Mean field theory neural networks for feature recognition, content addressable memory and optimization
Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift
Abstract
Various applications of the mean field theory (MFT) technique for obtaining solutions close to optimal minima in feedback networks are reviewed. Using this method in the context of the Boltzmann machine gives rise to a fast deterministic learning algorithm with a performance comparable with that of the backpropagation algorithm (BP) in feature recognition applications. Since MFT learning is bidirectional its use can be extended from purely functional mappings to a content addressable memory. The storage capacity of such a network grows like O (10–20)nH with the number of hidden units. The MFT learning algorithm is local and thus it has an advantage over BP with respect to VLSI implementations. It is also demonstrated how MFT and BP are related in situations where the number of input units is much larger than the number of output units. In the context offinding good solutions to difficult optimization problems the MFT technique again turns out to be extremely powerful. The quality of the solutions for large travelling salesman and graph partition problems are in parity with those obtained by optimally tuned simulated annealing methods. The algorithm employed here is based on multistate Kvalued (K > 2) neurons rather than binary (K = 2) neurons. This method is also advantageous for more nested decision problems like scheduling. The MFT equations are isomorfic to resistancecapacitance equations and hence naturally map onto custommade hardware. With the diversity of successful application areas the MFT approach thus constitutes a convenient platform for hardware development.
Detaljer
Författare  

Enheter & grupper  
Forskningsområden  Ämnesklassifikation (UKÄ) – OBLIGATORISK

Originalspråk  engelska 

Sidor (fråntill)  333 
Antal sidor  30 
Tidskrift  Connection Science 
Volym  3 
Utgåva nummer  1 
Status  Published  1991 
Publikationskategori  Forskning 
Peer review utförd  Ja 