“amplitude”的概念、定义、翻译、参考文献-科学参考

amplitude

Physics

See wave.

Mathematics

Suppose that x = A sin(ω‎t + α‎), where A ( > 0), ω‎ and α‎ are constants. This may, for example, give the displacement x of a particle, moving in a straight line, at time t. The particle is thus oscillating about the origin O. The constant A is the amplitude and gives the maximum distance in each direction from O that the particle attains. (ω‎ is the angular frequency and α‎ is the phase.)

The term may also be used in the case of damped oscillations to mean the corresponding coefficient, even though it is not constant. For example, if x = 5e^−2t sin3t the oscillations are said to have amplitude 5e^−2t, which tends to zero as t tends to infinity.

Astronomy

1. The overall range of brightness of a variable star: the difference between its maximum and minimum magnitudes.

2. In physics, the maximum difference of a cyclical quantity from its mean value, i.e. half the peak-to-peak value.

Chemical Engineering

The maximum value of varying quantity from its mean or base value. For example, in simple harmonic motion the amplitude of a wave is half the maximum peak-to-peak value.

Computer

See signal.

Electronics and Electrical Engineering

1. Strictly, the peak value of an alternating current or wave in the positive or negative direction. The difference between extreme values in a complete cycle is the peak-to-peak amplitude.
2. The value of an alternating current or wave in the positive or negative direction at a particular moment.
3. See wave.

Geology and Earth Sciences

1. Of a fold, the height of the maximum displacement of a folded layer measured from a median trace which passes through the inflexion points of adjacent limbs.
2. Of a wave, the distance between the highest point of the wave and the position of zero displacement.

单词	amplitude
释义	amplitude Physics See wave. Mathematics Suppose that x = A sin(ω‎t + α‎), where A ( > 0), ω‎ and α‎ are constants. This may, for example, give the displacement x of a particle, moving in a straight line, at time t. The particle is thus oscillating about the origin O. The constant A is the amplitude and gives the maximum distance in each direction from O that the particle attains. (ω‎ is the angular frequency and α‎ is the phase.) The term may also be used in the case of damped oscillations to mean the corresponding coefficient, even though it is not constant. For example, if x = 5e^−2t sin3t the oscillations are said to have amplitude 5e^−2t, which tends to zero as t tends to infinity. Astronomy 1. The overall range of brightness of a variable star: the difference between its maximum and minimum magnitudes. 2. In physics, the maximum difference of a cyclical quantity from its mean value, i.e. half the peak-to-peak value. Chemical Engineering The maximum value of varying quantity from its mean or base value. For example, in simple harmonic motion the amplitude of a wave is half the maximum peak-to-peak value. Computer See signal. Electronics and Electrical Engineering 1. Strictly, the peak value of an alternating current or wave in the positive or negative direction. The difference between extreme values in a complete cycle is the peak-to-peak amplitude. 2. The value of an alternating current or wave in the positive or negative direction at a particular moment. 3. See wave. Geology and Earth Sciences 1. Of a fold, the height of the maximum displacement of a folded layer measured from a median trace which passes through the inflexion points of adjacent limbs. 2. Of a wave, the distance between the highest point of the wave and the position of zero displacement.
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