The Characteristics of the New SI Base on “second system” and its Future Development
SONG Ming-shun1,FANG Xing-hua1,MA Ai-wen2,3,WU Zeng-yuan1
1. College of Economics & Management, China Jiliang University, Hangzhou, Zhejiang 310018, China
2. State Key Laboratory of Precision Measurement Technology and Instrument, Tianjin University,Tianjin 300072, China
3. Chinese Society for Measurement, Beijing 100029, China
Abstract:The new International System of Units will be introduced on May 20, 2019. The main change is that the seven basic units are derived from one or more defined basic constants, so a perfect standard definition for the basic unit is established. Specifically, the new definitions of kilogram, ampere, kelvin, and mole in current revision of SI are discussed, as well as their characteristics. Then by reviewing the development of SI, a concept of "second system" is proposed to describe the essences of the revised SI. On the basis of the limitations and the problems which may be faced, an advanced SI structure, which is more open and extensive coverage in multidisciplinary quantities, is put forward, furthermore, the corresponding framework of the future SI system is depicted.
宋明顺,方兴华,马爱文,吴增源. 论新国际单位制(SI)的“秒制”特征及其未来发展[J]. 计量学报, 2019, 40(4): 541-548.
SONG Ming-shun, FANG Xing-hua,MA Ai-wen,WU Zeng-yuan. The Characteristics of the New SI Base on “second system” and its Future Development. Acta Metrologica Sinica, 2019, 40(4): 541-548.
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