1) FTL transformation
超光速变换
1.
FTL transformation formula is enduced, and some new results are obtained in this paper.
导出了超光速变换式,得到一些新的结论。
3) transform limited ultra short pulses
变换极限超短光脉冲
1.
The transform limited ultra short pulses of 11 ps with a 2.
５ＧＨｚ，脉宽为１１ｐｓ的变换极限超短光脉冲。
4) ultrafast convert
超快变换
1.
Based on a novel ultrafast convert hybrid pulse variable polarity main circuit topology,the ultrasonic pulse current which had a frequency of more than 20 kHz was superposed in the positive current duration to achieve the hybrid pulse variable polarity current which crossed zero with no dead time and with fast rising and falling edge.
基于一种新型超快变换复合脉冲变极性电路变换拓扑,在正极性电流持续期间,叠加超音频直流脉冲方波电流,获得了过零无死区时间且具有快速电流上升沿和下降沿变化速率的复合超音频脉冲变极性方波电流,将其应用于铝合金的变极性TIG焊接过程,试验研究复合超音频脉冲方波变极性TIG电弧电学特性及其对铝合金焊缝成形等行为的变化规律。
5) faster-than-light
超光速
1.
An exacter expression of faster-than-light;
关于超光速的一种准确表述
2.
However,no remarkable achievements have been made in the exploration of SETI,and only a little headway has been made in the faster-than-light research.
概述了自1960年以来地外文明探索的情况和超光速研究的进展,指出这两个领域之间的内在联系。
6) faster than light
超光速
1.
In this paper,the historic background of the study on faster than light(FTL)and the possibility of working within the frame work of special relativity are discussed.
讨论了超光速研究的历史背景和在狭义相对论框架内进行工作的可能性 ;指出已有的实验 (用单光子、激光脉冲和微波 )在量子隧穿过程中呈现出的超光速行为 ,是在特定物理条件下才有的。
2.
the article briefely introduces of the theory "Faster than light", the present conditions of the study on faster than light, and gives on example which is in accardomce with faster than light and the theory of special relativity.
介绍了"超光速"理论的由来;简介了"超光速"研究的现状;给出了既"超光速"又不违背狭义相对论的例证。
补充资料：Radon变换和逆Radon变换
Radon变换和逆Radon变换
X线物理学术语。CT重建图像成像的主要理论依据之一。1917年澳大利亚数学家Radon首先论证了通过物体某一平面的投影重建物体该平面两维空间分布的公式。他的公式要求获得沿该平面所有可能的直线的全部投影(无限集合)。所获得的投影集称为Radon变换。由Radon变换进行重建图像的操作则称为逆Radon变换。Radon变换和逆Radon变换对CT成像的意义在于，它从数学原理上证实了通过物体某一断层层面“沿直线衰减分布的投影”重建该层面单位体积，即体素的线性衰减系数两维空间分布的可能性。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条