Copyright © 1991 Published by Elsevier Ltd.
Original contribution
Maximum likelihood neural networks for sensor fusion and adaptive classification
Received 28 February 1989;
Abstract
A maximum likelihood artificial neural system (MLANS) has been designed for problems which require an adaptive estimation of metrics in classification spaces. Examples of such problems are an XOR problem and most classification problems with multiple classes having complicated classifier boundaries. The metric estimation has the capability of achieving flexible classifier boundary shapes using a simple architecture without hidden layers. This neural network learns much more efficiently than other neural networks or classification algorithms, and it approaches the theoretical bounds on adaptive efficiency according to the Cramer-Rao theorem. It also provides for optimal fusing of all the available information, such as a priori and real-time information coming from a variety of sensors of the same or different types, and utilizes fuzzy classification variables to provide for the efficient utilization of incomplete or erroneous data, including numeric and symbolic data.
This paper describes the neural network and presents examples of its performances in unsupervised, partially supervised, and environment-interrogation modes. We discuss the Cramer-Rao theory as it relates to neural networks, the relevance of the MLANS to biological and other neural networks, and issues for future work.
Keywords: Neural networks; Maximum likelihood; Adaptive efficiency; Cramer-Rao bounds; Sensor fusion; Adaptive classification; Phase transitions; Attention






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