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A self-organizing map with expanding force for data clustering and visualization

A self-organizing map with expanding force for data clusteri...

引用

IEEE International conference on data Mining (ICDM)

作者： Wing-Ho Shum Hui-Dong Jin Kwong-Sak Leung Man-Leung Wong Department of Computer Science and Engineering Chinese University of Hong Kong Hong Kong China Department of Information Systems Lingnan University Hong Kong China

The self-organizing map (SOM) is a powerful tool in the exploratory phase of data mining. However, due to the dimensional conflict, neighborhood preservation cannot always lead to perfect topology preservation. In this paper we establish an expanding SOM (ESOM) to detect and preserve better topology correspondence between the two spaces. Our experiment results demonstrate that the ESOM constructs better mappings than the classic SOM in terms of both topological and quantization errors. Furthermore, clustering results generated by the ESOM are more accurate than those of the SOM.

关键词： data visualization Neurons Quantization Space exploration Network topology Computer science data engineering Information systems data mining data analysis

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Dynamic component program visualization

Dynamic component program visualization

引用

Working conference on Reverse Engineering

作者： L. Martin A. Giesl J. Martin Department of Computer Science Darmstadt University of Technology Darmstadt Germany Department of Computer Science University of Victoria Victoria BC Canada

Dynamic program visualization, i.e. the visualization of the runtime behavior of a program as opposed to the static structure of its source code has been investigated for various kinds of programs, usually on a fairly low level. The focus has been on control flow in procedural programs or on the communication between objects in object-oriented programs. In this paper we explore the usefulness of dynamic program visualization for component programs. We discuss how to visualize component-programs and motivate the need for a proper visualization of the communication among these components. We present a three dimensional visualization and show the integration into the HOTAGENT component development environment.

关键词： Runtime data visualization Computer science Application software Information analysis Communication system control Buildings Maintenance Unified modeling language Formal verification

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Utilization of advanced analysis methods in UMTS networks

Utilization of advanced analysis methods in UMTS networks

引用

IEEE conference on Vehicular Technology (VTC)

作者： J. Laiho M. Kylvaja A. Hoglund Nokia Networks

The scope of this paper is to introduce new analysis and visualization methods for WCDMA cellular networks. The proposed examples are mainly based on the self-organizing map (SOM) method, but also other neural and statistical methods are equally applicable. The main motivation for advanced methods is to increase the abstraction level from the raw network measurements, i.e. radio access network language, to network functional areas or a language closer to the business of network operator. Furthermore the vast amount of quality of service (QoS) and service combinations, that 3G will enable, require effective data handling procedures.

关键词： Intelligent networks 3G mobile communication Radio access networks Quality of service Performance analysis data visualization Education Multiaccess communication Counting circuits Cost function

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Gantt Chart visualization for MPI and Apache multi-dimensional trace files

Gantt Chart visualization for MPI and Apache multi-dimension...

引用

International conference on Parallel and Distributed Systems (ICPADS)

作者： C.E. Wu A. Bolmarcich IBM Thomas J. Watson Research Center Yorktown Heights NY USA

Trace visualization is a way to understand the behavior of an application on computer systems. In this paper we describe the design and implementation of a Gantt Chart visualization tool for visualizing multi-dimensional trace files, particularly traces from Message Passing Interface (MPI) programs and Apache servers. An MPI tracing library is developed for MPI programs, and an Apache server plug-in is developed to generate Web traces. Since the amount of trace data may be large, utilities are provided to convert and merge multiple event trace files into one scalable, self-defining interval file for visualization. The interval format facilitates the development of multiple time-space diagrams for visualization tools. For MPI traces, each record also includes an instruction address for source code association, which provides a way to display the source code and pin-point the line that generates the event.

关键词： Yarn data visualization Message passing Algorithms Animation Statistical analysis Instruments Application software Computer applications File servers

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Selecting the variables that train a self-organizing map (SOM) which best separates predefined clusters

Selecting the variables that train a self-organizing map (SO...

引用

International conference on Neural Information Processing

作者： S. Laine Laboratory of Computer and Information Science Helsinki University of Technology Finland

The paper presents how to find the variables that best illustrate a problem of interest when visualizing with the self-organizing map (SOM). The user defines what is interesting by labeling data points, e.g. with alphabets. These labels assign the data points into clusters. An optimization algorithm looks for the set of variables that best separates the clusters. These variables reflect the knowledge the user applied when labeling the data points. The paper measures the separability, not in the variable space, but on a SOM trained into this space. The found variables contain interesting information, and are well suited for the SOM. The trained SOM can comprehensively visualize the problem of interest, which supports discussion and learning from data. The approach is illustrated using the case of the Hitura mine; and compared with a standard statistical visualization algorithm, the Fisher discriminant analysis.

关键词： data visualization data mining Clustering algorithms Labeling Principal component analysis Laboratories Information science Extraterrestrial measurements Algorithm design and analysis Visual databases

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Wavelet-based lossy compression of barotropic turbulence simulation data

Wavelet-based lossy compression of barotropic turbulence sim...

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data Compression conference (DCC)

作者： J.P. Wilson Department of Computer Science University of Colorado Boulder USA

Summary form only given. data storage issues pose a potential problem in the performance and analysis of turbulence simulations. One tool that has successfully addressed such performance problems in other domains is data compression. Unfortunately, data from turbulence simulations does not usefully compress with lossless methods. In this work, the compression of data from a simulation of barotropic turbulence using wavelet-based lossy coding is examined. The resolution of the data used is 512 by 512. The output of this simulation is the relative vorticity as single precision floating point values. A number of quantities are computed from the relative vorticity. The numerical error in these quantities is evaluated along with visualizations of the vorticity and error correlation with the uncompressed data. It is found that depending on the quantities of interest and the evaluation criteria, compression ratios of 4:1 to 256:1 are achievable. Under a conservative definition of acceptable error, it is possible to recover quantities of interest from data compressed 4:1 (8 bpp), the data rate that in existing practice is used for visualization.

关键词： Computational modeling Computer simulation data visualization Analytical models Statistics data compression Computer science Memory Performance analysis

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Proceedings of the 7th International conference on 3D Web Technology, Web3D '02

Proceedings of the 7th International Conference on 3D Web Te...

引用

7th International conference on 3D Web Technology, Web3D '02

ISBN: (纸本)1581134681

The proceedings contain 23 papers. The topics discussed include: coding polygon meshes as compressable ASCII;rapid evaluation of Catmull-Clark subdivision surfaces;MPEG-4 BIFS streaming of large virtual environments and their animation on the web;facial animation framework for the web and mobile platforms;multiresolution streaming mesh with shape preserving and QoS-like controlling;scheduling level of detail with guaranteed quality and cost;InTml: a description language for VR applications;investigation into effective navigation in desktop virtual interfaces;a generic approach for interfacing VRML browsers to various input devices and creating customizable 3D applications;a collaborative analysis tool for visualization and interaction with spatial data;Web3D in ocean science learning environments: virtual big beef creek;teaching 3D modeling and simulation: virtual kelp forest case study;a 3D XML-based customized framework for dynamic models;and building database applications of virtual reality with X-VRML.

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LEADERS: Lightweight epidemiology advanced detection and emergency response system

LEADERS: Lightweight epidemiology advanced detection and eme...

引用

conference on Chemical and Biological Sensing III

作者： Ritter, T Idaho Technol Inc Salt Lake City UT 84108 USA

ISBN: (纸本)0819444723

Technological advancements in molecular biology now offer a wide-range of applications for bio-warfare defense, medical surveillance, agricultural surveillance and pure research. Idaho Technology has designed and produced the world's fastest DNA-based identifiers. The R.A.P.I.D. TM (Ruggedized Advanced Pathogen Identification Device) provides several options for using sensitive and specific molecular biology-based technology One of the key features of the RAPID is a software package called Detector*. Detector* allows Minimally Trained Care Providers (MTCP) to operate the instrument by automating the steps of running PCR and automatically analyzing the sample data. Pathogen identification is carried out automatically using positive and negative controls to protect against false positive and false negative results. As part of the LEADER system, the Remote RAPID Viewer (RRV) component allows for real-time remote monitoring of PCR reactions run on the RAPID, thus giving the Subject Matter Expert (SME) the ability to request specific tests when triggered by the auto-analysis system. In addition the RRV component facilitates in result verification of tests run by MTCP, assists in tracking outbreaks, and helps coordinate large scale real-time crisis management. The system will allow access to epidemiological data from thin client (i.e. web browser), thus allowing the SME to connect from anywhere with an internet connection. In addition the LEADER system will automatically contact and alert SME when threshold criteria are met, helping reduce the time to first response.

关键词： Surveillance visualization Pathogens data storage Optical tracking databases Visual analytics Analytical research Internet Situational awareness sensors

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Interactive visualization and analysis for gene expression data

Interactive visualization and analysis for gene expression d...

引用

Annual Hawaii International conference on System Sciences (HICSS)

作者： Chun Tang Li Zhang Aidong Zhang Department of Computer Science and Engineering State University of New York University at Buffalo Buffalo NY USA

ISBN: (纸本)0769514359

Currently, the cDNA and genomic sequence projects are processing at such a rapid rate that more and more gene data become available. New methods are needed to efficiently and effectively analyze and visualize this data. We present a visualization method which maps the samples' n-dimensional gene vectors into 2-dimensional points. This mapping is effective in keeping correlation coefficient similarity which is the most suitable similarity measure for analyzing the gene expression data. Our analysis method first removes noise genes from the gene expression matrix, then adjusts the weight for each remaining gene. We have integrated our gene analysis algorithm into a visualization tool based on this mapping method. We can use this tool to monitor the analysis procedure, to adjust parameters dynamically, and to evaluate the result of each step. The experiments based on two groups of multiple sclerosis (MS) and treatment data demonstrate the effectiveness of this approach.

关键词： data visualization Gene expression DNA Humans Algorithm design and analysis Clustering algorithms Computer science data engineering Genomics Bioinformatics

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Music learning through visualization

Music learning through visualization

引用

International conference on Web Delivering of Music (WEDELMUSIC)

作者： R. Hiraga F. Watanabe I. Fujishiro Department of Information Sciences Bunkyo University Japan Graduate School of Humanities and Sciences Ochanomizu University Japan

We have developed a prototype music visualization system that shows the whole piece in a computer window, however long the piece and no matter how many parts it includes, as well as the selected part. The selected part is presented using either performed data or staff notation. Users can better understand performance expression by visualizing the performance with expressive cues of qualitative music terms. Based on this understanding, users can exchange comments with other users, recorded on visualized figures, through the Internet. Though still a prototype, we expect to make our system one that will enable users to better understand a musical piece and its performance, especially for a cooperative performance.

关键词： Multiple signal classification data visualization Prototypes Internet Software prototyping Collaborative work Music Performance analysis User interfaces Layout

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