A neural networks based approach to knowledge aquistion and expert systems

[[abstract]]Often a major difficulty in the design of expert systems is the process of acquiring the requisite knowledge in the form of production rules. This paper presents a novel class of neural networks which are trained in such a way that they provide an appealing solution to the problem of knowledge acquisition. The value of the network parameters, after sufficient training, are then utilized to generate production rules on the basis of preselected meaningful coordinates. Further, the paper provides a mathematical framework for achieving reasonable generalization properties via an appropriate training algorithm (supervised decision-directed learning) with a structure that provides acceptable knowledge representations of the data, The concepts and methods presented in the paper are illustrated through one practical example from medical diagnosis.[[conferencetype]]國際[[conferencedate]]19931017~19931020[[booktype]]紙本[[conferencelocation]]Le Touquet, Franc

On automatic filtering of multilingual texts

An emerging requirement to sift through the increasing ood of text information has led to the rapid development of information ltering technology in the past ve years. This study introduces novel approaches for ltering texts regardless of their source language. We begin with a brief description of related developments in text ltering and multilingual information retrieval. We then present three alternative approaches to selecting texts from a multilingual information stream which represent a logical evolution from existing techniques in related disciplines. Finally, a practical automated performance evaluation technique is proposed.

Self-learning neuro-fuzzy system

[[notice]]補正完畢[[conferencetype]]國內[[conferencedate]]19941028~1994102

Basic concepts and methods for keeping autonomous ground vehicle formations

A desirable basic behavior of a group of autonomous vehicles while in motion is to keep a predefined formation. Normally units are trained to move in formation according to an operational status. Past experience determines the formation for given situations. In this paper, we discuss concepts pertinent to the theory and design of autonomous vehicles moving in formation. Specifically: 1) we present the basic idea of controlling the behavior of autonomous vehicles to keep them in prespecified formation, 2) we examine difficulties in keeping the formation caused by path shapes and obstacles in the path of the vehicles and due to the kinematics and dynamics of the individual vehicle, and 3) we discuss concepts relevant to reformation transitions following temporary changes in the formation caused by the terrain properties and the presence of obstacles

A novel class of neural networks with quadratic junctions

[[abstract]]The authors discuss the architecture and training properties of a multilayer feedforward neural network class that uses quadratic junctions in a neural architecture that uses effectively the backpropagation learning algorithm given by P.J. Werbos (1989). Both the architecture of the quadratic junctions and the backpropagation were adopted so as to endow the networks with appealing training properties (under supervision) and acceptable generalizations. Complexity and learning aspects of this class are examined and compared with traditional networks that use linear junctions.[[conferencetype]]國際[[conferencedate]]19911013~16[[booktype]]紙本[[iscallforpapers]]Y[[conferencelocation]]Charlottesville, V

Radiation and propagation of electromagnetic waves

Radiation and Propagation of Electromagnetic Waves serves as a text in electrical engineering or electrophysics. The book discusses the electromagnetic theory; plane electromagnetic waves in homogenous isotropic and anisotropic media; and plane electromagnetic waves in inhomogenous stratified media. The text also describes the spectral representation of elementary electromagnetic sources; the field of a dipole in a stratified medium; and radiation in anisotropic plasma. The properties and the procedures of Green's function method of solution, axial currents, as well as cylindrical boundaries

Nonlinear electron-wave interaction phenomena

Nonlinear Electron-Wave Interaction Phenomen

Lumped and distributed passive networks: a generalized and advanced viewpoint

Lumped and Distributed Passive Networks: A Generalized and Advanced Viewpoint considers the mathematical study of a subset of passive linear operators. This five-chapter focuses on the questions of analysis and representation of such operators and illustrates the results of these analyses by obtaining some of the limitations that are imposed on the performance of passive systems. The first two chapters deal with the structure of general linear passive operators. These chapters specifically look into the theory of distributions, called generalized functions. The third and fourth chapters illus

INFORMATION FILTERING AND RETRIEVAL: Overview, Issues and Directions BASIS FOR A PANEL DISCUSSION

This paper is intended to serve as a springboard for a panel discussion with audience participation on information filtering and retrieval. Medical informatics is an emerging specialty which links medicine and information technology. With the unprecedented availability of digital information, retrieval and filtering are becoming important aspects of medical informatics. An overview of medical applications for filtering and retrieval is provided, and important stateof -the-art techniques are introduced in a way that does not presuppose prior knowledge in this field. With this basis for understanding issues and research developments, the ensuing discussion will examine challenges and opportunities for workers in this field. 1 Introduction Information filtering and retrieval are emerging as important aspects of medical informatics. Recent advances in this area are reviewed here and discussed from a focused perspective with an emphasis on medical applications which are highly relevant for..

Energy conversion statics

Energy Conversion Statics deals with equilibrium situations and processes linking equilibrium states. A development of the basic theory of energy conversion statics and its applications is presented. In the applications the emphasis is on processes involving electrical energy. The text commences by introducing the general concept of energy with a survey of primary and secondary energy forms, their availability, and use. The second chapter presents the basic laws of energy conversion. Four postulates defining the overall range of applicability of the general theory are set out, demonstrating t