PDF eBook
Sample Preview
Size 278k
Free
Download a sample of the first 25 pages
Download Preview

Entire PDF eBook
4091k
$12
Get instant access to an entire eBook
Buy PDF Password Download Complete PDF
eBook editions

Data-Driven Modeling using Spherical Self-Organizing Feature Maps

by Archana P. Sangole
 Paperback   small ebook icon   eBook PDF
Publisher:  Dissertation
Pub date:  2006
Pages:  156
ISBN-10:  1581123191
ISBN-13:  9781581123197
Categories:  Computer Science  Computers  Science

Abstract

Researchers and data analysts are increasingly relying on graphical tools to assist them in modeling their data, generating their hypotheses, and gaining deeper insights on their experimentally acquired data. Recent advances in technology have made available more improved and novel modeling and analysis media that facilitate intuitive, task-driven exploratory analysis and manipulation of the displayed graphical representations. In order to utilize these emerging technologies researchers must be able to transform experimentally acquired data vectors into a visual form or secondary representation that has a simple structure and, is easily transferable into the media. As well, it is essential that it can be modified or manipulated within the display environment.
This thesis presents a data-driven modeling technique that utilizes the basic learning strategy of an unsupervised clustering algorithm, called the self-organizing feature map, to adaptively learn topological associations inherent in the data and preserve them within the topology imposed by its predefined spherical lattice, thereby transforming the data into a 3D tessellated form. The tessellated graphical forms originate from a sphere thereby simplifying the process of computing its transformation parameters on re-orientation within an interactive, task-driven, graphical display medium. A variety of data sets including six sets of scattered 3D coordinate data, chaotic attractor data, the more commonly used Fisher’s Iris flower data, medical numeric data, geographic and environmental data are used to illustrate the data-driven modeling and visualization mechanism.
The modeling algorithm is first applied to scattered 3D coordinate data to understand the influence of the spherical topology on data organization. Two cases are examined, one in which the integrity of the spherical lattice is maintained during learning and, the second, in which the inter-node connections in the spherical lattice are adaptively changed during learning. In the analysis, scattered coordinate data of freeform objects with topology equivalent to a sphere and those whose topology is not equivalent to a sphere are used. Experiments demonstrate that it is possible to get reasonably good results with the degree of resemblance, determined by an average of the total normalized error measure, ranging from 6.2x10-5 – 1.1x10-3. The experimental analysis using scattered coordinate data facilitates an understanding of the algorithm and provides evidence of the topology-preserving capability of the spherical self-organizing feature map.
The algorithm is later implemented using abstract, seemingly random, numeric data. Unlike in the case of 3D coordinate data, wherein the SOFM lattice is in the same coordinate frame (domain) as the input vectors, the numeric data is abstract. The criterion for deforming the spherical lattice is determined using mathematical and statistical functions as measures-of information that are tailored to reflect some aspect of meaningful, tangible, inter-vector relationships or associations embedded in the spatial data that reveal some physical aspect of the data. These measures are largely application-dependent and need to be defined by the data analyst or an expert. Interpretation of the resulting 3D tessellated graphical representation or form (glyph) is more complex and task dependent as compared to that of scattered coordinate data. Very simple measures are used in this analysis in order to facilitate discussion of the underlying mechanism to transform abstract numeric data into 3D graphical forms or glyphs. Several data sets are used in the analysis to illustrate how novel characteristics hidden in the data, and not easily apparent in the string of numbers, can be reflected via 3D graphical forms.
The proposed data-driven modeling approach provides a viable mechanism to generate 3D tessellated representations of data that can be easily transferred to a graphical modeling and analysis medium for interactive and intuitive exploration.

About the Author

Dr. Sangole is currently a post-doctoral fellow in the School of Physical and Occupational Therapy at McGill University, Montreal - Quebec. Her research includes studying motor control of the hand in patients with hemiparesis following a stroke, with the objective of identifying motor compensatory strategies in the upper limb. Her overall research interests include investigating motor control issues in rehabilitation, specifically neuromuscular control of movement.

She is a mechanical engineer by training and her past research experience included interactive design, deformable modeling, scientific data visualization and Computer Aided Design (CAD) data exchange. Driven by a personal interest in rehabilitation she moved to Galveston, Texas to do research at the University of Texas Medical Branch and the Transitional Learning Center--a post-acute rehabilitation facility for persons with brain injury. After completing a 2-year postdoctoral stint in Texas she returned to Canada to continue her academic career.



PDF eBook
Sample Preview
Size 278k
Free
Download a sample of the first 25 pages
Download Preview

Entire PDF eBook
4091k
$12
Get instant access to an entire eBook
Buy PDF Password Download Complete PDF
eBook editions
Share this book



Relevant events
DEC
11
IKBS 2025
2025 International Conference of Intelligent and Knowledge-Based Systems (IKBS 2025) 2025 International Conference on Intelligent and Knowledge-Based Systems (IKBS 2025) is organized by Nanchang Hangkong University and will be held in Nanchang, China during December 11-14, 2025. The IKBS is a flagship a...
2025 International Conference of Intelligent and Knowledge-Based Systems (IKBS 2025) 2025 International Conference on Intelligent and Knowledge-Based Systems (IKBS 2025) is organized by Nanchang Hangkong University and will be held ...
2025 International Conference of Intelligent and Knowledge-Based Systems (IKBS 2025) 2025 International Conference on Intelligent and Knowledge-Based Systems ...
11 - 14 Dec 2025
Nanchang, China
DEC
15
AGU25
American Geophysical Union (AGU) Fall Meeting The submission period for session, town hall and workshop proposals for AGU25 will open March 2025. Description: The largest Earth and space science meeting in the world, attracting scientists from around the globe. ...
American Geophysical Union (AGU) Fall Meeting The submission period for session, town hall and workshop proposals for AGU25 will open March 2025. Description: The largest Earth and space sci...
American Geophysical Union (AGU) Fall Meeting The submission period for session, town hall and workshop proposals for A...
American Geophysical Union (AGU) Fall Meeting The submission period for session, town hall and...
15 - 19 Dec 2025
New Orleans, United States
OCT
13
IJDMS
International Journal of Database Management Systems (IJDMS) International Journal of Database Management Systems (IJDMS) IJDMS is indexed World Journal Clout Index (WJCI) ISSN : 0975-5705 (Online); 0975-5985 (Print) http://airccse.org/journal/ijdms/index.html Scope & ...
International Journal of Database Management Systems (IJDMS) International Journal of Database Management Systems (IJDMS) IJDMS is indexed World Journal Clout Index (WJCI) ISSN : 0975-5705 (Online); 0...
International Journal of Database Management Systems (IJDMS) International Journal of Database Management Systems (IJDMS) IJDMS i...
International Journal of Database Management Systems (IJDMS) International Journal of Database Management S...
13 - 20 Oct 2025
Online Event | India
OCT
16
IEEE ICCT 2025
2025 IEEE 25th International Conference on Communication Technology (25th IEEE ICCT) Proceedings Publication: Accepted academic papers will be published by IEEE, and conference papers that meet IEEE Standards can be indexed by the IEEE Xplore Digital Library. IEEE ICCT2025 has been listed on IEEE confere...
2025 IEEE 25th International Conference on Communication Technology (25th IEEE ICCT) Proceedings Publication: Accepted academic papers will be published by IEEE, and conference papers that meet IEEE Standards can be indexed by the ...
2025 IEEE 25th International Conference on Communication Technology (25th IEEE ICCT) Proceedings Publication: Accepted academic papers will be published by I...
16 - 18 Oct 2025
Shenyang, China
OCT
17
ICBSP 2025
2025 10th International Conference on Biomedical Imaging, Signal Processing (ICBSP 2025) Paper Publication: 1. ICBSP 2025 SPIE Conference Proceedings: indexed by Ei Compendex and Scopus, and submitted to be reviewed by CPCI. 2. Journal of Image and Graphics (JOIG, ISSN: 2301-3699), Cite Score: 4.1, which wil...
2025 10th International Conference on Biomedical Imaging, Signal Processing (ICBSP 2025) Paper Publication: 1. ICBSP 2025 SPIE Conference Proceedings: indexed by Ei Compendex and Scopus, and submitted to be reviewed by CPCI. 2. Journa...
2025 10th International Conference on Biomedical Imaging, Signal Processing (ICBSP 2025) Paper Publication: 1. ICBSP 2025 SPIE Conference Proceedings: indexed by...
17 - 19 Oct 2025
Xiamen, China
OCT
17
ICICM 2025
2025 The 10th International Conference on Integrated Circuits and Microsystems (ICICM 2025) Publication: The accepted and registered papers will be publication in Conference Proceedings, which will be indexed by EI Compendex, Scopus, etc.
2025 The 10th International Conference on Integrated Circuits and Microsystems (ICICM 2025) Publication: The accepted and registered papers will be publication in Conference Proceedings, which will be indexed by EI Compendex, Scopus, etc.
2025 The 10th International Conference on Integrated Circuits and Microsystems (ICICM 2025) Publication: The accepted and registered papers will be publication in C...
17 - 19 Oct 2025
Hefei, China
OCT
17
ICPEES2025
2025 2nd International Conference on Power Electronics and Energy System (ICPEES 2025) After a careful reviewing process, all accepted papers after proper registration and presentation, will be published in The ICPEES 2025 Conference Proceedings. The proceedings will be submitted to Engineering Village, Scop...
2025 2nd International Conference on Power Electronics and Energy System (ICPEES 2025) After a careful reviewing process, all accepted papers after proper registration and presentation, will be published in The ICPEES 2025 Conference ...
2025 2nd International Conference on Power Electronics and Energy System (ICPEES 2025) After a careful reviewing process, all accepted papers after proper regis...
17 - 19 Oct 2025
Bangkok, Thailand
OCT
18
AIMLNET 2025
5th International conference on AI, Machine Learning in Communications and Networks (AIMLNET 2025) 5th International conference on AI, Machine Learning in Communications and Networks (AIMLNET 2025) October 18 -19, 2025 ,Sydney, Australia https://csty2025.org/aimlnet/index Scope & Topics 5th International conferen...
5th International conference on AI, Machine Learning in Communications and Networks (AIMLNET 2025) 5th International conference on AI, Machine Learning in Communications and Networks (AIMLNET 2025) October 18 -19, 2025 ,Sydney, Australia https...
5th International conference on AI, Machine Learning in Communications and Networks (AIMLNET 2025) 5th International conference on AI, Machine Learning in Communications a...
18 - 19 Oct 2025
Sydney, Australia, Australia
OCT
20
NANOP 2025
NANOP 2025: Functional Nanophotonics After tremendous endeavors, Nanophotonics has already departed from its infancy and stepped into an exciting era, where research ideas and theoretical concepts are being vigorously transferred into functional devices and r...
NANOP 2025: Functional Nanophotonics After tremendous endeavors, Nanophotonics has already departed from its infancy and stepped into an exciting era, where research ideas and theoreti...
NANOP 2025: Functional Nanophotonics After tremendous endeavors, Nanophotonics has already departed from its i...
NANOP 2025: Functional Nanophotonics After tremendous endeavors, Nanophotonics has al...
20 - 22 Oct 2025
Paris, France
OCT
23
WCSP 2025
The Seventeenth International Conference on Wireless Communications and Signal Processing (WCSP 2025) WCSP is an annual International Conference on Wireless Communications and Signal Processing (WCSP). The aim of the conference is to provide an international forum that brings together researchers from academia and practiti...
The Seventeenth International Conference on Wireless Communications and Signal Processing (WCSP 2025) WCSP is an annual International Conference on Wireless Communications and Signal Processing (WCSP). The aim of the conference is to provide an inte...
The Seventeenth International Conference on Wireless Communications and Signal Processing (WCSP 2025) WCSP is an annual International Conference on Wireless Communications and...
23 - 25 Oct 2025
Chongqing, China