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

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visualization and analysis of web navigation data

引用

12th International conference on Artifical Neural Networks (ICANN 2002)

作者： Benabdeslem, K Bennani, Y Janvier, E Univ Paris 13 CNRS LIPN F-93430 Villetaneuse France NumSight CH-2074 Marin Switzerland

ISBN: (纸本)3540440747

In this paper, we present two new approaches for the analysis of web site users behaviors. The first one is a synthetic visualization of Log file data and the second one is a coding of sequence based data. This coding allows us to carry out a vector quantization, and thus to find meaningful prototypes of the data set. For this, first the set of sessions is partitioned and then a prototype is extracted from each of the resulting classes. This analytic process allows us to categorize the different web site users behaviors interested by a set of categories of pages in a commercial site.

关键词： Websites

来源：评论

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Knowledge acquisition and modeling in clinical information systems: A case study 13th

Knowledge acquisition and modeling in clinical information s...

引用

13th International conference on Knowledge Engineering and Knowledge Management (EKAW 2002)

作者： Falkman, G Torgersson, O Univ Skovde Dept Comp Sci SE-54128 Skovde Sweden Univ Gothenburg Chalmers Univ Technol Dept Comp Sci SE-41296 Gothenburg Sweden

ISBN: (纸本)3540442685

The goal of the MedView project is to develop models, methods, and tools to support clinicians in their daily work and research. MedView is based on a formal declarative model, which constitutes the main governing principle in MedView, not only in the formalization of knowledge, but in visualization models and in the design and implementation of individual tools and the system as a whole as well. Tools are provided for modeling, acquiring, and sharing knowledge, and for visualization and analysis of data.

关键词： data visualization

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GeoCrystal:: Graphic-interactive access to geodata archives

GeoCrystal:: Graphic-interactive access to geodata archives

引用

conference on visualization and data analysis 2002

作者： Göbel, S Haist, J Jasnoch, U Fraunhofer Inst Comp Graph GIS Dept D-64283 Darmstadt Germany

ISBN: (纸本)0819444057

Recently there is spent a lot of effort to establish information systems and global infrastructures enabling both data suppliers and users to describe (--> eCommerce, metadata) as well as to find appropriate data. Examples for this are metadata information systems, online-shops or portals for geodata. The main disadvantages of existing approaches are insufficient methods and mechanisms leading users to (e.g. spatial) data archives. This affects aspects concerning usability and personalization in general as well as visual feedback techniques in the different steps of the information retrieval process. Several approaches aim at the improvement of graphical user interfaces by using intuitive metaphors, but only some of them offer 3D interfaces in the form of information landscapes or geographic result scenes in the context of information systems for geodata. This paper presents GeoCrystal, which basic idea is to adopt Venn diagrams to compose complex queries and to visualize search results in a 3D information and navigation space for geodata. These concepts are enhanced with spatial metaphors and 3D information landscapes (library for geodata) wherein users can specify searches for appropriate geodata and are enabled to graphic-interactively communicate with search results (book metaphor).

关键词： GeoCrystal GeoLibrary geodata archives information visualization visual information retrieval data mining metadata information systems metaphor spatial landscapes user interaction

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Dynamic multidimensional histograms 02

Dynamic multidimensional histograms

引用

ACM SIGMOD 2002 Proceedings of the ACM SIGMOD International conference on Managment of data

作者： Thaper, Nitin Guha, Sudipto Indyk, Piotr Koudas, Nick MIT United States University of Pennsylvania United States AT and T Research United States

ISBN: (纸本)9781581134971

Histograms are a concise and flexible way to construct summary structures for large data sets. They have attracted a lot of attention in database research due to their utility in many areas, including query optimization, and approximate query answering. They are also a basic tool for data visualization and analysis. In this paper, we present a formal study of dynamic multi-dimensional histogram structures over continuous data streams. At the heart of our proposal is the use of a dynamic summary data structure (vastly different from a histogram) maintaining a succinct approximation of the data distribution of the underlying continuous stream. On demand, an accurate histogram is derived from this dynamic data structure. We propose algorithms for extracting such an accurate histogram and we analyze their behavior and tradeoffs. The proposed algorithms are able to provide approximate guarantees about the quality of the estimation of the histograms they extract. We complement our analytical results with a thorough experimental evaluation using real data sets.

关键词： data visualization

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Multilayer Perceptron discrimination of software quality in a biomedical data analysis system

Multilayer Perceptron discrimination of software quality in ...

引用

IEEE Canadian conference on Electrical and Computer Engineering

作者： Alexiuk, MD Pizzi, NJ Natl Res Council Canada Inst Biodiagnost Winnipeg MB R3B 1Y6 Canada

ISBN: (纸本)0780375149

Biomedical data analysis typically involves large data sets, a diverse user base and intensive visualization procedures. These features place stringent quality demands upon software development and performance for both the architect and supervisor. An invaluable tool for software supervisors would be the automatic qualitative grading of software objects in terms of their extensibility, reusability, clarity and efficiency. This paper examines the quality assessment of software objects by a multilayer perceptron in relation to a gold standard provided by two independent software architects.

关键词： Artificial neural networks parallel programming software metrics

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Investigating a component-oriented approach to adaptive collaborative visualization

Investigating a component-oriented approach to adaptive coll...

引用

conference on visualization and data analysis 2002

作者： Gallop, JR Blair, GS Cooper, CS Coulson, G Duce, DA Fitzpatrick, T Johnson, IJ Rutherford Appleton Lab CLRC Didcot OX11 0QX Oxon England

ISBN: (纸本)0819444057

Collaborative tools are developed to support work being undertaken by dispersed teams. As well as allowing voice and audio, several initiatives have supported collaborative information-rich tasks by enabling dispersed participants to share their visualization insights and to exercise some distributed control. In previous work, tools for collaborative visualization have been based on dataflow visualization systems, allowing visual programs to be rapidly prototyped and allowing not only the sharing of final results but also the process of obtaining them. However there are a number of issues: (1) the need for software policy changes, according to different meeting styles;(2) the presence of competing continuous flows, including voice and video of the participants and visualization movie sequences, in addition to bulk data flows;and (3) the dynamics of available resources which vary between participants or between mobile and office situations or within a single meeting. This need for adaptation is being studied in the Visual Beans project in the UK. The technologies under study include component technology, based on Java and CORBA, the use of continuous media in CORBA components, quality of service (QoS) monitoring and the use of open bindings.

关键词： adaptation collaborative visualization heterogeneous resources monitor

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data mining ocean model output at the naval oceanographic office major shared resource center

Data mining ocean model output at the naval oceanographic of...

引用

MTS/IEEE Oceans 2002 conference

作者： Gruzinskas, P Haas, A Goon, L USN Oceanog Off Stennis Space Ctr MS 39522 USA

ISBN: (纸本)0780375343

One of the Computational Technology Areas supported by the High Performance Computing Modernization Program is Climate, Weather, and Ocean (CWO) modeling. To this end, state-of-the-art computing architectures are leveraged against the extremely difficult problem of mathematically modeling and predicting the behavior of a variety of ocean climatological parameters. The problem at hand is the technology to store, retrieve, manipulate, and display these data has not kept pace with the computational technology. During the last five years, we have seen significant cost reductions associated with applying the status quo in visualization techniques to scientific data sets. This is due in large part to the computer gaming industry, driven by the huge profit margins associated with that market. The scientific community has benefited by these advances in low-cost architectures, but only as a by-product of its original intent, which is entertainment. Even so, these low-cost architectures are not designed to handle the scale of data sizes presented by the scientific community and serve only to make inadequate techniques cheaper to field and use. The Naval Oceanographic Office Major Shared Resource Center (NAVO MSRC) visualization Center is challenged with providing its users state-of-the-art analysis environments for the interrogation of their increasingly large data sets. This paper deals with the data generated by the CWO community, all of whom work with large domains and high resolutions (either vertically, horizontally, or both) that all vary over time. This leads to very large data sets (rows x columns x layers x attribute per cell) for each time step and can challenge even the most powerful architectures when trying to extract or "mine" information from the raw data. As in most visualization applications, the model output deals with physical parameters that are invisible to the naked eye. This means effective methods of display are required for ocean circulation or curren

关键词： Oceanography

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Visual exploration of communication in command and control 6

Visual exploration of communication in command and control

引用

6th International conference on Information Visualisation

作者： Albinsson, PA Morin, M Swedish Def Res Agcy Linkoping Sweden

ISBN: (纸本)0769516564

Communication is a central activity in command and control. However, analysing communication using linear transcription of large amounts of sequential data is tedious and tune consuming. This paper describes an alternative approach to communication analysis based on visual exploration of abstract representations of communication. It introduces a visualisation technique based on the Attribute Explorer. The technique was implemented in a visualisation component embedded in a framework for coordinated presentation of temporal data. It is demonstrated using authentic communication data from a military exercise and a rescue operation.

关键词： Command and control systems data visualization Fires Graphical user interfaces Humans Information science Military communication Navigation Speech analysis Streaming media

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A model for the visualization exploration process

A model for the visualization exploration process

引用

VIS 2002, IEEE Visualisation 2002

作者： Jankun-Kelly, T.J. Ma, Kwan-Liu Gertz, Michael Visualization and Graphics Res. Grp. Center for IPIC University of California Davis CA 95616 United States Database and Information Syst. Group Computer Science Department University of California Davis CA 95616 United States

The current state of the art in visualization research places a 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 the information within the visualization process to further data exploration.

关键词： visualization

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Using quadratic simplicial elements for hierarchical approximation and visualization

Using quadratic simplicial elements for hierarchical approxi...

引用

conference on visualization and data analysis 2002

作者： Wiley, DF Childs, HR Hamann, B Joy, KI Max, NL Univ Calif Davis Dept Comp Sci CIPIC Davis CA 95616 USA

ISBN: (纸本)0819444057

Best quadratic simplicial spline approximations can be computed. using quadratic Bernstein-Bezier basis functions. by identifying and bisecting simplicial elements with largest errors. Our method begins with an initial triangulation of the domain: a best quadratic spline approximation is computed: errors are computed for all simplices. and simplices of maximal error are subdivided. This process is repeated until a user-specified global error tolerance is met. The initial approximations for the unit square and cube are given by two quadratic triangles and five quadratic tetrahedra-respectively. Our more complex triangulation and approximation method that respects field discontinuities and geometrical features allows us to better approximate data. data is visualized by using the hierarchy of increasingly better quadratic approximations generated by this process. Many visualization problems arise for quadratic elements. First tessellating quadratic elements with smaller linear ones and then rendering the smaller linear elements is one way to visualize quadratic elements. Our results show a significant reduction in the number of simplices required to approximate data sets when using quadratic elements as compared to using linear elements.

关键词： quadratic elements higher-order finite elements approximation hierarchical approximation data-dependent approximation visualization spline refinement multiresolution

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