搜索结果: 1-15 共查到“理学 pulses”相关记录60条 . 查询时间(0.044 秒)
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Geometric Singular Perturbation Theory and Traveling Pulses with Monotone Tails in a Diffusive Rosenzweig MacArthur Model
扩散 罗森茨威格麦克阿瑟模型 几何奇异摄动理论 单调尾巴行进脉冲
2023/5/5
In this talk, we first briefly review history of the geometric singular perturbation theory, then talk about the traveling pulses for a diffusive Rosenzweig MacArthur model. We show the existence of t...
Cornell engineers used precisely timed laser pulses to control changeable properties in a quantum material, pioneering a method that may have wide applications across a class of materials with immense...
Comparison of methods of determining meteoroid range rates from linear frequency modulated chirped pulses
determining meteoroid modulated chirped pulses
2017/3/22
In this paper we present three methods for evaluating range rates of meteoroids
passing through the ionosphere, using linear frequency modulated (LFM) chirped pulse
data from the ALTAIR radar. The f...
Spatial-temporal structure of seismicity of the North Tien Shan and its changeunder effect of high energy electromagnetic pulses
earthquake initiated seismicity electromagnetic pulse
2015/9/14
The effect of high-energy electromagnetic pulses emitted by a magnetohydrodynamic generator used as a source for deep electrical sounding of the crust on spatial-temporal structure of seismicity of th...
Formation of a laccolith by magma pulses: Evidence from modal and chemical composition of the 500 m long borehole section through the Permo-Carboniferous Landsberg laccolith (Halle Volcanic Complex)
laccolith formation magma pulses rhyolite Halle Volcanic Complex
2017/4/10
The 500 m long section through the upper part of the Permo-Carboniferous Landsberg laccolith (Halle Volcanic Complex)
was sampled every 25 meters. The modal proportions between plagioclase and K-feld...
Vast ranges of volcanoes hidden under the oceans are presumed by scientists to be the gentle giants of the planet, oozing lava at slow, steady rates along mid-ocean ridges. But a new study shows that ...
Short-lived tectonic switch mechanism for long-term pulses of volcanic activity after mega-thrust earthquakes
Short-lived tectonic switch mechanism long-term pulses volcanic activity mega-thrust earthquakes
2015/1/6
Eruptive rates in volcanic arcs increase significantly after subduction mega-thrust earthquakes. Over short to intermediate time periods the link between mega-thrust earthquakes and arc response can b...
Characterization and Interactions of Ultrafast Surface Plasmon Pulses
Femtosecond pulse tracking Heterodyne detection Near-field scanning optical microscope Plasmonic nanostructures Spectral bandwidth Ultrafast Surface Plasmon
2014/11/20
Surface Plasmon Polaritons (SPPs) are considered to be attractive components for plasmonics and nanophotonic devices due to their sensitivity to interface changes, and their ability to guide and confi...
New study shows three abrupt pulses of CO2 during last deglaciation（图）
last deglaciation study
2014/12/1
CORVALLIS, Ore. – A new study shows that the rise of atmospheric carbon dioxide that contributed to the end of the last ice age more than 10,000 years ago did not occur gradually, but was characterize...
Bright pulses of light could make space veggies more nutritious, says CU-Boulder study（图）
light nutritious Bright pulses
2014/3/20
Exposing leafy vegetables grown during spaceflight to a few bright pulses of light daily could increase the amount of eye-protecting nutrients produced by the plants, according to a new study by resea...
Unphysical artifacts are responsible for molecular orientation with half-cycle pulses
Unphysical artifacts molecular orientation half-cycle pulses Chemical Physics
2012/5/31
Sub-cycle electromagnetic pulses in the Terahertz region are considered to be one of the best ways to orient molecules. The simplest option corresponds to half-cycles pulses in the sudden regime, for ...
Birefringence of small apertures for shaping ultrashort pulses
Birefringence of small apertures ultrashort pulses Optics
2012/4/27
For ultrashort pulses having different states of polarization, the experienced time delay when passing through small apertures is different. In the case of a small slit (or a circular aperture), we re...
Making the best of mixed-field orientation of polar molecules: A recipe for achieving adiabatic dynamics in an electrostatic field combined with laser pulses
mixed-field orientation of polar molecules recipe adiabatic dynamics electrostatic field laser pulses Chemical Physics
2012/4/24
We have experimentally and theoretically investigated the mixed-field orientation of rotational-state-selected OCS molecules and we achieve strong degrees of alignment and orientation. The applied mod...
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...
Generation of isolated attosecond pulses in the far field by spatial filtering with an intense few-cycle mid-infrared laser
isolated attosecond pulses the far field intense few-cycle mid-infrared laser
2011/8/5
Abstract: We report theoretical calculations of high-order harmonic generation (HHG) of Xe with the inclusion of multi-electron effects and macroscopic propagation of the fundamental and harmonic fiel...