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the surface gradient is a vector differential operator that is similar to the conventional gradient. The distinction is that the surface gradient takes
Surface_gradient
Multivariate derivative (mathematics)
In vector calculus, the gradient of a scalar-valued differentiable function f {\displaystyle f} of several variables is the vector field (or vector-valued
Gradient
Science of using a material's refractive index for optical effects
flat surfaces, or lenses that do not have the aberrations typical of traditional spherical lenses. Gradient-index lenses may have a refraction gradient that
Gradient-index_optics
Rate of increase in wind strength per unit increase in height
In common usage, wind gradient, more specifically wind speed gradient or wind velocity gradient, or alternatively shear wind, is the vertical component
Wind_gradient
Gradient whose components are spatial derivatives
Image gradient Time derivative Material derivative Structure tensor Surface gradient Kreyszig, E. (1999). Advanced Engineering Mathematics. Wiley. ISBN 978-0-471-15496-9
Spatial_gradient
Rate of temperature increase with depth in Earth's interior
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
Geothermal_gradient
Angle to the horizontal plane
The grade (US) or gradient (UK) (also called slope, incline, mainfall, pitch or rise) of a physical feature, landform or constructed line is either the
Grade_(slope)
Analysis of terrain
disadvantages. The surface normal at any point on the terrain surface is a vector ray that is perpendicular to the surface. The surface gradient ( ∇ f {\displaystyle
Geomorphometry
Temperature difference per unit of length
The absorption of solar light at or near the planetary surface increases the temperature gradient and may result in convection (a major process of cloud
Temperature_gradient
Concept in fluid dynamics
of a liquid due to gradients in the surface tension of the liquid. Diffusion is of whatever is creating the gradient in the surface tension. Thus as the
Marangoni_number
Compass direction that a slope faces
is complemented by grade (or inclination angle) to characterize the surface gradient. Aspect can have a strong influence on temperature. This is because
Aspect_(geography)
Term in road design
Drainage gradient (DG) is a term in road design, defined as the combined slope due to road surface cross slope (CS) and longitudinal slope (hilliness)
Drainage_gradient
Optimization algorithm
Gradient descent is a method for unconstrained mathematical optimization. It is a first-order iterative algorithm for minimizing a differentiable multivariate
Gradient_descent
Physical phenomenon between two fluids
regions of low surface tension. The surface tension gradient can be caused by concentration gradient or by a temperature gradient (surface tension is an
Marangoni_effect
Force resulting from a difference in pressure across a surface
fluid mechanics, the pressure-gradient force is the force that results when there is a difference in pressure across a surface. In general, a pressure is
Pressure-gradient_force
Line or vector perpendicular to a curve or a surface
y,z)} on the surface is given by the gradient n = ∇ F ( x , y , z ) . {\displaystyle \mathbf {n} =\nabla F(x,y,z).} since the gradient at any point is
Normal_(geometry)
Mathematical descriptions of molecular diffusion
substrate surface and a near-surface concentration gradient is never formed; It can also be used to predict the adsorption rate of molecules on the surface when
Fick's_laws_of_diffusion
Space rate of variation of pressure in a given direction
gradient is a two-dimensional vector resulting from the projection of the pressure gradient onto a local horizontal plane. Near the Earth's surface,
Pressure_gradient
Unsorted glacial sediment
flow tills vary, and can depend on factors such as water content, surface gradient, and debris characteristics. Generally, flow tills with a higher water
Till
Physical phenomenon
"surface waves" in that they can be guided along with a refractive index gradient or along an interface between two media having different dielectric constants
Surface_wave
Computer vision framework
Gradient vector flow (GVF), a computer vision framework introduced by Chenyang Xu and Jerry L. Prince, is the vector field that is produced by a process
Gradient_vector_flow
Variation of the redox potential with distance (or depth)
with an oxidizing environment at the surface and increasingly reducing conditions below the surface. Redox gradients are generally understood at the macro
Redox_gradient
Elliptic partial differential equation
difference between V and the gradient of f. In order to effectively apply Poisson's equation to the problem of surface reconstruction, it is necessary
Poisson's_equation
Evaluates a line integral through a gradient field using the original scalar field
The gradient theorem, also known as the fundamental theorem of calculus for line integrals, says that a line integral through a gradient field can be evaluated
Gradient_theorem
Third planet from the Sun
being an ocean world, the only one in the Solar System sustaining liquid surface water. Almost all of Earth's water is contained in its ocean, which covers
Earth
Type of gradient noise in computer graphics
Perlin noise is a type of gradient noise developed by Ken Perlin in 1982. It has many uses, including but not limited to: procedurally generating terrain
Perlin_noise
Sustainable energy from sea and river water
Osmotic power, salinity gradient power or blue energy is the energy available from the difference in the salt concentration between seawater and river
Osmotic_power
Optimization algorithm for artificial neural networks
In machine learning, backpropagation is a gradient computation method commonly used for training a neural network in computing parameter updates. It is
Backpropagation
Rate of change of speed of sound with distance
inversely proportional to the gradient. When the sun warms the Earth's surface, there is a negative temperature gradient in atmosphere. The speed of sound
Sound_speed_gradient
Natural movement of air or other gases relative to a planet's surface
windsurfing. In gliding, wind gradients just above the surface affect the takeoff and landing phases of flight of a glider. Wind gradient can have a noticeable
Wind
Aspects of fluid mechanics involving fluid flow
describe a layer of relatively inviscid fluid with a free surface, in which surface gradients are small. Darcy's law is used for flow in porous media,
Fluid_dynamics
Surface slope along a watercourse
Stream gradient (or stream slope) is the grade (or slope) of a stream. It is measured by the ratio of drop in elevation and horizontal distance. It is
Stream_gradient
Detachment of a boundary layer from a surface into a wake
gradient d u o / d s ( s ) < 0 {\displaystyle du_{o}/ds(s)<0} along the surface, which in turn is directly related to the pressure and its gradient by
Flow_separation
Mathematical identities
{\displaystyle f(x,y,z)} in three-dimensional Cartesian coordinate variables, the gradient is the vector field: grad ( f ) = ∇ f = ( ∂ ∂ x , ∂ ∂ y , ∂ ∂ z )
Vector_calculus_identities
Surface representing the interface between two different fluids
\gamma } is the surface tension associated with the interface, and ∇ S {\displaystyle \scriptstyle \nabla _{S}} is the surface gradient. Note that the
Capillary_surface
surface, where the flow is driven by a concentration gradient in the solution. This is distinct from flow relative to a surface driven by a gradient in
Diffusiophoresis and diffusioosmosis
Diffusiophoresis_and_diffusioosmosis
Lowest part of the atmosphere directly influenced by contact with the planetary surface
affected by surface drag and turns across the isobars (see Ekman layer for more detail). Typically, due to aerodynamic drag, there is a wind gradient in the
Planetary_boundary_layer
Concept in atmospheric science
reflects the horizontal pressure gradient as the driving force of atmospheric motion, while the actual near-surface wind requires the synergistic modulation
Geostrophic_wind
Study of mathematical algorithms for optimization problems
only (sub)gradient information and others of which require the evaluation of Hessians. Methods that evaluate gradients, or approximate gradients in some
Mathematical_optimization
Derivative of a function with multiple variables
} This vector is called the gradient of f at a. If f is differentiable at every point in some domain, then the gradient is a vector-valued function ∇f
Partial_derivative
Physical quantity
fluids or Euler equations (fluid dynamics) for ideal inviscid fluid, the gradient of pressure becomes a function of body forces only. The Navier-Stokes momentum
Hydrostatic_pressure
Vector difference of geostrophic wind movement at high and low altitudes
unit vector, and the subscript "p" on the gradient operator denotes gradient on a constant pressure surface) with respect to pressure, and integrate from
Thermal_wind
Electric charges present on the surface of a solid
of the surface charge. Using the one-dimensional Poisson equation and assuming that, at an infinitely great distance, the potential gradient is equal
Surface_charge
Model of atmospheric motion
to allow for different surface roughness.) In the cross-stream momentum equation, the Coriolis force and normal pressure gradient are both negligible, leading
Balanced_flow
Vehicle dynamics terms
if the understeer gradient is positive, oversteer if the understeer gradient is negative, and neutral steer if the understeer gradient is zero. Car and
Understeer_and_oversteer
Operation in mathematical calculus
general manifolds (curves, surfaces, and their higher-dimensional analogs). The exterior derivative plays the role of the gradient and curl of vector calculus
Integral
Pressure gradient in which pressure increases in the direction of fluid flow
along the surface and hence the lift and drag characteristics. Turbulent boundary layers tend to be able to sustain an adverse pressure gradient better than
Adverse_pressure_gradient
Process of water movement through a plant
the hydraulic conductivity of the soil and the magnitude of the pressure gradient through the soil. Both of these factors influence the rate of bulk flow
Transpiration
Theorem in vector calculus
curl of the vector field over some surface, to the line integral of the vector field around the boundary of the surface. The classical theorem of Stokes
Stokes'_theorem
Layer where the density gradient is greatest within a body of water
A pycnocline is the cline or layer where the density gradient (∂ρ/∂z) is greatest within a body of water. An ocean current is generated by the forces
Pycnocline
Unit of gravitational gradient
so the sum of gravity gradient along any three perpendicular directions is 0. Near the surface of earth, the equipotential surface is nearly spherical,
Eotvos_(unit)
Technique in analytical chemistry
phase to reduce the surface tension of water. Gradient elution uses this effect by automatically reducing the polarity and the surface tension of the aqueous
High-performance liquid chromatography
High-performance_liquid_chromatography
Circulation density in a vector field
reveals the relation between curl (rotor), divergence, and gradient operators. Unlike the gradient and divergence, curl as formulated in vector calculus does
Curl_(mathematics)
Distinct layer of temperature change in a body of water
water, as in an ocean or lake; or air, e.g. an atmosphere) with a high gradient of distinct temperature differences associated with depth. In the ocean
Thermocline
Difference in wind speed or direction over a short distance
shear (/ʃɪər/; also written windshear), sometimes referred to as wind gradient, is a difference in wind speed and/or direction over a relatively short
Wind_shear
Theorem in calculus
through a closed surface to the divergence of the field in the volume enclosed. More precisely, the divergence theorem states that the surface integral of
Divergence_theorem
Vector operator in vector calculus
{G} ).} The Laplacian of a scalar field is the divergence of the field's gradient: div ( grad φ ) = Δ φ . {\displaystyle \operatorname {div} (\operatorname
Divergence
In linguistics, conformity with grammar
whether a particular word, phrase, or clause is well-formed. This problem of gradient well-formedness, uncertainty about the well-formedness of a particular
Well-formedness
Region in space where every point is at the same potential
an equipotential surface (or potential isosurface), but it can also be a three-dimensional mathematical solid in space. The gradient of the scalar potential
Equipotential
Measure of misalignment between the gradients of pressure and density in a fluid
a stratified fluid is a measure of how misaligned the gradient of pressure is from the gradient of density in a fluid. In meteorology, a baroclinic flow
Baroclinity
Frontal feature in the South Atlantic Ocean
narrow band of latitudes and is characterized by strong horizontal gradients in sea surface temperature and salinity. The ABF has a variable morphology, geographic
Angola–Benguela_Front
Measure of electric field through surface
on an electric charge at any point in space. The electric field is the gradient of the electric potential. An electric charge, such as a single electron
Electric_flux
Matrix of partial derivatives of a vector-valued function
scalar-valued function of several variables is (the transpose of) its gradient and the gradient of a scalar-valued function of a single variable is its derivative
Jacobian matrix and determinant
Jacobian_matrix_and_determinant
Statistical approach
Box–Behnken design Central composite design Gradient-enhanced kriging (GEK) IOSO method based on response-surface methodology Optimal designs Plackett–Burman
Response_surface_methodology
Optical illusion caused by bending of light
the variation between the hot air at the surface of the road and the denser cool air above it causes a gradient in the refractive index of the air. This
Mirage
Deviation from the normal change of an atmospheric property with altitude
conditions, the normal vertical temperature gradient is inverted so that the air is colder near the surface of the Earth. This can occur when, for example
Inversion_(meteorology)
Four-vector analogue of the gradient operation
geometry, the four-gradient (or 4-gradient) ∂ {\displaystyle {\boldsymbol {\partial }}} is the four-vector analogue of the gradient ∇ → {\displaystyle
Four-gradient
Differentiation under the integral sign formula
derivative of the vector field, Σ is a surface bounded by the closed curve ∂Σ, dA is a vector element of the surface Σ, ds is a vector element of the curve
Leibniz_integral_rule
Boundary between two distinct water masses
determined using gradient thresholding: the position of the front is determined based on where the spatial gradient of a quantity, such as sea-surface height or
Front_(oceanography)
Ionization of air around a high-voltage conductor
field (potential gradient) at the surface of the conductor exceeds a critical value, the dielectric strength or disruptive potential gradient of the fluid
Corona_discharge
Biological membrane that separates the interior of a cell from its outside environment
and is propelled by the concentration gradient created by each side of the membrane. Such a concentration gradient across a semipermeable membrane sets
Cell_membrane
Anti-reflective surface
surfaces in the form of cones produces highly water-repellent surfaces. These nano-cone textures are superhydrophobic or super-water-hating. Gradient
Nanotextured_surface
Curve along which a 3-D surface is at equal elevation
hypothetical surface with one or more horizontal planes. The configuration of these contours allows map readers to infer the relative gradient of a parameter
Contour_line
State of balance between external forces on a fluid and internal pressure gradient
as gravity, are balanced by a pressure-gradient force. In the planetary physics of Earth, the pressure-gradient force prevents gravity from collapsing
Hydrostatic_equilibrium
with respect to an adjacent charged surface. This force might be electric, pressure gradient, concentration gradient, or gravity. In addition, the moving
Electrokinetic_phenomena
Vertical rate of change of temperature in atmosphere
extremely small lapse rate, the Tolman gradient (derived by R. C. Tolman in 1930). At Earth's surface, the Tolman gradient would be about Γ t = T s × ( 10 −
Lapse_rate
Instantaneous rate of change (mathematics)
real-valued function of several variables, the Jacobian matrix reduces to the gradient vector. A function of a real variable f ( x ) {\displaystyle f(x)} is differentiable
Derivative
Integration over a non-flat region in 3D space
particularly multivariable calculus, a surface integral is a generalization of multiple integrals to integration over surfaces. It can be thought of as the double
Surface_integral
Definite integral of a scalar or vector field along a path
scattering theory. Divergence theorem Gradient theorem Methods of contour integration Nachbin's theorem Line element Surface integral Volume element Volume integral
Line_integral
City in Metro Manila, Philippines
specifically in the Canumay district. This hilly terrain, characterized by a surface gradient of approximately 0.55%, features a gentle slope that contributes to
Valenzuela,_Metro_Manila
Ramp from elevated sidewalk to road
inches (10–15 cm) above the street surface) a curb cut is finished at an intermediate gradient that connects both surfaces, sometimes with tactile paving
Curb_cut
Differential calculus on function spaces
suggests that if we can find a function ψ {\displaystyle \psi } whose gradient is given by P , {\displaystyle P,} then the integral A {\displaystyle A}
Calculus_of_variations
Two-dimensional manifold
function from R3 to R whose gradient is nowhere zero, then the locus of zeros of f does define a surface, known as an implicit surface. If the condition of non-vanishing
Surface_(topology)
Type of weather map
at the leading edge of a sharp temperature gradient on an isotherm analysis, often marked by a sharp surface pressure trough. Cold fronts can move up to
Surface_weather_analysis
Meteorological concept
the influence from the surface and the boundary layer is negligible. Although the framework is formulated with the gradients of free tropospheric temperature
Weak temperature gradient approximation
Weak_temperature_gradient_approximation
Optimization algorithm
differs from gradient descent methods, which adjust all of the values in x {\displaystyle \mathbf {x} } at each iteration according to the gradient of the hill
Hill_climbing
Differential operator in mathematics
or Laplacian is a differential operator given by the divergence of the gradient of a scalar function on Euclidean space. It is usually denoted by the symbols
Laplace_operator
Corrective lens used in eyeglasses
the bottom of the lens. The length of the progressive power gradient on the lens surface depends on the design of the lens, with a final addition power
Progressive_lens
Device used to produce magnetic fields
a device for producing a large volume of almost constant (or constant-gradient) magnetic field. It is named in honour of the Scottish physicist James
Maxwell_coil
Oil field in Kern County, California
generally into the irrigation canal system, but because of the flat surface gradient most rainfall soaks directly into the ground. The air quality in the
Edison_Oil_Field
Transport of dissolved species from the highest to the lowest concentration region
concentration to a region of lower concentration. Diffusion is driven by a gradient in Gibbs free energy or chemical potential. It is possible to diffuse "uphill"
Diffusion
Layer of a turbulent fluid affected by interaction with a surface
from the interface. Surface layers are characterized by large normal gradients of tangential velocity and large concentration gradients of any substances
Surface_layer
Weather or lab measurements
Antarctic where surface temperatures drop to approximately −98 °C (−144 °F; 175 K). Due to the very strong temperature gradient near the surface, these imply
Lowest temperature recorded on Earth
Lowest_temperature_recorded_on_Earth
Short-term state of the atmosphere
expand and lower the density and the resulting surface air pressure. The resulting horizontal pressure gradient moves the air from higher to lower pressure
Weather
Body of salt water covering most of Earth
towards the surface. Deep ocean water has a temperature between −2 °C (28 °F) and 5 °C (41 °F) in all parts of the globe. The temperature gradient over the
Ocean
Fluid surface of constant density
isopycnic surface is a surface of constant density inside a fluid. Isopycnic surfaces contrast with isobaric or isothermal surfaces, which describe surfaces of
Isopycnic
Device for prevention of corona discharge on high-voltage equipment
field (potential gradient) at the surface of conductors exceeds a critical value, the dielectric strength or disruptive potential gradient of air. Its value
Corona_ring
Field of engineering
employed classical gradient-based methods to structural optimization problems. The method of usable feasible directions, Rosen's gradient projection (generalized
Multidisciplinary design optimization
Multidisciplinary_design_optimization
Boundary separating two masses of air of different densities
warm side of a tightly packed temperature gradient. On surface analysis charts, this temperature gradient is visible in isotherms and can sometimes also
Weather_front
Matrix of second derivatives
function f {\displaystyle f} is the transpose of the Jacobian matrix of the gradient of the function f {\displaystyle f} ; that is: H ( f ( x ) ) = J ( ∇ f
Hessian_matrix
SURFACE GRADIENT
SURFACE GRADIENT
Boy/Male
Indian
Part of Sun
Boy/Male
Irish
Surname.
Surname or Lastname
Probably an Americanized spelling of the Swiss German surname Bunz (see Bunce).English
Probably an Americanized spelling of the Swiss German surname Bunz (see Bunce).English : possibly a variant of Bunt.
Boy/Male
Irish Gaelic
Surname.
Boy/Male
Irish
Surname.
Boy/Male
Irish American Biblical Hebrew
Surname.
Boy/Male
Irish American Welsh
Surname.
Boy/Male
Irish
Surname.
Boy/Male
Irish American Welsh Scandinavian Scottish English
Surname.
Boy/Male
Scottish American English
Surname.
Boy/Male
Irish American English
Surname.
Boy/Male
Irish
Surname.
Boy/Male
Irish
Surname.
Boy/Male
Indian, Sanskrit
Surface of the Earth
Surname or Lastname
English (Cumbria and Durham)
English (Cumbria and Durham) : variant spelling of Furness.
Boy/Male
Irish
Surname.
Boy/Male
Irish
Surname.
Boy/Male
Irish Gaelic
Surname.
Boy/Male
Irish
Surname.
Boy/Male
Irish
Surname.
SURFACE GRADIENT
SURFACE GRADIENT
Biblical
motion
Boy/Male
Arabic, Muslim
Servant of the Mighty
Surname or Lastname
English
English : derivative of Waple (a variant of Walpole).
Boy/Male
Hindi
One-of-a-kind; unique.
Girl/Female
Hindu
Very pretty, Lovely, Sweet
Girl/Female
Australian, Hebrew, Italian
God Sees; Form of Jessica
Boy/Male
American, British, English, French, German, Italian
Protector of Prosperity; Happy Defender; Wealthy Protector
Girl/Female
Indian, Telugu
Lucky
Boy/Male
English American
Grove dweller. Used as both surname and given name. Famous bearer: American president Grover...
Boy/Male
Hindu, Indian, Tamil
King of the Direction; Sky
SURFACE GRADIENT
SURFACE GRADIENT
SURFACE GRADIENT
SURFACE GRADIENT
SURFACE GRADIENT
p. pr. & vb. n.
of Surface
n.
Surface; superficies; externality.
n.
An instrument for gauging or testing a plane surface. See Surface gauge, under Surface.
n.
A form of machine for dressing the surface of wood, metal, stone, etc.
n.
Alt. of Serfdom
imp. & p. p.
of Surface
n.
A magnitude that has length and breadth without thickness; superficies; as, a plane surface; a spherical surface.
v. t.
To give a surface to; especially, to cause to have a smooth or plain surface; to make smooth or plain.
v. t.
To work over the surface or soil of, as ground, in hunting for gold.
n.
That part of the side which is terminated by the flank prolonged, and the angle of the nearest bastion.
n.
Surface; body; substance.
n.
To throw out, or exhale, as from a furnace; also, to put into a furnace.
a.
meeting a curve or surface at a point and having at that point the same direction as the curve or surface; -- said of a straight line, curve, or surface; as, a line tangent to a curve; a curve tangent to a surface; tangent surfaces.
n.
An inclosed place in which heat is produced by the combustion of fuel, as for reducing ores or melting metals, for warming a house, for baking pottery, etc.; as, an iron furnace; a hot-air furnace; a glass furnace; a boiler furnace, etc.
v. t.
To name or call by an appellation added to the original name; to give a surname to.
n.
The exterior part of anything that has length and breadth; one of the limits that bound a solid, esp. the upper face; superficies; the outside; as, the surface of the earth; the surface of a diamond; the surface of the body.
n.
Hence, outward or external appearance.
a.
Having the surface smooth and polished; -- said of leaves, the surfaces of shells, etc.