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- From: sam@zoar.sarnoff.com (Scott A. Markel x2683)
- Newsgroups: comp.ai.neural-nets
- Subject: NIPS 92 Workshop on Training Issues
- Message-ID: <SAM.92Nov19115304@zoar.sarnoff.com>
- Date: 19 Nov 92 16:53:04 GMT
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- **************************** NIPS 92 Workshop *****************************
-
- "Computational Issues in Neural Network Training"
-
- or
-
- Why is Back-Propagation Still So Popular?
-
- ********************************************************************************
-
- Roger Crane and I are are leading a NIPS '92 workshop on "Computational Issues
- in Neural Network Training". Our workshop will be on Saturday, 5 December, the
- second of two days of workshops in Vail.
-
- The discussion will focus on optimization techniques currently used by neural
- net researchers, and include some other techniques that are available. Back-
- propagation is still the optimization technique of choice even though there are
- obvious problems in training with BP: speed, convergence, ... . Several innova-
- tive algorithms have been proposed by the neural net community to improve upon
- BP, e.g., Scott Fahlman's QuickProp. We feel that there are classical optimiza-
- tion techniques that are superior to back-propagation. In fact, gradient
- descent (BP) fell out of favor with the mathematical optimization folks way back
- in the 60's! So why is BP still so popular?
-
- Topics along these lines include:
-
- * Why are classical methods generally ignored?
-
- * Computational speed
-
- * Convergence criteria (or lack thereof!)
-
- Broader issues to be discussed include:
-
- * Local minima
-
- * Selection of starting points
-
- * Conditioning (for higher order methods)
-
- * Characterization of the error surface
-
- If you would like to present something on any of these or similar topics, please
- contact me by e-mail and we can discuss details.
-
- Workshops are scheduled for a total of four hours. We're allowing for approxi-
- mately 8 presentations of 10-20 minutes each, since we want to make sure that
- ample time is reserved for discussion and informal presentations. We will
- encourage (incite) lively audience participation. By the way, none of the NIPS
- workshops are limited to presenters only. People who want to show up and just
- listen are more than welcome.
-
- --
- Scott Markel Computational Science Research
- smarkel@sarnoff.com David Sarnoff Research Center
- Tel. 609-734-2683 CN 5300
- FAX 609-734-2662 Princeton, NJ 08543-5300
-