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20th International Offshore and Polar engineering Conference, ISOPE-2010

作者： Westphalen, J. Greaves, D.M. Hunt-Raby, Alison Williams, C.J.K. Taylor, Paul H. Hu, Z.Z. Omidvar, P. Causon, D.M. Mingham, C.G. Stansby, P.K. Rogers, B.D. PRIMaRE: Peninsula Research Institute for Marine Renewable Energy Department of Marine Science and Engineering University of Plymouth Plymouth United Kingdom Department of Architecture and Civil Engineering University of Bath Bath United Kingdom Department of Engineering Science University of Oxford Parks Road Oxford United Kingdom Department of Computing and Mathematics Manchester Metropolitan University Chester Street Manchester United Kingdom School of Mechanical Aerospace and Civil Engineering University of Manchester Manchester United Kingdom

ISBN: (纸本)9781880653777

During the last years many concepts of wave energy converters (WEC) have been proposed. All are designed to generate energy at competitive economic rates in average sea states and also to survive extreme wave conditions. Due to the complexity of most offshore wave energy devices and their motion response in different sea states, physical tank tests are common practice for WEC design. Full scale tests are also necessary, but are expensive and only considered once the design has been optimised. Computational Fluid Dynamics (CFD) is now recognised as an important complement to traditional physical testing techniques in offshore engineering. Once properly calibrated and validated to the problem, CFD offers a high density of test data and results in a reasonable timescale to assist with design changes and improvements to the device. Within the EPSRC funded research project "Extreme Wave Loading on Offshore Wave Energy Devices: a Hierarchical Team Approach" the two WECs Pelamis and the Manchester Bobber are investigated using different Eulerian and Lagrangian CFD techniques. Both devices float on the water surface and generate the electricity from the motion of the waves. Pelamis' overall movement is limited due to the mooring system, but the individual segments are allowed to move in 6 degrees of freedom and interact with the waves and the adjacent segments. The dynamics of the Manchester Bobber comprise the nominally vertical motion of the floats, which are arranged in an array, and the highly complex interactions between the floats and the waves. Two test cases leading towards simulation of the full dynamics of Pelamis and the Manchester Bobber have been modelled using different CFD techniques. The problems involve the interaction between regular waves and fixed horizontal cylinders of different levels of submergence. Results are compared with experimental data to calibrate the CFD codes. Furthermore, results for the fluid-structure interaction of an oscillating cone o

关键词： Computational fluid dynamics

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Senior-friendly technologies: Interaction design for senior users

Senior-friendly technologies: Interaction design for senior ...

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28th Annual CHI Conference on Human Factors in computing Systems, CHI 2010

作者： Duh, Henry Been-Lirn Do, Ellen Yi-Luen Billinghurst, Mark Quek, Francis Chen, Vivian Hsueh-Hua National University of Singapore Department of Electrical and Computer Engineering 4 Engineering Drive 3 Singapore 117576 Singapore Georgia Institute of Technology College of Architecture School of Interactive Computing 245 Fourth Street Atlanta GA 30332-0155 United States University of Canterbury Human Interface Laboratory Old Maths Building New Zealand Virginnia Tech. Department of Computer Science Center for Human Computer Interaction Blacksburg VA 24061 United States Nanyang Technological University Wee Kim Wee School of Communication and Information 31 Nanyang Link Singapore 637718 Singapore

ISBN: (纸本)9781605589312

The elderly represent a valid group of users who can potentially benefit greatly from engaging with technology, such as healthcare systems or playing digital games. Yet, less attention has been given to the significance of senior citizens as technology users, as compared to the common younger population. In an effort to fill in the gap, this workshop aims to investigate the design of technology for senior citizens. To provide for more focused, thus more productive discussion, we will use elderly mobile phone games as a case in point here. The overarching objective is to understand what can help to make for better and more meaningful use of interactive applications and technology by the elderly, for instance, games on the mobile phone. © 2010 Copyright is held by the author/owner(s).

关键词： Cellular telephones

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Technology parameters of stability in subgrade slope of vegetation

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Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical engineering 2010年第SUPPL. 2期32卷 594-597页

作者： Sun, Hong Wu, Gang Song, Jin-Yan Wang, Yu School of Naval Architecture Ocean and Civil Engineering Shanghai Jiaotong University Shanghai 200240 China Institute for Materials Research School of Computing Science and Engineering University of Salford Manchester United Kingdom

As environmental awareness, widespread attentions are paid to apply vegetation to the embankment slope protection. In China, the theory on ecological protection, which is mainly discussing about the ecological benefit, has a limited research far behind the practical application. The software CHASM used to determine main technology parameters of slope stability and mechanism of ecological slope subjected to rainfall is studied. Small-angle slopes are more stable. Slopes of ψ ≤ 35° are stable with filling soil of ψ=30°, and vegetations have limited influences on slope stability. The safety factors of slopes of filling soil with different strengths increase 10%~12% because of vegetation. For high permeability embankment, the safety factors with trees planting on slope surface are higher than those of slope foot, so removing the trees of slope is relatively safer. For low permeability embankment, vegetations have negative effects on the slope stability. The rainfalls with different intensities will affect the slope stability variously. When rainfall action doesn't exceed the adjustment capacity of vegetation, the safety factor increases, however, reduces significantly when the rainfall operation does.

关键词： Vegetation

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PARBLO:Page-Allocation-Based DRAM Row Buffer Locality Optimization

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Journal of Computer Science & Technology 2009年第6期24卷 1086-1097页

作者：米伟冯晓兵贾耀仓陈莉薛京灵 Key Laboratory of Computer System and Architecture Institution of Computing Technology Chinese Academy of Sciences Graduate University of Chinese Academy of Sciences Programming Languages and Compilers Group School of Computer Science and Engineering University of New South Wales

DRAM row buffer conflicts can increase memory access latency significantly. This paper presents a new pageallocation-based optimization that works seamlessly together with some existing hardware and software optimizations to eliminate significantly more row buffer conflicts. Validation in simulation using a set of selected scientific and engineering benchmarks against a few representative memory controller optimizations shows that our method can reduce row buffer miss rates by up to 76% （with an average of 37.4%）. This reduction in row buffer miss rates will be translated into performance speedups by up to 15% （with an average of 5%）.

关键词： DRAM row buffer page allocation locality optimization

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Building performance simulation in undergraduate multidisciplinary education: Learning from an architecture and engineering collaboration

Building performance simulation in undergraduate multidiscip...

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11th International IBPSA Conference - Building Simulation 2009, BS 2009

作者： Charles, Patrick P. Thomas, Charles R. School of Architecture Art and Historic Preservation Roger Williams University Bristol United States School of Engineering Computing and Construction Management Bristol United States

The paper is concerned with the integration of building performance simulation within a collaborative/ multidisciplinary higher-education environment. The paper presents a semester-long setup in which a course attended by both architecture and engineering students and jointly taught by an architect and an engineer ultimately collaborate with an undergraduate architecture design studio on proposing upgrades to an existing building. As an introductory-level course with building performance simulation (BPS) content, it strives to incorporate other components in addition to the collaborative design one. These other components aimed at grounding the BPS into physical reality are: back-of-the-envelope hand calculations, physical modeling, and data acquisition measurements. The authors find that leaving aside the goal of achieving refined analytical methods of BPS to instead endeavour to establish a proper collaborative framework between BPS consultant and designer (here represented by the course attendee and the studio attendee, respectively) early in the design process delivers interesting results in terms of student understanding of how buildings work.

关键词： Students

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Shape grammars and grammatical evolution for evolutionary design

Shape grammars and grammatical evolution for evolutionary de...

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11th Annual Genetic and Evolutionary Computation Conference, GECCO-2009

作者： O'Neill, Michael Swafford, John Mark McDermott, James Byrne, Jonathan Brabazon, Anthony Shotton, Elizabeth Natural Computing Research and Applications Group University College Dublin Ireland School of Architecture Landscape and Civil Engineering University College Dublin Ireland

ISBN: (纸本)9781605583259

We describe the first steps in the adoption of Shape Grammars with Grammatical Evolution for application in Evolutionary Design. Combining the concepts of Shape Grammars and Genetic Programming opens up the exciting possibility of truly generative design assist tools. In this initial study we provide some background on the adoption of grammar-based Genetic Programming for Evolutionary Design, describe Shape Grammars, and give a brief overview of Grammatical Evolution before detailing how Grammatical Evolution used Shape Grammars to successfully rediscover some benchmark target structures. Copyright 2009 ACM.

关键词： Genetic programming

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Parallelization of the nearest-neighbour search and the cross-validation error evaluation for the kernel weighted k-nn algorithm applied to large data dets in matlab

Parallelization of the nearest-neighbour search and the cros...

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2009 International Conference on High Performance computing and Simulation, HPCS '09

作者： Rubio, Gines Guillen, Alberto Pomares, Hector Rojas, Ignacio Paechter, Ben Glösekötter, Peter Torres-Ceballos, C.I. University of Granada Dept of Computer Architecture and Technology C/ Periodista Daniel Saucedo sn 18071 Granada Spain Centre for Emergent Computing School of Computing Napier University United Kingdom Dept. of Electrical Engineering and CS University of Applied Sciences Muenster Germany

ISBN: (纸本)9781424449071

The kernel weighted k-nearest neighbours (KWKNN) algorithm is an efficient kernel regression method that achieves competitive results with lower computational complexity than Least-Squares Support Vector Machines and Gaussian Processes. This paper presents the parallel implementation on a cluster platform of the sequential KWKNN implemented in Matlab. This implies both the parallelization of the k nearestneighbour search and the evaluation of the crossvalidation error on a large distributed data set. The results demonstrate the good performances of the implementation. © 2009 IEEE.

关键词： Nearest neighbor search

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The prediction of airflow generated noise in ventilation system take-offs

The prediction of airflow generated noise in ventilation sys...

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8th European Conference on Noise Control 2009, EURONOISE 2009

作者： Waddington, David C. Oldham, David J. School of Computing Science and Engineering University of Salford M5 4WT United Kingdom Acoustics Research Unit School of Architecture University of Liverpool L69 3BX United Kingdom

ISBN: (纸本)9781615676804

Earlier work on devising generalised noise prediction techniques for ventilation system elements based upon simple bend configurations has been extended to the study of the noise generated by branch take-offs. A good collapse of normalised data is seen for each component. Furthermore, a single collapsed data curve is proposed for each main/branch diameter ratio for all circular junctions. The results indicate that a method based upon pressure loss characteristics could form the basis of a technique for predicting the airflowgenerated noise due to branch take-offs in circular ductwork. It is not proven that a single universal curve for the prediction of the airflow generated noise due to any duct component exists, but this work lends support to the theory that a range of component specific curves might exist and provide a means of accurately predicting airflow generated noise in ventilation systems.

关键词： Forecasting

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Hybrid finite element and finite volume methods for two immiscible fluid flows

Hybrid finite element and finite volume methods for two immi...

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作者： Aliabadi, Shahrouz Wan, Tian Bigler, Christopher Northrop Grumman Center for High Performance Computing School of Engineering Jackson State University Jackson MS United States Department of Naval Architecture and Marine Engineering University of Michigan Ann Arbor MI United States

ISBN: (纸本)9781563479755

We have successfully extended our implicit hybrid finite element/volume solver to flows involving two immiscible fluids. The solver is based on the segregated pressure correction or projection method on staggered unstructured hybrid meshes. An intermediate velocity field is first obtained by solving the momentum equations with the matrix-free implicit cell-centered finite volume method. The pressure Poisson equation is solved by the node-based Galerkin finite element method for an auxiliary variable. The auxiliary variable is used to update the velocity field and the pressure field. The pressure field is carefully updated by taking into account the velocity divergence field. This updating strategy can be rigorously proven to be able to eliminate the unphysical pressure boundary layer and is crucial for the correct temporal convergence rate. Our current staggered-mesh scheme is distinct from other conventional ones in that we store the velocity components at cell centers and the auxiliary variable at vertices. The fluid-interface is captured by solving an advection equation for the volume fraction of one of the fluids. The same matrix-free finite volume method as the one used for momentum equations is used to solve the advection equation. We will focus on the interface sharpening strategy to minimize the smearing of the interface over time. We have developed and implemented a global mass conservation algorithm which enforces the conservation of the mass for each fluid. Copyright © 2009 by the American Institute of Aeronautics and Astronautics, Inc.

关键词： Finite volume method

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A self-repairable microprocessor

A self-repairable microprocessor

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ISTC/CSTIC 2009 (CISTC)

作者： Xie, Yuanjiang Fu, Xiang He, Zijian Zhao, Yang Hu, Yu Li, Xiaowei Key Laboratory of Computer System and Architecture Chinese Academy of Sciences Beijing 100190 China Institute of Computing Technology Chinese Academy of Sciences Beijing China Graduate School of Chinese Academy of Sciences Beijing 100049 China Department of Computer Science and Engineering University of California Riverside 92521 United States

ISBN: (纸本)9781615676460

With increasing defect density, microprocessors, especially the embedded caches, will encounter more faults. Adding spare resources to replace defective components is a widely accepted method for yield enhancement. In this work, a repair method using content addressable memory combined with spare bits, as well as a novel fault injection method is proposed. With the proposed fault injection technique, various numbers and types of faults can be flexibly injected into the silicon. A wireless sensor network system using our self-repairable microprocessor (SRP) is developed to prove the effectiveness of the proposed technique. ©The Electrochemical Society.

关键词： Wireless sensor networks

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