Results 221 to 230 of about 1,053,086 (266)
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Parametric characterization of the phase at the far field
Optics Letters, 1995By use of the intensity moment formalism, a new tridimensional beam parameter is defined that is rotationally invariant and remains constant under propagation through certain classes of first-order optical systems. The special case of rotationally symmetric beams is considered in some detail.
R, Martínez-Herrero +2 more
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Far field somatosensory potentials in the rat
Electroencephalography and Clinical Neurophysiology, 1977Averaged somatosensory evoked potentials (SEPs) in the rat were recorded from skull electrodes. The cortical component of the SEP was preceded by at least three low amplitude potentials. Surface distribution of these potentials, correlation with depth recording from posterior columns, posterior column nuclei, inferior cerebellar peduncle, medial ...
W C, Wiederholt, V J, Iragui-Madoz
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Far Field Splitting for the Helmholtz Equation
SIAM Journal on Numerical Analysis, 2014Given far field data of a time-harmonic wave radiated by an ensemble of well separated acoustic or electromagnetic sources as well as a priori information on the locations of these sources, we discuss an algorithm to approximate the far field data radiated by each of these sources separately.
Roland Griesmaier +2 more
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2009
Although the microscope image comparator was designed for quantifying the severity of surface imperfections, its ability to measure luminosity values of any image and compare values with images of similar objects suggests there may be other uses for this instrument.
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Although the microscope image comparator was designed for quantifying the severity of surface imperfections, its ability to measure luminosity values of any image and compare values with images of similar objects suggests there may be other uses for this instrument.
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5G antenna characterization in the far-field: How close can far-field be?
2018 IEEE International Symposium on Electromagnetic Compatibility and 2018 IEEE Asia-Pacific Symposium on Electromagnetic Compatibility (EMC/APEMC), 20185G mobile devices and base stations will be operating antenna arrays and beam-steering techniques in the millimeter-wave region. The question of the far-field measurement distance is particularly critical for such technologies as a larger over-the-air test range means dynamic range issues and significantly larger cost.
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Image coding with far-field holograms
Applied Optics, 1978Two image-coding capabilities associated with far-field holograms are analytically and experimentally evaluated. It is demonstrated that preprocessed information concerning the shape of a small object can be efficiently coded into the fringe structure associated with a far-field hologram.
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THE NEAR FIELD TO FAR FIELD TRANSFORMATION
COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 1995If a scattering problem is solved by finite element, finite volume or finite difference methods, it is necessary to predict the far field pattern (or radar cross‐section) by using a near field to far field transformation. Usually this is done using the Stratton‐Chu integral relations, which give the far field pattern in terms of a near field surface ...
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Dynamic response and failure analysis for urban bridges under far-field blast loads
Engineering Structures, 2023Run Zhang, Shanglin Yang
exaly
1974 Antennas and Propagation Society International Symposium, 1974
E. Knott, T. Senior
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E. Knott, T. Senior
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