搜索结果: 1-15 共查到“物理学 Pulse”相关记录46条 . 查询时间(0.078 秒)
UCF Researchers Set Record for Fastest Light Pulse— Again（图）
UCF Researchers Set Record Fastest Light Pulse
2017/9/4
A research team at the University of Central Florida has demonstrated the fastest light pulse ever developed, a 53-attosecond X-ray flash.The group led by Professor Zenghu Chang beat its own record se...
APPLICABILITY OF FIRST PULSE DERIVED DIGITAL TERRAIN MODELS FOR BOREAL FOREST STUDIES
DTM quality first pulse last pulse laser scanning TIN grid
2015/8/13
Detailed high-resolution digital terrain models (DTM) can be obtained using airborne laser scanner data. This paper evaluates the
accuracy of DTM derived from first return of laser scanner data for f...
FROM SINGLE-PULSE TO FULL-WAVEFORM AIRBORNE LASER SCANNERS: POTENTIAL AND PRACTICAL CHALLENGES
Laser scanning Digitisation Retrieval Vegetation
2015/6/1
Airborne laser scanning, often referred to as lidar or laser altimetry, is a remote sensing technique which measures the round-trip
time of emitted laser pulses to determine the topography of the Ea...
Optical dipole force on ladder-like three-level atomic systems driven by chirped few-cycle-pulse laser fields
Optical dipole force ladder-like three-level atomic systems chirped few-cycle-pulse laser fields Optics
2012/5/17
We report a study on the optical dipole force in a ladder like three level atomic systems in the context of coherent population transfer with the chirped few-cycle-pulse laser fields. The phenomenon o...
Spectral Bandwidth Reduction of Thomson Scattered Light by Pulse Chirping
Spectral Bandwidth Reduction of Thomson Light Pulse Chirping Optics
2012/4/19
Based on single particle tracking in the framework of classical Thomson scattering with incoherent superposition, we developed a fully relativistic, three dimensional numerical code that calculates an...
New erasable thermal phase-change superresolution ~EPSR! disks composed of mask and recording layers can increase recording density by the detection of the below-diffraction-limited marks within the r...
Magnetically induced superresolution by center aperture detection (MSR-CAD) using pulsed and conventional dcshemes were applied to magneto-optical disks to quantitatively enaluate readout performances...
Threshold Characteristics of Pulse Loads Causing Fracture on an Example of Concrete and Rocks
threshold pulse crack extension electrical expl osion of conductor fr acture energy concrete rocks
2012/9/24
The technique of definition of threshold parameters of an impact is shown. The experimental results on crack extension in concrete and rocks under the short pulse (2 μ s) of loading are presented. Th...
An Optical Fibre Pulse Rate Multiplier for Ultra-low Phase-noise Signal Generation
Optical Fibre Ultra-low Phase-noise Signal
2011/9/6
In this letter we report on an all optical-fibre approach to the synthesis of ultra-low noise microwave signals by photodetection of femtosecond laser pulses. We use a cascade of Mach-Zehnder fibre in...
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 ...
Analysis and Optimisation of Pulse Dynamics for Magnetic Stimulation
Magnetic stimulation, TMS, inductive stimulation, waveform optimization,neuron model, loss power.
2011/9/2
Magnetic stimulation is a standard tool in brain research and many elds of neurology, as well as psychiatry. From a physical perspective, one key aspect of this method is the ineciency of available ...
Semianalytic theory of self-similar optical propagation and mode locking using a shape-adaptive model pulse
Semianalytic shape-adaptive model pulse
2011/9/1
A semi-analytic theory for the pulse dynamics in similariton amplifiers and lasers is presented,based on a model pulse with adaptive shape. By changing a single parameter, this test function can be co...
We consider a general problem of laser pulse heating of spherical metal particles with the sizes ranging from nanometers to millimeters. We employ the exact Mie solutions of the di raction problem and...
Scintillation decay time and pulse shape discrimination in oxygenated and deoxygenated solutions of linear alkylbenzene for the SNO+ experiment
Scintillation decay time pulse shape discrimination linear alkylbenzene the SNO+ experiment
2011/4/6
Scintillation decay time and pulse shape discrimination in oxygenated and deoxygenated solutions of linear alkylbenzene for the SNO+ experiment 。
Time-resolved quantitative multiphase interferometric imaging of a highly focused ultrasound pulse
Time-resolved quantitative multiphase interferometric imaging ultrasound pulse
2010/11/16
Interferometric imaging is a well established method to image phase objects by mixing the image wavefront with a reference one on a CCD camera. It has also been applied to fast transient phenomena, m...