搜索结果: 1-15 共查到“理学 Pulse”相关记录93条 . 查询时间(0.103 秒)
MULTISPECTRAL PANSHARPENING APPROACH USING PULSE-COUPLED NEURAL NETWORK SEGMENTATION
Pansharpening PCNN Image Fusion Multispectral Imaging Remote Sensing Segmentation
2018/5/14
The paper proposes a novel pansharpening method based on the pulse-coupled neural network segmentation. In the new method, uniform injection gains of each region are estimated through PCNN segmentatio...
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...
New low power pulse compressed ionosonde at Gibilmanna Ionospheric Observatory
ionosonde automatic ionogram scaling ionospheric data vertical soundings
2015/9/10
A digital low power pulse compressed ionosonde was developed at the Istituto Nazionale di Geofisica e Vulcanologia
(INGV), Rome, Italy. The aim of this Advanced Ionospheric Sounder, AIS-INGV, is to r...
Some considerations for different time-domain signal processing of pulse compression radar
code correlation ionosphere radar time domain
2015/8/28
Radar technology has for a long time used various systems that allow detection under high-resolution conditions, while emitting at the same time low peak power. Among these systems, transmitted pulse ...
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...
Taking the Pulse of Marine Ecosystems: The Importance of Coupling Long-Term Physical and Biological Observations in the Context of Global Change Biology
Coupling Long-Term Physical Biological Observations
2015/7/16
Research programs that co-locate environmental sensors with "biology" can enable the linking of environmental data with changes in biological or ecological processes. The coastal and marine Long Term ...
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...
Newly detected short radio pulse appears to come from far beyond our galaxy（图）
Radio telescopes Pulse A quick radio burst Signal Radio The pulsar. The observatory The Milky Way
2014/7/18
The discovery of a split-second burst of radio waves using the Arecibo radio telescope in Puerto Rico provides important new evidence of mysterious pulses that appear to come from deep in outer space.
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...
Pulse-amplitude-resolved spectroscopy of bright accreting pulsars: indication of two accretion regimes
X-ray binaries – neutron stars – accretion
2011/10/8
Context: In addition to coherent pulsation, many accreting neutron stars exhibit flaring activity and strong aperiodic variability on time scales comparable to or shorter than their pulsation period. ...
On the pulse-width statistics in radio pulsars. II. Importance of the core profile components
stars:pulsars:general – stars:neutron – stars:rotation
2011/9/27
We performed a statistical analysis of half-power pulse-widths of the core components in average pulsar profiles. We confirmed an existence of the lower bound of the distribution of half-power pulse-w...