V2EX phase function

Phase Function

释义 Definition

phase function相函数。常用于物理学/光学/大气科学与计算机图形学中,指描述光(或粒子)被散射后在不同方向上分布情况的函数;也可泛指系统中与“相位(phase)”相关的函数(不同学科语境略有差异)。

发音 Pronunciation (IPA)

/fez fkn/

例句 Examples

The phase function tells us how light scatters in different directions.
相函数告诉我们光会如何向不同方向散射。

In atmospheric radiative transfer, choosing an appropriate phase function can strongly affect predicted brightness and visibility.
在大气辐射传输中,选取合适的相函数会显著影响对亮度与能见度的预测。

词源 Etymology

phase 源自希腊语 phasis(“显现、出现”),经拉丁语与法语进入英语,常与“相位/阶段”相关;function 来自拉丁语 functio(“履行、执行”,引申为“功能/函数”)。合起来 phase function 字面含义可理解为“描述相位相关行为的函数”,在散射理论中则特指“角分布的散射函数”。

相关词 Related Words

文学与典籍 Literary Works

  • Radiative Transfer(Subrahmanyan Chandrasekhar)
  • Principles of Optics(Max Born & Emil Wolf)
  • Light Scattering by Small Particles(H.C. van de Hulst)
  • Optics(Eugene Hecht)
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