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检索条件"任意字段=3rd Workshop on Topological Methods in Data Analysis and Visualization"

共 101 条记录，以下是71-80 订阅

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topological methods in data analysis and visualization : theory, algorithms, and applications /

引用

2011年

作者： Valerio Pascucci ... [et al.] editors.

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Complementary Space for Enhanced Uncertainty and Dynamics visualization 3rd

Complementary Space for Enhanced Uncertainty and Dynamics Vi...

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3rd workshop on topological methods in data analysis and visualization

作者： Bajaj, Chandrajit Gillette, Andrew Goswami, Samrat Kwon, Bong June Rivera, Jose Univ Texas Austin Ctr Computat Visualizat Austin TX 78712 USA

ISBN: (纸本)9783642150135

Many computational modeling pipelines for geometry processing and visualization focus on topologically and geometrically accurate shape reconstruction of “primal” space, meaning the surface of interest and the volume it contains. Certain features of a surface such as pockets, tunnels, and voids (small, closed components) often represent important properties of the model and yet are difficult to detect or visualize in a model of primal space alone. It is natural, then, to consider what information can be gained from a model and visualization of complementary space, i.e. the space exterior to but still “near” the surface in question. In this paper, we show how complementary space can be used as a tool for both uncertainty and dynamics visualizations and analysis. © Springer-Verlag Berlin Heidelberg 2011.

关键词： visualization

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topological Flow Structures in a Mathematical Model for Rotation-Mediated Cell Aggregation 3rd

Topological Flow Structures in a Mathematical Model for Rota...

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3rd workshop on topological methods in data analysis and visualization

作者： Wiebel, Alexander Chan, Raymond Wolf, Christina Robitzki, Andrea Stevens, Angela Scheuermann, Gerik Max Planck Inst Kognit & Neurowissensch D-04103 Leipzig Germany

ISBN: (纸本)9783642150135

In this paper we apply vector field topology methods to a mathematical model for the fluid dynamics of reaggregation processes in tissue engineering. The experimental background are dispersed embryonic retinal cells, which re-aggregate in a rotation culture on a gyratory shaker, according to defined rotation and culture conditions. Under optimal conditions, finally complex 3D spheres result. In order to optimize high throughput drug testing systems of biological cell and tissue models, a major aim is to understand the role which the fluid dynamics plays in this process. To allow for a mathematical analysis, an experimental model system was set up, using micro-beads instead of spheres within the culture dish. The qualitative behavior of this artificial model was monitored in time by using a camera. For this experimental setup a mathematical model for the bead-fluid dynamics was derived, analyzed and simulated. The simulations showed that the beads form distinctive clusters in a layer close to the bottom of the petri dish. To analyze these patterns further, we perform a topological analysis of the velocity field within this layer of the fluid. We find that traditional two-dimensional visualization techniques like path lines, streak lines and current time-dependent topology approaches are not able to answer the posed questions, for example they do not allow to find the location of clusters. We discuss the problems of these techniques and develop a new approach that measures the density of advected particles in the flow to find the moving point of particle aggregation. Using the density field the path of the moving aggregation point is extracted.

关键词： Tissue

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Feature Tracking Using Reeb Graphs 3rd

Feature Tracking Using Reeb Graphs

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3rd workshop on topological methods in data analysis and visualization

作者： Weber, Gunther Bremer, Peer-Timo Day, Marcus Bell, John Pascucci, Valerio Lawrence Berkeley Natl Lab Berkeley CA USA

ISBN: (纸本)9783642150135

Tracking features and exploring their temporal dynamics can aid scientists in identifying interesting time intervals in a simulation and serve as basis for performing quantitative analyses of temporal phenomena. In this paper, we develop a novel approach for tracking subsets of isosurfaces, such as burning regions in simulated flames, which are defined as areas of high fuel consumption on a temperature isosurface. Tracking such regions as they merge and split over time can provide important insights into the impact of turbulence on the combustion process. However, the convoluted nature of the temperature isosurface and its rapid movement make this analysis particularly challenging. Our approach tracks burning regions by extracting a temperature isovolume from the four-dimensional space-time temperature field. It then obtains isosurfaces for the original simulation time steps and labels individual connected "burning" regions based on the local fuel consumption value. Based on this information, a boundary surface between burning and non-burning regions is constructed. The Reeb graph of this boundary surface is the tracking graph for burning regions.

关键词： topological data analysis Feature tracking Combustion simulation Reeb graph Tracking graph Tracking accuracy

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Modeling and simplifying morse complexes in arbitrary dimensions 3rd

Modeling and simplifying morse complexes in arbitrary dimens...

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3rd workshop on topological methods in data analysis and visualization, TopoInVis 2009

作者： Čomić, Lidija De Floriani, Leila Faculty of Engineering University of Novi Sad Novi Sad Serbia Department of Computer Science University of Genova Genova Italy

ISBN: (纸本)9783642543005

Ascending and descending Morse complexes, defined by a scalar function f over a manifold domain M, decompose M into regions of influence of the critical points of f, thus representing the morphology of the scalar function f over M in a compact way. Here, we introduce two simplification operators on Morse complexes which work in arbitrary dimensions and we discuss their interpretation as n-dimensional Euler operators. We consider a dual representation of the two Morse complexes in terms of an incidence graph and we describe how our simplification operators affect the graph representation. This provides the basis for defining a multi-scale graph-based model of Morse complexes in arbitrary dimensions. © Springer-Verlag Berlin Heidelberg 2011.

关键词： Graphic methods

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Spatial-social network visualization for exploratory data analysis

Spatial-social network visualization for exploratory data an...

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3rd ACM SIGSPATIAL International workshop on Location-Based Social Networks, LBSN 2011 - Held in Conjunction with the 19th ACM SIGSPATIAL GIS 2011

作者： Luo, Wei MacEachren, Alan M. Yin, Peifeng Hardisty, Frank GeoVISTA Center Department of Geography Penn State University University Park PA United States PDA Group Department of CSE Penn State University University Park PA United States

ISBN: (纸本)9781450310338

There has been considerable interest in applying social network analysis methods to geographically embedded networks such as population migration and international trade. However, research is hampered by a lack of support for exploratory spatial-social network analysis in integrated tools. To bridge the gap, this research introduces a spatial-social network visualization tool, the GeoSocialApp, that supports the exploration of spatial-social networks among network, geographical, and attribute spaces. It also supports exploration of network attributes from community-level (clustering) to individual-level (network node measures). Using an international trade case study, this research shows that mixed methods - - computational and visual - can enable discovery of complex patterns in large spatial-social network datasets in an effective and efficient way. © 2011 ACM.

关键词： International trade

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Visual analysis of I/O system behavior for high-end computing

Visual analysis of I/O system behavior for high-end computin...

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3rd International workshop on Large-Scale System and Application Performance, LSAP'11, Co-located with 20th International ACM Symposium on High-Performance Parallel and Distributed Computing, HPDC 2011

作者： Muelder, Christopher Sigovan, Carmen Ma, Kwan-Liu Cope, Jason Lang, Sam Iskra, Kamil Beckman, Pete Ross, Robert ViDi Group University of California Davis Davis CA 95616 United States Mathematics and Computer Science Division Argonne National Laboratory Argonne IL 60439 United States

ISBN: (纸本)9781450307031

As supercomputers grow ever larger, so too do application run times and data requirements. The operational patterns of modern parallel I/O systems are far too complex to allow for a direct analysis of their trace logs. Several visualization methods have therefore been developed to address this issue. Traditional, direct visualizations of parallel systems, such as Gantt charts, can be applied to parallel file systems, but do they not capture domain specific properties nor scale up to modern systems. We propose a portable I/O tracing system and visualization methods to analyze the traces we have obtained. We demonstrate the effectiveness of this system on existing parallel storage systems. © 2011 ACM.

关键词： Supercomputers

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Dynamic model for enterprise human resources decision support system

Dynamic model for enterprise human resources decision suppor...

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International workshop on Intelligent Systems and Applications

作者： Ma, Honglin Yan, Lei Wang, Ting School of Information Science and Engineering Henan University of Technology ZhengZhou China Network Education and Management Center Henan University of Technology ZhengZhou China School of Economics and Management Henan Polytechnic University JiaoZuo China

ISBN: (纸本)9781424498574

this paper discusses the key issues of dynamic decision model and visualization technology of enterprise human resource management visualization and dynamic decision support system, based on the analysis of development trend and system objective of human resource management information system. And then gives a design method of this system based on B/S structure , according to the status of an enterprise in China. In this system, models mainly are built by dynamic decision and other mathematical methods, and visualization is completed by the technology of dimension of stratified. This system not only has a good forecast precision but also has a good effect by using the actual data in fact. © 2011 IEEE.

关键词： visualization

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Dynamic Model for Enterprise Human Resources Decision Support System

Dynamic Model for Enterprise Human Resources Decision Suppor...

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International workshop on Intelligent Systems and Applications, ISA

作者： Honglin Ma Lei Yan Ting Wang School of Information Science and Engineering Henan University of Technology ZhengZhou China Network Education and Management Center Henan University of Technology ZhengZhou China School of Economics and Management Henan Polytechnic University JiaoZuo China

This paper discusses the key issues of dynamic decision model and visualization technology of enterprise human resource management visualization and dynamic decision support system, based on the analysis of development trend and system objective of human resource management information system. And then gives a design method of this system based on B/S structure , according to the status of an enterprise in China. In this system, models mainly are built by dynamic decision and other mathematical methods, and visualization is completed by the technology of dimension of stratified. This system not only has a good forecast precision but also has a good effect by using the actual data in fact.

关键词： Humans Decision support systems Decision making Resource management Mathematical model Human resource management data visualization

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Bringing Topology-Based Flow visualization to the Application Domain 2nd

Bringing Topology-Based Flow Visualization to the Applicatio...

引用

2nd workshop on Topology-Based methods in visualization

作者： Laramee, Robert S. Chen, Guoning Jankun-Kelly, Monika Zhang, Eugene Thompson, David Swansea Univ Dept Comp Sci Swansea W Glam Wales Oregon State Univ Corvallis OR 97331 USA Mississippi State Univ Mississippi State MS USA

ISBN: (纸本)9783540886051

The visualization community is currently witnessing strong advances in topology-based flow visualization research. Numerous algorithms have been proposed since the introduction of this class of approaches in 1989. Yet despite the many advances in the field, topology-based flow visualization methods have, until now, failed to penetrate industry. Application domain experts are still, in general, not using topological analysis and visualization in daily practice. We present a range of state-of-the art topology-based flow visualization methods such as vortex core line extraction, singularity and separatrix extraction, and periodic orbit extraction techniques, and apply them to real-world data sets. Applications include the visualization of engine simulation data such as in-cylinder flow, cooling jacket flow, as well as flow around a spinning missile. The novel application of periodic orbit extraction to the boundary surface of a cooling jacket is presented. Based on our experiences, we then describe what we believe needs to be done in order to bring topological flow visualization methods to industry-level software applications. We believe this discussion will inspire useful directions for future work.

关键词： flow visualization feature-based flow visualization flow topology applications

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