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检索条件"主题词=source and receiver"
6 条 记 录,以下是1-10 订阅
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Flat topped beams and their characteristics in turbulent media
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OPTICS EXPRESS 2006年 第10期14卷 4196-4207页
作者: Eyyuboglu, Halil Tanyer Arpali, Caglar Baykal, Yahya Kemal Cankaya Univ Elect & Commun Engn Dept TR-06530 Ankara Turkey
The source and receiver plane characteristics of flat topped ( FT) beam propagating in turbulent atmosphere are investigated. To this end, source size, beam power and M(2) factor of source plane FT beam are derived. F... 详细信息
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Performance bounds on synchronous laser line scan systems
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OPTICS EXPRESS 2005年 第3期13卷 738-748页
作者: Jaffe, JS Univ Calif San Diego Scripps Inst Oceanog Marine Phys Lab La Jolla CA 92093 USA
In this article a performance bound is derived for feasible image resolution among a class of imaging systems that can be referred to as synchronous laser line scan systems. Most often, these systems use a narrow beam... 详细信息
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The Fresnel volume and transmitted waves
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GEOPHYSICS 2004年 第3期69卷 653-663页
作者: Spetzler, J Snieder, R Delft Univ Technol Dept Geotechnol NL-2600 GA Delft Netherlands Colorado Sch Mines Dept Geophys Golden CO 80401 USA Colorado Sch Mines Ctr Wave Phenomena Golden CO 80401 USA
In seismic imaging experiments, it is common to use a geometric ray theory that is an asymptotic solution of the wave equation in the high-frequency limit. Con- sequently, it is assumed that waves propagate along in- ... 详细信息
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Ultrasound diffusion for crack depth determination in concrete
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JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2004年 第2期115卷 523-529页
作者: Ramamoorthy, SK Kane, Y Turner, JA Univ Nebraska Dept Engn Mech Lincoln NE 68588 USA
The determination of the depth of surface-breaking cracks in concrete specimens using an ultrasound diffusion technique is discussed. Experiments were carried out on precracked concrete specimens of varying crack dept... 详细信息
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Three-dimensional imaging of multicomponent ground-penetrating radar data
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GEOPHYSICS 2003年 第4期68卷 1241-1254页
作者: van der Kruk, J Wapenaar, CPA Fokkema, JT van den Berg, PM Delft Univ Technol Ctr Tech Geosci Delft Netherlands Delft Univ Technol Dept Appl Earth Sci NL-2628 RX Delft Netherlands
Scalar imaging algorithms originally developed for the processing of remote sensing measurements (e.g., the synthetic-aperture radar method) or seismic reflection data (e.g., the Gazdag phase-shift method) are commonl... 详细信息
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Multiple-point equalization of room transfer functions by using common acoustical poles
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IEEE TRANSACTIONS ON SPEECH AND AUDIO PROCESSING 1997年 第4期5卷 325-333页
作者: Haneda, Y Makino, S Kaneda, Y IEEE
A multiple-point equalization filter using the common acoustical poles of room transfer functions is proposed, The common acoustical poles correspond to the resonance frequencies, which are independent of source and r... 详细信息
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