美国国家标准与技术研究院

网络Nist;National Institute of Standards and Technology;National Institute of Standards and Technology NIST

美国国家标准与技术研究院

1

分别使用ISO5436标准中推荐的ISO算法以及美国国家标准与技术研究院（NIST）推荐的Two-sided算法，计算台阶高度。

Then , the step height is calculated with some algorithms : the ISO algorithm adopted by ISO 5436 and the two-sided algorithm used at NIST ( the National Institute of Standards and Technology ) .
2

美国国家标准与技术研究院物理实验室的詹姆斯周钦文教授和同事一起，用最新一代的原子钟在较为接近地面的位置测量时间的流逝。

But ABC Science reported on September 22 that Dr James Chin-Wen Chou and colleagues from the National Institute of Standards and Technology ( NIST ) in the US , have used the latest generation of atomic clocks to measure changes in time at a more down-to-Earth scale .