Results 281 to 290 of about 4,913,721 (332)
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Journal of Irrigation and Drainage Engineering, 1984
Forty contiguous plots (each 27.5m×3.2m) were maintained in a cultivated fallow condition during spring and summer 1981. Twenty‐six runoff events were measured during that period. The runoff variability as expressed by differences between plots was analyzed.
Allen T. Hjelmfelt, Robert E. Burwell
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Forty contiguous plots (each 27.5m×3.2m) were maintained in a cultivated fallow condition during spring and summer 1981. Twenty‐six runoff events were measured during that period. The runoff variability as expressed by differences between plots was analyzed.
Allen T. Hjelmfelt, Robert E. Burwell
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Joint variable spatial downscaling
Climatic Change, 2011Joint Variable Spatial Downscaling (JVSD), a new statistical technique for downscaling gridded climatic variables, is developed to generate high resolution gridded datasets for regional watershed modeling and assessments. The proposed approach differs from previous statistical downscaling methods in that multiple climatic variables are downscaled ...
Feng Zhang, Aris P. Georgakakos
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Spatial image variability analysis
The 2002 45th Midwest Symposium on Circuits and Systems, 2002. MWSCAS-2002., 2003In our analysis, each image is partitioned into a number of non-overlapping, spatial regions. Each spatial region is viewed as a Region of Interest (ROI). A grade is assigned to each ROI from a set of independent raters. The model is applied in lung image analysis, where a grade of 0/1 is assigned to each ROI.
M.S. Pattichis, T. Cacoullos, P. Soliz
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Spatial Variability of Phosphate Adsorption Parameters
Journal of Environmental Quality, 1988AbstractReversible phosphate (designated P) adsorption for acid soils with a narrow pH range is described with the Langmuir kinetics equation. Using a combination of two experimental desorption techniques, i.e., desorption in water and desorption in the presence of an “infinite” sink for P, respectively, the adsorption maximum (Qm) and the adsorption ...
van der Zee, S.E.A.T.M. +3 more
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Spatial variability in airborne pollen concentrations
Journal of Allergy and Clinical Immunology, 1975Tests were conducted to determine the relationship between airborne pollen concentrations and distance. Simultaneous samples were taken in 171 tests with sets of eight rotoslide samplers spaced from one to 486 M. apart in straight lines. Use of all possible pairs gave 28 separation distances. Tests were conducted over a 2-year period in urban and rural
G S, Raynor, E C, Ogden, J V, Hayes
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Spatial variability of pesticide adsorption parameters
Environmental Science & Technology, 1986Comparaison des mesures d'adsorption de napropamide par deux methodes differentes: en discontinu jusqu'a equilibre et en ecoulement ...
H, Elabd, W A, Jury, M M, Cliath
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MR imaging with spatially variable resolution
Journal of Magnetic Resonance Imaging, 1992AbstractIn some situations it may be advantageous to produce “locally focused” magnetic resonance images that have nonuniform spatial resolution matching the expected local rate of spatial variation in the object. Because such an image has fewer pixels than a conventional image with uniformly high resolution, it can be reconstructed from fewer signals,
Y, Cao, D N, Levin
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Some Variables Affecting Children's Spatial Conservation
Child Development, 1973DUNCAN, BARBARA, and ELIOT, JOHN. Some Variables Affecting Children's Spatial Conservation. CHILD DEVELOPMENT, 1973, 44, 828-830. This study explores the possibilities of using Kershner's spatial test with young children and seeks correlations with other tasks involving visual skills and dimensionality.
B, Duncan, J, Eliot
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Environmental Mapping Based on Spatial Variability
Journal of Environmental Quality, 2002ABSTRACTEnvironmental maps show the probable environmental states of different types of land use or development of landscape in a geographic context. Remotely sensed data are particularly efficient for environmental mapping in order to outline major environmental types.
Nelley, Kovalevskaya, Vladimir, Pavlov
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Annals of the Association of American Geographers, 1979
ABSTRACT Place-to-place variation within soil units influences the study and use of soil, but is seldom formally acknowledged in soil maps and descriptions. Research on soil variation could be improved by increased coordination of experimental designs and by application of statistical methods suitable for analysis of place-to-place variation, including
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ABSTRACT Place-to-place variation within soil units influences the study and use of soil, but is seldom formally acknowledged in soil maps and descriptions. Research on soil variation could be improved by increased coordination of experimental designs and by application of statistical methods suitable for analysis of place-to-place variation, including
openaire +1 more source