international prototype kilogram

简明释义

国际公斤原型

英英释义

例句

1.The international prototype kilogram 国际千克原器 was redefined in 2019 to improve precision in mass measurement.

为了提高质量测量的精度，国际千克原器 国际千克原器在2019年进行了重新定义。

2.The weight of the international prototype kilogram 国际千克原器 is used as a standard for measuring mass in laboratories worldwide.

世界各地的实验室使用国际千克原器 国际千克原器的重量作为质量测量的标准。

3.Every country relies on the international prototype kilogram 国际千克原器 for trade and commerce to ensure consistent weight standards.

每个国家都依赖于国际千克原器 国际千克原器来确保贸易和商业中的一致重量标准。

4.Scientists compare their measurements to the international prototype kilogram 国际千克原器 to ensure accuracy.

科学家们将他们的测量与国际千克原器 国际千克原器进行比较，以确保准确性。

5.The international prototype kilogram 国际千克原器 is made of platinum-iridium and is kept at the International Bureau of Weights and Measures.

国际千克原器 国际千克原器由铂铱合金制成，存放在国际计量局。

作文

The concept of the international prototype kilogram is fundamental to the field of metrology, which is the science of measurement. For many years, the international prototype kilogram served as the standard for defining the kilogram, one of the seven base units in the International System of Units (SI). This physical object, a cylinder made of a platinum-iridium alloy, was kept at the International Bureau of Weights and Measures (BIPM) in France. It represented the mass of one kilogram and was used as the reference against which all other kilograms were measured.The importance of having a reliable and consistent standard cannot be overstated. Imagine a world where the definition of a kilogram could vary from place to place. Such discrepancies could lead to confusion in trade, science, and everyday life. For instance, if a grocery store in one country sold a kilogram of apples that was actually lighter than a kilogram in another country, it would create significant issues in commerce and trust between consumers and sellers.However, in 2019, the definition of the kilogram underwent a significant change. The reliance on the international prototype kilogram was replaced by a definition based on fundamental constants of nature, specifically the Planck constant. This shift marked a new era in metrology, allowing for more precision and stability in measurements. By using the Planck constant, scientists can now define a kilogram without depending on a physical object that could change over time due to wear or contamination.This transition is not just a technical adjustment; it reflects a broader movement in the scientific community towards redefining measurements based on universal constants rather than artifacts. The international prototype kilogram, while historically significant, had its limitations. Over time, the original prototype lost a tiny amount of mass due to surface contamination and cleaning, leading to variations in the definition of a kilogram worldwide. By moving to a definition based on the Planck constant, we ensure that the kilogram remains constant and universally applicable, regardless of any physical object.The implications of this change are profound. In fields such as science, engineering, and manufacturing, precise measurements are crucial. For example, in pharmaceuticals, the exact dosage of a medication can mean the difference between efficacy and harm. With the new definition, researchers and manufacturers can be assured that their measurements are accurate and consistent across the globe.Moreover, this advancement in metrology opens up new possibilities for innovation. As technology evolves, the methods for measuring and defining units will continue to improve, leading to better products and services. The international prototype kilogram may have served its purpose for over a century, but the future of measurement lies in our ability to adapt and refine our standards based on the principles of science.In conclusion, the international prototype kilogram represents an important chapter in the history of measurement. It provided a necessary standard for many years, but as our understanding of the universe deepens, so too must our definitions of measurement. The shift to a definition based on the Planck constant is a testament to human ingenuity and the relentless pursuit of precision and accuracy in our measurements. As we move forward, we can be confident that our measurements will be more reliable, paving the way for advancements in science and technology that benefit society as a whole.

国际千克原型的概念对于计量学领域至关重要，计量学是测量的科学。多年来，国际千克原型作为定义千克的标准，这个单位是国际单位制（SI）中的七个基本单位之一。这个物理对象是一个由铂铱合金制成的圆柱体，保存在法国国际计量局（BIPM）。它代表一千克的质量，并被用作所有其他千克的测量参考。拥有可靠且一致的标准的重要性不容小觑。想象一下，如果千克的定义因地而异，会是什么样的世界。这种差异可能导致贸易、科学和日常生活中的混乱。例如，如果一个国家的杂货店出售的苹果一千克实际上比另一个国家的一千克轻，这将导致商业和消费者之间信任的重大问题。然而，在2019年，千克的定义经历了重大变化。对国际千克原型的依赖被基于自然基本常数的新定义所取代，特别是普朗克常数。这一转变标志着计量学的新纪元，使测量更加精确和稳定。通过使用普朗克常数，科学家们现在可以在不依赖于可能随时间变化的物理对象的情况下定义千克。这一转变不仅仅是技术调整；它反映了科学界更广泛的运动，旨在根据普遍常数重新定义测量，而不是基于人工制品。国际千克原型虽然在历史上具有重要意义，但也有其局限性。随着时间的推移，原始原型因表面污染和清洗而失去了一小部分质量，导致全球范围内千克的定义出现差异。通过转向基于普朗克常数的定义，我们确保千克保持不变且普遍适用，无论任何物理对象如何。这一变化的影响深远。在科学、工程和制造等领域，精确的测量至关重要。例如，在制药行业，药物的确切剂量可能意味着疗效与伤害之间的区别。通过新的定义，研究人员和制造商可以确信他们的测量在全球范围内都是准确和一致的。此外，这一计量学的进步为创新开辟了新的可能性。随着技术的发展，测量和定义单位的方法将继续改善，从而导致更好的产品和服务。国际千克原型可能在一个多世纪内发挥了作用，但测量的未来在于我们根据科学原理适应和完善我们的标准。总之，国际千克原型代表了测量历史中的一个重要篇章。它在许多年里提供了必要的标准，但随着我们对宇宙理解的加深，我们的测量定义也必须随之改变。基于普朗克常数的定义的转变证明了人类的聪明才智和对测量精度和准确性的不断追求。随着我们向前迈进，我们可以自信地认为，我们的测量将更加可靠，为科学和技术的进步铺平道路，造福整个社会。