Results 11 to 20 of about 2,030,213 (301)

Denoising and Feature Extraction for Space Infrared Dim Target Recognition Utilizing Optimal VMD and Dual-Band Thermometry

Machines, 2022
Space target feature extraction and space infrared target recognition are important components of space situational awareness (SSA). However, owing to far imaging distance between the space target and infrared detector, the infrared signal of the target ...
Hao Zhang, Peng Rao, Xin Chen, Hui Xia, Shenghao Zhang   +4 more
doaj   +1 more source

Infrared analysis of propagators and vertices of Yang--Mills theory in Landau and Coulomb gauge [PDF]

, 2006
The infrared behaviour of gluon and ghost propagators, ghost-gluon vertex and three-gluon vertex is investigated for both the covariant Landau and the non-covariant Coulomb gauge.
H. Reinhardt, M. Leder, N. H. Christ, W. Schleifenbaum   +3 more
core   +2 more sources

Local Spatial–Temporal Matching Method for Space-Based Infrared Aerial Target Detection

Sensors, 2022
The feature of a space-based infrared signal is that the intensity of clutter is much stronger than that of an aerial target. Such a feature poses a great challenge to aerial target detection since the existing infrared target detection methods are prone
Lue Chen, Peng Rao, Xin Chen, Maotong Huang   +3 more
doaj   +1 more source

Near-Infrared Colours of Active Galactic Nuclei [PDF]

, 2009
We propose near-infrared colour selection criteria to extract Active Galactic Nuclei (AGNs) using the near-infrared Colour-Colour Diagram (CCD) and predict near-infrared colour evolution with respect to redshift.
Kouzuma, Shinjirou, Yamaoka, Hitoshi
core   +1 more source

High efficiency and fast van der Waals hetero-photodiodes with a unilateral depletion region

Nature Communications, 2019
Photovoltaic devices based on 2D materials still suffer from low quantum efficiencies due to interfacial charge recombination and inefficient contacts.
Feng Wu, Qing Li, Peng Wang, Hui Xia, Zhen Wang, Yang Wang, Man Luo, Long Chen, Fansheng Chen, Jinshui Miao, Xiaoshuang Chen, Wei Lu, Chongxin Shan, Anlian Pan, Xing Wu, Wencai Ren, Deep Jariwala, Weida Hu   +17 more
doaj   +1 more source

ISO continuum observations of quasars at z=1-4 I.Spectral energy distributions of quasars from the UV to far-infrared [PDF]

, 2000
Eight luminous quasars with $ -30 < M_B < -27$ at z = 1.4 - 3.7 have been observed in the mid- and far-infrared using ISO. All the quasars have been detected in the mid-infrared bands of ISOCAM, while no far-infrared detections have been made with ...
Andreani, Andreani, Bechtold, Benford, Bertin, Bloom, C. Gabriel, Carilli, Carilli, Casali, Cesarsky, Chini, Chini, Dunlop, E. Nishihara, Elvis, Green, Guilloteau, Guilloteau, H. Okuda, H. Shibai, Haas, Hamann, Herbstmeier, Hughes, Impey, Irwin, Isaak, Ivison, K. Kawara, Kawara, Kawara, Kessler, Kneib, Kobayashi, Kormann, Landolt, Lemke, Lichti, Magain, Matsuhara, McMahon, Neugebauer, Neugebauer, Ohta, Omont, Omont, Osmer, Pier, Puget, Richards, Rowan-Robinson, S. Oyabu, Sanders, Schneider, Starck, T. Hasegawa, Taniguchi, Y. Sato, Y. Sofue, Y. Taniguchi, Y. Tsuzuki, Yoshii   +62 more
core   +2 more sources

INFRARED QCD [PDF]

International Journal of Modern Physics E, 2009
We prove that Nambu–Jona-Lasinio model is an exact description of infrared Quantum ChromoDynamics (QCD) deriving it from QCD Lagrangian. The model we obtain is renormalizable and confining but, taking very small momenta fixes completely all the parameters of the Nambu–Jona-Lasinio model through those of QCD.
openaire   +2 more sources

High-Discrimination Circular Polarization Detection Based on Dielectric-Metal-Hybrid Chiral Metamirror Integrated Quantum Well Infrared Photodetectors

Sensors, 2022
Circular polarization detection enables a wide range of applications. With the miniaturization of optoelectronic systems, integrated circular polarization detectors with native sensitivity to the spin state of light have become highly sought after.
Jinyong Shen, Tianyun Zhu, Jing Zhou, Zeshi Chu, Xiansong Ren, Jie Deng, Xu Dai, Fangzhe Li, Bo Wang, Xiaoshuang Chen, Wei Lu   +10 more
doaj   +1 more source

Velocity Estimation for Space Infrared Dim Targets Based on Multi-Satellite Observation and Robust Locally Weighted Regression

Remote Sensing, 2023
Velocity estimation of space moving targets is a key part of space situational awareness. However, most of the existing methods do not consider the satellite observation process, and the performance mainly depends on the preset target motion state, which
Shenghao Zhang, Peng Rao, Hao Zhang, Xin Chen   +3 more
doaj   +1 more source

Infrared galaxies [PDF]

, 1998
To study large-scale structure in the Universe a full census of the contents are required. This is even more important when the processes of galaxy formation are being investigated.
Blain, Andrew W.
core   +3 more sources