搜索结果: 1-15 共查到“理学 Doppler”相关记录50条 . 查询时间(0.106 秒)
WIND SHEAR IDENTIFICATION WITH THE RETRIEVAL WIND OF DOPPLER WEARTH RADAR
Wind shear Doppler weather radar Conventions Wind field retrieval Guangzhou
2018/5/17
A new method, which based on the wind field retrieval algorithm of Volume Velocity Process (VVP), has been used to identified the intensity of wind shear occurred in a severe convection process in Gua...
Ionospheric Doppler measurements by means of HF-radar techniques
shift Doppler ionosphere plasma drift
2015/9/10
Studies of the dynamics of the ionosphere and its related phenomena are mainly based on Doppler Drift measurements. The time variation (ionisation/recombination) of plasma density, thermospheric wind ...
Mission impossible? New England's snowstorm 'bomb' from inside a Doppler-on-Wheels（图）
Mission impossible New England's snowstorm bomb inside a Doppler-on-Wheels
2015/3/4
Jan. 26, 2015.The day computer models forecast one of the most intense snowstorms in history. Meteorologists call it a "bomb."The bomb would hit coastal New England that afternoon. And night. And the ...
9th International Symposium on Ultrasonic Doppler Methods for Fluid Mechanics and Fluid Engineering
Ultrasonic Doppler Methods The ultrasound Doppler method
2013/10/30
On behalf of the organising committee, I am pleased to invite you to come to ISUD-9 to be held in Strasbourg.The ultrasound Doppler method has been successfully established for fluid flow measurements...
Doppler-compensated three-photon electromagnetically induced transparency
Doppler-compensated three-photon electromagnetically transparency Atomic Physics
2012/5/31
We demonstrate Doppler-compensated bright and dark states in a resonant four-level atomic system. The spectral features are the result of electromagnetically induced transparency (EIT) and absorption ...
Deducing radiation pressure on a submerged mirror from the Doppler shift
submerged mirror the Doppler shift Optics
2012/5/29
Radiation pressure on a flat mirror submerged in a transparent liquid, depends not only on the refractive index n of the liquid, but also on the phase angle psi_0 of the Fresnel reflection coefficient...
Interferometric thermometry of a single sub-Doppler cooled atom
Interferometric thermometry single sub-Doppler cooled atom
2012/2/28
Efficient self-interference of single-photons emitted by a sideband-cooled Barium ion is demonstrated. First, the technical tools for performing efficient coupling to the quadrupolar transition of a s...
Questioning the Doppler interpretation of cosmological red shifts
cosmological red shifts the Doppler interpretation of cosmological red shifts the Hubble law of cosmological red shifts
2011/9/26
The Doppler interpretation of cosmological red shifts attributes these red shifts to only the relativistic Doppler effect of light coming from receding galaxies. We question this interpretation of cos...
Doppler cooling to the Quantum limit
Doppler Quantum limit Atomic Physics single scattering events
2011/8/4
Abstract: Doppler cooling on a narrow transition is limited by the noise of single scattering events. It shows novel features, which are in sharp contrast with cooling on a broad transition, such as a...
Sub-Doppler laser cooling of potassium atoms
Sub-Doppler laser potassium atoms Quantum Gases
2011/8/4
Abstract: We investigate sub-Doppler laser cooling of bosonic potassium isotopes, whose small hyperfine splitting has so far prevented cooling below the Doppler temperature. We find instead that the c...
Influence of Doppler Bin Width on GNSS Detection Probabilities
GNSS acquisition Doppler bin width receiver operating characteristics
2011/9/1
Abstract: The acquisition stage in GNSS receivers determines Doppler shifts and code phases of visible satellites. Acquisition is thus a search in two continuous dimensions, where the digital algorith...
Doppler-free two-photon resonances for atom detection and sum frequency stabilization
Doppler-free two-photon atom
2011/8/29
We investigate the excitation of the 5D5/2 level in Rb atoms using counterpropagating laser beams, which are nearly resonant to the one-photon 5S1/2 !5P3/2 and 5P3/2 ! 5D5/2 transitions, ensuring that...
The Doppler Shadow of WASP-3b: A tomographic analysis of Rossiter-McLaughlin observations
Earth and Planetary Astrophysics (astro-ph.EP)
2011/1/6
Hot-Jupiter planets must form at large separations from their host stars where the temperatures are cool enough for their cores to condense. They then migrate inwards to their current observed orbital...
Solar Meridional Circulation from Doppler Shifts of the Fe I line at lambda 5250 Angstroms as Measured by the 150-foot Solar Tower Telescope at the Mt. Wilson Observatory
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/23
Doppler shifts of the Fe I spectral line at lambda5250 Angstroms from the full solar disk obtained over the period 1986 to 2009 are analyzed to determine the circulation velocity of the solar surface ...
Inductive Magnetic Footpoint Tracking by Combining the Minimum Energy Fit with the Local Correlation Tracking and Doppler Velocity
Velocity magnetic field induction equation
2010/9/15
Time-dependent magneto-hydrodynamic simulations of active region coronal magnetic field require the underlying photospheric magnetic footpoint velocities. The minimum energy fit (MEF) is a new velocit...