V2EX out-of-phase

Out-of-phase

Definition / 释义

out-of-phase(形容词,亦作副词用)指两个振动、信号或周期性变化不同步,相位不一致;常见于物理、电子、声学中,表示两者的波峰与波峰(或同一特征点)没有对齐。在日常语境中也可引申为“不合拍、节奏对不上”。

Pronunciation / 发音

/at v fez/

Examples / 例句

The two speakers were out-of-phase, so the sound seemed weaker.
两个扬声器不同相,所以声音听起来更弱。

Because the current and voltage were out-of-phase, the circuit wasted energy as reactive power.
由于电流与电压不同相,这个电路会以无功功率的形式浪费能量。

Etymology / 词源

phase源自希腊语 phasis(“显现、出现”),经拉丁语与法语进入英语,后来在科学语境里发展出“(波的)相位、阶段”的含义。out of 表示“脱离、不在……之内”,因此 out-of-phase 字面义就是“不在同一相位”,引申为“不同步/不合拍”。

Related Words / 相关词

Literary Works / 文学作品

  • The Feynman Lectures on Physics(《费曼物理学讲义》)在波动、干涉与相位关系的讨论中常出现“out of phase/ out-of-phase”的表述。
  • Optics by Eugene Hecht(《光学》)讲解光的干涉、相位差与相消/相长干涉时高频使用该术语。
  • Introduction to Electrodynamics by David J. Griffiths(《电动力学导论》)在交流电、相位差与复数表示的相关内容中会出现该表达。
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