检索结果-内蒙古大学图书馆

Lattice Boltzmann method for phase‐separating liquid‐vapor systems

AIP Conference Proceedings 2005年第1期762卷 626-631页

作者： Victor Sofonea Giuseppe Gonnella Antonio Lamura *Laboratory for Numerical Simulation and Parallel Computing in Fluid Mechanics Centre for Fundamental and Advanced Technical Research Romanian Academy Bd. Mihai Viteazul 24 RO — 300223 Timişoara Romania †Istituto Applicazioni Calcolo CNR Sezione di Bari Via Amendola 122/D 70126 Bari Italy **Dipartimento di Fisica Università di Bari Sezione di Bari Via Amendola 173 I ‐ 70126 Bari Italy ‡INFN Sezione di Bari Via Amendola 173 I ‐ 70126 Bari Italy

In this paper introduce a finite difference lattice Boltzmann model capable to describe the hydrodynamics and the phase separation of a two‐dimensional liquid‐vapor system. A numerical scheme involving flux limiter techniques is proposed to minimize spurious numerical effects. We report some simulation results of the spinodal decomposition process and we find evidence of two different growth regimes depending on the system viscosity.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Double-constrained optimization of optical component selection problem using genetic elitism and double string coding

Double-constrained optimization of optical component selecti...

引用

International Conference on Numerical simulation of Optoelectronic Devices, (NUSOD)

作者： M.A. Dallaali M. Premaratne Advanced Computing and Simulation Laboratory (AXL) Department of Electrical and Computer Systems Engineering Monash University Clayton VIC Australia

The genetic elitism and double string coding were used to solve the optical component problem. For the first time, two constraints were applied where both were combined together using a merging function. The results s... 详细信息

关键词： Optical devices Attenuation Constraint optimization Cost function Genetic mutations Computational modeling Computer simulation Laboratories Genetic engineering Systems engineering and theory

来源：评论

学校读者我要写书评

暂无评论

Algorithmic-Parameter optimization of a parallelized split-step fourier transform using a modified BSP cost model 04

引用

Proceedings of the Second international conference on Parallel and Distributed Processing and Applications

作者： Elankovan Sundararajan Malin Premaratne Shanika Karunasekera Aaron Harwood Department of Computer Science and Software Engineering The University of Melbourne Carlton Victoria Australia Advanced Computing and Simulation Laboratory Department for Electrical and Computer System Engineering Monash University Clayton Victoria Australia

ISBN: (纸本)9783540241287

Adaptive algorithms are increasingly acknowledged in leading parallel and distributed research. In the past, algorithms were manually tuned to be executed efficiently on a particular architecture. However, interest has shifted towards algorithms that can adapt themselves to the computational resources. A cost model representing the behavior of the system (i.e. system parameters) and the algorithm (i.e algorithm parameters) plays an important role in adaptive parallel algorithms. In this paper, we contribute a computational model based on Bulk Synchronous Parallel processing that predicts performance of a parallelized split-step Fourier transform. We extracted the system parameters of a cluster (upon which our algorithm was executed) and showed the use of an algorithmic parameter in the model that exhibits optimal behavior. Our model can thus be used for the purpose of self-adaption.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Algorithmic-parameter optimization of a parallelized split-step Fourier transform using a modified BSP cost model

Lecture Notes in Computer Science (including subseries Lectu...

引用

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2004年 3358卷 233-244页

作者： Sundararajan, Elankovan Premaratne, Malin Karunasekera, Shanika Harwood, Aaron Department of Computer Science and Software Engineering University of Melbourne ICT Building 111 Barry Street Carlton Vic. 3053 Australia Advanced Computing and Simulation Laboratory Department for Electrical and Computer System Engineering Monash University Clayton Vic. 3800 Australia

关键词： Adaptive algorithms

来源：评论

学校读者我要写书评

暂无评论

Finite-difference lattice Boltzmann model with flux limiters for liquid-vapor systems

引用

Physical Review E 2004年第4期70卷 046702-046702页

作者： V. Sofonea A. Lamura G. Gonnella A. Cristea Dipartimento di Fisica Università di Bari Via Amendola 173 70126 Bari Italy Laboratory for Numerical Simulation and Parallel Computing in Fluid Mechanics Center for Fundamental and Advanced Technical Research Romanian Academy Boulevard Mihai Viteazul 24 300223 Timişoara Romania Istituto Applicazioni Calcolo CNR Sezione di Bari Via Amendola 122∕D 70126 Bari Italy TIRES Center of Innovative Technologies for Signal Detection and Processing and INFM Unità di Bari and INFN Sezione di Bari Via Amendola 173 70126 Bari Italy

In this paper we apply a finite difference lattice Boltzmann model to study the phase separation in a two-dimensional liquid-vapor system. Spurious numerical effects in macroscopic equations are discussed and an appropriate numerical scheme involving flux limiter techniques is proposed to minimize them and guarantee a better numerical stability at very low viscosity. The phase separation kinetics is investigated and we find evidence of two different growth regimes depending on the value of the fluid viscosity as well as on the liquid-vapor ratio.

关键词： Phase separation

来源：评论

学校读者我要写书评

暂无评论

Optimizing GridFTP through dynamic right-sizing 03

Optimizing GridFTP through dynamic right-sizing

引用

International Symposium on High Performance Distributed computing

作者： S. Thulasidasan Wu-chun Feng M.K. Gardner Los Alamos National Laboratory Basic and Applied Simulation Science (CCS-5) Los Alamos NM USA Advanced Computing Laboratory (CCS-1) Los Alamos National Laboratory Los Alamos NM USA

ISBN: (纸本)9780769519654

In this paper, we describe the integration of dynamic right-sizing - an automatic and scalable buffer management technique for enhancing TCP (transport control protocol) performance - into GridFTP, a subsystem of the Globus Toolkit for managing bulk data transfers across computational Grids. Such Grids are often characterized by networks with large bandwidth-delay products. Unfortunately, many of today's Grid applications use only a small fraction of available bandwidth because the default buffer sizes in TCP are tuned for yesterday's WAN (wide access network) speeds. Buffer sizes can be manually tuned to allow TCP flow control to adapt to high-speed WAN environments, but this is a tedious process. Although recent work has shown how to automatically tune system buffers during connection set-up, these values may not be appropriate for the connection's lifetime due to varying network delay and throughput. We show how using the technique of dynamic right-sizing (DRS) in GridFTP helps us optimize memory usage while maintaining high throughput over the lifetime of the connection. We also show how DRS enhances important GridFTP features such as striped and third-party data transfers in a scalable way. The technique is implemented entirely in user space so that end users do not have to modify the kernel.

关键词： Distributed computing Chromium

来源：评论

学校读者我要写书评

暂无评论

Lattice Boltzmann model for magnetic fluid interfaces

引用

The European Physical Journal B - Condensed Matter and Complex Systems 2001年第1期20卷 141-149页

作者： V. Sofonea W.-G. Früh Laboratory for Numerical Simulation and Parallel Computing in Fluid Mechanics Centre for Fundamental and Advanced Technical Research Romanian Academy Bd. Mihai Viteazul 24 1900 Timişoara Romania RO Department of Mechanical and Chemical Engineering James Nasmyth Building Heriot-Watt University Riccarton Edinburgh EH14 4AS Scotland UK GB

A Lattice Boltzmann model is developed to account for the competition between surface tension and dipolar interaction in magnetic fluids. The description of the interactions was kept as simple as possible to identify and isolate the nature of the essential interactions in the examined situations. The model is used thereafter in order to simulate the deformation of a magnetic fluid drop under the action of an external magnetic field, as well as the onset of the normal field instability in magnetic fluids. The success of the model, and easily identified deviations, demonstrate that the model is a powerful and versatile tool for the study of magnetic and nonmagnetic fluid systems with interfaces.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Opportunities for international technology transfer in the Pacific Rim in digital technologies

Opportunities for international technology transfer in the P...

引用

Annual Hawaii International Conference on System Sciences (HICSS)

作者： W.H. Mermagen F. Adler R.L. Post Director Advanced Simulation and High Performance Computing Directorate U.S. Army Research Laboratory Aberdeen MD USA Technology Transfer Office U.S. Army Research Laboratory Adelphi MD USA High Performance Technologies Inc. Reston VA USA

The U.S. Army Research laboratory (ARL) and other U.S. Government laboratories are placing substantially increased emphasis on moving technology into their facilities. This reflects the reality that considerable state-of-the-art research done in private sector laboratories is increasingly relevant to a variety of government missions, both defense and civilian. ARL has recently initiated a long term program to develop increased technology interchange in the broad area of digital technologies with individuals and institutions in Pacific Rim countries. Much of the ARL effort in the near term will be focused on increasing technical interchange in a number of settings (e.g. conferences, workshops personnel exchanges) with a longer term goal of developing specific cooperative efforts. Such technology interchange can also be leveraged by developing a research network on the World Wide Web with supporting databases-a "Pacific Rim Research Net" leveraging international research efforts in selected areas. Electronically assisted networks using a combination of workshops and electronic collaboration technology (e.g. Web servers) facilitated in the U.S. are being used successfully by several international research communities. We believe that such a network, initially focusing on digital technologies, could have a strongly catalyzing effect on non-proprietary/unclassified research conducted by government, industry and academia in the U.S. and other Pacific Rim countries. Along with a description of our current approach on international technology transfer this paper presents some of our exploratory ideas for developing longer term structures for communication and cooperation-including a Pacific Rim Research Net.

关键词： Technology transfer Laboratories US Government High performance computing Strontium Computational modeling Personnel Web sites Databases Collaborative work

来源：评论

学校读者我要写书评

暂无评论

PARALLEL AND DISTRIBUTED TLM COMPUTATION WITH SIGNAL-PROCESSING FOR ELECTROMAGNETIC-FIELD MODELING

引用

INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS 1995年第3-4期8卷 169-185页

作者： SO, PPM ESWARAPPA, C HOEFER, WJR NSERC/MPR Teltech Research Chair in RF Engineering Department of Electrical and Computer Engineering University of Victoria Victoria British Columbia V8W 3P6 Canada Poman So received his B.Sc. degree in computer science and physics from the University of Toronto Toronto Onatario Canada in 1985. He obtained his B.A. Sc. and M.A.Sc. degrees in electrical engineering (summa cum laude) from the University of Ottawa Ottawa Ontario Canada in 1987 and 1989 respectively. Mr So was a research engineer in the University of Ottawa from January 1989 to October 1991 his research interests included CAD techniques of microwave circuits and numerical methods for electromagnetic wave modelling. He specialized in the development of electromagnetic engineering CAD software and successfully implemented a number of electromagnetic wave simulators based on the two-dimensional and three-dimensional transmission-line matrix methods. From August 1990 to February 1991 he accompanied Professor W. J. R. Hoefer to Rome Italy and Sophia Antiopolas France. During that time he implemented a parallel version of the 3D-TLM simulator for the CM-2 Connection Machine using C-Star and X Windows Library. He is a research engineer and a Ph.D. student at the University of Victoria Victoria British Columbia Canada. He ported the 2D- and 3D-TLM simulators to DECmpp 1200 massively parallel computer using MPL C and C++. He also combined OSA90/hope a commercially available microwave CAD program with a 2D-TLM simulation module for geometry optimization using the Datapipe technique of OSA90/hope. Recently he has developed a distributed client-server computing technique for the TLM method this technique could accelerate the TLM simulation by more than an order of magnitude. Channabasappa Eswarappa received the M.Tech. degree in electrical engineering from the Indian Institute of Technology Kanpur India in 1983 and Ph. D. degree from the University of Ottawa Canada in 1990. He worked as an Assistant Executive Engineer and later as

This paper describes the implementation of transmission-line matrix (TLM) method algorithms on a massively parallel computer (DECmpp 12000), the technique of distributed computing in the UNIX environment, and the combination of TLM analysis with Prony's method as well as with autoregressive moving average (ARMA) digital signal processing for electromagnetic field modelling. By combining these advanced computation techniques, typical electromagnetic field modelling of microwave structures by TLM analysis can be accelerated by a few orders of magnitude.

关键词： Mathematical models

来源：评论

学校读者我要写书评

暂无评论

NAVAL COASTAL SYSTEMS laboratory - UNIQUE INSITU TEST AND EVALUATION SITE

引用

NAVAL ENGINEERS JOURNAL 1978年第2期90卷 119-129页

作者： JOLLIFF, JV CALLAHAN, CM USN Capt. James V. Jolliff USNgraduated from the U. S. Naval Academy in 1954. Following graduation he served in the USS S. N. Moore (DD—747) and USS Cimarron (AO—22). He received his MS degrees in Naval Architecture from Webb Institute of Naval Architecture and in Financial Management from The George Washington University. He culminated his education at The Catholic University of America where he was awarded his Doctorate in Ocean Engineering in 1972. Capt. Jolliff has served in Naval Shipyards as Ship Superintendent Assistant Repair Officer and Assistant Planning & Estimating Superintendent and as such was primarily concerned with the repair and conversion of U. S. Navy skips. In addition he has served as Maintenance Officer Staff of Commander Mine Force U. S. Pacific Fleet as Co—Chairman of the Naval Engineering Division Engineering Department U. S. Naval Academy and as CV Design Manager in the Advanced Concepts Division and as Head Ship Survivability Office Naval Ship Engineering Center. An active member of ASNE since 1966 he has served as a member of the National Council and is currently the Chairman of the Journal Committee. He has had several papers presented at ASNE Day and published in the Journal and in 1976 was one of the recipients of the ASNE President's Award. At the present time he is assigned as the Commanding Officer Naval Coastal Systems Laboratory (NCSL) Panama City Fla. Mr. Casville M. Callahanis a native of Southwest Virginia where he attended Elementary and Secondary School prior to his three year's service in the U. S. Navy during World War II. He graduated from Lincoln Memorial University Harrogate Tenn. in 1950 receiving his BS degree in Mathematics. In 1952 he received his MS degree in Mathematics from Auburn University Auburn Ala. and taught mathematics at Lincoln Memorial University and at Florida State University Tallahassee Fla. prior to joining the staff of the Mine Defense Laboratory in 1955. He has progressed through a variety of assignments as the Labo

Test and Evaluation have become paramount in today's Department of Defense acquisition process. Therefore, the U. S. Navy requires both private and public facilities to accomplish the final goals of the “Fly before Buy” concept. Such a facility exists at the Naval Coastal Systems laboratory (NCSL); an integral part of the Chief of Naval Material's, Director of Navy Laboratories organization. This paper briefly addresses the laboratory, its mission, and its history. This is followed by an in—depth facilities overview in order to create an understanding of the slow but steady evolution of NCSL's unique fixed facilities. These facilities, when coupled to the local natural environment, provide a unique in situ test and evaluation capability which is unequalled in the United States for assessing seagoing coastal systems. Of prime consideration is the Range Date Acquisition Center (RADAC) and Its ancillary subsystems for tracking, environmental monitoring, communications, and post run analysis. The paper is concluded with a discussion of both past and present use of the aforementioned facilities with an emphasis on user acceptance and future potential growth.

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：