arb.units 是什么意思？

arb.units 是什么意思？

据说是压力单位··

玩游戏

字面意思是任意单位。wiki上的解释，大概是描述一种相对关系。通常会有一个参照对象，然后定性地描述想要测量的对象与参照对象的相对变化趋势。因为只是描述一种比值关系，所以可以视为无量纲的，或者说可以用任意单位描述。
In science and technology, an arbitrary unit (abbreviated arb. unit,[1] see below) or procedure defined unit[2] (p.d.u.) is a relative unit of measurement to show the ratio of amount of substance, intensity, or other quantities, to a predetermined reference measurement. The reference measurement is typically defined by the local laboratories or dependent on individual measurement apparatus. It is therefore impossible to compare "1 arb. unit" by one measurer and "1000 arb. unit" by another measurer without detailed prior knowledge on how the respective "arbitrary units" were defined; thus, the unit is sometimes called an unknown unit.[2] The unit only serves as a placeholder unit to compare multiple measurements performed in similar environment.
Since the unit expresses the ratio between the measurement and the reference, it can be considered a unit for dimensionless quantities. The unit is commonly used in fields such as physiology to indicate substance concentration, and spectroscopy to express spectral intensity.

aribitrary unit的意思，随意，即自定义的单位，通常是指没有通用的自己发明使用的一种单位