gradient
n . 倾斜度,坡度,升降率
a . 倾斜的,步行的
倾斜度,坡度,升降率倾斜的,步行的
gradient 梯度
gradient 梯度
gradient n 1 :
a graded change in the magnitude of some physical quantity or dimension 2 :
the property possessed by a line or surface that departs from the horizontal ; "
a five -
degree gradient " [
synonym : {
gradient },
{
slope }]
Gradient \
Gra "
di *
ent \,
a . [
L .
gradiens ,
p .
pr .
of gradi to step ,
to go .
See {
Grade }.]
1 .
Moving by steps ;
walking ;
as ,
gradient automata .
--
Wilkins .
[
1913 Webster ]
2 .
Rising or descending by regular degrees of inclination ;
as ,
the gradient line of a railroad .
[
1913 Webster ]
3 .
Adapted for walking ,
as the feet of certain birds .
[
1913 Webster ]
Gradient \
Gra "
di *
ent \,
n .
1 .
The rate of regular or graded ascent or descent in a road ;
grade .
[
1913 Webster ]
2 .
A part of a road which slopes upward or downward ;
a portion of a way not level ;
a grade .
[
1913 Webster ]
3 .
The rate of increase or decrease of a variable magnitude ,
or the curve which represents it ;
as ,
a thermometric gradient .
4 . (
Chem .,
Biochem .)
The variation of the concentration of a chemical substance in solution through some linear path ;
also called concentration gradient ; --
usually measured in concentration units per unit distance .
Concentration gradients are created naturally ,
e .
g .
by the diffusion of a substance from a point of high concentration toward regions of lower concentration within a body of liquid ;
in laboratory techniques they may be made artificially .
[
PJC ]
{
gradient maker } (
Biochem .)
a device which creates a concentration gradient in a solution within some apparatus ; --
used ,
e .
g .,
for separation of biochemical substances .
[
PJC ]
{
Gradient post },
a post or stake indicating by its height or by marks on it the grade of a railroad ,
highway ,
or embankment ,
etc .,
at that spot .
Gradin
del \
del \
n . (
Math .)
a differential operator which ,
operating on a function of several variables ,
gives the sum of the partial derivatives of the function with respect to the three orthogonal spatial coordinates ; --
also called the {
gradient }
or {
grad }.
It is represented by an inverted Greek capital delta ([
nabla ]),
and is thus because of its shape also called {
nabla },
meaning harp in Hebrew .
[
PJC ]
34 Moby Thesaurus words for "
gradient ":
bank ,
bevel ,
bezel ,
chute ,
easy slope ,
fleam ,
gentle slope ,
glacis ,
grade ,
hanging gardens ,
helicline ,
hillside ,
inclination ,
incline ,
inclined plane ,
launching ramp ,
lean ,
leaning ,
pitch ,
ramp ,
rise ,
rising ,
scarp ,
shelving beach ,
side ,
slant ,
slope ,
steep slope ,
stiff climb ,
talus ,
tilt ,
uprise ,
uprising ,
vertical height
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