time and frequency standards

简明释义

时间和频率基准

英英释义

例句

1.Telecommunication companies must adhere to strict time and frequency standards to ensure uninterrupted service.

电信公司必须遵守严格的时间和频率标准以确保服务不中断。

2.In broadcasting, time and frequency standards help synchronize audio and video signals.

在广播中，时间和频率标准有助于同步音频和视频信号。

3.The National Institute of Standards and Technology develops time and frequency standards for the United States.

国家标准与技术研究院为美国制定时间和频率标准。

4.Atomic clocks are used to maintain international time and frequency standards for scientific research.

原子钟用于维护国际时间和频率标准以便进行科学研究。

5.The global positioning system relies on accurate time and frequency standards to provide precise location data.

全球定位系统依赖于准确的时间和频率标准来提供精确的位置数据。

作文

In today's fast-paced world, the significance of accurate measurement of time cannot be overstated. Whether in telecommunications, navigation, or scientific research, having precise time and frequency standards is crucial. These standards serve as a reference point for various technologies that rely on synchronization and timing. For instance, global positioning systems (GPS) depend on the accurate timing provided by atomic clocks, which are based on the time and frequency standards set by organizations like the International Bureau of Weights and Measures (BIPM). The concept of time and frequency standards involves defining the units of time and frequency in a way that can be universally accepted and replicated. The second, the basic unit of time, is defined based on the vibrations of cesium atoms, specifically 9,192,631,770 cycles of radiation corresponding to the transition between two hyperfine levels of the ground state of the cesium-133 atom. This definition ensures that time measurement is consistent and reliable across different regions and applications.Moreover, time and frequency standards are not only essential for scientific purposes but also have a profound impact on everyday life. For example, the synchronization of clocks in banking transactions, stock trading, and even in our smartphones relies on these standards. A discrepancy of just a few milliseconds can lead to significant financial losses or errors in data transmission. Therefore, maintaining and adhering to these standards is critical for ensuring that technology functions seamlessly.Another important aspect of time and frequency standards is their role in international cooperation. Countries around the world collaborate to maintain a universal time standard, known as Coordinated Universal Time (UTC). UTC is derived from International Atomic Time (TAI) and is adjusted with leap seconds to account for irregularities in the Earth's rotation. This collaboration helps in minimizing discrepancies in timekeeping, which is vital for global operations such as air travel, satellite communications, and international broadcasting.In addition to technological and economic implications, time and frequency standards also play a role in scientific advancements. Researchers rely on precise measurements to conduct experiments and validate theories. For instance, in physics, experiments related to relativity and quantum mechanics require accurate timing to observe phenomena that occur within fractions of a second. Innovations in timekeeping technology, such as optical lattice clocks, are pushing the boundaries of what we know about time and frequency, leading to new discoveries and applications.In conclusion, time and frequency standards are fundamental to modern society, influencing everything from daily routines to cutting-edge scientific research. Their importance cannot be underestimated, as they provide the framework for synchronization and accuracy in various fields. As technology continues to evolve, the need for reliable time and frequency standards will only grow, highlighting the necessity of ongoing research and international cooperation to uphold these critical benchmarks.

在当今快节奏的世界中，准确测量时间的重要性不容小觑。无论是在电信、导航还是科学研究中，拥有精确的时间和频率标准至关重要。这些标准作为各种依赖同步和计时的技术的参考点。例如，全球定位系统（GPS）依赖于原子钟提供的准确计时，而这些原子钟是基于国际计量局（BIPM）设定的时间和频率标准。时间和频率标准的概念涉及以一种可以被普遍接受和复制的方式定义时间和频率的单位。秒，基本的时间单位，是基于铯原子的振动定义的，具体为与铯-133原子基态的两个超精细能级之间的跃迁对应的9,192,631,770个辐射周期。这一定义确保了不同地区和应用中的时间测量一致且可靠。此外，时间和频率标准不仅对科学目的至关重要，而且对日常生活也产生深远影响。例如，银行交易、股票交易甚至我们的智能手机中的时钟同步都依赖于这些标准。仅几毫秒的差异就可能导致重大财务损失或数据传输错误。因此，维护和遵循这些标准对于确保技术的无缝运行至关重要。时间和频率标准的另一个重要方面是它们在国际合作中的作用。世界各国合作维护一个统一的时间标准，即协调世界时（UTC）。UTC源自国际原子时（TAI），并通过闰秒进行调整，以考虑地球自转的不规则性。这种合作有助于最小化计时中的差异，这对于航空旅行、卫星通信和国际广播等全球操作至关重要。除了技术和经济影响外，时间和频率标准在科学进步中也发挥着作用。研究人员依赖精确的测量来进行实验和验证理论。例如，在物理学中，与相对论和量子力学相关的实验需要准确的计时，以观察发生在几分之一秒内的现象。时间测量技术的创新，例如光学晶格钟，正在推动我们对时间和频率的认识的边界，导致新的发现和应用。总之，时间和频率标准是现代社会的基础，影响着从日常生活到尖端科学研究的方方面面。它们的重要性不容低估，因为它们为各种领域的同步和准确性提供了框架。随着技术的不断发展，对可靠的时间和频率标准的需求只会增加，这突显了持续研究和国际合作以维护这些关键基准的必要性。