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2009 IEEE Conference on computer Vision and Pattern Recognition, CVPR 2009

作者： Li, Teng Tao, Mei Yan, Shuicheng Kweon, In-So Lee, Chilwoo Dept. of Electrical Engineering KAIST Daejeon Korea Republic of Microsoft Research Asia Beijing China Dept. of Electrical and Computer Engineering National University of Singapore Singapore Singapore Dept. of Electronics and Computer Eng. Chonnam Nat'l Univ Gwangju Korea Republic of

ISBN: (纸本)9781424439935

Most research on image decomposition, e.g. image segmentation and image parsing, has predominantly focused on the low-level visual clues within single image and neglected the contextual information across different images. In this paper, we present a new perspective to image decomposition piloted by the multi-labels associated with individual images. Observing that the context information (i.e., local label representations of the same label are similar while those from different labels are dissimilar) exists across different images, we propose to perform image decomposition in a collective way, and then the image decomposition problem is formulated as an optimization which maximizes inter-label difference and at the same time minimizes intralabel difference of the target label representations. Such contextual image decomposition has a wide variety of applications, among which the two exemplary ones are: 1) multi-label image annotation in which the sparse coding of a query image over the bases consisting of all learned label representations naturally produces the multi-label annotation, and 2) label ranking in which the annotated labels are re-ordered according to the sparse coding coefficients on those learned label representations. It is worth noting that these two applications can be performed simultaneously via the label propagation process in sparse coding. © 2009 IEEE.

关键词： Codes (symbols)

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Joint transmitter and receiver carrier sensing capability of CSMA in MANETs

Joint transmitter and receiver carrier sensing capability of...

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2009 International Conference on Wireless Communications and Signal Processing, WCSP 2009

作者： Kaynia, Mariam Øien, Geir E. Jindal, Nihar Dept. of Electronics and Telecommunications Norwegian Univ. of Science and Technology Trondheim Norway Dept. of Electrical and Computer Engineering University of Minnesota MN United States

ISBN: (纸本)9781424456680

This paper considers the performance of the CSMA protocol with joint transmitter-receiver sensing in a wireless mobile ad hoc network. In our network model, packets belonging to specific transmitters arrive randomly in space and time according to a 3-D Poisson point process, and are then transmitted to their intended destinations using a fully-distributed CSMA MAC protocol. A packet transmission is considered successful if the received SINR is above a predefined threshold for the duration of the packet. Approximate expressions are derived for the outage probability of CSMA, and the role of joint transmitter-receiver sensing is evaluated. Furthermore, the optimal sensing thresholds for both the transmitter and receiver are derived, and shown to yield significant performance improvement. An understanding is established on the inherent hidden and exposed node problems of CSMA, and we illustrate how an optimization of the sensing thresholds can efficiently balance between these two problems. It is shown that the optimal choice for the sensing threshold of the receiver is the communication threshold, whereas the optimal sensing threshold of the transmitter is found numerically as a function of the communication threshold. © 2009 IEEE.

关键词： Carrier sense multiple access

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A stochastic finite-state morphological parser for Turkish

A stochastic finite-state morphological parser for Turkish

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Joint Conference of the 47th Annual Meeting of the Association for Computational Linguistics and 4th International Joint Conference on Natural Language Processing of the AFNLP, ACL-IJCNLP 2009

作者： Sak, Haşim Güngör, Tunga Saraçlar, Murat Dept. of Computer Engineering Boǧaziçi University TR-34342 Bebek Istanbul Turkey Dept. of Electrical and Electronics Engineering Boǧaziçi University TR-34342 Bebek Istanbul Turkey

ISBN: (纸本)9781617382581

This paper presents the first stochastic finite-state morphological parser for Turkish. The non-probabilistic parser is a standard finite-state transducer implementation of two-level morphology formalism. A disambiguated text corpus of 200 million words is used to stochastize the morphotactics transducer, then it is composed with the morphophonemics transducer to get a stochastic morphological parser. We present two applications to evaluate the effectiveness of the stochastic parser;spelling correction and morphology-based language modeling for speech recognition. © 2009 ACL and AFNLP.

关键词： Transducers

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Parallel SAR computations inside human head due to radiation from microstrip antenna using grid portal

Parallel SAR computations inside human head due to radiation...

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2009 International Conference on High Performance Computing, Networking and Communication Systems, HPCNCS 2009

作者： Eldeeb, Hesham Elsadek, Hala Desouky, Maha Abdallah, Haytham Talkhan, Ihab Bagherzadeh, Nader Electronics Research Institute Cairo Egypt Electronics and Communication Dept. Faculty of Engineering Cairo University Cairo Egypt Electrical and Computer Engineering Henri Samuli School of Engineering University of California Irvine Irvine CA United States

ISBN: (纸本)9781615676606

In this paper, a design for a parallel web service portal is proposed During the last three years a group of researchers in electronics Research Institute (ERI) in cooperation with research team at University of California, Irvine (UCI) were working toward building a portal service that based on grid web user interface which facilitates the use of the parallel computation resources. The portal will introduce some services such as matrix multiplication, Fast Fourier transform and one of the important applications is the parallel computations of the Specific Absorption Rate (SAR) inside the human head due to radiation from handheld mobile devices antennas. This application has a great demand due to the vast increase in the wireless communications systems everyday. These systems have a hazard effects on the human body. We have introduced the parallel Finite Difference Time Domain (FDTD) algorithm to give a figure of merit about the health hazard effects of wave radiation on the human head. A rectangular microstrip patch antenna is nearby attached to a human head model, as in many mobile communications practical applications, The FDTD parallel code is to calculate the Specific Absorption Rate (SAR) inside the human head in very short or almost real time. A parallel processing algorithm is applied on cluster/grid parallel platform as well as on 1024 nodes super computer (IBM Blue Gene). The speed up is computed and it is concluded that the parallel algorithm is efficient up to 45 nodes.

关键词： Directional patterns (antenna)

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Determination method for loss minimum configuration considering reconnection of distributed generators

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IEEJ Transactions on Power and Energy 2009年第2期129卷 324-330+9页

作者： Takano, Hirotaka Tomida, Takafumi Hayashi, Yasuhiro Matsuki, Junya Dept. of Electrical and Computer Engineering Gifu National College of Technology 2236-2 Karaimakuwa Motosu 501-0495 Japan Graduate School of Electrical and Electronics Engineering University of Fukui 3-9-1 Bunkyo Fukui 910-8507 Japan

In the field of electrical power system, various approaches, such as utilization of renewable energy, loss reduction, and so on, have been taken to reduce CO2 emission. So as to work toward this goal, the total number of distributed generators (DGs) using renewable energy connected into 6.6 kV distribution system has been increasing rapidly. The DGs can reduce distribution loss by appropriate allocation. However, when a fault occurs such as distribution line fault and bank fault, DGs connecting outage sections are disconnected simultaneously. Since the simultaneous disconnection of DGs influences restoration configuration and normal configuration after the restoration, it is necessary to determine the system configuration in normal state considering simultaneous disconnection of DGs. In this paper, the authors propose a computation method to determine the loss minimum configuration in normal state considering reconnection of DGs after simultaneous disconnection by fault occurrence. The feature of determined loss minimum configuration is satisfying with operational constraints even if all DGs are disconnected from the system. Numerical simulations are carried out for a real scale distribution system model with 252 sectionalizing switches (configuration candidates are 2252) and 120 DGs (total output is 38.46 MW which is 23% of total load) in order to examine the validity of the proposed algorithm. © 2009 The Institute of Electrical Engineers of Japan.

关键词： Restoration

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An analysis of information diffusion in the blog world

An analysis of information diffusion in the blog world

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1st ACM International Workshop on Complex Networks in Information and Knowledge Management, CNIKM'09, Co-located with the 18th ACM International Conference on Information and Knowledge Management, CIKM 2009

作者： Kwon, Yong-Suk Kim, Sang-Wook Park, Sunju Dept. of Electronics and Computer Engineering Hanyang University Seoul Korea Republic of School of Business Yonsei University Seoul Korea Republic of

ISBN: (纸本)9781605588070

In the blog world, bloggers produce information, establish relationships with other bloggers in order to exchange information, and form a blog network, an online social network. In social network theory, information diffusion is said to occur through the relationships of the social network's constituents. Contrary to the social network theory, however, when the history of information diffusion that occurs in the actual blog world is examined, a majority of information spreads between the constituents without any established relationship. Moreover the phenomenon of explosive information diffusion is also observed. Using the real-world blog data, this paper reveals that these two phenomena are related to each other and examines the causes that induce explosive information diffusion. Copyright 2009 ACM.

关键词： Blogs

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Real-time fringe pattern generation with high quality

Real-time fringe pattern generation with high quality

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Digital Holography and Three-Dimensional Imaging, DH 2009

作者： Kang, Hoonjong Yaraš, Fahri Onural, Levent Yoshikawa, Hiroshi Dept. of Electrical and Electronics Engineering Bilkent University 06800 Bilkent Ankara Turkey Dept. of Electronics and Computer Science Nihon University 7-24-1 Narashino-dai Funabashi Chiba 2748501 Japan

A hologram computation procedure and its GPU implementation are presented. The procedure is based on partitioning. Each segment has an approximate but simpler frequency domain representation. Quality of the results is... 详细信息

ISBN: (纸本)9781557528711

关键词： Holograms

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RFID-based information system for preventing medical errors

RFID-based information system for preventing medical errors

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2009 6th Annual International Conference on Mobile and Ubiquitous Systems: Networking and Services, MobiQuitous 2009

作者： Youn, Jong-Hoon Ali, Hesham Sharif, Hamid Chhetri, Biplav Dept. of Computer Science Univ. of Nebraska-Omaha Omaha NE 68182 United States Dept. of Computer Electronics and Engineering Univ. of Nebraska-Lincoln Lincoln NE 68588 United States

ISBN: (纸本)9789639799592

A report by the Institute of Medicine of the National Academy of Sciences estimates that as many as 98,000 people die in U.S. hospitals each year because of medical errors. In this project, we propose an innovative IT-based approach to prevent errors in various medical processes by utilizing advances in Radio Frequency Identification (RFID) and wireless communications. The goal of the study is to perform an in-dept. study of existing RFID technologies for patient care in medical facilities. In the paper, a new system architecture that integrates various wireless technologies such as RFID and Wi-Fi was proposed. In the pilot study, we primarily focused on the limitations and shortcomings of passive RFID technologies in medical settings. Our experimental results show the reliability challenge in the current passive EPC Gen 2 RFID systems for use in a dynamic medical environment.

关键词： Wi-Fi

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DSP structure to motion computation on reconfigurable hardware

DSP structure to motion computation on reconfigurable hardwa...

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Independent Component Analyses, Wavelets, Neural Networks, Biosystems, and Nanoengineering VII

作者： Botella, Guillermo García, Antonio Rodríguez, Manuel Meyer-Baese, Uwe Dept. Computer Architecture Universidad Complutense de Madrid 28040 Madrid Spain Dept. Electronics and Computer Technology University of Granada 18071 Granada Spain Dept. Architecture and and Computer Technology University of Granada 18071 Granada Spain Dept. Electrical and Computer Engineering Tallahassee FL 32310-6046 United States

ISBN: (纸本)9780819476098

Since the world presents a dynamically changing environment, we need synthetic systems that can process and respond to motion. The main contribution of this work is the efficient implementation of a biologically inspired DSP architecture for gradient motion estimation that borrows nature templates as inspiration and makes use of an specific model of human visual motion perception: Multi Channel Gradient Model. This model can be enhanced using psychophysical and bioinspired properties according to biological vision in order to mimic the behavior and the performance of the mammalians. The architecture is designed with an asynchronous pipeline, chaining several signal processing stages. Experimental results and resource consumption are discussed, analyzing the associated customization of the system. This work concludes with several comparisons with the actual contributions and examples for synthetic sequences and real image applications. © 2009 SPIE.

关键词： Real time systems

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Novel directions in Raman amplifier research

Novel directions in Raman amplifier research

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7th International Conference on Information, Communications and Signal Processing, ICICS 2009

作者： Kalavally, V. M., Premaratne I., Rukhlenko T., Win P., Shum M., Tang Dept. of Electrical and Computer Systems Engineering School of Engineering Monash University 2 Jalan Lagoon Selatan Bandar Sunway Selangor 46150 Malaysia Dept. of Electrical and Computer Systems Engineering Faculty of Engineering Monash University Clayton VIC 3800 Australia School of Electrical and Electronics Engineering Nanyang Technological University NTRC XFrontier Block 50 Nanyang Drive Singapore Singapore

ISBN: (纸本)9781424446575

Raman amplifiers provide a simple and yet powerful platform for optical amplification needs in modern optical communication networks. This paper reviews recent progress in Raman amplifier research and highlights some non-conventional future of the field. Although the low-noise and wavelength-independent gain properties of Raman amplifiers have been long exploited in optical communication networks, researchers strive to tap into the huge potential of non-linear optics to improve reach and performance. Alternative approaches used to enhance the quality of Raman amplified networks such as the use of novel pumping schemes that can ensure uniformity in gain and noise performance are discussed. Finally, the advances in research on Raman amplification in monolithically integrated silicon waveguides which should fuel wide deployment in the coming years are presented. ©2009 IEEE.

关键词： Light amplifiers

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