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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

BACKWARD PROPAGATION BASED ALGORITHMS FOR HIGH-PERFORMANCE IMAGE FORMATION

Lee, Hua, Lockwood, Stephanie, Tandon, James, Brown, Andrew 10 1900 (has links)
International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, California / In this paper, we present the recent results of theoretical development and software implementation of a complete collection of high-performance image reconstruction algorithms designed for high-resolution imaging for various data acquisition configurations.
2

[en] ANALYSIS OF GAIN REDUCTION FACTOR FOR CIRCULAR APERTURES LOCATED IN THE FRESNEL REGION / [pt] ANÁLISE DO FATOR DE REDUÇÃO DE GANHO PARA ABERTURAS CIRCULARES SITUADAS EM REGIÃO DE FRESNEL

EDSON PETTERSEN MARCONI 30 May 2007 (has links)
[pt] A presente tese analisa o problema da redução de ganho entre aberturas circulares situadas em região de Fresnel, tendo como objetivo a determinação do fator de correção a ser introduzido nas medidas de ganho em campo próximo. Para duas diferentes famílias de iluminação nas aberturas, são apresentados um conjunto de tabelas para o fator de redução de ganho bem côo suas curvas correspondentes. / [en] The following work analyzes the problem of gain reduction between circular apertures located in the Fresnel region, and aims to determine the correction factor to be applied when measuring near field gains. Two different sets of aperture illumination forms are presented, for which sets of tables of the reduction factor as well as the corresponding curves have been developd.

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