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Spatial gradient information


A spatial gradient is a gradient whose components are spatial derivatives, i.e., rate of change of a given scalar physical quantity with respect to the position coordinates in physical space. Homogeneous regions have spatial gradient vector norm equal to zero. When evaluated over vertical position (altitude or depth), it is called vertical derivative or vertical gradient; the remainder is called horizontal gradient component, the vector projection of the full gradient onto the horizontal plane.

Examples:

Biology
  • Concentration gradient, the ratio of solute concentration between two adjoining regions
  • Potential gradient, the difference in electric charge between two adjoining regions
Fluid dynamics and earth science
  • Density gradient
  • Pressure gradient
  • Temperature gradient
    • Geothermal gradient
    • Sound speed gradient
  • Wind gradient
  • Lapse rate

and 26 Related for: Spatial gradient information

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Spatial gradient

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A spatial gradient is a gradient whose components are spatial derivatives, i.e., rate of change of a given scalar physical quantity with respect to the...

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Temperature gradient

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changes the most rapidly around a particular location. The temperature spatial gradient is a vector quantity with dimension of temperature difference per unit...

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Geothermal gradient

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Geothermal gradient is the rate of change in temperature with respect to increasing depth in Earth's interior. As a general rule, the crust temperature...

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Gradient

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analogue of the gradient operation Hessian matrix – (Mathematical) matrix of second derivatives Skew gradient Spatial gradient – Gradient whose components...

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Pressure gradient

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generally of the fluid under investigation). The pressure gradient is defined only at these spatial scales at which pressure (more generally fluid dynamics)...

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Potential gradient

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biology, a potential gradient is the local rate of change of the potential with respect to displacement, i.e. spatial derivative, or gradient. This quantity...

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Wind gradient

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wind gradient, more specifically wind speed gradient or wind velocity gradient, or alternatively shear wind, is the vertical component of the gradient of...

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Density gradient

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Density gradient is a spatial variation in density over an area. The term is used in the natural sciences to describe varying density of matter, but can...

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Gravity gradiometry

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Earth's gravity field via measurements of the spatial gradient of gravitational acceleration. The gravity gradient tensor is a 3x3 tensor representing the partial...

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Finite strain theory

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{F} ^{-1}\,\!} , where H {\displaystyle \mathbf {H} } is the spatial deformation gradient tensor. Then, by the implicit function theorem, the Jacobian...

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Gravitational field

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a field model, rather than a point attraction. It results from the spatial gradient of the gravitational potential field. In general relativity, rather...

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Surface gradient

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purposes. Aspect (geography) Geomorphometry#Surface gradient Derivatives Grade (slope) Spatial gradient R. Shankar Subramanian, Boundary Conditions in Fluid...

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Lapse rate

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circumstances. Lapse rate corresponds to the vertical component of the spatial gradient of temperature. Although this concept is most often applied to the...

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Flow velocity

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(mechanics) Drift velocity Enstrophy Group velocity Particle velocity Pressure gradient Strain rate Strain-rate tensor Stream function Velocity potential Vorticity...

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Gravitational acceleration

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a field model, rather than a point attraction. It results from the spatial gradient of the gravitational potential field. In general relativity, rather...

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Material derivative

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(generalizations) Lie derivative Levi-Civita connection Spatial acceleration Spatial gradient Bird, R.B.; Stewart, W.E.; Lightfoot, E.N. (2007). Transport...

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Redox gradient

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based on the free energy gained from redox pairs. These redox gradients form both spatially and temporally as a result of differences in microbial processes...

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Pom1

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the cell. Pom1 forms a spatial gradient as cells elongate throughout G2 phase. Figure 1 illustrates in cartoon form the gradient of Pom1 (shown by the...

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Geodetic astronomy

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integration of vertical deflection, as it represents the horizontal spatial gradient of the geoid undulation. Arc measurement Astronomy, stellar triangulation...

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Thermoelectric effect

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and so a spatial gradient in temperature can result in a gradient in the Seebeck coefficient. If a current is driven through this gradient, then a continuous...

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Functional magnetic resonance imaging

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brain region being studied. Another magnetic field, the gradient field, is then applied to spatially locate different nuclei. Finally, a radiofrequency (RF)...

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Sound speed gradient

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In acoustics, the sound speed gradient is the rate of change of the speed of sound with distance, for example with depth in the ocean, or height in the...

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Magnetic separation

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particle with relative permeability mu sub (pr) is proportional to the spatial gradient of the square of the magnetic flux density. The formula can be used...

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Thermal conduction

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other, but after a state of steady-state conduction is reached, the spatial gradient of temperatures along the bar does not change any further, as time...

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Histogram of oriented gradients

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The histogram of oriented gradients (HOG) is a feature descriptor used in computer vision and image processing for the purpose of object detection. The...

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Visual spatial attention

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within the boundaries of a zoom-lens. The Gradient Model is an alternative theory on the distribution of spatial attention. This model proposes that attentional...

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