D. Chen

ORCID: 0000-0003-1433-0716
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About
Contact & Profiles
Research Areas
  • Pulsars and Gravitational Waves Research
  • Astrophysics and Cosmic Phenomena
  • Gamma-ray bursts and supernovae
  • Radio Astronomy Observations and Technology
  • Dark Matter and Cosmic Phenomena
  • Geophysics and Sensor Technology
  • Cosmology and Gravitation Theories
  • Astrophysical Phenomena and Observations
  • Geophysics and Gravity Measurements
  • Solar and Space Plasma Dynamics
  • Neutrino Physics Research
  • High-pressure geophysics and materials
  • Particle Detector Development and Performance
  • Seismic Waves and Analysis
  • Superconducting Materials and Applications
  • Meat and Animal Product Quality
  • Particle physics theoretical and experimental studies
  • Phytochemicals and Antioxidant Activities
  • Lightning and Electromagnetic Phenomena
  • Advanced Frequency and Time Standards
  • Dental Implant Techniques and Outcomes
  • Bone Tissue Engineering Materials
  • Magnetic confinement fusion research
  • Tea Polyphenols and Effects
  • Food Quality and Safety Studies

Tea Research Institute
2021-2024

Chinese Academy of Agricultural Sciences
2021-2024

National Astronomical Observatory of Japan
2021-2024

Shaanxi University of Science and Technology
2021-2024

National Astronomical Observatories
2023

Chinese Academy of Sciences
2023

Institute of High Energy Physics
2023

University of Chinese Academy of Sciences
2023

Beihang University
2023

Stomatological Hospital of Chongqing Medical University
2020-2023

The objectives of the DECi-hertz Interferometer Gravitational Wave Observatory (DECIGO) are to open a new window observation for gravitational wave astronomy and obtain insight into significant areas science, such as verifying characterizing inflation, determining thermal history universe, dark energy, describing formation mechanism supermassive black holes in center galaxies, testing alternative theories gravity, seeking hole matter, understanding physics neutron stars searching planets...

10.1088/0264-9381/28/9/094011 article EN Classical and Quantum Gravity 2011-04-19

DECi-hertz Interferometer Gravitational-wave Observatory (DECIGO) is a future Japanese space gravitational-wave antenna. The most important objective of DECIGO, among various sciences to be aimed at, detect gravitational waves coming from the inflation universe. DECIGO consists four clusters spacecraft, and each cluster three spacecraft with Fabry–Perot Michelson interferometers. As pathfinder mission B-DECIGO will launched, hopefully in 2020s, demonstrate technologies necessary for as well...

10.1142/s0218271818450013 article EN International Journal of Modern Physics D 2018-05-07

Major construction and initial-phase operation of a second-generation gravitational-wave detector KAGRA has been completed. The entire 3-km is installed underground in mine order to be isolated from background seismic vibrations on the surface. This allows us achieve good sensitivity at low frequencies high stability detector. Bare-bones equipment for interferometer first test run was accomplished March April 2016 with rather simple configuration. initial configuration named {\it iKAGRA}. In...

10.1093/ptep/ptx180 article EN cc-by Progress of Theoretical and Experimental Physics 2017-11-27

KAGRA is a gravitational-wave (GW) detector constructed in Japan with two unique key features: It was underground, and the test-mass mirrors are cooled to cryogenic temperatures. These features not included other kilometer-scale detectors but will be adopted future such as Einstein Telescope. performed its first joint observation run GEO600 2020. In this observation, sensitivity of GWs inferior that LIGO Virgo. However, further upgrades ongoing reach for detecting next run, which scheduled...

10.3390/galaxies10030063 article EN cc-by Galaxies 2022-04-26

This study investigated the mechanism of glycerol, xylitol, and sorbitol-mediated curing cured minced pork tenderloin. The use polyhydroxy alcohol during mediated significantly reduced salt content (p < 0.01) water activity (aw) Low-field nuclear magnetic resonance (LFNMR) revealed that 1 % sorbitol, 10 glycerol-mediated decreased mobility, improved holding capacity (WHC), produced uniform dense microstructures. Raman spectroscopy molecular docking indicated alcohols formed hydrogen bonds...

10.1016/j.fochx.2022.100401 article EN cc-by-nc-nd Food Chemistry X 2022-07-25

The Tibet-III air shower array, consisting of 533 scintillation detectors, has been operating successfully at Yangbajing in Tibet, China since 1999. Using the data set collected by this array from 1999 November through 2005 November, we obtained energy spectrum γ-rays Crab Nebula, expressed a power law as (dJ/dE) = (2.09 ± 0.32) × 10−12(E/3 TeV)−2.96±0.14 cm−2 s−1 TeV−1 range 1.7–40 TeV. This result is consistent with other independent γ-ray observations imaging Cherenkov telescopes. In...

10.1088/0004-637x/692/1/61 article EN The Astrophysical Journal 2009-02-10

Abstract Background Few studies have focused on the dimensional accuracy of customized bone grafting by means guided regeneration (GBR) with 3D‐Printed Individual Titanium Mesh (3D‐PITM). Purpose Digital technologies were applied to evaluate augmentation 3D‐PITM a two‐stage technique. Materials and methods Sixteen patients included in this study. The CBCT data post‐GBR (immediate post‐GBR) post‐implantation post‐implant placement) 3D reconstructed compared pre‐surgical planned augmentation....

10.1111/cid.12966 article EN Clinical Implant Dentistry and Related Research 2020-12-17

Abstract KAGRA, the kilometer-scale underground gravitational-wave detector, is located at Kamioka, Japan. In April 2020, an astrophysics observation was performed KAGRA detector in combination with GEO 600 detector; this operation called O3GK. The optical configuration O3GK based on a power-recycled Fabry–Pérot–Michelson interferometer; all mirrors were set room temperature. duty factor of approximately 53%, and displacement sensitivity 1 × 10−18 ${\rm m}/\sqrt{\rm {Hz}}$ 250 Hz....

10.1093/ptep/ptac093 article EN cc-by Progress of Theoretical and Experimental Physics 2022-06-28

Abstract We report the mirror suspension design for large-scale cryogenic gravitational wave telescope, KAGRA, during bKAGRA phase 1. Mirror thermal noise is one of fundamental noises room-temperature gravitational-wave detectors such as Advanced LIGO and Virgo. Thus, reduction required further improvement their sensitivity. One effective approach reducing to cool mirrors. There are many technical challenges that must be overcome mirrors, cryocooler induced vibrations, drift in suspensions,...

10.1088/1361-6382/abe9f3 article EN Classical and Quantum Gravity 2021-03-19

A model of the cosmic-ray energy spectrum is proposed that assumes various acceleration limits at multiple sources. The describes broken power-law cosmic rays by superposition sources; a diffusive shock mechanism plays an essential role. maximum galactic discussed based on comparison experimental data with calculations done using model. can describe very high energies up to several times 1018 eV, but observed highest-energy deviate from predictions, indicating different origin, such as...

10.1088/0004-637x/716/2/1076 article EN The Astrophysical Journal 2010-05-26

Background The clinical teaching of esthetic implant-supported restoration the atrophic maxilla is challenging due to complexity and unpredictability bone soft tissue augmentation. traditional problem-based learning case-based method (PBL-CBL method) with a full digital workflow (digital PBL-CBL provides students chance view cases in more accurate measurable way. aim evaluate effectiveness new complex implant area. Materials &amp; Methods A dental therapy was established for patients...

10.7717/peerj.16496 article EN cc-by PeerJ 2023-12-06

Currently, the Japanese gravitational wave laser interferometer KAGRA is under construction in Kamioka mine. As one main feature, it will employ sapphire mirrors operated at a temperature of 20 K to reduce impact from thermal noise. To seismic noise, also be suspended multi-stage pendulums. Thus heat load deposited by absorption circulating light as well radiation need extracted through last suspension stage. This stage consist four thin fibers with larger heads necessary connect both mirror...

10.1088/0264-9381/31/10/105004 article EN Classical and Quantum Gravity 2014-04-29

This paper reports on the optical properties, outgassing rate, and cryogenic performance of surface finishing we have adopted for large baffles absorbing stray light in KAGRA, an advanced interferometer detecting gravitational waves. The is based electroless nickel-phosphorus-tungsten (NiPW) plating, applicable to area up ~ 800 mm diameter, achieves less than 3% total reflectance against a beam at 1064 nm with reasonable scattering distribution 0.05/sr. rate from black coating meets our...

10.1364/ome.6.001613 article EN cc-by Optical Materials Express 2016-04-13

Intrauterine adhesion (IUA) is one of the most important causes female infertility, while iatrogenic endometrial injury main, but not entire, cause IUA. The microorganisms reproductive tract play an role in its health and disease. imbalance immune regulation caused by dysbacteriosis may be link formation mechanism uterine cavity adhesion.We prospectively enrolled 30 patients diagnosed with IUA women a history intrauterine surgery, without IUA, as control subjects. All participants were...

10.21037/atm.2019.11.124 article EN Annals of Translational Medicine 2020-02-01

KAGRA is a project to construct cryogenic interferometric gravitational wave detector in Japan. Its mirrors and the lower parts of suspension systems will be cooled 20 K order reduce thermal noise, one fundamental noise sources. One key features KAGRAʼs cooling system that it keep without introducing vibration. This paper describes current status design, manufacture testing system.

10.1088/0264-9381/31/22/224003 article EN Classical and Quantum Gravity 2014-11-04

Tea market is currently oversupplied, and unsold tea often needs to be properly stored for a period of time. However, the chemical changes occurring in black during storage are limitedly understood. In this study, comprehensive nontargeted targeted metabolomics approach was used investigate dynamic compounds time-series (0-19 months)-stored teas. The contents flavanols, theaflavins (TFs), theasinensins, procyanidins, most phenolic acids, amino quercetin-O-glycosides, myricetin-O-glycosides...

10.1021/acs.jafc.1c05850 article EN Journal of Agricultural and Food Chemistry 2021-11-15

Using the Tibet-III air shower array, we search for TeV γ-rays from 27 potential Galactic sources in early list of bright obtained by Fermi Large Area Telescope at energies above 100 MeV. Among them, observe seven instead expected 0.61 a significance 2σ or more excess. The chance probability Poisson statistics would be estimated to 3.8 × 10−6. If excess distribution observed array has density gradient toward plane, number may enhanced association. Then, rises slightly, 1.2 10−5, based on...

10.1088/2041-8205/709/1/l6 article EN The Astrophysical Journal Letters 2009-12-29

KAGRA is the cryogenic interferometric gravitational wave telescope designed for direct detection of waves from astronomical sources. To achieve best sensitivity, one most difficult challenges cooling mirrors to 20K reduce thermal noise. We developed four cryostats and sixteen very-low-vibration cryocooler units accomplish our purpose. In this paper, we describe outline design fabrication, results performance test units.

10.1063/1.4860850 article EN AIP conference proceedings 2014-01-01

This study focused on how different concentrations of tea branch liquid smoke (TLS) in the curing solution impacted physicochemical properties and antioxidant pork tenderloin. Five experimental (1.25 mL/kg, 2.5 5 10 20 mL/kg) blank groups set up over 4 days, it was found that indexes, capacity, thermal stability protein network structure cured meat using mL/kg were excellent than other used (P < 0.05). However, at accelerated oxidation. Low frequency nuclear magnetic resonance (LFNHR)...

10.1016/j.fochx.2022.100544 article EN cc-by-nc-nd Food Chemistry X 2022-12-13

The advanced space-based solar observatory (ASO-S) is the first Chinese mission which scheduled to be launched in end of 2021. It designed study magnetic field, coronal mass ejections flares as well their relationships. ASO-S includes three scientific payloads, Full-disk vector MagnetoGraph (FMG), Lyman-alpha Solar Telescope (LST) and Hard X-ray Imager (HXI). As a key part on ASO-S, HXI will improve our understanding during 25th maximum. composed instruments, collimator (HXI-C), spectrometer...

10.1088/1748-0221/15/10/t10008 article EN Journal of Instrumentation 2020-10-27

KAGRA is a large scale cryogenic gravitational wave telescope currently under construction in Japan. The detector located 200 m underground the Kamioka mine and will employ technologies to achieve high sensitivity. mirrors of interferometer be form multiple pendulums final stages sapphire suspension system operating at 20 Kelvin. In this paper we report ongoing activities payload group involved design fabrication for

10.1088/1742-6596/716/1/012017 article EN Journal of Physics Conference Series 2016-05-01
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