Technology Chongqing University of Posts and Telecommunications Chongqing 400065 China

Algebraic Multi-grid (AMG) method is analyzed and is combined with the graph cut method to extract the texture feature of the image. AMG method can extract more information about the singularities in the image. The data in the coarse grid is utilized to reconstruct the image and the reconstruct result approximates to the original image well. On the basis of the analysis on the AMG method, an energy function is constructed for the texture feature and minimized using max-flow method. Experimental results show that the proposed method can extract more texture details accurately. © 2012 by Binary Information Press.

关键词： Image reconstruction

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An Improved Hybrid Sensor Schedule for Remote State Estimation under Limited Communication Resources

An Improved Hybrid Sensor Schedule for Remote State Estimati...

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IEEE Annual Conference on Decision and Control

作者： Junfeng Wu Karl Henrik Johansson Ling Shi Department of Electronic and Computer Engineering Hong Kong University of Science and Technology ACCESS Linnaeus Center School of Electrical Engineering Royal Institute of Technology

ISBN: (纸本)9781467320658

In this paper, we consider remote state estimation. A sensor locally processes its measurement data and sends its local estimate to a remote estimator for further processing. Due to the limited communication resources, the sensor can only communicate with the estimator for a pre-specified number within a given horizon. We propose a hybrid sensor data schedule which introduces an event-triggering mechanism on top of an optimal offline sensor schedule. This hybrid schedule, having a small implementation cost, leads to a smaller estimation error at the remote estimator when compared with the optimal offline sensor schedule.

关键词： State estimation communication resources Sensors Remote measurement data HYBRID Hybrid electric vehicles OFF LINE

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A Mutual Authentication Protocol in RFID Using CRC and Variable Certification Key

A Mutual Authentication Protocol in RFID Using CRC and Varia...

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2012 International Conference on Affective Computing and Intelligent Interaction(ICACII 2012)

作者： Sejin Oh Juseok Shin Cheolho Jeong Jaekang Lee Sungsoo Kim Seungwoo Lee Kwangseon Ahn Graduate School of Electrical Engineering and Computer Science Kyungpook National UniversityKorea Electronics and Telecommunications Research Institute Korea School of Electronic Engineering Kyungnam UniversityKorea

An RFID system is data transmission technology to use radio ***,it has many problems like eavesdropping,location tracking,spoofing attack and replay *** research has being progress about cryptography and mutual authentication to resolve these *** many studies,previously proposed protocols were vulnerable to *** this paper,we proposed RFID protocol using CRC code and variable certification *** protocol safely encrypts data on wireless and prevents various attacks by mutual authentication using CRC *** addition,our protocol is secure in various attacks than past protocol and is efficient in computation.

关键词： RFID Protocol Mutual Authentication Hash Function CRC

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Polymer extrusion process monitoring using nonlinear dynamic model-based PCA

Polymer extrusion process monitoring using nonlinear dynamic...

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UKACC International Conference on Control (CONTROL)

作者： Xueqin Liu Kang Li Marion McAfee Jing Deng School of Electronics Electrical Engineering and Computer Science Queens University of Belfast Belfast UK Department of Mechanical and Electronic Engineering Institute of Technology Sligo Sligo Ireland

Polymer extrusion is one of the final forming stages in the production of many polymeric products in a variety of applications. It is also an intermediate processing step in injection moulded, blown film, thermo-formed, and blow moulded products. However, polymer extrusion is a complex process which is difficult to set up, monitor, and control. As a consequence, high levels of off- specification products and long down-times are the problems facing the plastics industry. This paper proposes a new method for fault detection of the polymer extrusion processes, where the nonlinear finite impulse response (NFIR) model and principal component analysis (PCA) are integrated to form a nonlinear dynamic model-based PCA monitoring scheme. Here the NFIR model is used to capture the nonlinearity and dynamics of the extrusion process. The residuals resulting from the difference between the model predicted outputs and process outputs are then analyzed by PCA to detect process faults. The experimental results confirm the efficacy of the proposed model-based PCA approach for fault detection of polymer extrusion processes.

关键词： Principal component analysis Monitoring Nonlinear dynamical systems Polymers Predictive models data models Computational modeling

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Task mapping techniques for embedded many-core SoCs

Task mapping techniques for embedded many-core SoCs

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International SoC Design Conference, ISOCC

作者： Junya Kaida Takuji Hieda Ittetsu Taniguchi Hiroyuki Tomiyama Yuko Hara-Azumi Koji Inoue Department of Electronic and Computer Engineering Ritsumeikan University Japan Graduate School of Information Science Nara Institute of Science and Technology Japan Department of Advanced Information Technology Kyushu University Japan

This paper proposes static task mapping techniques for embedded many-core SoCs. The proposed techniques take into account both task and data parallelisms of the tasks in order to efficiently utilize the potential parallelism of the many-core architecture. Two approaches are proposed for static mapping: one approach is based on integer linear programming and the other is based on a greedy algorithm. In addition, a static mapping technique considering dynamic task switching is proposed. Experimental results show the effectiveness of the proposed techniques.

关键词： Tiles Parallel processing System-on-a-chip Switches Multicore processing Greedy algorithms Runtime

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Adaptation of the concept hierarchy model with search logs for query recommendation on intranets 12

Adaptation of the concept hierarchy model with search logs f...

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35th Annual ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2012

作者： Adeyanju, Ibrahim Adepoju Song, Dawei Albakour, M-Dyaa Kruschwitz, Udo De Roeck, Anne Fasli, Maria IDEAS Research Institute Robert Gordon University St Andrews Street Aberdeen AB25 1HG United Kingdom School of Computer Science Tianjin University China Department of Computing Open University United Kingdom School of Computer Science and Electronic Engineering University of Essex Colchester C04 3SQ United Kingdom Centre for Research in Computing Open University Walton Hall Milton Keynes MK7 6AA United Kingdom

ISBN: (纸本)9781450316583

A concept hierarchy created from a document collection can be used for query recommendation on Intranets by ranking terms according to the strength of their links to the query within the hierarchy. A major limitation is that this model produces the same recommendations for identical queries and rebuilding it from scratch periodically can be extremely inefficient due to the high computational costs. We propose to adapt the model by incorporating query refinements from search logs. Our intuition is that the concept hierarchy built from the collection and the search logs provide complementary conceptual views on the same search domain, and their integration should continually improve the effectiveness of recommended terms. Two adaptation approaches using query logs with and without click information are compared. We evaluate the concept hierarchy models (static and adapted versions) built from the Intranet collections of two academic institutions and compare them with a state-of-the-art log-based query recommender, the Query Flow Graph, built from the same logs. Our adaptive model significantly outperforms its static version and the query flow graph when tested over a period of time on data (documents and search logs) from two institutions' Intranets. © 2012 ACM.

关键词： Intranets

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An effective strategy for mining frequent itemsets from uncertain dataset

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Journal of Convergence Information Technology 2012年第17期7卷 190-196页

作者： Liang, Shengbin Jiang, Binbin Wang, Le Zhang, Rui First Author School of Software Engineering Henan University China School of Software Nanyang Institute of Technology China School of Computer Science and Technology Faculty of Electronic Information and Electrical Engineering Dalian University of Technology China Daqing Oilfield Engineering Limited Corporation China

Mining frequent itemsets from uncertain datasets is an emerging research in the field of data mining;it differs from traditional frequent itemset mining in that each item in an uncertain dataset has a probability value associated with it. Existing algorithms in this field uses candidate generating and processing approaches to discover the frequent itemsets iteratively, but the number of candidates might be enormously huge and hence it is the bottleneck of the mining process. To reduce the number of candidates, we propose a strategy by adopting a weight value to decrease the estimated expected support of an itemset. We apply our strategy to the state of the art algorithm MBP to get a revised algorithm we call RMBP. The performance of RMBP was evaluated in comparison with MBP on sparse and dense datasets. Experimental results show that the algorithm RMBP outperforms the algorithm MBP in terms of running time and memory.

关键词： data mining

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Societally connected multimedia across cultures

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Frontiers of Information Technology & electronic engineering 2012年第12期13卷 875-880页

作者： Zhongfei ZHANG Tao MEI Nicu SEBE Yonghong TIAN Vincent S.TSENG Qing WANG Changsheng XU Huimin YU Shiwen YU Zhengyou ZHANG Ramesh JAIN Yueting ZHUANG Noshir CONTRACTOR Alexander G.HAUPTMANN Alejandro (Alex)JAIMES Wanqing LI Alexander C.LOUI Department of Information Science & Electronic Engineering Zhejiang University Hangzhou 310027 China Microsoft Research Asia China Department of Information Engineering and Computer Science University of Trento Italy Institute of Computational Linguistics Peking UniversityBeijing 100871 China Institute of Computer Science and Information National Cheng Kung University Taiwan 701 Tainan School of Computer Science Northwestern Polytechnical University Xi'an 710129 China Institute of Automation Chinese Academy of Sciences Beijing 100080 China Institute of Computational Linguistics Peking University Beijing 100871 China Microsoft Research Redmond WA USA Department of Computer Science University of California IrvineCA USA College of Computer Science and Technology Zhejiang UniversityHangzhou 310027 China School of Communication Northwestern University Evanston ILUSA Informedia Group CMU Pittsburgh PA Yahoo! Research Spain School of Computer Science and Software Engineering University of Wollongong NSW Australia Kodak Research Labs USA

The advance of the Internet in the past decade has radically changed the way people communicate and collaborate with each other. Physical distance is no more a barrier in online social networks, but cultural differences (at the individual, community, as well as societal levels) still govern human-human interactions and must be considered and leveraged in the online world. The rapid deployment of high-speed Internet allows humans to interact using a rich set of multimedia data such as texts, pictures, and videos. This position paper proposes to define a new research area called ‘connected multimedia’, which is the study of a collection of research issues of the super-area social media that receive little attention in the literature. By connected multimedia, we mean the study of the social and technical interactions among users, multimedia data, and devices across cultures and explicitly exploiting the cultural differences. We justify why it is necessary to bring attention to this new research area and what benefits of this new research area may bring to the broader scientific research community and the humanity.

关键词： Connected multimedia Social media Socialcultural constraint

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TD-LTE eNodeB prototype using general purpose processor

TD-LTE eNodeB prototype using general purpose processor

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2012 7th International ICST Conference on Communications and Networking in China, CHINACOM 2012

作者： Kai, Niu Jianxing, Sun Kuilin, Chen Chai, Kok Keong Key Laboratory of Universal Wireless Communications Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 China China Mobile Research Institute No.53A Xibianmennei Ave Xuanwu District Beijing 10053 China School of Electronic Engineering and Computer Science Queen Mary University of London London United Kingdom

ISBN: (纸本)9781467326995

This paper presents a LTE eNodeB signal processing prototype on commodity PC architectures. LTE is one of the major B3G wireless communication systems with large throughput. Meanwhile, general purpose processor (GPP) techniques such as single instruction multi data technique, cache technique and many other effective techniques are developing rapidly in recent years. Thus, we apply Nehalem, one of the primary commodity PC architectures of Intel, to achieve the LTE eNodeB signal processing functions. We complete our single-core version test and reveal that the GPP platform has great potential for the development of real-time wireless signal systems. © 2012 IEEE.

关键词： Signal processing

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