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Spatial Indexing with a Scale Dimension
1999It is frequently the case that spatial queries require a result set of objects whose scale - however this may be more precisely defined - is the same as that of the query window. In this paper we present an approach which considerably improves query performance in such cases.
Mike Hörhammer, Michael Freeston
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Estimation of local spatial scale
Journal of the Optical Society of America A, 1987The concept of local scale asserts that for a given class of psychophysical measurements, performance at any two visual field locations is equated by magnifying the targets by the local scale associated with each location. Local scale has been hypothesized to be equal to cortical magnification or alternatively to the linear density of receptors or ...
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On the spatial scale of streamers
2014 XXXIth URSI General Assembly and Scientific Symposium (URSI GASS), 2014We calculate the streamer velocity, which is determined by the streamer mechanisms which include electron drift, electron diffusion and photoionization, in a 1D model that also includes the curvature of the ionization front. In particular, we show that the electron drift may contribute only to the propagation of negative streamers, and the effect of ...
Nikolai G. Lehtinen +2 more
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Spatial Scaling Challenge Spatial Scaling Challenge
2022Pacheco-Labrador, Javier +3 more
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Functional Ecology, 1989
Acts in what Hutchinson (1965) has called the 'ecological theatre' are played out on various scales of space and time. To understand the drama, we must view it on the appropriate scale. Plant ecologists long ago recognized the importance of sampling scale in their descriptions of the dispersion or distribution of species (e.g.
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Acts in what Hutchinson (1965) has called the 'ecological theatre' are played out on various scales of space and time. To understand the drama, we must view it on the appropriate scale. Plant ecologists long ago recognized the importance of sampling scale in their descriptions of the dispersion or distribution of species (e.g.
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Spatial scaling in persistence
Physica A: Statistical Mechanics and its Applications, 2002zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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A spatial rainfall generator for small spatial scales
Journal of Hydrology, 2001Abstract A stochastic spatial rainfall generator is developed for use at the small spatial scale of urban and small hydrographic catchments. The generator is based on a spatial rainfall model of the conceptual and hierarchical type. It describes the spatial rainfall field in a macroscopic physically-based way by distinguishing rainfall entities with ...
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A temporal-spatial concept scale
Journal of Clinical Psychology, 1964R R, HARTIGAN, G B, FULLER
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