Problems in implementing some of the new measurement unit definitions of the SI

2013 Joint IMEKO (International Measurement Confederation) TC1-TC7-TC13 Symposium: Measurement Across Physical and Behavioural Sciences

Pavese, Franco

关键词: Algebraic expression;    Fundamental constants;    Integer numbers;    Least squares adjustments;    Multi dimensional;    Multidimensionality;    Numerical values;    Task groups;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/459/1/012042/pdf
DOI  :  10.1088/1742-6596/459/1/012042

来源: IOP

【 摘 要 】

The paper illustrates and discusses some problems that should be taken into account, should the proposed use of fundamental constants in the definition of measurement units of the SI be implemented: (a) more base units being multi-dimensional, instead of fixing the present problems in this respect; (b) the multidimensionality in the definitions; (c) the use of CODATA adjusted values of the constants for this specific purpose; (d) formal issues in stipulating algebraic expressions of the definitions, and in respect to the rounding or truncation of the numerical values in their transformation from uncertain to exact values; (e) formal issues with the use of the integer number NA; (f) limitations that can arise from the stipulation of the values of several constants for the CODATA Task Group to continue performing in future meaningful least squares adjustments of the fundamental constants taking into account future data.