Dark out the upper corners, using Gradient Tool. 使用简便工具将布上面的地面加暗。
gradient
[ noun ]
a graded change in the magnitude of some physical quantity or dimension
<noun.linkdef>
the property possessed by a line or surface that departs from the horizontal
<noun.attribute> a five-degree gradient
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.
2. Rising or descending by regular degrees of inclination; as, the gradient line of a railroad.
3. Adapted for walking, as the feet of certain birds.
Gradient \Gra"di*ent\, n. 1. The rate of regular or graded ascent or descent in a road; grade.
2. A part of a road which slopes upward or downward; a portion of a way not level; a grade.
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.
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]
The second approach uses a more advanced gradient coil, which is the basis of Advanced NMR System's recently introduced technology.
About halfway down the face, however, the gradient eases and you can let yourself go in what you hope will be perfect powder.
In the Vatican Bernini was dealing with light as well as the gradient - and he was reminding us, in the concentration of his columns, of the majesty of his exterior colonnade in Saint Peter's Square.
That expansion, Rosenberg says, "has occurred over a climatic gradient greater in many ways" than the greenhouse changes predicted in some studies.
In a third, so-called "brute force" approach, the gradient coil itself remains the same but is "driven" by a more powerful battery of amplifiers than in existing MRI machines.