标题： 定义单位系统的更清晰方法 显示英文标题

标题： A clearer approach for defining unit systems

摘要： 我们介绍了SI单位制和其他单位系统，包括cgs-em和cgs-es，在一个框架中，该框架中一组完全独立且维度正交的基本单位被设计用于简化每个系统中使用的方程的惯例所修改。 我们建议弧度可以被视为一个独立的单位，其维度状态在SI和其他单位系统中为此目的进行了修改。 此框架阐明了不同单位系统之间的相互关系，并确定了定义单位系统及其使用方程所需的关键信息。 具体而言，这些是未简化的系统中基本单位的大小，以及足够的方程以确定特定单位系统采用的所有惯例。 提出了修订后的SI所需的额外信息。 我们并不建议改变SI中角度作为无量纲量的处理方式。 还建议高斯单位系统最好被视为与cgs-es相同，但方程中的B和H符号用于表示B和H的相对论版本，这些应被正确视为不同的量。 这些不同版本的B和H同样可以在SI中使用，具有海维赛德-洛伦茨系统的许多优点。 显示英文摘要

摘要： We present the SI and other unit systems, including cgs-em and cgs-es, in a framework whereby a system of fully independent and dimensionally orthogonal base units is modified by conventions designed to simplify the equations that are used within each system. We propose that the radian can be seen as an independent unit whose dimensional status is modified in the SI and other unit systems for this purpose. This framework clarifies how different unit systems are interrelated, and identifies the key pieces of information that are needed to define both a unit system and the equations that are to be used with it. Specifically, these are the size of the base units in the unsimplified system, together with sufficient equations to identify all the conventions adopted by the particular unit system. The appropriate extra information for the revised SI is presented. We do not propose that the treatment of angles as dimensionless within the SI is changed. It is also proposed that the Gaussian unit system is best seen as identical to cgs-es, but with the B and H symbols in equations used to represent relativistic versions of B and H, which should properly be treated as different quantities. These different versions of B and H can similarly be used within the SI, with many of the advantages of the Heaviside-Lorentz system.