“十四五”以来中国多项新建国家计量基准达国际先进水平

Core Insights - Since the "14th Five-Year Plan," China has established 34 new national measurement standards, representing an 89% increase compared to the "13th Five-Year Plan," with many reaching international advanced levels [1][2] Group 1: Measurement Standards in Key Sectors - In healthcare and food safety, the new measurement standards include devices that can accurately measure visual effects in medical imaging, aiding doctors in identifying subtle differences in MRI images [1] - The isotope dilution mass spectrometry method allows for precise analysis of chemical element content in various substances, including clinical blood serum, infant formula, and harmful elements in cosmetics [1] Group 2: Advancements in Space and Ocean Exploration - The "microwave brightness temperature standard" captures weak radiation signals with an error margin of only 0.3%, supporting satellite detection of planetary surface composition and geological activity [1] - The "mid-frequency underwater sound pressure standard" utilizes laser interferometry to calibrate underwater sensors, enabling precise location tracking of underwater vehicles and black boxes from downed aircraft [1] Group 3: Innovations in Precision Measurement - The "two-dimensional line texture standard" measures uncertainty at just 28 nanometers, addressing challenges in the precision of sub-micron and nano-level photolithography [2] - The airspeed standard can detect extremely low wind speeds, contributing to the development of the wind power industry [1] Group 4: Future Directions - The National Market Supervision Administration plans to continue enhancing measurement capabilities during the "15th Five-Year Plan," focusing on foundational measurement and precision in extreme values and dynamic quantities [2]