Wing-Kay Kan

Learn More
An important step in building up the document database of a full-text retrieval system is to classify each document under one or more <i>classes</i> according to the <i>topical domains</i> that the document discusses. This is commonly referred to as <i>classification. Automatic classification</i> attempts to replace human classifiers by using computers to(More)
Recently we have proposed a simple circuit of winner-take-all (WTA) neural network. Assuming no external input, we have derived an analytic equation for its network response time. In this paper, we further analyze the network response time for a class of winner-take-all circuits involving self-decay and show that the network response time of such a class of(More)
In the use of extended Kalman filter approach in training and pruning a feedforward neural network, one usually encounters the problems on how to set the initial condition and how to use the result obtained to prune a neural network. In this paper, some cues on the setting of the initial condition will be presented with a simple example illustrated. Then(More)
In this paper, the regularization of employing the forgetting recursive least square (FRLS) training technique on feedforward neural networks is studied. We derive our result from the corresponding equations for the expected prediction error and the expected training error. By comparing these error equations with other equations obtained previously from the(More)
Pruning a neural network to a reasonable smaller size, and if possible to give a better generalization, has long been investigated. Conventionally the common technique of pruning is based on considering error sensitivity measure, and the nature of the problem being solved is usually stationary. In this article, we present an adaptive pruning algorithm for(More)
Virtual Campus is an Internet application in education. It combines the advantages of both group and individual learning approaches based on advanced network technologies. Virtual Campus models the new learning environment where students can customize their study in their own pace. Providing up-to-date learning material and personal study guide, Virtual(More)