Results 21 to 30 of about 169,741 (316)
Adaptive dictionary learning based on local configuration pattern for face recognition
EURASIP Journal on Advances in Signal Processing, 2020 Sparse representation based on classification and collaborative representation based classification with regularized least square has been successfully used in face recognition.
Dongmei Wei +5 more
doaj +1 more source
Remote Sensing, 2023 This paper examines the effects of temperature and humidity on the absorption spectrum and concentration of nitrous oxide (N2O) using a compact, portable open optical-path gas detection sensor system.
Jiahong Chen +7 more
doaj +1 more source
Opto-optical light deflection [PDF]
Applied Optics, 1983 Light deflection is accomplished by diffraction from a transient index modulation established as a grating of variable frequency in an optical material by the interference of two controlling light beams. This device may be considered an opto-optical analog to an acoustooptical deflector, in that a change in angular deflection is created by altering the
Sincerbox, Gleen T., Roosen, Gérald
openaire +3 more sources
Topological birefraction of elastic waves in phononic crystals [PDF]
AIP AdvancesThe refraction of waves at the interface between two different media is one of the most common phenomena in nature, which is always accompanied by reflection.
Yichong Hu +4 more
doaj +1 more source
Method to evaluate errors of Mie-Lidar in the transition zone with a dual CCD laser system
Results in Physics, 2022 Mie Scattering Light Detection and Ranging (Mie-Lidar) is the most frequently used tool for obtaining the vertical profile of aerosol extinction coefficients. However, Mie-Lidar has an area that is not fully overlapping (called a transition zone) several
Yue-Feng Zhao +7 more
doaj +1 more source
Nanophotonics, 2023 We numerically investigate second harmonic generation (SHG) from a monolayer of 2D-material placed on photonic moiré superlattice fabricated by dielectric materials.
Ning Tingyin +4 more
doaj +1 more source
Photonics, 2023 We use the extended Huygens–Fresnel integral to analyze the propagation properties of a class of partially coherent beams with Laguerre non-uniform coherence properties (called Laguerre non-uniformly correlated beams) in free space and in a turbulent ...
Yang Zhao +6 more
doaj +1 more source
Nanostructures + Light = ‘New Optics’ [PDF]
Journal of Optics A: Pure and Applied Optics, 2005 Suddenly, at the end of the last century, classical optics and classical electrodynamics became fashionable again. Fields that several generations of researchers thought were comprehensively covered by the famous Born and Wolf textbook and were essentially dead as research subjects were generating new excitement.
Zheludev, N.I., Shalaev, V.
openaire +1 more source
Data Processing and Analysis of Eight-Beam Wind Profile Coherent Wind Measurement Lidar
Remote Sensing, 2021 Real-time measurement of atmospheric wind field parameters plays an important role in weather analysis and forecasting, including improving the efficiency of wind energy, particle tracking, boundary layer measurements, and airport security. In this study,
Yuefeng Zhao +7 more
doaj +1 more source
Fermat's principle and the formal equivalence of local light-ray rotation and refraction at the interface between homogeneous media with a complex refractive index ratio [PDF]
, 2009 We derive a formal description of local light-ray rotation in terms of complex refractive indices. We show that Fermat's principle holds, and we derive an extended Snell's law.
Hamilton, A.C., Courtial, J., Sundar, B.
core +1 more source