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A THRESHOLD-FREE FILTERING ALGORITHM FOR AIRBORNE LIDAR POINT CLOUDS BASED ON EXPECTATION-MAXIMIZATION
Airborne LiDAR Point clouds Filtering Ground points Expectation-maximization Intensity
2018/5/14
Filtering is a key step for most applications of airborne LiDAR point clouds. Although lots of filtering algorithms have been put forward in recent years, most of them suffer from parameters setting o...
Researchers identify free-flowing aerosol particles using holograms,lasers（图）
Researchers identify free-flowing aerosol particles holograms lasers
2017/10/25
Holographic images of free-flowing air particles may help climate change and biological weapons watchdogs better monitor the atmosphere, according to a recent Kansas State University study.Principle i...
MARKER-FREE REGISTRATION OF TERRESTRIAL LASER SCANS USING THE NORMAL DISTRIBUTION TRANSFORM
LIDAR Laser scanning Terrestrial Registration Matching
2015/8/7
The registration of scan data often uses special markers which are placed in the scene. This leads to a reliable registration
but the method is not very efficient. Therefore, we search for a re...
Competition between electronic Kerr and free carrier effects in an ultimate-fast optically switched semiconductor microcavity
electronic Kerr free carrier effects semiconductor microcavity Optics
2012/5/17
We have performed ultrafast pump-probe experiments on a GaAs-AlAs microcavity with a resonance near 1300 nm in the "original" telecom band. We concentrate on ultimate-fast optical switching of the cav...
Electric dipole-free interaction of visible light with silver metadimers
Electric dipole-free interaction visible light silver metadimers Optics
2012/4/19
In subwavelength-sized particles, light-induced multipole moments of orders higher than the electric dipole are usually negligibly small, which allows for the light-matter interaction to be accurately...
Immunity of information encoded in decoherence-free subspaces to particle loss
information decoherence-free subspaces particle loss
2011/8/17
Abstract: We demonstrate that for an ensemble of qudits, subjected to collective decoherence in the form of perfectly correlated random SU(d) unitaries, quantum superpositions stored in the decoherenc...
100 MHz Amplitude and Polarization Modulated Optical Source for Free-Space Quantum Key Distribution at 850 nm
100 MHz Amplitude Polarization Modulated Optical Source Free-Space Quantum Key Distribution 850 nm
2010/10/19
We report on an integrated photonic transmitter of up to 100 MHz repetition rate, which emits pulses centered at 850 nm with arbitrary am-plitude and polarization. The source is suitable for free spac...
Incoherent interaction of nematicons in bias-free liquid-crystal cells
Nonlinear optics liquid crystals nematicons
2010/4/8
We study experimentally the propagation dynamics and interaction of a pair of mutually incoherent nematicons: spatial optical solitons in nematic liquid crystals. In contrast to earlier studies, we co...
Harmonic operation of high gain harmonic generation free electron laser
harmonic operation HGHG FEL
2009/8/14
In high gain harmonic generation (HGHG) free electron laser (FEL), with the right choice of parameters of the modulator undulator, the dispersive section and the seed laser, one may make the spatial b...
Diffusive Reflecrance for the Free-space Light Propagation Theory
Diffusive Reflecrance Free-space Light Propagation Theory
2015/5/4
Based on the free-space light propagation theory, the non-contact measurement technique for optical tomog-raphy provides high quality data-sets by using charge coupled device (CCD) camera for light de...
Spectra of Free Diquark in the Bethe-Salpeter Approach
Bethe-Salpeter equation diquark spectra
2007/8/15
2006Vol.46No.6pp.1031-1039DOI:
Spectra of Free Diquark in the Bethe-Salpeter Approach
YU Yan-Ming,1 KE Hong-Wei,1 DING Yi-Bing,2 GUO Xin-Heng,3
JIN Hong-Ying,4 LI Xue-Qian,1 SHEN ...