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一、物理量的特点物理现象(物体、过程、状态)的定性并定量地描述有赖于物理量,它无论是标量、矢量或张量均具有可测性。物理量常简称为量。量的任一特定值,都可以表达为数值与单位之积。其特点可以归纳为:1.存在于一定的量制之中根据量制中基本量与导出量的定义以及量制的定义。可以得出结论:在给定的量制范围内包含了该范围(领域)的全部量。如果,还有未能自其基本量导出的量,则说明基本量的数量不够而应予补充。2.可以用基本量定义或自基本量导出量
First, the characteristics of the physical quantity The qualitative and quantitative description of physical phenomena (objects, processes, states) depends on the physical quantity, whether it is scalar, vector or tensor have testability. Physical quantities are often simply referred to as quantities. Any specific value of a quantity can be expressed as a product of a numerical value and a unit. Its characteristics can be summarized as follows: 1. It exists in a certain quantity system and is based on the definition of the basic quantity and the derived quantity in the quantity system and the definition of the quantity system. It can be concluded that the entire quantity of this range (field) is included within a given system range. If there is an amount that cannot be derived from its basic quantity, then the quantity of the basic quantity is insufficient and should be supplemented. 2 can be used to define the basic amount or derived from the basic amount