full width at half maximum

简明释义

半高全宽

英英释义

例句

1.The full width at half maximum of the laser beam determines how focused the light can be in applications like cutting or engraving.

激光束的半最大宽度决定了在切割或雕刻等应用中光线的聚焦程度。

2.The full width at half maximum is crucial for understanding the line broadening effects in quantum mechanics.

在量子力学中，半最大宽度对于理解线展宽效应至关重要。

3.When analyzing chromatograms, scientists look for the full width at half maximum to assess the efficiency of separation.

在分析色谱图时，科学家查找半最大宽度以评估分离的效率。

4.In spectroscopy, the resolution of a peak is often described by its full width at half maximum, which indicates the peak's width at half its maximum intensity.

在光谱学中，峰的分辨率通常用其半最大宽度来描述，这表示峰在其最大强度一半时的宽度。

5.In medical imaging, the full width at half maximum helps to quantify the resolution of the imaging system.

在医学成像中，半最大宽度帮助量化成像系统的分辨率。

作文

In the realm of physics and engineering, the concept of full width at half maximum (FWHM) plays a crucial role in characterizing the properties of various signals and phenomena. This term refers to the width of a function measured between those points on the curve where the function reaches half of its maximum value. Understanding full width at half maximum is essential in fields such as optics, spectroscopy, and signal processing, where precise measurements are vital for accurate analysis.To illustrate the significance of full width at half maximum, let us consider its application in spectroscopy. When scientists analyze the light emitted or absorbed by substances, they often observe peaks in the spectrum. These peaks correspond to specific wavelengths of light that provide information about the material's composition. The sharpness and width of these peaks can reveal important details about the substance being studied. A narrower peak indicates a more defined energy level transition, while a broader peak suggests a range of transitions or interactions occurring simultaneously.The full width at half maximum quantifies this width, enabling researchers to compare different materials or conditions effectively. For instance, if two samples exhibit spectral peaks with different FWHM values, scientists can infer differences in their molecular structure or environmental influences. This measurement is not only valuable in academic research but also has practical implications in industries such as pharmaceuticals, where understanding the properties of compounds is critical for drug development.Moreover, the concept of full width at half maximum extends beyond spectroscopy into the realm of imaging systems. In optical systems, the resolution of an image is often limited by the point spread function (PSF), which describes how a point source of light is distributed in an image. The FWHM of the PSF provides a measure of the system's resolution: a smaller FWHM indicates better resolution and sharper images. Engineers and designers of imaging systems, such as microscopes or telescopes, rely on this parameter to optimize performance and ensure that the devices meet the required specifications.In addition to its applications in optics and spectroscopy, full width at half maximum is also prevalent in the field of signal processing. When analyzing signals, especially in communications, understanding the bandwidth is crucial. The FWHM of a signal can help determine the effective bandwidth, which influences data transmission rates and overall system performance. By optimizing the FWHM, engineers can enhance the efficiency of communication systems, ensuring that signals are transmitted clearly and without distortion.In conclusion, the concept of full width at half maximum is a fundamental parameter across various scientific and engineering disciplines. Its ability to quantify the width of peaks in a spectrum or the resolution of an imaging system makes it an invaluable tool for researchers and practitioners alike. Whether in the laboratory analyzing chemical compounds or designing advanced imaging technologies, understanding and applying the principles of full width at half maximum can lead to significant advancements and innovations. As technology continues to evolve, the importance of precise measurements and characterizations will only grow, further underscoring the relevance of this concept in modern science and engineering.

在物理和工程领域，全宽半最大值（FWHM）的概念在表征各种信号和现象的特性方面起着至关重要的作用。这个术语指的是在曲线达到最大值的一半时，测量函数的宽度。在光学、光谱学和信号处理等领域，理解全宽半最大值是至关重要的，因为精确的测量对于准确的分析至关重要。为了说明全宽半最大值的重要性，让我们考虑它在光谱学中的应用。当科学家分析物质发射或吸收的光时，他们通常会观察到光谱中的峰。这些峰对应于特定波长的光，提供有关材料成分的信息。这些峰的尖锐度和宽度可以揭示关于所研究物质的重要细节。较窄的峰表示更明确的能级跃迁，而较宽的峰则表明同时发生了一系列跃迁或相互作用。全宽半最大值量化了这种宽度，使研究人员能够有效地比较不同的材料或条件。例如，如果两个样品显示出不同的光谱峰FWHM值，科学家可以推断出它们在分子结构或环境影响方面的差异。这个测量不仅在学术研究中具有价值，而且在制药等行业中也有实际意义，在这些行业中，了解化合物的性质对药物开发至关重要。此外，全宽半最大值的概念超越了光谱学，延伸到成像系统的领域。在光学系统中，图像的分辨率通常受到点扩散函数（PSF）的限制，PSF描述了光源在图像中的分布。PSF的FWHM提供了系统分辨率的衡量标准：较小的FWHM表示更好的分辨率和更清晰的图像。显微镜或望远镜等成像系统的工程师和设计师依赖这一参数来优化性能，并确保设备符合所需的规格。除了在光学和光谱学中的应用外，全宽半最大值在信号处理领域也很常见。在分析信号时，特别是在通信中，理解带宽至关重要。信号的FWHM可以帮助确定有效带宽，这影响数据传输速率和整体系统性能。通过优化FWHM，工程师可以提高通信系统的效率，确保信号清晰且无失真地传输。总之，全宽半最大值的概念是各种科学和工程学科中的基本参数。它能够量化光谱中峰的宽度或成像系统的分辨率，使其成为研究人员和从业者的宝贵工具。无论是在实验室分析化合物，还是设计先进的成像技术，理解和应用全宽半最大值的原理都可以带来显著的进步和创新。随着技术的不断发展，精确测量和表征的重要性只会增加，进一步强调了这一概念在现代科学和工程中的相关性。