precession
衰退期,衰退,前进,前期
Related Words
Definitions
- 1
- : the act or fact of preceding; precedence.
- : Mechanics. the motion of the rotation axis of a rigid body, as a spinning top, when a disturbing torque is applied while the body is rotating such that the rotation axis describes a cone, with the vertical through the vertex of the body as axis of the cone, and the motion of the rotating body is perpendicular to the direction of the torque.
- : Astronomy. the slow, conical motion of the earth's axis of rotation, caused by the gravitational attraction of the sun and moon, and, to a smaller extent, of the planets, on the equatorial bulge of the earth.precession of the equinoxes.
Synonyms & Antonyms
Examples
The new study also found evidence of phase precession outside of spatial tasks, lending some weight to the idea it may be a more general process in learning throughout the brain.
The researchers say more studies are needed to flesh out the role of phase precession in the brain, and how or if it contributes to learning is still uncertain.
Notably, the rate of that precession diverged slightly from the standard model expectation, physicists report April 7 in a virtual seminar, and in a paper published in Physical Review Letters.
A radiofrequency pulse not only knocks protons down, but synchronizes their spins with each other, matching their precession frequencies into a coordinated group choreography.
After the pulse, the precession frequencies gradually become unsynchronized again as the protons return to their upright orientation, spinning off at different rates like dancers embarking on their solos.
This is due to what is known as "precession;" a slow movement of the axis upon which the earth rotates.
Does the precession of the equinoxes have any effect upon the seasons or upon the climate of different parts of the earth?
Will the precession ever bring back the right ascensions and declinations to be again what they now are?
This slow movement forward of the goal-post is called precession—the precession of the equinoxes.
Instruct the computer to discontinue precession operations that have been initiated.