Acta Metrologica Sinica  2020, Vol. 41 Issue (2): 129-133    DOI: 10.3969/j.issn.1000-1158.2020.02.01
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The Quantized Redefinition of the SI and its Signification
MA Ai-wen1,2,QU Xing-hua1
1. College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China
2. Chinese Society for Measurement, Beijing 100029, China
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Abstract  The revision of the International System of Units (SI) was approved by the 26th General Conference on Weights and Measures(CGPM 2018). The definitions of the kilogram, the ampere, the kelvin and the mole are based on the new physical concepts, the definitions of the meter, the second and the candela are reformulated. Using the rules of nature to create the rules of measurement, since then, the definitions of all the SI basic units have been derived from a set of seven defining constants and have been quantized. The new SI is more stable and universal, it provides opportunities and challenges in the fields of metrology for National Metrology Institutes around the world.
Key wordsmetrology      SI      base unit      defining constant      quantization definition     
Received: 15 July 2019      Published: 17 February 2020
PACS:  TB91  
Corresponding Authors: MA Aiwen     E-mail: maaiwen@sina.com
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Cite this article:   
MA Ai-wen,QU Xing-hua. The Quantized Redefinition of the SI and its Signification[J]. Acta Metrologica Sinica, 2020, 41(2): 129-133.
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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2020.02.01     OR     http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2020/V41/I2/129
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