A5101463645- Radioactivity and Radon Measurements
- Photonic and Optical Devices
- Stellar, planetary, and galactic studies
- Advanced Optical Sensing Technologies
- Radioactive contamination and transfer
- Advanced Fiber Laser Technologies
- Advanced Fiber Optic Sensors
- Advanced Measurement and Metrology Techniques
- Nuclear Physics and Applications
- Astrophysics and Star Formation Studies
- Laser Material Processing Techniques
- Rheology and Fluid Dynamics Studies
- Ocular and Laser Science Research
- Optical Coherence Tomography Applications
- Optical Systems and Laser Technology
- Mechanical and Optical Resonators
- Diamond and Carbon-based Materials Research
- Astronomy and Astrophysical Research
- Quantum Information and Cryptography
- Electromagnetic Simulation and Numerical Methods
- Radiation Therapy and Dosimetry
- Radiation Dose and Imaging
- Force Microscopy Techniques and Applications
- Astro and Planetary Science
- Electromagnetic Scattering and Analysis
Dongseo University
2024
China University of Petroleum, East China
2024
Southwest University of Science and Technology
2024
Tianjin University
2019-2024
University of Electronic Science and Technology of China
2022
Visual Sciences (United States)
2021
University of Chicago
2021
National Institute for Radiological Protection
2009-2019
Chinese Center For Disease Control and Prevention
2012-2019
Purple Mountain Observatory
2016-2018
We directly compute, for the first time, a confining "tube" potential acting on flexible or semiflexible polymer chain entangled with like chains using equilibrium molecular dynamics simulations and compare these results to conventional tube diameter inferred from plateau in time-dependent relaxation modulus G(t) an apparent crossover time τe t1/2 t1/4 scaling monomer diffusivity g2(t). find that "narrow" obtained at equilibration τe, where "feels" it is tube, widens as softens develops...
The conjecture that branched polymers relax hierarchically in entangled melts is herein verified using microscopic molecular dynamics (MD) simulations of symmetric and asymmetric star made possible by an efficient equilibration method. At time scales less than the short-arm relaxation time, branch point remains anchored within a length scale tube diameter. Once short arm relaxes, takes random hop along confining where distinct "hop" can be visualized directly simulation. much larger becomes...
Frequency scanning interferometry (FSI) is a promising technique for absolute distance measurement and has been demonstrated in many industrial applications. However, practice, the precision limited sensitive to variations of measured while sweeping optical frequency laser. The induced errors would be amplified by hundreds times due magnification effect. In this paper, an incremental interferometer was established on basic scheme FSI system monitoring distance. compensation could achieved...
The timely and accurate recognition of multi-type structural surface damage (e.g., cracks, spalling, corrosion, etc.) is vital for ensuring the safety service performance civil infrastructure accomplishing intelligent maintenance smart cities. Deep learning computer vision have made profound impacts on automatic using nondestructive test techniques, especially non-contact vision-based algorithms. However, accuracy highly depends training data volume completeness in conventional supervised...
We used the newly commissioned 50 cm Binocular Network (50BiN) telescope at Qinghai Station of Purple Mountain Observatory (Chinese Academy Sciences) to observe old open cluster NGC 188 in V and R as part a search for variable objects. Our time-series data span total 36 days. Radial velocity proper-motion selection resulted sample 532 genuine members. Isochrone fitting was applied cleaned sequence, yielding distance modulus (m - M)0V = 11.35 \pm 0.10 mag foreground reddening E(V R) 0.062...
We present a photometric study of the short-period eclipsing binary NSVS4484038. Time-series CCD photometry star in B and V band was carried out. An orbital period 0.218551 days determined for revised linear ephemeris given. The first solution system detected through light-curve synthesis using Wilson–Devinney method. It reveals an overcontact configuration with filling-out factor about 10%. mass ratio to be 2.74 inclination 721. less massive secondary component is found have higher surface...
Multi-channel synchronous distance measurement is of great significance for the structural network monitoring large-scale equipment manufacturing. The precision, efficiency, flexibility directly impacts operation quality in In this paper, we propose a multi-channel rapid absolute (ADM) system based on frequency scanning interferometry (FSI). A dual-interferometer structure was presented, by introducing optical intensity splitting inside interferometer to expand channels, reducing complexity...
We present a comprehensive photometric study of the pulsating, eclipsing binary OO Dra. Simultaneous B- and V-band photometry star was carried out on 14 nights. Revised orbital period new ephemeris were derived from data. The first solution system physical parameters component stars are determined. It reveals that Dra could be detached with less-massive secondary nearly filling in its Roche lobe. By subtracting light changes data, we obtained intrinsic pulsating curves hotter massive primary...
Photometric observations of AH Cnc, a W UMa-type system in the open cluster M67, were carried out by using 50BiN telescope. About 100 h time-series B- and V -band data taken, based on which eight new times light minima determined. By applying Wilson-Devinney method, curves modeled revised photometric solution binary was derived. We confirmed that Cnc is deep contact (f = 51%), low mass-ratio (q 0.156) system. Adopting distance modulus derived from study host cluster, we have re-calculated...
The health effects of suspended particulate matter (PM) in the air are well documented; however, there is a lack convenient tools to recognize and quantify PM onsite. Here, we design fabricate portable analysis system realize onsite aerosol particle analysis. contains micromachined virtual impactor (VI), thermophoretic deposition chip, smartphone-based imaging device. silicon dioxide (SiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> )...
SONG is a global ground-based network of 1m telescopes for stellar time-domain science, an international collaboration involving many countries across the world. In order to enable favorable duty cycle, plans create homogeneous distribution four nodes in each northern and southern hemispheres. An expected possibility was building one East Asia, preferably on Qinghai-Tibetan Plateau. During last decade, great deal effort has been invested searching high-quality site astronomy China, since...
Absolute distance measurements could be achieved by the technique of frequency scanning interferometry (FSI), which provide a micron-level accuracy over several tens meters. However, as range and increasing, measurement resolution would seriously influenced dispersion mismatch effect, is mainly caused difference between optical fiber air. A compensation method was proposed in this paper, effect suppressed effectively without complicated calculations for each single measurement. The chirp...
In order to study the influence of dual-wavelength laser conditioning on ultraviolet damage characteristics DKDP crystals, 3 ω (355nm) and 1 (1064nm) lasers with different energy ratios were used in crystals simultaneously. case single-wavelength conditioning, scan raster scanning increasing density lower than crystal threshold. is irradiated by at same time fluence ratios. region, a constant varied. The samples under irradiation (evaluated probability curve density) are obtained...
Planar Tur\'an number, denoted by $ex_{\mathcal{P}}(n,H)$, is the maximum number of edges in an $n$-vertex planar graph which does not contain $H$ as a subgraph. Ghosh, Gy\H{o}ri, Paulos and Xiao initiated topic for double stars. For balanced star, $S_{3,3}$ only remaining need to be considered. In this paper, we give exact value $ex_{\mathcal{P}}(n,S_{3,3})$, forcing all stars completely determined.
Accurate measurement of length is an important foundation for ensuring the quality advanced manufacturing equipment. In recent years, absolute ranging technology represented by frequency scanning interferometry (FSI) has gradually become a widely used method in industry due to its advantages high precision, flexibility, and no range ambiguity. To address repeatability accuracy reference calibration FSI ranging, this paper proposes accurately calibrating based on bidirectional absorption...