A5100622955- Adaptive optics and wavefront sensing
- Optical Polarization and Ellipsometry
- Calibration and Measurement Techniques
- Optical Systems and Laser Technology
- Advanced optical system design
- Infrared Target Detection Methodologies
- Optical Coatings and Gratings
- Advanced Measurement and Detection Methods
- Oceanographic and Atmospheric Processes
- Climate variability and models
- Remote Sensing in Agriculture
- Soil Geostatistics and Mapping
- Meteorological Phenomena and Simulations
- Photonic and Optical Devices
- Optical and Acousto-Optic Technologies
- Optical measurement and interference techniques
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Particle Accelerators and Free-Electron Lasers
- Geochemistry and Geologic Mapping
- Space Satellite Systems and Control
- Spectroscopy and Laser Applications
- Inertial Sensor and Navigation
- Image Processing Techniques and Applications
- Spectroscopy and Quantum Chemical Studies
First Affiliated Hospital of Jinan University
2025
Changchun Institute of Optics, Fine Mechanics and Physics
2015-2024
Chinese Academy of Sciences
2015-2024
University of Chinese Academy of Sciences
2009-2024
Beijing Sanbo Brain Hospital
2024
Capital Medical University
2021-2024
Capital University
2021-2024
Institute of Atmospheric Physics
2004-2023
Institute of Acoustics
2018
National Administration of Surveying, Mapping and Geoinformation of China
2017
Polarimetry is one of the most promising types remote sensing for improved characterization atmospheric aerosol. Indeed, aerosol particles constitute a highly variable component characterized by large number parameters describing particle sizes, morphologies (including shape and internal structure), absorption scattering properties, amounts, horizontal vertical distribution, etc. Reliable monitoring all these very challenging, therefore effects on climate environment are considered to be...
Visible and near-infrared (Vis-NIR) spectroscopy technique has been recognized as a cost-effective, rapid, non-destructive alternative to traditional soil physicochemical analysis estimate properties over the past few decades. Most efforts are devoted selection of characteristic wavelengths eliminate uninformative variables while ignoring impact spectral resolution these on prediction accuracy properties. Therefore, originality this study is identify with optimal achieve better performance....
Soil organic matter (SOM) content is an important indicator to measure the degradation degree and fertility of soil. However, most current SOM prediction methods are based on statistical learning theory, overlooking transmission process physical mechanism reflectance spectra, lacking basis soil remote sensing. In this study, a method for estimating spectral indices constructed by improved Hapke model was proposed, which started from radiative transfer spectra used converted r single...
Tensor polarization observables ( t20, t21, and t22) have been measured in elastic electron-deuteron scattering for six values of momentum transfer between 0.66 1.7(GeV/c)2. The experiment was performed at the Jefferson Laboratory Hall C using electron High Momentum Spectrometer, a specially designed deuteron magnetic channel recoil polarimeter POLDER. new data determine to much larger Q2 charge form factors GC GQ. They are good agreement with relativistic calculations disagree perturbative...
The variation and the spatial–temporal distribution of soil water content have significant effects on heat balance, agricultural moisture, etc. A moisture (SM) retrieval model can provide a theoretical basis for realizing rapid test revealing surface water. However, remote sensors do not measure directly. Therefore, it is great importance to establish SM model. In this paper, relationship between diffuse reflectance was first derived using absorption coefficient scattering related SM. Then,...
The ratio of the proton's electric to magnetic form factor, ${G}_{E}/{G}_{M}$, can be extracted in elastic electron-proton scattering by measuring cross sections, beam-target asymmetry, or recoil polarization. Separate determinations ${G}_{E}/{G}_{M}$ sections and polarization observables disagree for ${Q}^{2}>1$ (GeV/$c){}^{2}$. Measurement a third technique might uncover an unknown systematic error either previous measurements. asymmetry has been measured at ${Q}^{2}$ = 1.51...
Most computer-aided alignment methods for optical systems are based on numerical algorithms at present, which omit aberration theory. This paper presents a novel algorithm three-mirror anastigmatic (TMA) telescopes using Nodal Aberration Theory (NAT). The field decenter vectors and boresight error of misaligned TMA derived. Two models 3rd 5th order NAT established successively compared in the same example. It is found that average maximum RMS wavefront errors whole view 0.3° × 0.15° 0.063 λ...
We have examined the spin structure of proton in region nucleon resonances (1.085 GeV<W<1.910 GeV) at an average four momentum transfer Q2=1.3 GeV2. Using Jefferson Lab polarized electron beam, a spectrometer, and solid target, we measured asymmetries A∥ A⊥ to high precision, extracted A1 A2, functions g1 g2. found notably nonzero A⊥, significant contributions from higher-twist effects, only weak support for quark-hadron duality.Received 1 August...
Rotatable retarder fixed polarizer (RRFP) Stokes polarimeters, which employ uniformly spaced angles over 180° or 360°, are most commonly used to detect the state of polarization (SOP) an electromagnetic (EM) wave. The misalignment error is one major sources. We suppose that errors obey a uniform normal distribution and independent each other. Then, we derive analytically covariance matrices measurement errors. Based on derived, can conclude 1) incident intensity s0, but seriously depend...
This paper presents a method to calibrate alignment errors for channeled spectropolarimeter. A calibration model, including an determination model and compensation is derived firstly. To determine the exact of high-order retarders polarizer included in spectropolarimeter, auxiliary retarder reference beam are used. The does not affect normal use spectropolarimeter polarization state needs be controlled accurately. Based on results, compensated by using correction algorithm without any...
This paper presents a systematic and in-depth discussion for the aberration fields of off-axis two-mirror astronomical telescopes with an offset pupil that is induced by lateral misalignment. Based on framework nodal theory system level coordinate transformation, function misaligned derived. Some general descriptions misalignment-induced aberrations are presented. The specific astigmatic coma field characteristics in then discussed. precision presented expressions demonstrated. discrepancies...
Soil moisture strongly interferes with the spectra of soil organic matter (SOM) in near-infrared region, which reduces correlation between and decreases accuracy prediction SOM. In this study, we explored feasibility two types spectral indices, two- three-band mixed (SI) indices (SI3), water removal algorithms, direct standardization (DS) external parameter orthogonalization (EPO), to estimate SOM wet soils using a total 192 samples at six content gradients. The estimation accuracies...
Heterodyne efficiency is referred as a measure of the quality for coherent laser communication. The heterodyne not only reflects matching phase and amplitude between received signal local oscillator, but also reveals polarization two beams. Different from common efficiency, revised proposed by considering aberrations optical system. Based on Polar Pauli-Zernike decomposition algorithms, effects output states are analyzed shown graphically. variations investigated including separate component...
Abstract The Three-North Afforestation Program (TNAP), initiated in 1978 and scheduled to be completed 2050, is the world’s largest afforestation project covers 4.07 x 10 6 km 2 (42.4%) of China. We systematically assessed goals outcomes first 30 years TNAP using high-resolution remote sensing ground survey data. With almost 23 billion dollars invested between 2008, forested area within region increased by 1.20 × 7 ha, but proportion high quality forests declined 15.8%. establishment...
In active optics systems, one concern is how to quantitatively separate the effects of astigmatic and trefoil figure errors misalignments that couple together in determining total aberration fields when wavefront measurements are available at only a few field points. this paper, we first describe impact mount-induced deformation on net by proposing modified theoretical formulation for field-dependent behavior freeform surfaces based framework nodal theory. This explicitly expresses...