Publications

1987

EVENT ORIENTED ANALYSIS OF THE EEG: TIME DEPENDENCE AND TOPOGRAPHIC RELATIONS.

Authors
Guedes de Oliveira, P; Martins da Silva, A; Principe, JC; Vaz, F;

Publication
IEEE/Engineering in Medicine and Biology Society Annual Conference

Abstract
A strategy for automated EEG (electroencephalogram) analysis based on time-domain events is presented. It consists of a simple algorithm made of modules. The events are selected and characterized in a first step of analysis according to a hierarchical procedure and then put together to form clusters which may be considered more complex events. Finally, a special-purpose hardware built to map this strategy is briefly described.

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1987

HIDRA - A HIERARCHICAL INSTRUMENT FOR DISTRIBUTED REAL-TIME ANALYSIS OF BIOLOGICAL SIGNALS

Authors
DEOLIVEIRA, PG; PRINCIPE, JC; CRUZ, AN; TOME, AM;

Publication
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING

Abstract

1987

FAST TRANSIENT STABILITY ASSESSMENT IN ELECTRIC POWER SYSTEMS BY PATTERN RECOGNITION.

Authors
Pecas Lopes, JA; Maciel Barbosa, FP; Marques de Sa, JP;

Publication

Abstract
A candidate methodology for online transient stability assessment in power systems is presented. The method uses dynamic system variables as primary features. Linear security functions are derived by applying Fisher discriminant transformations and probabilistic considerations. Test results obtained on the CIGRE system are presented and discussed.

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1986

CROSS-FLOW FILTRATION FOR RECOVERY OF ALKALINE PROTEASES

Authors
CABRAL, JMS; SANTOS, JL; COONEY, CL;

Publication
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY

Abstract

1986

SPATIAL-FILTERING AND FREQUENCY COLOR CODING WITH PHOTOREFRACTIVE CRYSTALS

Authors
BERNARDO, LM; SALGADO, HM; SOARES, ODD;

Publication
OPTICA ACTA

Abstract
Image processing can be supported by efficient thick holographic recording media such as photorefractive crystals. A numerical analysis is presented showing how low- and band-pass tunable filtering as well as frequency color coding can be performed with reflection holographic gratings recorded in photorefractive crystals.

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1986

ON THE CONNECTIONS BETWEEN MATHEMATICAL-PROGRAMMING AND DISCRETE OPTIMAL-CONTROL

Authors
FERREIRA, JAS; VIDAL, RVV;

Publication
LECTURE NOTES IN CONTROL AND INFORMATION SCIENCES

Abstract

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