把一个时间或空间函数分解为具有一定振幅和相位的正弦函数(正弦和余弦)之和(或积分)的过程。
The process of decomposing a function of time or space into a sum (or integral) of sinusoidal functions (sines or cosines) with specific amplitudes and phases.
在磁场保持不变的情况下，纠缠度的时间演化呈现周期性变化的正弦函数形式。
If the magnetic field is fixed, the time evolution of the entanglement is periodic and is a sinusoidal function.
提出了“利用反双曲正弦函数变换提高数据列光滑程度”的新结论，获得了递增时间序列改善的自回归预测新方法。
A new conclusion is put forward, in which the smooth degree of the data row can be enhanced by means of the arc-hyperbolic sine function transformation.
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