papers available by ftp

[williabv]

FTP-host: archive.cis.ohio-state.edu
FTP-file: pub/neuroprose/williams.wcci94.ps.Z

FTP-host: archive.cis.ohio-state.edu
FTP-file: pub/neuroprose/williams.ecal_93.ps.Z

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The following two papers have been placed in the Neuroprose repository:

pub/neuroprose/williams.wcci94.ps.Z

Improving Classification Performance in the Bumptree Network by Optimising
Topology with a Genetic Algorithm.  

Williams, B. V., Bostock, R. T. J., Bounds, D. G. and Harget, A. J.
Submitted to IEEE Evolutionary Computation 1994, part of WCCI '94.

ABSTRACT:  The Bumptree is a binary tree of Gaussians which partitions a
Euclidian space.  The leaf layer consists of a set of local linear classifiers,
and the whole system can be trained in a supervised manner to form a piecewise 
linear model.  In this paper a Genetic Algorithm (GA) is used to optimise the
topology of the tree.  We discuss the properties of the genetic coding scheme, 
and argue that the GA/bumptree does not suffer from the same scaling 
problems as other GA/neural-net hybrids.  Results on test problems, including
a non-trivial classification task, are encouraging, with the GA able to
discover topologies which give improved performance over those generated by
a constructive algorithm.

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pub/neuroprose/williams.ecal_93.ps.Z

Learning and Evolution in Populations of Backprop Networks

Williams, B.V. and Bounds, D. G. 
Presented at ECAL '93 in Brussels.

ABSTRACT:  This paper describes some simple Artificial Life experiments based 
on an earlier paper by Parisi, Nolfi and Cecconi (1991) in which an MLP
controls a simple animat (simulated animal).  A GA is used to optimise
connection weights to produce basic food gathering behaviour.  We discuss 
the merits of the approach, and suggest a more simple explanation of certain
observed behaviours to that offered by the original authors.

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How to retrieve and print the papers - an example session:

% ftp archive.cis.ohio-state.edu
Connected to archive.cis.ohio-state.edu.
220 archive FTP server (Version wu-2.4(2) Mon Apr 18 14:41:30 EDT 1994) ready.
Name (archive.cis.ohio-state.edu:myname): anonymous
331 Guest login ok, send your complete e-mail address as password.
Password: myname at mysite
230 Guest login ok, access restrictions apply.
ftp> cd pub/neuroprose
250-Please read the file README
250-  it was last modified on Fri Jul  2 09:04:46 1993 - 334 days ago
250 CWD command successful.
ftp> binary
200 Type set to I.
ftp> get williams.wcci94.ps.Z

[wait while the file is downloaded]

ftp> quit
221 Goodbye.
% uncompress williams.wcci94.ps.Z
% lp williams.wcci94.ps