EMAG Distinguished Seminar

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Speaker: Dr. Edmund Miller

Title: Using Model-Based Parameter Estimation to Increase the Efficiency and Effectiveness of Computational Electromagnetics

This talk summarizes the development and application of exponential series and pole series as fitting models (FMs) in electromagnetics. The specific approaches described here, while known by various names, incorporate a common underlying procedure that is called model-based parameter estimation (MBPE). MBPE provides a way of using data derived from a generating model (GM) or taken from measurements to obtain the FM parameters. The FM can then be used in place of the GM for subsequent applications to decrease data needs and computation costs. An especially important attribute of this approach is that windowed FMs overlapping over the observation range make it possible to adaptively minimize the number of samples needed of an observable to develop a parametric model of it to a prescribed uncertainty. Two specific examples of using MBPE in electromagnetics are the modelling of frequency spectra and far-field radiation patterns. Topics to be discussed include: a preview of model-based parameter estimation; fitting models for waveform and spectral data; function sampling and derivative sampling; adaptive sampling of frequency spectra and far-field patterns; and using MBPE to estimate data uncertainty.

Speaker Bio:
Since earning his PhD in Electrical Engineering at the University of Michigan, E. K. Miller has held a variety of government, academic and industrial positions. These include 15 years at Lawrence Livermore National Laboratory where he spent 7 years as a Division Leader, and 4+ years at Los Alamos National Laboratory from which he retired as a Group Leader in 1993. His academic experience includes holding a position as Regents-Distinguished Professor at Kansas University and as Stocker Visiting Professor at Ohio University. Dr. Miller wrote the column “PCs for AP and Other EM Reflections” for the AP-S Magazine from 1984 to 2000. He received (with others) a Certificate of Achievement from the IEEE Electromagnetic Compatibility Society for Contributions to Development of NEC (Numerical Electromagnetics Code) and was a recipient (with others) in 1989 of the best paper award given by the Education Society for “Computer Movies for Education.”

Sponsored by the Electromagnetics TIA, School of ECE, Georgia Tech
Co-Sponsored by the IEEE AP/MTT Chapter, Atlanta
Food and refreshments available after the seminar.


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