查询词典 photon

Whether the rest mass of the photon is zero or not hence became one of the fundamental problems confronted by many physicists.

恒定光速暗含了传播电磁波的媒介——光子的静止质量必须为零的假设，而光子静止质量是否为零也就成为物理学家们一直希望能够正面回答的基本问题之一。

One of the major contributions of Maxwellian theory was that it set up an essential relation between the electromagnetic field and light in vacuum, and defined the speed of electromagnetic wave as the constant speed of light c , which implies a hypothesis that the rest mass of the photon should be zero exactly.

麦克斯韦电磁理论的一个重要贡献在于它将真空中的电磁场与光联系起来，并将电磁场的传播速度定义为真空的属性，即恒定的光速 c ，因而建立了电磁波与光之间的本质联系。

They also restock photon torpedoes and repair damage.

他们还进货光子鱼雷和修复损伤。

A right circular cone .Shaped like a cone .Closely related to PET is single- photon emission computed tomography, or SPECT.

与正电子发射x射线摄影技术密切相关的是单光子发射计算机化成像。

This dissertation is dedicated to investigate the pyrolysis of the fuel-bonded nitrogen model compounds,including five-membered ring nitrogen model compound pyrrole and the substituted six-membered ring nitrogen compound 4-methyl pyridine,with vacuum ultraviolet single-photon ionization combined with molecular beam mass spectrometry technique.

本论文利用同步辐射真空紫外单光子电离、分子束取样和反射式飞行时间质谱相结合的技术研究了含氮杂环模型化合物的热解，包括五元环含氮体系、六元环含氮体系和替代的六元环含氮体系(4-甲基吡啶)。

So in this paper, the improved models were proposed which regarded the leaf photosynthetic trait and the light penetrating into row cucumber crop canopy heterogeneously, it is composed by the model of photon transport in heterogeneous leaf canopy and the empiristic formula which described regression between leaf age and maximal photosynthesis rate and use efficiency of sunlight.

该文所建立的日光温室黄瓜非均质冠层光合速率模型考虑到日光温室黄瓜冠层内光照分布以及叶片光合特性的不均匀性，其包含了非均匀冠层的透光模型和描述冠层叶片光合特性差异的经验公式。

It start with several plain and rusticity problem, have described the problem about essential of Doppler offect of sound wave, relative velocity between photon, third observer.

先从几个比较浅显、质朴的问题入手，对声多普勒本质、光子间的相对速度问题、第三者问题作了较详尽的探讨和证明。

To conduct such research a new experimental apparatus was established.With this setup the two-photon excitation spectra of Barium and one-photonexcitation spectra of Strontium Rydberg atoms were recorded and identified.The Stark spectra of Strontium atoms showed the "l-mixing" and "n-mixing"features. By changing laser wavelength and external electric field strengthsimultaneously, the scaled-energy spectra of Strontium 〓 Rydberg atomsat constant scaled-energy ε=-3.00,-2.50 and -1.88 were recorded for thefirst time. The experimental spectra were Fourier transformed and yielded therecurrence spectra.

主要工作包括：建立了一套用于外电场原子光谱研究的原子束实验装置；获得了Ba原子的双光子、Sr原子的单光子零场激发谱，并对各谱线进行了标识；进行了Sr原子电场Stark效应研究，观察到了低场时能级角量子数"l"混合区及高场时主量子数"n"混合区的存在；首次获得了Sr原子在标度能量ε=-3.00、-2.50及-1.88时〓高Rydberg态电场标度能谱及傅立叶变换后的电子回归谱。

There is a choice of several rendering algorithms, from simple scanline to up-to-date global illumination rendering using raytracing and photon mapping.

是有选择的几个渲染算法，从简单的扫描线，以切合时宜的全局光照渲染使用raytracing和光子映射。

Both small angle X-ray scattering and photon correlation spectroscopy were used to characterize the particle size distribution of nano-scale tungsten powders.

采用X射线小角散射法和光子相关谱法测试了纳米钨粉的粒度分布。

The Master of Science degree program in Economics features a curriculum that is flexibl...

在经济学理学硕士学位的课程计划的特点是灵活而全面的方法，在理论和应用课程培训工作。

This module is used for constructing and visualizing 3D models.

该模块是用于建设和可视化的三维模型。