搜索结果: 1-15 共查到“物理学 air”相关记录18条 . 查询时间(0.072 秒)
Electromagnetic fields in air of traveling-wave currents above the earth
Electromagnetic fields air of traveling-wave currents the earth
2015/10/16
The problem of the electromagnetic field created by a thin, straight conductor of infinite length carrying a forward traveling-wave current with a complex propagation constant g above a homogeneous an...
Propagation of gamma rays and production of free electrons in air
Propagation of gamma rays production of free electrons Plasma Physics
2012/4/20
A new concept of remote detection of concealed radioactive materials has been recently proposed \cite{Gr.Nusin.2010}-\cite{NusinSprangle}. It is based on the breakdown in air at the focal point of a h...
Waveform-Controlled Terahertz Radiation from the Air Filament Produced by Few-Cycle Laser Pulses
Waveform-Controlled Terahertz Radiation the Air Filament Few-Cycle Laser Pulses Optics
2012/4/20
Waveform-controlled Terahertz (THz) radiation is of great importance due to its potential application in THz sensing and coherent control of quantum systems. We demonstrated a novel scheme to generate...
H2/Air连续旋转爆震的试验实现及传播过程的三维数值模拟
连续旋转爆震 H2/Air组合 试验研究 三维数值模拟
2013/3/15
在环缝-喷孔对撞式喷注模型发动机上，采用H2/O2热射流切向喷注的起爆方式，进行了H2/Air组合的连续旋转爆震试验，试验成功起爆并实现了爆震波的持续旋转传播。切向喷注的热射流并没有直接诱导形成旋转爆震波，从点火到形成稳定传播的旋转爆震波之间存在时间间隔。高频信号时频分析结果表明，在该试验工况下，旋转爆震波的传播过程非常稳定，其传播频率在5.35-5.85kHz之间，平均传播频率为5.61kHz，...
High-brightness switchable multi-wavelength remote laser in air
High-brightness switchable multi-wavelength remote laser air
2011/8/5
Abstract: Remote laser in air based on amplified spontaneous emission (ASE) has produced rather well-collimated coherent beams in both backward and forward propagation directions, opening up possibili...
Third and fifth harmonics generation by tightly focused femtosecond pulses at 2.2 μm wavelength in air
harmonics focused femtosecond pulses
2011/9/6
We report experiments on the generation of third and fifth harmonics of millijoule-level, tightly focused, femtosecond laser pulses at 2.2 μm wavelength in air. The measured ratio of yields of the thi...
Comparison of hard x-ray production from various targets in air using a short pulse kHz laser with photon production from a high power multifilament laser beam from the same targets in air
multifilament short pulse kHz laser
2011/9/5
Over the last few years there has been much interest in the production of hard X-rays from various targets using a kHz short pulse laser at intensities above 1014Wcm-2 (A). Most of these studies have ...
Measurement of airborne 131I, 134Cs, and 137Cs nuclides due to the Fukushima reactors accident in air particulate in Milan (Italy)
Airborne radioactivity, Fukushima accident, 131I, 137Cs and 134Cs
2011/9/5
After the earthquake and the tsunami occurred in Japan on 11th March 2011, four of the Fukushima reactors had released in air a large amount of radioactive isotopes that had been diffused all over the...
The use of compressed air cannons in an undergraduate lab provides a way to illustrate the cooperation of diverse physics concepts, such as conservation of momentum, the work-kinetic energy theorem, e...
To the Question on Double Extensive Air Showers Nature
Question Double Extensive Air Showers Nature
2011/1/5
Double Extensive Air Showers were discovered over fourth century back. But up to now there is no adequate explanation of its nature. In this paper is expected that such showers are the result of break...
Spectral dependence of purely-Kerr driven filamentation in air and argon
Spectral dependence purely-Kerr driven filamentation argon
2010/11/16
Based on numerical simulations, we show that higher-order nonlinear indices (up to $n_8$ and $n_{10}$, respectively) of air and argon have a dominant contribution to both focusing and defocusing in t...
A future project at tibet：the large high altitude air shower observatory (LHAASO)
air shower detector array gamma ray astronomy cosmic ray
2010/5/7
Gamma ray source detection above 30 TeV is an encouraging approach for finding galactic cosmic ray sources. All sky survey for gamma ray sources using wide field of view detector is essential for popu...
An updated search of steady TeV γ-ray point sources in northern hemisphere using the Tibet air shower array
ASγ experiment γ-ray point sources 90% C.L. flux pper limits
2009/8/17
Using the data taken from Tibet II High Density (HD) Array (1997 February—1999 September) and Tibet-III array (1999 November—2005 November), our previous northern sky survey for TeV γ-ray point source...
期刊信息
篇名
Characterization of airborne individual particles collected in an urban area, a satellite city and a clean air site in Beijing, 2001.
语种
英文
撰写或编译
撰写
作者
Shi Zongbo,Shao Longyi,Jones,T. P.,Whitt...
Air Moisture Sensing Properties of ZnCr2O4--K2CrO4 Composites
relative humidity constant phase elements X-rays
2010/4/12
Crystalline structure, surface morphology and the response to air moisture of ceramic system of composition ZnCr2O4 - KrCrO4 formed by solid state reaction at elevated temperatures were investigated. ...