Associative dynamics in a chaotic neural network
Neural Networks
Estimation of periodic-like motions of chaotic evolutions using detected unstable periodic patterns
Pattern Recognition Letters
Noisy Chaotic Neural Networks for Solving Combinatorial Optimization Problems
IJCNN '00 Proceedings of the IEEE-INNS-ENNS International Joint Conference on Neural Networks (IJCNN'00)-Volume 4 - Volume 4
Neural Networks - 2005 Special issue: IJCNN 2005
Pattern Recognition, Third Edition
Pattern Recognition, Third Edition
Digital watermarking based on chaotic map and reference register
Pattern Recognition
Periodicity and stability issues of a chaotic pattern recognition neural network
Pattern Analysis & Applications
Template matching using chaotic imperialist competitive algorithm
Pattern Recognition Letters
Desynchronizing a Chaotic Pattern Recognition Neural Network to Model Inaccurate Perception
IEEE Transactions on Systems, Man, and Cybernetics, Part B: Cybernetics
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Decision Theory and Pattern Recognition (PR) are inter-related. Indeed, if a practitioner is faced with a set of decisions and is required to make one based on the current "state of the world", the problem is easily mapped into a PR problem where one maps the "state of the world" into the feature space, and the set of decisions onto the set of allowable classes. Of the various families of PR, Chaotic Pattern Recognition is a relatively new sub-field in which a system, which demonstrates chaotic behavior under normal conditions, resonates when it is presented with a pattern that it is trained with. The Adachi Neural Network (AdNN) is a classic neural structure which has been proven to demonstrate the phenomenon of Associative Memory (AM). In their pioneering paper Adachi and his co-authors showed that the AdNN also emanates periodic outputs on being exposed to trained patterns. This was later utilized by Calitoiu et al. to design systems which possibly possessed PR capabilities. In this paper, we show that the previously reported properties of the AdNN do not adequately describe the dynamics of the system. Rather, although it possesses far more powerful PR and AM properties than was earlier known, it goes through a spectrum of characteristics as one of its crucial parameters, α, changes. As α increases, the AdNN which is first an AM become quasi-chaotic (A formal explanation of this expression is given in the body of the paper.). The system is then distinguished by two phases which really do not have clear boundaries of demarcation. In the former of these phases it is quasi-chaotic for some patterns and periodic for others. In the latter of these, it exhibits properties that have been unknown - or rather, unreported - till now, namely, a PR capability which even recognizes masked or occluded patterns, in which the network resonates sympathetically for trained patterns while it is quasi-chaotic for untrained patterns. Finally, the system becomes completely periodic. The periodicity of the input patterns for trained and untrained inputs, and the understanding and demonstration of these properties, are to the best of our knowledge, novel.