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INFOCOM 2008: 27th IEEE communications Society Conference on computer communications

作者： Liu, Xin Wei, Wei Qiao, Chunming Wang, Ting Hu, Weisheng Guo, Wei Wu, Min-You Department of Computer Science and Engineering SUNY Buffalo NY 14260 United States NEC Laboratories America Princeton NJ 08540 United States State Key Lab. of Advanced Optical Communication Systems and Networks SJTU Shanghai 200030 China

ISBN: (纸本)9781424420261

Data-intensive Grid applications require huge data transferring between multiple geographically separated computing nodes where computing tasks are executed. For a future WDM network to efficiently support this type of emerging applications, traditional approaches to establishing lightpaths between given source destination pairs are not sufficient because a computing task may be executed on any one of several computing nodes having the necessary resources. Therefore, lightpath establishment has to be considered jointly with task scheduling to achieve best performance. In this paper, we study the optimization problems of jointly scheduling both computing resources and network resources. We first present the formulation of two optimization problems with the objectives being the minimization of the completion time of a job and minimization of the resource usage/cost to satisfy a job with a deadline respectively. When the objective is to minimize the completion time, we devise an optimal algorithm for a special type of applications. Furthermore, we propose efficient heuristics to deal with general applications with either optimization objective and demonstrate their good performances via simulation. © 2008 IEEE.

关键词： Optimization

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How to enhance UDDI with dependability capabilities

How to enhance UDDI with dependability capabilities

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32nd Annual IEEE International computer Software and Applications Conference, COMPSAC 2008

作者： Gorbenko, Anatoliy Romanovsky, Alexander Kharehenko, Vyacheslav Department of Computer Systems and Networks National Aerospace University KhAI 17 Chkalov Str. Kharkiv 61070 Ukraine School of Computing Science Newcastle University Newcastle upon Tyne NE1 7RU United Kingdom

ISBN: (纸本)9780769532622

How dependability is to be assessed and ensured during Web Service operation and how unbiased and trusted mechanisms supporting this are to be developed are still open issues. This paper addresses the following questions: who should publish dependability parameters, in which way they should be distributed, and who (and how) should monitor these parameters in the global Service-Oriented Architecture. We discuss several techniques of on-line dependability monitoring and measurement, which extend the UDDI (Universal Description, Discovery and Integration) Business Registry with dependability metadata publishing and monitoring capabilities. The paper also proposes UDDI add-ons and light-weight user-side mechanisms for public operational and exceptional reporting. © 2008 IEEE.

关键词： Information services

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Resonance between free space light and waveguide TM mode via surface plasmon wave

Resonance between free space light and waveguide TM mode via...

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International Nano-Optoelectronics Workshop (i-NOW)

作者： Guangyuan Li Anshi Xu State Key Laboratory of Advanced Optical Communication Systems & Networks (Peking University) School of Electronics Engineering and Computer Science Peking University Beijing China

Resonance between free space light and waveguide TM mode via surface plasmon wave is reported for the first time. Simulations show that the beaming angle of the excited free space light can be controlled.

关键词： Optical waveguides Indexes Optical films Metals Aerospace electronics Surface waves Finite element methods

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A Two-Ring Access Network Operated by Crossbar-Enabled OLTs: Cost-Effective Robust Protection in Broadband Access networks

A Two-Ring Access Network Operated by Crossbar-Enabled OLTs:...

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Optical Fiber communication (OFC) Conference

作者： Anpeng Huang Biswanath Mukherjee State Key Laboratory on Advanced Optical Communication Systems and Networks Peking University Beijing China Department of Computer Science University of California Davis CA USA

For protecting an OLT failure or mixed failures cost-effectively in access networks, we connect two single-ring access architectures into a network by using optical crossbar switching technology in which crossbar-enab... 详细信息

ISBN: (纸本)9781557528599

关键词： Robustness Protection Optical fiber networks Optical network units Costs Telecommunication network reliability Proposals computer science Optical fiber communication computer architecture

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Inbuilt-Burstification Urgency-Driven Scheduling (iBUS) Algorithm for Packet Transport in IP-over-WDM networks

Inbuilt-Burstification Urgency-Driven Scheduling (iBUS) Algo...

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IEEE International Conference on communications (ICC)

作者： A. Huang B. Mukherjee State Key Laboratory of Advanced Optical Communication Systems & Networks Peking University Beijing China Department of Computer Science University of California Davis CA USA

With emerging applications in packet-transport networks such as IP-over-WDM networks (e.g., eBanking), packets need to be delivered within a bounded delay (i.e., given deadlines) with high probability. To satisfy such requirement, we propose an Inbuilt-Burstification Urgency-driven Scheduling (iBUS) Algorithm in IP-over-WDM networks. In this approach, packets are assembled into bursts according to their destinations by a preset timer. The timing burstification can reduce the amount of contentions, and support deadline constraints. Then all assembled bursts need to be scheduled efficiently with the deadline constraint. We introduce the concept of urgency degree as a scheduling metric. Bursts are scheduled according to their urgency degrees so that utilization of available network resources can be maximized under the constraint of deadlines. We also study a high-level variant of our algorithm, beta -iBUS, where the parameter beta is used to truncate the acceptable range of urgency degrees [0, 1] into [0, beta ] (where beta les 1) so that invalid scheduling caused by high urgency degrees can be minimized. Simulation experiments demonstrate that our proposal can achieve limited loss probabilities with the constraint of bounded delay.

关键词： Scheduling algorithm Proposals Timing Telecommunication traffic Assembly Traffic control Delay Processor scheduling Internet WDM networks

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Ultra broadband SOI binary blazed grating mirror

Ultra broadband SOI binary blazed grating mirror

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IEEE International Conference on Group IV Photonics

作者： Huaming Wu Yi Wang Junbo Feng Yao Chen Jin Hou Dingshan Gao Zhiping Zhou Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan Hubei China Laboratory on Advanced Optical Communication Systems and Networks Peking University Beijing China School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA USA

A novel SOI grating mirror based on thin binary blazed grating layer is presented. The binary blazed grating mirror (BBGM) has the characteristics of ultra broadband reflection spectrum, high reflectivity and large an... 详细信息

ISBN: (纸本)9781424417698

关键词： Gratings Mirrors Reflectivity Optimized production technology Broadband communication Reflection System-on-a-chip

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Low loss sharp bend for silicon nanophotonic slow-light waveguide

Low loss sharp bend for silicon nanophotonic slow-light wave...

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IEEE International Conference on Group IV Photonics

作者： Huaxiang Yi Yi Wang Junbo Feng Yao Chen Zhiping Zhou Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan Hubei China State Key Laboratory on Advanced Optical Communication Systems and Networks Peking University Beijing China School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA USA

A low loss sharp bend is proposed and analyzed in the slow-light waveguide which is consisted of a series of silicon nanopillars. More than 90% of transmission over 100 nm bandwidth is obtained.

ISBN: (纸本)9781424417698

A low loss sharp bend is proposed and analyzed in the slow-light waveguide which is consisted of a series of silicon nanopillars. More than 90% of transmission over 100 nm bandwidth is obtained.

关键词： Optical waveguides Silicon Optical buffering Optical resonators Dispersion Optical losses Optical coupling

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IMAGE-DEPENDENT SPATIAL SHAPE-ERROR CONCEALMENT

IMAGE-DEPENDENT SPATIAL SHAPE-ERROR CONCEALMENT

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2008 9th International Conference on Signal Processing(ICSP’2008)

作者： Ferdous A.Sohel Gour C.Karmakar Laurence S.Dooley School of Computer Science & Software Engineering University of Western AustraliaWA-6009Australia Gippsland School of Information Technology Monash UniversityVictoria-3842Australia Department of Communication and Systems The Open UniversityMilton KeynesMK7 6AAUnited Kingdom

Existing spatial shape-error concealment techniques are broadly based upon either parametric curves that exploit geometric information concerning a shape's contour or object shape statistics using a combination of Markov random fields and maximum a posteriori *** categories are to some extent,able to mask errors caused by information loss,provided the shape is considered independently of the image/*** palpably however,do not afford the best solution in applications where shape is used as metadata to describe image and video *** paper presents a novel image-dependent spatial shape-error concealment(ISEC) algorithm that uses both image and shape information by employing the established rubber-band contour detecting function,with the novel enhancement of automatically determining the optimal width of the band to achieve superior error *** results qualitatively and numerically corroborate the enhanced performance of the new ISEC strategy compared with established shape-based concealment techniques.

关键词： image IMAGE-DEPENDENT SPATIAL SHAPE-ERROR CONCEALMENT

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Audio-Visual Speech Processing Framework for Lip Reading

Audio-Visual Speech Processing Framework for Lip Reading

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International Conference on Information and communication Technologies: From Theory to Applications, ICTTA

作者： Abdulbaset M. Nasr Abd Rahman Ramli Mohammad Hamiruce Shamala K Subramaniam Robotics Lab Institute of advanced technology Universiti Putra Malaysia Serdang Selangor Darul Ehsan Malaysia Department of Computer and Communications Systems Faculty of Engineering Universiti Putra Malaysia Serdang Selangor Darul Ehsan Malaysia Department of Electrical and Electronics Engineering Faculty of Engineering Universiti Putra Malaysia Serdang Selangor Darul Ehsan Malaysia Department of Communication Technology & Networks Faculty of Computer Science and Information Technology Universiti Putra Malaysia Serdang Selangor Darul Ehsan Malaysia

It is well known that speech production and perception process is inherently bimodal consisting of audio and visual components. Recently there has been increased interest in using the visual modality in combination with the acoustic modality for improved speech processing. This field of study has gained the title of audio-visual speech processing. Lip movement recognition, also known as lip reading, is a communication skill which involves the interpretation of lip movements in order to estimate some important parameters of the lips that include, but not limited to, size, shape and orientation. In this paper, we represent a hybrid framework for lip reading which is based on both audio and visual speech parameters extracted from a video stream of isolated spoken words. The proposed algorithm is self-tuned in the sense that it starts with an estimations of speech parameters based on visual lip features and then the coefficients of the algorithm are fine-tuned based on the extracted audio parameters. In the audio speech processing part, extracted audio features are used to generate a vector containing information of the speech phonemes. These information are used later to enhance the recognition and matching process. For lip feature extraction, we use a modified version of the method used by F. Huang and T. Chen for tracking of multiple faces. This method is based on statistical color modeling and the deformable template. The experiments based on the proposed framework showed interesting results in recognition of isolated words.

关键词： Speech processing Image processing Parameter estimation Data mining Feature extraction Robots computer networks systems engineering and theory communications technology computer science

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Constructing compact Markov processes for correlated workload modeling

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PAMM 2008年第1期7卷

作者： Armin Heindl Miklós Telek Computer Networks and Communication Systems Department of Computer Science University of Erlangen-Nuremberg D-91058 Erlangen Germany Department of Telecommunications Technical University of Budapest H-1521 Budapest Hungary

Unnecessarily large submodels aggravate the state-space explosion problem for large Markov models. The orders of these submodels may multiplicatively flow into the size of the overall model quickly leading to intractable state spaces. To mitigate this effect, compact and correlated Markov processes, in particular Markovian arrival processes (MAPs) of low order, have been developed, which can be used for workload modeling. Different ways how to construct MAPs from information on marginal moments and the correlation structure are addressed with pointers to the relevant literature. A canonical form for MAPs of second-order is presented. (© 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

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