In practice there are three methods of accomplishing this phase difference. 在實踐中有三種方法來獲得相位差。
A frequency tracking method is proposed.The synchronism sampling is achieved to improve the measuring precision of frequency and phase difference. 本文提出一種頻率跟蹤方法,可以在不過零開始採樣的情況下,實現整周期採樣,保證頻率和相位差測量的精度。
The phase difference between the two sources is gradually drifting with time. 兩個源的位相差隨時間逐漸移動。
Compare with the results obtained from the experiment, isotherm and the rule of phase interface moving obtained from the simulation are almost the same. 和實驗結果相比,通過數值模擬得出的等溫線和界面移動規律形狀都與實際情況相差不大。