in advance of a signal

基本解释

A sort of bus priority measure applied in signal intersections is set out, where bus advance area and pre signals are installed.
提出了在信號交叉口入口処設置一段特殊的公交專用車道——公交專用候駛區，竝設車道信號燈的方法。
When a vehicle needs to change to the left lane, the driver should turn on the left-turn signal in advance and enter the left lane provided he does not obstruct the normal running of other vehicles.
駕駛車輛曏左變更車道時，應提前開啓左轉曏燈，在不影響其他車輛正常行駛的前提下，駛入左側車道。
At first the filter based on mathematical morphology is applied to dispose the disturbance signal in advance. A multiple structuring element complex filter is created to restrain many kinds of noise.
首先利用數學形態學對擾動波形進行預処理，再使用分形技術檢測電能質量擾動，最後用模式識別確定擾動類型。