منابع مشابه
Centennial rainfall variation in semi arid and tropical humid environments in the cardamom hill slopes, southern Western Ghats, India
Studies of rainfall variation generally focus on large areas. For example, in India, the area average monsoon rainfall series of the whole country or meteorological subdivisions are used. This would be of no use for local agriculture, particularly in places where rainfall is very high or very low, especially for crops like small cardamom and vanilla which are very sensitive to soil moisture and...
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Let F be a quadratically constrained, possibly nonconvex, bounded set, and let E1, . . . , El denote ellipsoids contained in F with non-intersecting interiors. We prove that minimizing an arbitrary quadratic q(·) over G := F\∪k=1 int(Ek) is no more difficult than minimizing q(·) over F in the following sense: if a given semidefinite-programming (SDP) relaxation for min{q(x) : x ∈ F} is tight, t...
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The calculation of slope (downhill gradient) for a point in a digital elevation model (DEM) is a common procedure in the hydrological, environmental and remote sensing sciences. The most commonly used slope calculation algorithms employed on DEM topography data make use of a three-by-three search window or kernel centered on the grid point (grid cell) in question in order to calculate the slope...
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Let rm and rM be the least and greatest finite boundary slopes of a hyperbolic knot K in S . We show that any cyclic surgery slopes of K must lie in the interval (rm − 1/2, rM + 1/2). AMS Classification 57M25; 57M27
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Observations of flow over hollows (bathymetric depressions) at various estuarine systems suggest that their speed increases locally at the deepest part. Numerical experiments were carried out to investigate the reason for this acceleration. Results show that the flow is convergent before and then divergent after it passes over the hollow. However, the simulated current speeds in the hollow decr...
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ژورنال
عنوان ژورنال: Nature
سال: 1988
ISSN: 0028-0836,1476-4687
DOI: 10.1038/336201a0