By I. K. Sethi, Anil K. Jain
With the starting to be complexity of trend popularity comparable difficulties being solved utilizing man made Neural Networks, many ANN researchers are grappling with layout concerns resembling the dimensions of the community, the variety of education styles, and function review and boundaries. those researchers are continuously rediscovering that many studying methods lack the scaling estate; the techniques easily fail, or yield unsatisfactory effects while utilized to difficulties of larger dimension. Phenomena like those are very commonplace to researchers in statistical development reputation (SPR), the place the
curse of dimensionality is a well known problem. concerns on the topic of the educational and try out pattern sizes, characteristic house dimensionality, and the discriminatory strength of other classifier forms have all been generally studied within the SPR literature. it sounds as if besides the fact that that many ANN researchers taking a look at development reputation difficulties aren't conscious of the binds among their box and SPR, and are consequently not able to effectively make the most paintings that has already been performed in SPR. equally, many trend attractiveness and desktop imaginative and prescient researchers don't realize the possibility of the ANN method of resolve difficulties similar to characteristic extraction, segmentation, and item attractiveness. the current quantity is designed as a contribution to the higher interplay among the ANN and SPR study groups
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Additional info for Artificial neural networks and statistical pattern recognition : old and new connections
If an one-layer ANN classifier with a single neuron and hard limiting threshold activation function (a simple perceptron ) is used, then a linear discriminant function is realized and t h e resulting decision surface is a hyperplane . On the other hand, a multilayer ANN with soft limiting threshold activation function can realize an arbitrarily complex decision surface [6, 17, 30, 3 1 , 53]. A number of methods exist to train an ANN [18, 3 1 , 32, 47, 52]. These training methods differ in the error function and in the optimization technique used to determine the weights in the neural network.
11) where parameters Aa and Ba depend on the type, a, of the error function (MSE, REL, FIX) and on the asymptotic probability of misclassification (see Table 1). 235 for t h e fixed increment criteria (Equation (9)). W i t h an increase in the Mahalanobis distance S (or a decrease in the asymptotic probability of misclassification P^ ), the role of training samples in determining t h e weights of the linear discriminant function is diminished and, as a result, the differences between the expected errors EPjifSE, EP$EL and EP$IX increase.
CarnegieMellon - where Lang and Waibel are working - also maintains the best performing public domain speech recognition programs based on conventional methods (hidden Markov models, HMM), according to some observers; these methods are said to be roughly as good as the best proprietary packages, and should make an excellent basis for comparison as this work progresses. In actuality, there are certain difficulties in applying these methods directly to speech data. The information available in speech classification is far less than the information available in the entire speech process; in other words, the sequence of speech labels has less information content than does the entire time-series of speech, by far.