检索结果-内蒙古大学图书馆

IEEE International Conference on Image Processing

作者： Hai Tao R.J. Moorhead NSF Engineering Research Center for Computational Field Simulation Mississippi State University MS USA

A new progressive transmission scheme using spline biorthogonal wavelet bases is proposed in this paper. First, several wavelet bases are compared with the spline biorthogonal wavelet bases. By exploiting the properties of this set of wavelet bases, a fast algorithm involving only additions and subtractions is developed. Due to the multiresolutional nature of the wavelet transform, this scheme is compatible with hierarchical-structured rendering algorithms. The formula for reconstructing the functional values in a continuous volume space is given in a simple polynomial form. Lossless compression is possible, even when using floating-point numbers. When the algorithm is applied to data from a global ocean model, the lossless compression ratio is about 1.5:1. Even with a compression ratio of 50:1, the reconstructed data is still of good quality. Finally, the reconstructed data is rendered using various visualization algorithms and the results are demonstrated.< >

关键词： Propagation losses Wavelet transforms Continuous wavelet transforms Filters Spline Data visualization Decoding Entropy coding computational modeling Oceans

来源：评论

学校读者我要写书评

暂无评论

Macromodeling CMOS circuits for event driven simulation

Macromodeling CMOS circuits for event driven simulation

引用

Annual IEEE International Conference and Exhibit ASIC

作者： J.D. Trotter S. Saripella N. Pidugo D.L. Ledlow D. Kapoor Microsystems Prototyping Laboratory NSF Engineering Research Center for Computational Field Simulation Mississippi State University USA Microsystems Prototyping Lab. Mississippi State Univ. MS USA

Using a piece-wise linear source for modeling the input transitions, the logic delays and output transition times are characterized and accurately macromodeled with errors typically less than 1%. Two different logic levels are used at the 70% and 30% points in the transitions to define the "logic events" to circumvent characterized negative delay times. Input capacitance characterization which includes the Miller effect is described. Comparisons of HSpice simulations versus the event simulations for example logic blocks typically result in differences of less than 10%.< >

关键词： Circuit simulation Discrete event simulation Propagation delay Capacitance Timing Piecewise linear techniques Semiconductor device modeling CMOS logic circuits Equations Power supplies

来源：评论

学校读者我要写书评

暂无评论

ELLIPTIC GRID GENERATION SYSTEM - CONTROL FUNCTIONS REVISITED .1.

引用

APPLIED MATHEMATICS AND COMPUTATION 1993年第2-3期59卷 151-163页

作者： SONI, BK NSF Engineering Research Center for Computational Field Simulation Mississippi State University Mississippi State Mississippi 39762 USA

A methodology for the development of control functions associated with the elliptic grid generation system is presented. This development is based on the optimal blending of the best characteristics of hyperbolic generation system and algebraic techniques. The algorithm is readily applicable to grid adaptation. computational examples are presented to demonstrate the success of this methodology.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Writing libraries in MPI

Writing libraries in MPI

引用

1993 Scalable Parallel Libraries Conference, SPLC 1993

作者： Skjellum, A. Doss, N.E. Bangalore, P.V. Computer Science Department United States NSF Engineering Research Center for Computational Field Simulation Mississippi State University United States

ISBN: (纸本)0818649801

MPI is the new de facto standard for multicomputer and cluster message passing. This short paper describes the issues underlying the development of parallel libraries with MPI. We motivate the need for parallel libraries, and explain why common message-passing systems do not support them. We describe added features needed to support libraries, and what these features are called in MPI. We mention additional features of MPI that support libraries, but which are beyond the scope of this initial paper on this topic. We provide guidelines in terms of "do's" and "don'ts" for would-be MPI library writers. We present a linear algebra library in skeletal form on a two-dimensional virtual topology, including code fragments. We summarize by mentioning related work, and comment on future code development of parallel libraries under MPI as well as porting efforts of existing codes to the system. © 1994 IEEE.

关键词： Libraries

来源：评论

学校读者我要写书评

暂无评论

A VIRTUAL ENVIRONMENT FOR engineering DESIGN EVALUATION AND SCIENTIFIC VISUALIZATION

A VIRTUAL ENVIRONMENT FOR ENGINEERING DESIGN EVALUATION AND ...

引用

CONF ON DEVICE-INDEPENDENT COLOR IMAGING AND IMAGING SYSTEMS INTEGRATION

作者： WEST, JE WEBERG, SD MOORHEAD, RJ NSF Engineering Research Center for Computational Field Simulation Mississippi State University United States Army Corps of Engineers Waterways Experiment Station Vicksburg MS United States

ISBN: (纸本)0819411426

The US Army Engineers Waterways Experiment Station (WES) has been exploring potential uses for virtual environments (VE) in engineering and scientific applications for approximately two years. The initial research involved commercial software which, although it had potential in a variety of application areas, was found to lack specific features and flexibility needed for WES's target applications. The research then concentrated on designing and developing a software system which would provide virtual environment designers at WES and the engineering research center (ERC) a foundation of basic research upon which future development and application systems could be based. In implementing the prototype system many graphical and software techniques and their application toward VE in general were evaluated. Several of these techniques are discussed in terms of performance and effectiveness. A specific application was developed based on the prototype system, and its effectiveness in relating meaningful information to die research scientist is discussed in the body of the paper. Finally, general observations concerning the potency of VE in engineering and scientific visualization are made. © 1993 SPIE. All rights reserved.

关键词： Virtual reality

来源：评论

学校读者我要写书评

暂无评论

NHPDCC: The national high performance distributed computing consortium

NHPDCC: The national high performance distributed computing ...

引用

1993 Scalable Parallel Libraries Conference, SPLC 1993

作者： Briley, W.R. Reese, D.S. Skjellum, A. Turcotte, L.H. NSF Engineering Research Center for Computational Field Simulation Mississippi State University P.O. Box 6176 MS39762 United States

ISBN: (纸本)0818649801

This paper discusses the proposed National High Performance Distributed Computing Consortium (NHPDCC), a second-generation high performance computing consortium. NHPDCC will build high performance computing solutions via distributed, heterogeneous machines with diverse, complementary capabilities. Unlike single-machine consortia, NHPDCC will strive to demonstrate practical solutions to current and future "challenge" and "grand-challenge" applications, by utilizing multi-vendor, commercial products, rather than prototypes. Specific software projects to be implemented by the consortium personnel include MPI message-passing standard and related tools, scalable parallel libraries, benchmarks, as well as systems software. Consortium members will benefit through access to both the hardware and software of the consortium. In addition, the synergy generated by interactions among NHPDCC members will be a significant benefit to consortium members. © 1994 IEEE.

关键词： Message passing

来源：评论

学校读者我要写书评

暂无评论

Unsteady flame spread over solid fuels in microgravity

引用

Advances in Space research 1993年第7期13卷 171-184页

作者： Bullard, D.B. Tang, L. Altenkirch, R.A. Bhattacharjee, S. Department of Mechanical and Nuclear Engineering and NSF Engineering Research Center for Computational Field Simulation Mississippi State University Mississippi State MS 39762 United States Department of Mechanical Engineering San Diego State University San Diego CA 92182 United States

For flame spreading over solid fuels at microgravity in a quiescent environment, experimental, and computational, results show that the spread rate following ignition is steady because the leading edge of the flame itself establishes the flow field into which it spreads. Spreading into an opposing forced flow is inherently unsteady because of the changing character of the boundary-layer flow with location. The development of an unsteady flame spread model is presented and applied to thermally thick polymethylmethacrylate. The unsteady model is constructed such that interfacial phenomena, e.g., fuel surface reradiation, are accounted for as volumetric source terms in differential, conservation equations, so that the solid and gas fields may be treated simultaneously without iteration between phases. Care must be taken such that communication between the solid and gas at the interface is computed accurately. For forced flows with velocity much larger than the spread rate, radiative processes are unimportant, but for the lower flow rates, comparable to the spread rate, the opposite is true. Solutions for a quiescent environment are difficult to obtain. Conduction scales become large, and conduction heat transfer from the flame to the solid is reduced. Because of this, quiescent environment solutions could not be obtained without at least an approximate treatment of gas-phase, flame radiation. © 1993.

关键词：

来源：评论

学校读者我要写书评

暂无评论

NHPDCC: The National High Performance Distributed Computing Consortium

NHPDCC: The National High Performance Distributed Computing ...

引用

Scalable Parallel Libraries Conference

作者： W.R. Briley D.S. Reese A. Skjellum L.H. Turcotte NSF Engineering Research Center for Computational Field Simulation Mississippi State University MS USA

关键词： Distributed computing High performance computing Application software Software prototyping Prototypes Software tools Personnel Software standards Software libraries System software

来源：评论

学校读者我要写书评

暂无评论

Feature extraction for oceanographic data using a 3D edge operator

Feature extraction for oceanographic data using a 3D edge op...

引用

IEEE Conference on Visualization

作者： R.J. Moorehead Z. Zhu NSF Eng. Res. Center for Computational Field Simulation Mississippi State Univ. MS USA NSF Engineering Research Center for Computational Field Simulation Mississippi State University MS USA

The features of greatest interest in ocean modeling in the Gulf of Mexico and along the Gulf Stream are the fronts and eddies. Resolving, modeling, and tracking these eddies over time is of great importance for climatological studies and economic advancement. In this paper we present a novel technique for automatically locating, contouring, and tracking oceanic features such as eddies and fronts. The models and resultant visualizations exhibit excellent correlation with observed data.< >

关键词： Feature extraction Ocean temperature Radar tracking Weather forecasting Economic forecasting computational modeling Power generation economics Data visualization Satellites Power engineering and energy

来源：评论

学校读者我要写书评

暂无评论

Writing libraries in MPI

Writing libraries in MPI

引用

Scalable Parallel Libraries Conference

作者： A. Skjellum N.E. Doss P.V. Bangalore Computer Science Department Mississippi State University USA NSF Engineering Research Center for Computational Field Simulation Mississippi State University USA

关键词： Writing Software libraries Programming profession computational modeling Message passing Guidelines Linear algebra Hardware Data structures Computer science

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：