关于退休问题可以换种思维
 | |
| ???? ??????? | SI ??? ??????? |
| ?????? | ?????? |
| ?????????? | m[1] |
| 1 m[1] ????? ?????? ???... | ??????? ???? ??... |
| SI ???? | 1,000 mm ?0.1 km |
| ?????????/???? ??????? | ≈?1.093613889 ????? 百度 全国哲学社会科学规划办公室 |
| ??????? ??????? | ≈?0.00053996 nmi |
??? (?? ????) ?????? ?? ???/??? ?? ???? ??? ?? ??????????????? ???? ??????? ??? ??? ?????? ??????? ??? ??, ?????? ?? ???? ?? SI ??? ???? ??? ???? ?????? ??????????? ???? ?? ????????? ?? ??????? ???????? ???? ???? ??? ???????? ??? ??, ??? ?? ?????????? ??????? ?????? ?? ???????? ???? ??? ?? ??????? ??:
| “ | ?????-????? ??? ?? ??? ?? ??????? ?? ??? ?? ????, ?? ?? ?????? ?? ?????? ???? ?? ?????? ????? ?? ?? ????? ?? ???? ????? ???? ?? 1?10?000?000 ??? ??? | ? |
. ??????? ??? ??? ??? ????? ?? ??????????????? ?????? ?????? ???????? ??:
| “ | ?????? ?????? ??? ??????? ??? ?? ??????? ?? 1?299?792?458??? ??? ??? ?? ?? ??? ????. | ? |
??? ???? ????? ?? ?? m (???? ????? ??? M ????? ????). ??? ?? ????? ???? ?? ??-????, ???? ???????? (1000 ???) ?? ?????? (1?100 ???), ?? SI ?????? ???? ?? ???? ???? ???
??? ?? SI ???????? ???
[??????? ????]?????? SI ?????? ?? ?????? ??? ?? ????? ?????? ?? ??-?????? ???? ???? ??? ??? ????? ????? ??? ?????? ??? ??:
| ?????? | ???? | |||||
|---|---|---|---|---|---|---|
| ??? | ????? | ??? | ??? | ????? | ??? | |
| 10–1 m | dm | ?????? | 101 m | dam | ????? | |
| 10–2 m | cm | ?????? | 102 m | hm | ????? | |
| 10–3 m | mm | ????????? | 103 m | km | ???????? | |
| 10–6 m | μm | ?????????? | 106 m | Mm | ????????? | |
| 10–9 m | nm | ????????? | 109 m | Gm | ??????? | |
| 10–12 m | pm | ???????? | 1012 m | Tm | ?????? | |
| 10–15 m | fm | ???????? | 1015 m | Pm | ?????? | |
| 10–18 m | am | ???????? | 1018 m | Em | ??????? | |
| 10–21 m | zm | ?????????? | 1021 m | Zm | ????????? | |
| 10–24 m | ym | ????????? | 1024 m | Ym | ???????? | |
| ??????? ?????? ???? ??????? ???????????? ??? ?????? ??? ?[2] | ||||||
???? ??????? ??? ????????? ???
[??????? ????]| ?????? ???? ???-SI ???? ??? ?????? |
Non-SI unit ?????? ???? ??? ?????? | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 ??? | ≡ | 10?4 | mil | 1 ??????? mil | ≡ | 104 | ??? | ||
| 1 ??? | ≡ | 39.3701 | ??? | 1 ??? | ≡ | 0.0254 | ??? | ||
| 1 ?????? | ≡ | 0.393701 | ??? | 1 ??? | ≡ | 2.54 | ?????? | ||
| 1 ????????? | ≡ | 0.0393701 | ??? | 1 ??? | ≡ | 25.4 | ????????? | ||
| 1 ??? | ≡ | 1×1010 | ??????????? | 1 ??????????? | ≡ | 1×10-10 | ??? | ||
| 1 ????????? | ≡ | 10 | ??????????? | 1 ??????????? | ≡ | 100 | ???????? | ||
?? ????? ???, ??? ?????? ??????????????? ??? ??
?????
[??????? ????]- ??????? ???????
- ??????????????? ???? ???????
- ???????? ???? ??????
- SI ??????
- ??????? ?? ????? ???? ??????? ?? ????? ????
- ?????? ?? ???? (??????)
- ?????? ?? ???
- ??? ??????
- ISO 1 – ?????? ???? ????, ???? ??????? ??????
???????
[??????? ????]- Bureau International des Poids et Mesures. The BIPM and the evolution of the definition of the metre. Retrieved 2006 June 3.
- ———. Resolutions of the CGPM. Retrieved 2006 June 3.
- Penzes, William B. at the U.S. National Institute of Standards and Technology Precision Engineering Division (2005 December 29). Time Line for the Definition of the Meter. Retrieved 2006 June 3.
- U.S. National Institute of Standards and Technology (October 2000). The NIST Reference on Constants, Units, and Uncertainty: International System of Units (SI):
- SI base units. Retrieved 2006 June 3.
- Definitions of the SI base units. Retrieved 2006 June 3.
- Historical context of the SI: meter. Retrieved 2006 June 3.
- Peter Mohr CODATA presentation October 2006
- CODATA recommendations 2006
???????
[??????? ????]- ↑ "SI base units". ????? ??????????? ??? ???????????? ??? ??????????. ?????? ????: 23 ?? 2020.
- ↑ Based upon cutoff point of one million combined Google hits on the plural form of both the international and U.S. spellings. The bolded values returned an aggregate of between 3.66 and 51.4 million hits. Whereas the micrometer is also a device for measuring small distances, a search in September 2007 yielded over four million hits on the two variations of the micrometre. In comparison, the most common prefixed form of the metre that didn’t reach the cutoff threshold—the decimetre—yielded a total of only 322,000 hits even though it is often employed to explain the volume of a litre.
????? ???????
[??????? ????]- National Research Council of Canada: Optical frequency - maintaining the metre
- Length—Evolution from Measurement Standard to a Fundamental Constant at U.S. NIST
- The History of the Meter By Tibo Qorl (Translated by Sibille Rouzaud)
- NIST:Definition of the meter and c
