BISC Seminar Announcement April 15, 1999, 4-5pm , 310 Soda

Frank Hoffmann (fhoffman@cs.berkeley.edu)
Sat, 10 Apr 1999 06:42:18 +0200 (MET DST)

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Berkeley Initiative in Soft Computing (BISC)
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B I S C S e m i n a r A n n o u n c e m e n t
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Black and white, gray or colorful universe - the role of dynamical systems
and chaos in fuzzy logic and soft computing

Speaker :

Robert Kozma
Division of Neurobiology
University of California at Berkeley
E-mail: kozma@socrates.berkeley.edu

Date: Thursday, April 15th, 1999
Time: 4-5pm
Location : 310 Soda Hall

Abstract

Major components of soft computing are fuzzy logic, neural networks
probabilistic reasoning, genetic programming and others. During the past
decade, chaos computing has emerged as a new constituent of the soft
computing paradigm. In this talk the following questions will be addressed:
What chaos computing can offer to the soft computing family? How can it
benefit from the powerful results achieved in soft computing to date? How
can it exploit imprecision and partial truth in the data to achieve
robustness and tractability of real-life problems?

At the face, robustness and chaos might seem to be mutually exclusive
fields. At least this appears to be the common wisdom. One must just
remember the extreme sensitivity of deterministic chaos to miniscule
changes of the initial conditions and/or other parametric effects in a
digital computer embodiment. Also, the instability of chaotic orbits, the
fragmentation of attractor basins to the limit of the last bit in digital
representation appear to prevent any robustness and tolerance in chaotic
systems.

The main point of the talk is to show that tools of chaos computing can
create stable and robust behavior in very complex, high-dimensional systems
with a lot of degrees of freedom. The system lives in a high-dimesional
space but its actual response to external stimuli initiates an internal
coarse-graining and self-organization that results in a low-dimensional
structured behavior. The shapes and structures generated by chaos can be
described by fuzzy logic and other tools of soft computing. This issue is
directly related to information granulation, an important concept recently
elaborated in detail by Lotfi Zadeh.

Examples of chaos computing and emergence of stable structures in
mathematical, physical, and biological systems are given. This is a work
jointly with Walter J. Freeman.

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Please direct questions with regard to the contents of the talk
and request for papers to the speaker.
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Frank Hoffmann                               UC Berkeley
Computer Science Division                    Department of EECS
Email: fhoffman@cs.berkeley.edu              phone: 1-510-642-8282
URL: http://http.cs.berkeley.edu/~fhoffman   fax:  1-510-642-5775
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