A5010546365- Photonic and Optical Devices
- Pulsars and Gravitational Waves Research
- Photonic Crystals and Applications
- Semiconductor Lasers and Optical Devices
- Advanced Fiber Optic Sensors
- Advanced Photonic Communication Systems
- Synthesis and biological activity
- Geotechnical Engineering and Analysis
- High-pressure geophysics and materials
- Drilling and Well Engineering
- Multicomponent Synthesis of Heterocycles
- Mineral Processing and Grinding
- Quinazolinone synthesis and applications
- Magnolia and Illicium research
- Educational Reforms and Innovations
- Radio Astronomy Observations and Technology
- Solid State Laser Technologies
- Grouting, Rheology, and Soil Mechanics
- Silicon Nanostructures and Photoluminescence
- Advanced machining processes and optimization
- Geophysics and Gravity Measurements
- Plant-derived Lignans Synthesis and Bioactivity
- Advanced Fiber Laser Technologies
- Electrocatalysts for Energy Conversion
- Optical Network Technologies
Sichuan University
2019-2024
West China Hospital of Sichuan University
2019-2024
Sanming University
2017-2021
Jingdong (China)
2021
Affiliated Zhongshan Hospital of Dalian University
2021
Yantaishan Hospital
2021
Sichuan Cancer Hospital
2017-2019
University of Electronic Science and Technology of China
2017-2019
Dartmouth College
2012-2017
Nanjing Institute of Technology
2013-2017
A Si-based monolithic laser is strongly desired for the full integration of Si-photonics. Lasing from direct bandgap group-IV GeSn alloy has opened a new avenue, different hybrid III–V-on-Si approach. We demonstrated optically pumped lasers on Si with broad wavelength coverage 2 to 3 μm. The alloys were grown using newly developed approaches an industry standard chemical vapor deposition reactor and low-cost commercially available precursors. achieved maximum Sn composition 17.5% exceeded...
Acidic dissolution of transition metals from Pt based alloy catalysts for oxygen reduction reaction (ORR) is an unavoidable process during fuel cell operation. In this work we studied the effect acid treatment graphene-supported Pt1Nix(x = 0, 0.25, 0.5, 1, and 2) alloys on kinetics ORR in both alkaline acidic solutions together with generation OH radicals solutions. The nanoparticles were synthesized through coimpregnation chemical reduction. electronic structural features characterized by...
Selective solar thermal absorber coating is an important component of concentrated power systems. It maximizes the absorption spectrum and minimizes radiation losses in mid-infrared regime. In this letter, we demonstrate a solution-processed plasmonic Ni nanochain-Al2O3 selective with high absorptance >90% low emittance loss <10%. Unlike conventional graded-index cermet coatings, spectral selectivity tailored by lengths nanochains, elimating requirement costly vacuum deposition...
Frequency-dependent polarization properties provide crucial insights into the radiation mechanisms and magnetic environments of fast radio bursts (FRBs). We explore an analytical solution radiative transfer FRBs as a strong incoming wave propagates in homogeneous magnetized plasma. The case thermal plasma is studied more detail. rotational axis spectrum undergoes precession with frequency on Poincar\'e sphere when medium has both Faraday rotation conversion. Such could occur hot or cold...
The recent demonstration of Ge-on-Si diode lasers renews the interest in unique carrier dynamics Ge involving both direct (Γ) and indirect (L) valleys. Here, we report a large inherent gap optical gain ≥1300 cm−1 at room temperature from tensile-strained n+ films intrinsic Ge-on-insulator using femtosecond transmittance spectroscopy captured before direct-to-indirect valley scattering. This is comparable to III-V semiconductors. For Ge, this transient ∼25× larger than its steady state gain,...
The statistical properties of the ultra-luminous X-ray source (ULX) populations extracted from ROSAT HRI survey point sources in nearby galaxies Paper I are studied to reveal connections between ULX phenomenon and galaxy properties. $logN$--$logS$ relation is used calculate remove influence false ULXs background and/or foreground objects. Study luminosity functions shows that regular below $10^{40}$ erg/sec an extension ordinary HMXB/LMXB population $10^{39}$ late-type galaxies, extreme...
Abstract Two new lignans, dihydrodehydrodiconiferyl alcohol 9‐ O ‐ β D ‐(3″‐ ‐acetyl)‐xylopyranoside ( 1 ) and threo ‐4,9,9′‐trihydroxy‐3,3′‐dimethoxy‐8‐ ‐4′‐neolignan 7‐ α ‐rhamnopyranoside 2 were isolated from Illicium henryi , together with ten known compounds, 3 – 12 . Their structures elucidated by extensive spectroscopic analyses. The anti‐hepatitis B virus (anti‐HBV) activity of compounds inhibiting HBV surface antigen (HBsAg) e (HBeAg) secretion on Hep G2.2.15 cell line was...
This study reports the subjective perceptions and mental state of employees working in Erdaogou Mine, affiliated with Jiapigou Minerals Limited Corporation China National Gold Group (CJEM); these are pioneers at deepest point below ground China. The data represent a valuable baseline from which to assess effects environmental factors deep-underground on human physiology, psychology, pathology.The air pressure, relative humidity, temperature, total γ radiation dose-rate, oxygen concentration...
In order to reveal the water‐induced damage mechanism and mechanical properties of red‐layers in Southern China, typical red‐layer samples are experimentally studied by scanning electron microscope (SEM), energy spectrum analysis, XRD, tests. The results show that some contain a large number smectite illite‐smectite mixed‐layer clay minerals their microstructures mainly stacked microaggregates which mutual agglomeration is formed flake tabular particles. Widespread distribution micropores...
We report a waveguide-integrated, gigahertz GeSi electroabsorption modulator on SOI with 10 dB extinction ratio at 1540 nm, ultralow energy consumption of 50 fJ/bit, and an operation spectrum range 1539-1553 nm.
We demonstrate pseudo single crystal, direct-band-gap Ge0.89Sn0.11 crystallized on amorphous layers at <450 °C towards 3D Si photonic integration. developed two approaches to seed the lateral crystal growth: (1) utilize Gibbs-Thomson eutectic temperature depression tip of an GeSn nanotaper for selective nucleation; (2) laser-induced nucleation one end a strip. Either way, is dominated by grain >18 μm long that forms optoelectronically benign twin boundaries with others grains....
In order to reveal water content influence on shear strength, swelling, and creep properties of red-layers in Guangzhou Metro, Southern China, the typical rock soil specimens were experimentally studied by direct test, UU triaxial swelling measured data analyzed. The results showed that internal friction angle exponentially decreased with increase cohesion accordance Gaussian function firstly increased then content. Expansion rate significantly initial increase. red sandstone had very strong...
Aiming at the issue that application effect of current 3-D hydrocarbon migration and accumulation modeling technique cannot meet actual requirement because over-simplified geologic model, a dynamic model using PEBI grid in bedding columnar shape was established, which can be used to solve heterogeneity reservoirs various sedimentary facies, reduce mixed lithologies on accuracy. A numerical based finite volume method including construction variable flow equation, decomposition calculation...
A multi-level partial blocks excitation system was proposed to meet the special requirement of vibration equipment. The dynamic mechanical model analyzed using Lagrange equations obtain angular displacement higher level block. instantaneous intensity and amplitude were also found. simulation test performed MATLAB in order motion curves, phase-trajectory Poincare maps Due fact that existence initial sensitivity, nonrepeatability complexity phase trajectory, flake points set many discrete...
The method,high vibrating intensity double masses vibration super-fine grinding,is used to study the effect of nonlinear on thinning granularity ground material.The main system adopts variable pitch spring,and its stiffness is a which varies with dynamic load,i.e.vibration intensity,so as fit in needs frequency speed control and close resonance system,thereby attaining aim stable work,energy conservation high efficiency system.Annular rubber spring adopted reducing system.The elasticity...
We analytically derive the energy-bandwidth limit for electro-optic modulators based on intra-cavity index modulation, and propose a dual cavity modulator using coupling modulation to simultaneously achieve high bandwidth (80 GHz) ultra-low energy-per-bit (0.26 aJ).
Computer simulation is a promising approach to better understand the crowd psychological dynamics. The lack of real data in simulations, however, usually results heavy dependence on assumptions, and thus hampers confidence. This paper presents our work crowds under confrontation stimuli. focuses aspect introduces intervention between two different relationship spaces crowd. Firstly, with agent-based approach, psychometrics employed construction individual model improve trustworthiness....
BackgroundThe prognostic effects of different treatment modalities on patients with hypopharyngeal squamous cell carcinoma (HPSCC) remain unclear.MethodsHPSCC diagnosed and treated at either West China Hospital or Sichuan Cancer between January 1, 2009, December 31, 2019, were enrolled in this retrospective, real-world study. Survival rates presented using Kaplan–Meier curves compared log-rank tests. Univariable multivariable Cox proportional hazards regression models used to identify the...
Using the experimental p\ifmmode\bar\else\textasciimacron\fi{}N amplitude and multiple scattering theory, we obtained antiproton optical potential at incident energies from 180 to 1800 MeV with impulse approximation. It is found that imaginary parts of strengths are nearly constant between 130 140 MeV. The elastic data on $^{12}\mathrm{C}$, $^{16}\mathrm{O}$, $^{40}\mathrm{Ca}$, $^{208}\mathrm{Pb}$ inelastic $^{12}\mathrm{C}$ analyzed within framework eikonal collective excitations...
Silicon-Germanium saturable absorber mirrors are developed for laser mode locking. The fabrication process is fashioned such that a highly reflecting Si/SiO 2 Bragg mirror with crystalline top-layer generated. One step of wafer- bonding allows subsequent epitaxial growth on the mirror. A six-pair reflector centered at 1400 nm 99.8% peak reflectivity, 99%-reflectivity bandwidth 700 and surface roughness 0.136 demonstrated. thin Germanium layer epitaxially deposited to provide absorption...