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Spatially dependent optical bistability
Journal of the Optical Society of America B, 2022The effect of the orbital angular momentum (OAM) of light beams on the optical bistability (OB) phenomenon has been investigated in a three-level quantum system. In a first step, we consider a Λ -type configuration in which the coupling field is assumed as a Laguerre–Gaussian (LG) beam.
Seyed Morteza Mousavi +3 more
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Spatial Interaction Models and Spatial Dependence
2011Spatial interaction models of the types discussed in the previous chapter take the view that inclusion of a spatial separation function between origin and destination locations is adequate to capture any spatial dependence in the sample data. LeSage and Pace (J Reg Sci 48(5):941–967, 2008), and Fischer and Griffith (J Reg Sci 48(5):969–989, 2008 ...
Fischer, Manfred M., Wang, Jinfeng
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Orientation discrimination depends on spatial frequency
Vision Research, 1991Thresholds were measured for discriminating the orientation of sinusoidal gratings of varying spatial frequency, and found to decrease monotonically with increasing spatial frequency. For discrimination of high-contrast (10 times threshold) near-vertical gratings, thresholds ranged from about 1 deg at 0.04 c/deg to 0.5 deg at 0.2 c/deg, after which ...
BURR, DAVID CHARLES, S. A. WIJESUNDRA
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Spatially dependent ACLR modelling
2014 IEEE Conference on Antenna Measurements & Applications (CAMA), 2014In a multi-antenna transmitter system, the effective combined signal in the air will consist of a combination of signals. These signals will for example experience different path loss and then be combined at the receiver location. This results in a combined signal that may be different than a conducted signal at the antenna port. This model was used to
Esther Sienkiewicz +4 more
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2009
Rather than geometrical weighting functions as in Chapter 2, it is preferable to obtain spatial dependence function from a set of measurements points. Prior to such a functional derivation, it is necessary to examine the isotropy and homogeneity of the spatial data directionally and the point-wise features of the regionalized variable (ReV). The basics
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Rather than geometrical weighting functions as in Chapter 2, it is preferable to obtain spatial dependence function from a set of measurements points. Prior to such a functional derivation, it is necessary to examine the isotropy and homogeneity of the spatial data directionally and the point-wise features of the regionalized variable (ReV). The basics
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Forecasting with Spatial Dependencies
2017With the explosion of computerized mapping and spatial modeling techniques over the last 30 years, there has been increased interest in developing small-area demographic estimation and forecasting models that incorporate spatial dependencies among geographic units.
Jack Baker +3 more
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Spatial Dependence and Autocorrelation
2018The detection, characterization, and significance testing of spatial pattern is the first step to understand spatial ecological data and the processes that generated them. Spatial dependence commonly occurs in ecological data and it is often argued that failure to account for spatial dependence can impact inferences in ecology and guidance for ...
Robert Fletcher, Marie-Josée Fortin
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