基本物理常数(Fundamental Physical Constants), 中性原子的基本水平和电离能量(Ground Levels and Ionization Energies for the Neutral Atoms), 数学软件指南(Guide to Available Mathematical Software), NIST计量结果不确定性的评估与表达指南(Guidelines for Evaluating and Expressing the Uncertainty of NIST Measurement...
Provided by the National Institute of Standards and Technology, the Fundamental Physical Constants Website is an extensive resource for physics researchers, educators, and students. The Website offers values for physics constants, conversion factors a searchable bibliography of physics constants, and back...
9 RegisterLog in Sign up with one click: Facebook Twitter Google Share on Facebook NIST Also found in:Dictionary,Thesaurus,Financial,Acronyms,Encyclopedia,Wikipedia. National Institute of Standards and Technology. Medical Dictionary, © 2009 Farlex and Partners ...
Fundamental Physical Constants - Searchable Bibliography on the Constants (Web, free access)Ground ...
基本物理常数(Fundamental Physical Constants),中性原子的基本水平和电离能量(Ground Levels and Ionization Energies for the Neutral Atoms),数学软件指南(Guide to Available Mathematical Software),NIST计量结果不确定性的评估与表达指南(Guidelines for Evaluating and Expressing the Uncertainty of NIST Measurement ...
美国国家标准与技术研究院 NIST 一、NIST概况美国国家标准与技术研究院 以下简称NIST 直属美国商务部,从事物理、生物和工程方面的基础和应用研究,以及测量技术和测试方法方面的研究,提供标准、标准参考数据及有关服务,在国际上享有很高的声誉。NIST的主要任务是: 1 建立国家计量基准与标准; 2 发展为工业和国防服务的测...
Buried on page 25 of the 2019 budget proposal for the National Institute of Standards and Technology (NIST), under the heading “Fundamental Measurement, Quantum Science, and Measurement Dissemination”, there’s a short entry that has caused plenty of debate and even a fair deal of anger among...
NIST Online Databases(NIST在线数据库)http://srdata.nist.gov/ NIST Online Databases All of the following online databases are free.AnthroKids - Anthropometric Data of Children (Web, free access)Atlas of the Spectrum of a Platinum/Neon Hollow-Cathode Lamp in the Region 1130-4330Å (Web, free...
This extraordinary stability makes the ytterbium lattice clock a more powerful tool for precision tests such as whether the "fundamental constants" of nature are really constant, and searches for the elusive dark matter purported to make up much of the universe. The experiment demonstrating the doubl...
Additional improvements in trap design and other features are planned to further improve performance. Already, NIST's three experimental clocks can be compared to improve measurements of possible changes in some of the fundamental "constants" of nature, a line of inquiry that has important implication...