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检索条件"任意字段=Conference on Visualization and Data Analysis 2002"

共 315 条记录，以下是221-230 订阅

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Case study: Interactive visualization for Internet security

Case study: Interactive visualization for Internet security

引用

IEEE conference on visualization

作者： Soon Tee Teoh Kwan-Liu Ma S.F. Wu Xiaoliang Zhao Department of Computer Science University of California Davis USA Department of Computer Science North Carolina State University USA

Internet connectivity is defined by a set of routing protocols which let the routers that comprise the Internet backbone choose the best route for a packet to reach its destination. One way to improve the security and performance of Internet is to routinely examine the routing data. In this case study, we show how interactive visualization of Border Gateway Protocol (BGP) data helps characterize routing behavior, identify weaknesses in connectivity which could potentially cripple the Internet, as well as detect and explain actual anomalous events.

关键词： Computer aided software engineering Internet IP networks data security Computer science Routing protocols data visualization Face detection data analysis Spine

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data mining for selective visualization of large spatial datasets

Data mining for selective visualization of large spatial dat...

引用

International conference on Tools for Artificial Intelligence (ICTAI)

作者： S. Sekhar Chang-Tien Lu Pusheng Zhang Rulin Liu Computer Science & Engineering Department University of Minnesota Department of Computer Science Northern Virginia Center USA Computer Science & Engineering Department University of Minnesota USA

data mining is the process of extracting implicit, valuable, and interesting information from large sets of data. visualization is the process of visually exploring data for pattern and trend analysis, and it is a common method of browsing spatial datasets to look for patterns. However the growing volume of spatial datasets make it difficult for humans to browse such datasets in their entirety, and data mining algorithms are needed to filter out large uninteresting parts of spatial datasets. We construct a web-based visualization software package for observing the summarization of spatial patterns and temporal trends. We also present data mining algorithms for filtering out vast parts of datasets for spatial outlier patterns. The algorithms were implemented and tested with a real-world set of Minneapolis-St. Paul (Twin Cities) traffic data.

关键词： data mining data visualization Cities and towns Spatial databases Telecommunication traffic Traffic control Computer science Humans Filters Testing

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A radial focus+context visualization for multi-dimensional functions

A radial focus+context visualization for multi-dimensional f...

引用

IEEE conference on visualization

作者： S. Jayaraman C. North Center for Human Computer Interaction Department of Computer Science Virginia Polytechnic Institute and State University Blacksburg VA USA

The analysis of multidimensional functions is important in many engineering disciplines, and poses a major problem as the number of dimensions increases. Previous visualization approaches focus on representing three or fewer dimensions at a time. This paper presents a new focus+context visualization that provides an integrated overview of an entire multidimensional function space, with uniform treatment of all dimensions. The overview is displayed with respect to a user-controlled polar focal point in the function's parameter space. Function value patterns are viewed along rays that emanate from the focal point in all directions in the parameter space, and represented radially around the focal point in the visualization. data near the focal point receives proportionally more screen space than distant data. This approach scales smoothly from two dimensions to 10-20, with a 1000 pixel range on each dimension.

关键词： Multidimensional systems data visualization Performance analysis System performance Human computer interaction Computer science Chromium User interfaces Graphical user interfaces Computer graphics

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A model for the visualization exploration process

A model for the visualization exploration process

引用

IEEE conference on visualization

作者： T.J. Jankun-Kelly Kwan-Liu Ma M. Gertz Computer Science Department University of California Davis CA USA Database and Information Systems Group Computer Science Department University of California Davis CA USA

The current state of the art in visualization research places strong emphasis on different techniques to derive insight from disparate types of data. However, little work has investigated the visualization process itself. The information content of the visualization process - the results, history, and relationships between those results - is addressed by this work. A characterization of the visualization process is discussed, leading to a general model of the visualization exploration process. The model, based upon a new parameter derivation calculus, can be used for automated reporting, analysis, or visualized directly. An XML-based language for expressing visualization sessions using the model is also described. These sessions can then be shared and reused by collaborators. The model, along with the XML representation, provides an effective means to utilize information within the visualization process to further data exploration.

关键词： data visualization Computer science Collaboration XML Computer graphics Documentation History Calculus Pressing Chromium

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Volume deformation for tensor visualization

Volume deformation for tensor visualization

引用

IEEE conference on visualization

作者： Xiaoqiang Zheng A. Pang Computer Science Department University of California Santa Cruz CA USA

Visualizing second-order 3D tensor fields continue to be a challenging task. Although there are several algorithms that have been presented, no single algorithm by itself is sufficient for the analysis because of the complex nature of tensor fields. In this paper, we present two new methods, based on volume deformation, to show the effects of the tensor field upon its underlying media. We focus on providing a continuous representation of the nature of the tensor fields. Each of these visualization algorithms is good at displaying some particular properties of the tensor field.

关键词： Tensile stress data visualization Biomedical imaging Ellipsoids Eigenvalues and eigenfunctions Computer science Algorithm design and analysis Chromium Computer graphics Capacitive sensors

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Financial Reminiscences: an example of art based on information visualization in finance

Financial Reminiscences: an example of art based on informat...

引用

International conference on Information Visualisation (IV)

作者： Y. Saito INES Corporation Japan

Useful techniques for information visualization allow engineers or analysts to produce works of art. A work entitled "Financial Reminiscences" is an example of such works. This work has been produced using a visualization technique for financial analysis. This technique is not only a tool for generating images. It is closely related to the information visualized in the work. Thus, the audience needs to understand the visualization technique and then to analyze the information.

关键词： Subspace constraints Finance Portfolios Frequency Art Information analysis Image generation data visualization Economic forecasting Cellular phones

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Upper airway segmentation and measurement in MRI using fuzzy connectedness

Upper airway segmentation and measurement in MRI using fuzzy...

引用

Medical Imaging 2002 conference

作者： Liu, JG Udupa, JK Odhner, D McDonough, JM Arens, R Univ Penn Dept Radiol Med Image Proc Grp Philadelphia PA 19104 USA

ISBN: (纸本)0819444286

The purpose of this work is to build a computerized system for the delineation of upper airway structures via MRI and to evaluate its effectiveness for routine clinical use in aiding diagnosis of upper airway disorders in children. We use two MRI protocols, axial T1 and T2, to gather information about different aspects of the airway and its surrounding soft tissue structures including adenoid, tonsils, tongue and soft palate. These images are processed and segmented to compute the architectural parameters of the airway such as its surface description, volume, central (medial) line, and cross-sectional areas at planes orthogonal to the central line. We have built a software package based on 3DVIEWNIX and running on a 450 MHz Pentium PC under Linux system (and on a Sun workstation under Unix) for the various operations of visualization, segmentation, registration, prefiltering, interpolation, standardization, and quantitative analysis of the airway. The system has been tested utilizing 40 patient studies. For every study, the system segmented and displayed a smooth 3D rendition of the airway, its central line and a plot of the cross-sectional area of the airway orthogonal to the central line as a function of the distance from one end of the central line. The tests indicate 97% precision and accuracy for segmentation. The mean time taken per study is about 4 minutes for the airway. This includes operator interaction time and processing time. This method provides a robust and fast means of assessing the airway size, shape, and places of restriction, as well as providing a structural data set suitable for use in modeling studies of airflow and mechanics.

关键词： upper airway magnetic resonance imaging segmentation quantitative evaluation visualization fuzzy connectedness

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Case study: visualization and analysis of high Rayleigh number - 3D convection in the Earth's mantle

Case study: Visualization and analysis of high Rayleigh numb...

引用

IEEE conference on visualization

作者： G. Erlebacher D.A. Yuen F. Dubuffet School of Computer Science & Information Technology Florida State University USA Minnesota Supercomputer Institute University of Minnesota USA

data sets from large-scale simulations (up to 501/sup 3/ grid points) of mantle convection are analyzed with volume rendering of the temperature field and a new critical point analysis of the velocity field. As the Rayleigh number Ra is increased the thermal field develops increasingly thin plume-like structures along which heat is convected. These eventually break down and become turbulent. visualization methods are used to distinguish between various models of heat conductivity and to develop an intuitive understanding of the structure of the flow.

关键词： Computer aided software engineering visualization Earth Thermal conductivity Temperature Equations Information analysis Thermal pollution Geoscience Computer graphics

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Time and space evolution of electromagnetic field radiated and scattered by wire structures

Time and space evolution of electromagnetic field radiated a...

引用

International conference on Microwaves, Radar and Wireless Communications

作者： M. Surma Institute of Electronics Silesian University of Technology Gliwice Poland

In this paper attention is focused on visualization and animation of the time and space evaluation of electromagnetic fields radiated and scattered by, simple, wire structures under pulse excitation. For obtaining distribution of electromagnetic fields, FDTD technique was employed. For visualization and animation the numerical results, Mathematica of the Wolfram Research and PowerPoint were employed, respectively. That kind of representation of the results may be very helpful for understanding transient electromagnetic phenomena.

关键词： Electromagnetic fields Electromagnetic scattering Wire Time domain analysis Finite difference methods Animation Electromagnetic transients Transient analysis Electromagnetic radiation data visualization

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Neighborgram clustering. Interactive exploration of cluster neighborhoods

Neighborgram clustering. Interactive exploration of cluster ...

引用

IEEE International conference on data Mining (ICDM)

作者： M.R. Berthold B. Wiswedel D.E. Patterson Data Analysis Research Laboratory Tripos Inc. San Francisco CA USA

We describe an interactive way to generate a set of clusters for a given data set. The clustering is done by constructing local histograms, which can then be used to visualize, select, and fine-tune potential cluster candidates. The accompanying algorithm can also generate clusters automatically, allowing for an automatic or semi-automatic clustering process where the user only occasionally interacts with the algorithm. We illustrate the ability to automatically identify and visualize clusters using NCI's AIDS Antiviral Screen data set.

关键词： Clustering algorithms data analysis data visualization Histograms Training data Prototypes Greedy algorithms Pattern analysis Algorithm design and analysis Bioinformatics

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