Téma disertační práce

Školitel:Zbořil František V., doc. Ing., CSc.
Téma:Neuronové asociativní paměti
Zahájení v ak.r.:1997/1998
Obhajoba disertace:2001-05-04
Název disertace:Neural Nets as Associative Memories - Sparse Distributed Memory
Charakteristika řešeného problému:

This work is concentrated to the Sparse Distributed Memory as a kind of artificial neural net and associative memory. The SDM captures some basic properties of human long-term memory. The first aim of the work is to analyze SDM efficiency in dependence on the pattern data properties. Some statistical properties of pattern data are studied and two hypotheses useful for algorithmic SDM adjusting are introduced. The hypotheses limits the radius value, the most important SDM parameter. The second aim of the work is directed to an extension of SDM. Original SDM model proposed by Kanerva has several weaknesses: it assumes a uniform distribution for the input address vectors, it uses a single fixed threshold (radius) for activating address locations, both the address and data vectors are required to be binary. An extension of original SDM, which removes some of weaknesses, is developed. Final SDM modification - Self-Organizing SDM - can serve vectors of reals in the input and output. The SO-SDM is introduced in some prediction applications. The last aim of the work is the construction of a hierarchical network consisting of SDMs. Proposed hierarchical SDM is motivated by Fukushima's Neocognitron. The utility of the hierarchical SDM is shown in the digit recognition experiment.

Součást výzkumného projektu:
Publikace související s vypsaným tématem:
1999ZBOŘIL František. Neural Associative Memories. In: Proceedings of the MOSIS'99. Rožnov pod Radhoštěm: MARQ, 1999, s. 131-136. ISBN 80-85988-33-X.
1998ZBOŘIL František. Sparse Distributed Memory and Restricted Coulomb Energy Classifier. In: Proceedings of the MOSIS'98. Sv. Hostýn - Bystřice pod Hostýnem: MARQ, 1998, s. 171-176. ISBN 80-85988-23-2.
1997CIBULKA Jan. Sparse Distributed Memory: An Analysis. In: ASIS 1997. Krnov: MARQ, 1997, s. 121-126. ISBN 80-85988-20-8.
 ZBOŘIL František. An Application of the Sparse Distributed Memory. In: Proceedings of the ASIS 1997. Krnov: MARQ, 1997, s. 127-132. ISBN 80-85988-20-8.
1995ZBOŘIL František. Neuronové sítě jako asociativní paměti. In: Sborník ASS 1995. Zábřeh na Moravě, 1995, s. 5-15. ISBN 80-901751-1-2.

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