检索结果-内蒙古大学图书馆

4th conference on Developments in X-Ray Tomography

作者： De Carlo, F Tieman, B Argonne Natl Lab Adv Photon Source Argonne IL 60439 USA

ISBN: (纸本)0819454737

X-ray microtomography is rapidly becoming the tool of choice for three-dimensional (3D) imaging of thick structures at the 1-10 mum scale. The fast microtomography system developed at beamline 2-BM of the Advanced Photon Source (APS) is a new class of instrument offering near video-rate acquisition of tomographic data combined with pipelined processing, reconstruction, and visualization. This system can acquire and reconstruct 720 projections (1024x1024 pixels) at 0.25 deg angular increments in under 5 min using a dedicated 32-node computer cluster. At this throughput, hundreds of specimens can be imaged in a 24 h experiment. Alternatively, time-dependent 3D sample evolution can be studied on practical time scales. In this work, we present the current instrument status and the most recent application.

关键词： X-rays Tomography Teeth 3D acquisition data acquisition Scintillators Computing systems Statistical analysis 3D image processing visualization

来源：评论

学校读者我要写书评

暂无评论

Modeling and performance analysis of a healthcare admission and utilization processes using visual SLAM and AweSim simulation package

Modeling and performance analysis of a healthcare admission ...

引用

Proceedings of the International conference on Modeling, Simulation and visualization Methods, MSV'04 and Proceedings of the Int. conference on Algorithmic Mathematics and Comput. Sci., AMCS'04

作者： Barbour, Ahmed E. United Arab Emirates University College of Information Technology P.O.Box 17555 Al-Ain United Arab Emirates

ISBN: (纸本)1932415343

A model of a healthcare admission and utilization processes is constructed and analyzed. The performance of the system is investigated using Visual SLAM and AweSim Software Packages. The process of data collection for a healthcare admission process is explained. The utilization of each service type is calculated and compared with the real life setting. The healthcare admission and utilization process network model is built and the summary of the simulation results is given. The objectives are to improve the service quality and reduce the service time which are achieved through recommendations to improve the services.

关键词： Health care

来源：评论

学校读者我要写书评

暂无评论

Density analysis on large geographical databases. Search for an index of centrality of services at urban scale

引用

International conference on Computational Science and Its Applications (ICCSA 2004)

作者： Borruso, G Schoier, G Univ Trieste Ctr Ecellenza Telegeomat GeoNetLab I-34127 Trieste Italy Univ Trieste Dipartimento Sci Econ & Stat I-34127 Trieste Italy

ISBN: (纸本)3540220569

Geographical databases are available to date containing detailed and georeferenced data on population, commercial activities, business, transport and services at urban level. Such data allow examining urban phenomena at very detailed scale but also require new methods for analysis, comprehension and visualization of the spatial phenomena. In this paper a density-based method for extracting spatial information from large geographical databases is examined and first results of its application at the urban scale are presented. Kernel Density Estimation is used as a density based technique to detect clusters in spatial data distributions. GIS and spatial analytical methods are examined to detect areas of high services' supply in an urban environment. The analysis aims at identifying clusters of services in the urban environment and at verifying the correspondence between urban centres and high levels of service.

关键词： Population statistics

来源：评论

学校读者我要写书评

暂无评论

Geometric and visual modelling of complex stratigraphic structures

引用

COMPUTERS & GRAPHICS-UK 2004年第4期28卷 585-599页

作者： Seron, FJ Torrens, JJ Magallon, JA Turon, A Baldassarri, S Univ Zaragoza Tech Sch Engn Engn Res Inst Aragon 13A Adv Comp Graph GrpGIGAComp Sci Dept Zaragoza Spain Publ Univ Navarra Dept Math & Comp Sci Pamplona Spain Univ Zaragoza Stat Methods Dept Zaragoza Spain

Geologists routinely perform three-dimensional analyzes to understand and describe spatial relationships. The end product of any data analysis obtained from structural or stratigraphic geological studies is usually a set of complex surfaces. The graphic presentation of data is important because it influences the geological interpretation of natural phenomena. The purpose of this paper is to present geometric and visual modelling tools and methods that allow geologists to incorporate geological interpretation during the data input process and automatically obtain a realistic three-dimensional simulation of the real shape of a complex geologic structure. The procedure will also provide a graph for any (cross or oblique) section of the structure. Such displays are particularly useful for people who are not familiar with contour maps to help them "see" unusual or special features and to improve the ability to interpret a map. Geometric modelling of these complex surfaces is based on an interpolation method for discontinuous parametric surfaces using finite elements. Visual modelling is based on photorealistic image synthesis following the ray-tracing method. Our techniques are generic (not tied to a specific program) and discussed in terms of general capabilities (not specific program parameters). (C) 2004 Elsevier Ltd. All rights reserved.

关键词： scientific visualization geometric modelling discontinuous surfaces finite element

来源：评论

学校读者我要写书评

暂无评论

Automatic tracking analysis in morris water maze biomedical videos

Automatic tracking analysis in morris water maze biomedical ...

引用

Proceedings of the Fourth IASTED International conference on visualization, Imaging, and Image Processing

作者： Rodríguez, Andrés Ortega-Álvaro, Antonio Sola, Alejandro Micó, Juan Antonio Trelles, Oswaldo Department of Computer Architecture University of Malaga Bulevard Louis Pasteur 35 29071 Malaga Spain Dept. of Neuroscience Pharmacol. and Neurosci. Res. Group University of Cádiz Plaza Fragela 9 11003 Cádiz Spain

ISBN: (纸本)0889864152

We present an automatic video processing system for tracking analysis in the Morris water escape testing videos. This system is able to extract automatically from such videos information (metadata) describing the spatio-temporal trajectories of animals in the maze and the timings of behavioral events such as stopping or crossing of a target area. The specific semantic metadata are produced by the system and saved in a XML file that describes the mice behaviour extracted from the video content. This description is also stored in a database using a data model that allows one to perform subsequent queries to obtain important factual and analytical information and to retrieve and visualize selected video sequences matching specific query criteria. In all cases, we have observed a significant increase in both accuracy and efficiency when undertaking such analysis using the procedures described in this paper, in comparison with current methods.

关键词： Object recognition

来源：评论

学校读者我要写书评

暂无评论

Cross-sectional imaging of the liquid film in horizontal two-phase annular flow

Cross-sectional imaging of the liquid film in horizontal two...

引用

Proceedings of the ASME Heat Transfer/Fluids Engineering Summer conference 2004, HT/FED 2004

作者： Rodriguez, Daniel J. Shedd, Timothy A. Multiphase Flow Visualization and Analysis Laboratory Department of Mechanical Engineering University of Wisconsin-Madison 1500 Engineering Drive Madison WI 53706 United States

Planar laser induced fluorescence (PLIF) was applied to horizontal air/water two-phase annular flow in order to clearly image the liquid film and interfacial wave behavior at the top, side and bottom of the tube. The visualization section was fabricated from FEP, which has nearly the same refractive index as water at room temperature. This index-matched test section was used to allow imaging of the water to within approximately 10 microns of the 15.1 mm I.D. tube wall. A small amount of dye was added to the water with a peak excitation wavelength near that of a pulsed Nd:YAG laser (532 nm). The laser system generated an approximately 5 ns pulsed light sheet at 30 Hz. Images of the liquid film were captured using a digital video camera with a macro lens for a resolution of about 8.2 microns/pixel. Cross-sectional data at 68 annular flow conditions were obtained. The observations of the liquid film between waves indicated that the film thickness was relatively insensitive to both gas and liquid flow in the annular regime, confirming film thickness measurements reported elsewhere. In addition, the structure of waves changes significantly from wavy-annular, where peaked or cresting waves dominate, to fully annular, where the waves are much more turbulent and unstructured. The wave height decreases with increased gas flow and is relatively insensitive to increased liquid flow in the annular regime. The entrainment of gas in the liquid by the waves is very apparent from these images. Although the precise entrainment mechanisms are not entirely clear, a viable folding action mechanism is proposed. The visualization results will be discussed in relation to both conceptual and computational annular flow modeling. Copyright © 2004 by ASME.

关键词： Imaging techniques

来源：评论

学校读者我要写书评

暂无评论

Insights into system - Wide code duplication

Insights into system - Wide code duplication

引用

11th Working conference on Reverse Engineering

作者： Rieger, M Ducasse, S Lanza, M Univ Bern Software Composit Grp CH-3012 Bern Switzerland

ISBN: (纸本)0769522432

Duplication of code is a common phenomenon in the development and maintenance of large software systems. The detection and removal of duplicated code has become a standard activity during the refactoring phases of a software life-cycle. However code duplication identification tends to produce large amounts of data making the understanding of the duplication situation as a whole difficult. Reengineers can easily lose sight of the forest for the trees. There is a need to support a qualitative analysis of the duplicated code. In this paper we propose a number of visualizations of duplicated source elements that support reengineers in answering questions, e.g., which parts of the system are connected by copied code or which parts of the system are copied the most.

关键词： code duplication detection code visualization polymetric views

来源：评论

学校读者我要写书评

暂无评论

LoD volume rendering of FEA data 04

LoD volume rendering of FEA data

引用

IEEE visualization 2004 conference

作者： Ueng, SK Su, YJ Chang, CT Natl Taiwan Ocean Univ Dept Comp Sci Chilung 202 Taiwan

ISBN: (纸本)0780387880

In this article, a new multiple resolution volume rendering method for Finite Element analysis (FEA) data is presented. Our method is composed of three stages: At the first stage, the Gauss points of the FEA cells are calculated. The function values, gradients, diffusions, and influence scopes of the Gauss points are computed. By representing the Gauss points a, graph vertices and connecting adjacent Gauss points with edges, an adjacency graph is created. The adjacency graph is used to represent the FEA data in the subsequent computation. At the second stage, a hierarchical structure is established upon the adjacency graph. Any two neighboring vertices with similar function values are merged into a new vertex. The similarity is measured by using a user-defined threshold. Consequently a new adjacency graph is constructed. Then the threshold is increased. and the graph reduction is triggered again to generate another adjacency graph. By repeating the processing, multiple adjacency graphs are computed, and a Level of Detail(LoD) representation of the FEA data is established. At the third stage, the LoD structure is rendered by using a splatting method. At first, a level of adjacency graph is selected by users. The graph vertices are sorted based on their visibility orders and projected onto the image plane in back-to-front order. Billboards are used to render the vertices in the projection. The function values, gradients, and influence scopes of the vertices are utilized to decide the colors, opacities. orientations, and shapes of the billboards. The billboards are then modulated with texture maps to generate the footprints of the vertices. Finally, these footprints are composited to produce the volume rendering image.

关键词： volume rendering splatting method level-of-detail unstructured data scientific visualization

来源：评论

学校读者我要写书评

暂无评论

dynaLYZE - A Matlab-based analysis package for dynamic optical tomography with the DYNOT system

dynaLYZE - A Matlab-based analysis package for dynamic optic...

引用

Biomedical Topical Meeting, BIOMED 2004

作者： Pei, Yaling Graber, Harry L. Xu, Yong Barbour, Randall L. NIRx Medical Technologies Corp. LLC. 15 Cherry Lane Glen HeadNY11545 United States Pathology Department SUNY Downstate Medical Center Box 25 450 Clarkson Ave. BrooklynNY11203 United States

dynaLYZE is a Matlab-based multifunctional analysis and visualization package accompanying the DYNOT image system, and was developed by NIRx Medical Technologies. It allows users to easily reorganize, image and interp... 详细信息

ISBN: (纸本)1557527695

关键词： Optical tomography

来源：评论

学校读者我要写书评

暂无评论

Lessons from learning theory for benchmark design

Lessons from learning theory for benchmark design

引用

conference on Algorithms for Synthetic Aperture Radar Imagery XI

作者： Langford, J Toyota Technol Inst Chicago IL USA

ISBN: (纸本)0819453501

This discussion/tutorial consists of a few short discussions on the (theoretical) trade-offs of various choices in constructing benchmarks. Most of the results discussed here are "common sense" at high level. However, all of this "common sense" is (to some extent) quantifiable common sense, and occasionally that quantification is useful. These short discussions cover: 1) Prediction Domains & Loss functions, 2) Prediction settings, 3) Assumption Failures.

关键词： Curium Objectives Radon Statistical analysis Algorithms data visualization Information theory Probability theory Stochastic processes Synthetic aperture radar

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：