Browsing George R. Brown School of Engineering by Author "de Figueiredo, Rui J.P."
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An Adaptive OrthogonalSeries Estimator for Probability Density Functions
Anderson, G. Leigh; de Figueiredo, Rui J.P. (19780220)Given a sample set X1,...,XN of independent identically distributed realvalued random variables, each with the unknown probability density function f(â ¢), the problem considered is to estimate f from the sample set. The ... 
An Algorithm for Extraction of More than One Optimal Linear Feature from Several Gaussian Pattern Classes
de Figueiredo, Rui J.P.; Pau, K.C.; Sagar, A. D.; Starks, S.A.; Van Rooy, D.L. (19760420)Two algorithms have been developed at Rice University for optimal linear feature extraction based on the minimization risk (probability) of misclassification under the assumption that the class conditional probability ... 
An Algorithm for Optimal Single Linear Feature Extraction from Several Gaussian Pattern Classes
Starks, S.A.; de Figueiredo, Rui J.P.; Van Rooy, D.L. (19751120)A computational algorithm is presented for the extraction of an optimal single linear feature from several Gaussian pattern classes. The algorithm minimizes the increase in the probability of misclassification in the ... 
Algorithms for Optimal Numerical Quadrature Based on Signal Class Models
de Figueiredo, Rui J.P. (19791101)A framework is presented for constructing various types of numerical quadrature algorithms which take into account the apriori known or estimated properties of the signal being processed. This is done by appropriately ... 
Application of a Frequency Domain Prony Method to Wide Bandwidth Radar Signature Classification
de Figueiredo, Rui J.P.; Hu, C.L. (19790920)A frequency domain Prony approach is presented for extracting features of return signals from targets illuminated by wide bandwidth (short pulse) radar. Theoretical details pertaining to this approach are described in a ... 
Computation of a Unimodular Matrix
Kontos, Athanassios; de Figueiredo, Rui J.P. (19791201)An algorithm for computing a unimodular matrix U(λ) satisfying the equation [A(λ) B(λ)] U(λ) = [1 0] is presented where A(λ) and B(λ) are relatively left prime polynomial matrices. ... 
Computationally Efficient Estimators for the Bayes Risk
Wilcox, Lynn D.; de Figueiredo, Rui J.P. (19780520)A computationally efficient estimator for the Bayes risk is one which achieves a desired accuracy with a minimum of computation. In many problems, for example speech recognition, point evaluations of the class conditional ... 
Design of Optimal Feature Extractors by Mathematical Programming Techniques
de Figueiredo, Rui J.P. (19760620)In an automatic pattern recognition system, the processor that selects and measures features fo the data, on the basis of which classification is made, is called a "feature selector" or "feature extractor". This paper ... 
Feature Extraction Techniques for Classification and Identification of Spectral Signatures
de Figueiredo, Rui J.P. (19760420)Some of the results obtained at Rice University on the extraction of features from spectral signatures for the purpose of classifying and identifying these signatures are described. 
A FourierProny Tauberian Approach to the Analysis of a Mixture of Delayed Signals
de Figueiredo, Rui J.P.; Hu, C.L. (19790920)Let x and y be signals (i.e. realvalued functions of time) of finite duration and energy. In the present paper, we develop a frequency domain Prony approach for interpolating, or in general, approximating y(t) by .... 
LMg SPLINES
de Figueiredo, Rui J.P. (19750720)As an extension of the notion of an <em>Lg</em> spline, three mathematical structures called <em>LMg</em> splines of types, I, II and II are introduced. (partial abstract) 
Nonlinear System Identification Based on a Fock Space Framework
Zyla, Lou; de Figueiredo, Rui J.P. (19790520)A method is presented for the identification of a nonlinear system represented by an operator V:E>Y, where the input space E is a separable Hilbert space over the field of complex numbers and the output space Y is the ... 
On a Class of Minimum Energy Controls Related to Spline Functions
Netravali, Arun N.; de Figueiredo, Rui J.P. (19750720)The problem of determining a minimum energy control for a dynamically interconnected set of p singleinput singleoutput finitedimensional linear timevarying dynamical systems, for which the outputs are constrained to ... 
Optimization Techniques for Feature Extraction in Automatic Pattern Recognition
de Figueiredo, Rui J.P. (19791020)This report summarizes the work performed under the AFOSR grant 752777 over the almost five year period during which the grant was in effect. 
A recursive algorithm for digital Image Processing using Local Statistics
de Figueiredo, Rui J.P. (19790620)An algorithm is presented for digital image processing based on local statistics. The algorithm constitutes a recursive implementaiton of an approach proposed and implemented nonrecursively by J.S. Lee (Naval Research ...