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22nd International Conference on Data engineering Workshops, ICDEW 2006

作者： Zhao, Na Chen, Shu-Ching Shyu, Mei-Ling Distributed Multimedia Information System Laboratory School of Computing and Information Sciences Florida International University MiamiFL33199 United States Department of Electrical and Computer Engineering University of Miami Coral GablesFL33124 United States

ISBN: (纸本)0769525717

The dream of pervasive multimedia retrieval and reuse will not be realized without incorporating semantics in the multimedia database. As video data is penetrating many information systems, the need for database support for video data evolves. Hence, we propose an innovative database modeling mechanism called Hierarchical Markov Model Mediator (HMMM) which integrates lowlevel features, semantic concepts, and high-level user perceptions for modeling and indexing multiple-level video objects to facilitate temporal pattern retrieval. Different from the existing database modeling methods, our approach carries a stochastic and dynamic process in both search and similarity calculation. In the retrieval of semantic event patterns, HMMM always tries to traverse the right path and therefore it can assist in retrieving more accurate patterns quickly with lower computational costs. Moreover, HMMM supports feedbacks and learning strategies, which can proficiently assure the continuous improvements of the overall performance. © 2006 IEEE.

关键词： Semantics

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Localized microarchitecture-level voltage management

Localized microarchitecture-level voltage management

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IEEE International Symposium on Circuits and systems (ISCAS)

作者： YongKang Zhu D.H. Albonesi Department of Electrical and Computer Engineering University of Rochester Rochester NY USA Computer System Laboratory Cornell University Ithaca NY USA

Diminishing voltage margins, coupled with power and temperature constraints, call for microarchitecture-level runtime mechanisms for voltage control. This paper describes a localized approach for dynamic voltage management within the domains of a globally asynchronous, locally synchronous (GALS) processor design. Dynamic voltage scaling at this fine grain level permits effective temperature management with less performance impact than global voltage control

关键词： Microarchitecture Voltage control Frequency Microprocessors Dynamic voltage scaling Temperature control Costs Packaging Clocks Power system management

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Resilient P2P anonymous routing by using redundancy

Resilient P2P anonymous routing by using redundancy

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International Workshop on Networking, Architecture, and Storages (IWNAS)

作者： Yingwu Zhu Department of Computer Science & Software Engineering Distributed System Laboratory (DSL) Seattle University Seattle WA USA

One hurdle to using peer-to-peer networks as anonymizing networks is churn. Node churn makes anonymous paths fragile and short-lived: failures of a relay node disrupt the path, resulting in message loss and communication failures. To make anonymous routing resilient to node failures, we use a simple yet powerful idea based on message redundancy by erasure coding and path redundancy to mask node failures. We present an allocation of erasure-coded message segments among multiple paths that provides a guideline on how to maximize routing resilience upon different node availabilities in real-world systems. Our approach allows a tradeoff between routing resilience and bandwidth usage. We show that our approach greatly improves routing resilience while only incurring a moderate bandwidth overhead

关键词： Routing Peer to peer computing Resilience Relays Multicast protocols Bandwidth Telecommunication traffic Public key Cryptography Laboratories

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Multi-rate transmissions on SAC-OCDMA system using new enhancement double-weight (EDW) codes 2

Multi-rate transmissions on SAC-OCDMA system using new enhan...

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2nd International Conference on Information and Communication Technologies: From Theory to Applications, ICTTA 2006

作者： Hasoon, Feras N. Aljunid, S.A. Abdullah, Mohamad Khazani Shaari, Sahbudin Faculty of Information Science and Technology Multimedia Universit Melaka Malaysia Department of Computer and Communication System Faculty of Engineering University Putra Malaysia UPM Serdang43400 Malaysia Photonics Technology Laboratory Institute of Micro Engineering and Nanoelectronics Universiti Kebangsaan Malaysia UKM Bangi Selangor43600 Malaysia

ISBN: (纸本)0780395212

This paper presents a new code structure and its ability in supporting multiple transmission rates in point to point Spectral Amplitude Coding- Optical Code Division Multiple Access (SAC-OCDMA) links. The Double-Weight (DW) code family that has a basic fixed weight of 2 was proposed. Enhancement Double Weight (EDW) Code is a DW code family variation that has variable weight of greater than one. The ability of EDW codes to support simultaneous transmissions at different bit rates is shown through simulated results of the bit error rate (BER) and the eye patterns. Three EDW encoded channels were used at the bit rates of 2.5Gbps and 10Gbps. EDW code shown here significantly performs better than Hadamard and Modified Frequency Hopping (MFH) codes. © 2006 IEEE.

关键词： Bit error rate

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Magnetoresistance effect, Magnetism, and Microstructure in Co-Au Granular Alloy Films Produced By Pulsed Electrochemical deposition

Magnetoresistance effect, Magnetism, and Microstructure in C...

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National Association for Surface Finishing Annual Technical Conference 2006, SUR/FIN 2006

作者： Rizal, C.S. Department of Electrical and Electronic Engineering Muroran Institute of Technology Mizumoto-cho Muroran-shi Hokkaido 050 Japan Nano-System Laboratory Department of Electrical and Computer Engineering University of British Columbia Kaiser Building Vancouver V6T 1Z4 Canada

ISBN: (纸本)9781627481885

This paper discusses the relationship among the magneto-resistance (MR), magnetic properties, and microstructure of the Co-Au granular alloy prepared by pulsed electrochemical deposition. It is shown that MR ratio of the Co-Au single layer (100 nm) film deposited at the current density of 5 mA/cm2 increases with increasing Co concentration in the film and reaches a maximum of 4.4% at 40 at %Co. It is observed that both the MR ratio and grain sizes in the films are dependent on the current density values.

关键词： Microstructure

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FDEWS 2.0: A Web-GIS-based early warning system for fish disease via water quality management

FDEWS 2.0: A Web-GIS-based early warning system for fish dis...

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6th World Congress on Intelligent Control and Automation, WCICA 2006

作者： Nan, Li Zetian, Fu Boqi, Wang Xiaoshuan, Zhang College of Engineering China Agricultural University Beijing China College of Resources and Environment China Agricultural University Beijing China Key Laboratory for Modern Precision Agriculture System Integration China Agricultural University Beijing China Key Laboratory for Computer Information Management Technology Suzhou University Jiangsu China

ISBN: (纸本)1424403324

The water quality is the most vital factor in a successfully healthy aquaculture. After investigation by 415 fish disease cases and experiments, it is found that eutrophication and the pollutants of NH3, H 2S as well as heavy metals and organic compounds are the main reasons of inducing fish disease in the north of China. Generally speaking, an early warning system for fish disease based on water management is a cheaper and alternative choice available for the fish farmers to warn the risks and to minimize disease problems. A Web-GIS-based fish disease early-warning system (FDEWS 2.0) based on water quality management has been developed by us. Building a water quality monitoring network in the aquafarm and integrating a series of simulation models with the GIS and the World-Wide-Web (WWW) are the key advantages of this system. © 2006 IEEE.

关键词： Living systems studies

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A robust object shape prediction algorithm in the presence of white Gaussian noise

A robust object shape prediction algorithm in the presence o...

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International Conference on Multimedia Modeling (MMM)

作者： M. Khansari H.R. Rabiee M. Asadi M. Ghanbari Digital Media Laboratory Computer Engineering Department Sharif University of Technology Iran Department of Electronics System Engineering University of Essex UK

This paper presents a shape prediction algorithm in a noisy video sequence based on pixel representation in the undecimated wavelet domain. In our algorithm for tracking of user-defined shapes in a noisy sequence of images, the amplitude of coefficients in the best basis tree expansion of the undecimated wavelet packet transform are used as feature vectors (FVs). FVs robustness against noise has been achieved through inherent denoising and edge component separation in the best basis selection algorithm. The algorithm uses these FVs to track the pixels of small square blocks located at the vicinity of the object boundary. Searching for the best-matched block has been performed using conventional block matching algorithm in the wavelet domain. Our experimental results show that the algorithm is robust to noise in case of object's shape translation, rotation and/or scaling and can be used to track both rigid and non-rigid shapes in image sequences

关键词： Noise robustness Shape Prediction algorithms Gaussian noise Noise shaping Wavelet domain Video sequences Noise level Wavelet packets Wavelet transforms

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Diakoptics in Shipboard Power system Simulation

Diakoptics in Shipboard Power System Simulation

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Annual North-American Power Symposium

作者： Fabian M. Uriarte Karen L. Butler-Purry Power System Automation Laboratory of the Electrical and Computer Engineering Department Texas A and M University College Station TX USA

ISBN: (纸本)1424402271

A partitioning scheme for transient simulation of shipboard power systems (SPS) is presented. Using diakoptics, the piecewise transient solution to a ungrounded AC-radial (3phi) ring-bus system is found. Cable tie-lines (floating pi-segments) on the SPS ring are converted to hexagon equivalents by discretization and decoupled via source-transportation, diakoptics, and exploiting mutual-susceptance links. Transient simulation results from circuit simulation (as a whole) and via diakoptics (piecewise) are compared and discussed.

关键词： Diakoptics Power system simulation Power system transients Computational modeling computer simulation Circuit simulation Mathematical model Analytical models Power cables Equations

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Derivation of the Korteweg-Helmholtz Electric and Magnetic Force Densities Including Electrostriction and Magnetostriction from the Quasistatic Poynting's Theorems

Derivation of the Korteweg-Helmholtz Electric and Magnetic F...

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Conference on Electrical Insulation and Dielectric Phenomena, (CEIDP)

作者： Markus Zahn Department of Electrical Engineering and Computer Science and the Laboratory for Electromagnetic and Electronic System Massachusetts Institute of Technology Cambridge MA USA

The Korteweg-Helmholtz electric and magnetic force densities for quasistatic systems including the Coulomb-Lorentz force density on free charge and free currents; polarization and magnetization force densities; and electrostriction and magnetostriction force densities are derived from Poynting's theorem. In this derivation, stationary frame linear constitutive laws are used for dielectric, magnetic, and ohmic conducting media with dielectric permittivity epsiv(rho) and magnetic permeability mu( rho), which can be functions of mass density rho, itself a function of position and time, and sigma is the ohmic conductivity which can be space and time varying. Using the quasistatic Galilean transformations for electric and magnetic field variables with conservation of mass and Poynting's theorem, results give a modified Poynting vector, differing from the usual Emacr times Hmacr by a compressibility term, but with the usual electroquasistatic and magnetoquasistatic energy densities, power dissipation density, and Korteweg-Helmholtz force densities straight forwardly derived.

关键词： Magnetic forces Electrostriction Magnetostriction Dielectrics Polarization Magnetization Permittivity Permeability Conductivity Space stations

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Block-based logical hierarchical cluster for distributed multimedia architecture on demand server

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Journal of Shanghai University(English Edition) 2006年第2期10卷 127-133页

作者：熊旭辉余胜生周敬利 National Storage System Laboratory Department of Computer Science and Engineering Huazhong University of Science and Technology Wuhan 430074 P.R. China

A structure of logical hierarchical cluster for the distributed multimedia on demand server is proposed. The architecture is mainly composed of the network topology and the resource management of all server nodes. Instead of the physical network hierarchy or the independent management hierarchy, the nodes are organized into a logically hieraxchical cluster according to the multimedia block they caches in the midderware layer. The process of a member joining/leaving or the structure adjustment cooperatively implemented by all members is concerned with decentralized maintenance of the logical cluster hierarchy. As the root of each logically hierarchical cluster is randomly mapped into the system, the logical structure of a multimedia block is dynamically expanded across some regions by the two replication policies in different load state respectively. The local load diversion is applied to fine-tune the load of nodes within a local region but belongs to different logical hierarchies. Guaranteed by the dynamic expansion of a logical structure and the load diversion of a local region, the users always select a closest idle node from the logical hierarchy under the condition of topology integration with resource management.

关键词： logical hierarchical cluster early replication instantaneous replication local load diversion constrained server selection.

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