A5100718014- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Semiconductor Lasers and Optical Devices
- Advanced Optical Sensing Technologies
- Rock Mechanics and Modeling
- Financial Risk and Volatility Modeling
- Geomechanics and Mining Engineering
- Elevator Systems and Control
- Geoscience and Mining Technology
- Ophthalmology and Visual Impairment Studies
- Corneal surgery and disorders
- Industrial Automation and Control Systems
- Complex Systems and Time Series Analysis
- Glaucoma and retinal disorders
- Belt Conveyor Systems Engineering
- Magneto-Optical Properties and Applications
- Insurance and Financial Risk Management
- Forecasting Techniques and Applications
- Stock Market Forecasting Methods
- Statistical Methods and Inference
- Neural Networks and Applications
- Structural Health Monitoring Techniques
- Advanced Causal Inference Techniques
- Optical Coherence Tomography Applications
Chinese University of Hong Kong
2024-2025
Hong Kong Polytechnic University
2021-2024
Liaocheng University
2024
China University of Mining and Technology
2019-2024
Anhui University of Finance and Economics
2024
University of California, San Diego
2024
Chinese People's Liberation Army
2023
Hunan University
2023
Chinese General Hospital College of Nursing and Liberal Arts
2023
Chinese People’s Liberation Army 263 hospital
2023
In this paper, we propose and experimentally demonstrate a scheme of deep learning enhanced long-range fast Brillouin optical time-domain analysis (BOTDA). The volumetric data from BOTDA is denoised demodulated by using video denoising network neural network, respectively. Benefitting the advanced algorithms, sensing range extended to 10 km successfully. experiment, vibration signal measured with sampling rate 23 Hz, 2 m spatial resolution, 1.19 MHz accuracy over single-mode fiber only 4...
Abstract To identify novel genetic loci for children refractive error, we performed a meta-analysis of two genome-wide association studies (GWASs) spherical equivalent (SE) in 1,237 from the population-based Hong Kong Children Eye Study (HKCES) and Low Concentration Atropine Myopia Progression (LAMP) study. Replication was conducted 4,093 Chinese 1,814 adults. Four lead-SNPs ( MIR4275 rs292034, TENM3 rs17074027, LOC101928911 rs6925312 FAM135B rs4609227) showed significant P ≤ 5.0 × 10 −8 )...
The mining of extra-thick coal seams features severe deformation the stoping roadway and section pillars due to large thickness intense movement overlying strata. adjacent goaf secondary disturbance in current working face further challenge control. This study explores effect strata structural evolution fully mechanized caving seam on failure pillars. Physical analog modeling was carried out. A MatchID non-contact full-field displacement- strain-measuring system used determine evolutionary...
Aims To investigate the associations of genetic variants previously linked to axial length (AL) and spherical equivalent refraction (SE) in adults with refractive error related endophenotypes children, at baseline 3-year follow-up. Methods 15 candidate single-nucleotide polymorphisms (SNPs), selected from previous Genome-Wide Association Studies meta-analyses, were genotyped 2819 Chinese who had undergone follow-up cycloplegic refraction, ocular biometry health examinations. Linear...
Summary In prevalent cohort studies with follow-up, the time-to-event outcome is subject to left truncation leading selection bias. For estimation of distribution time event, conventional methods adjusting for tend rely on quasi-independence assumption that and event are independent observed region. This violated when there dependence between time, possibly induced by measured covariates. Inverse probability weighting can be used in this case, but it sensitive misspecification model. work,...
In this paper, a high-sensitivity distributed optical fiber salinity sensor based on frequency-scanning phase-sensitive time-domain reflectometry (φ-OTDR) and polyimide-coated single-mode is proposed. Distributed sensing over an 1100 m with 1 spatial resolution was demonstrated, sensitivity of 782.4 MHz/(mol/L) achieved the changing from 0 mol/L to 1.61 mol/L. Then measurement accuracies frequency shift were evaluated theoretically experimentally. Both theoretical experimental results show...
In this paper, a white light interferometer-based distributed polarization coupling system is developed for measuring the frequency of dynamic stress in two ways. First, movable mirror Michelson interferometer (MI) scans point to obtain its interferogram. The Hilbert transform and fast Fourier (FFT) are then used extract envelope interferogram spectrum envelope, respectively. This first method achieved single double measurements with an absolute error less than 0.47 Hz. Second, MI adjusted...
Rayleigh scattering-based distributed optical fiber sensors with long sensing distance and large dynamic range are highly desired for application scenarios such as vehicle tracking, structure health monitoring, geological survey. To enlarge the range, we propose a coherent time domain reflectometry (COTDR) based on double-sideband linear frequency modulation (LFM) pulse. By utilizing I/Q demodulation, both positive negative band of backscattering (RBS) signal can be properly demodulated....
This paper proposes a realized EGARCH model with dynamic jumps (REGARCH-Jump) incorporating high-frequency information and time-varying jump intensity to forecast VIX. We derive the risk-neutral of REGARCH-Jump as well corresponding model-implied VIX formula. Our empirical results show that outperforms range competing models in terms forecasting performance.
In this Letter, we propose and experimentally demonstrate a highly sensitive distributed dynamic pressure sensor based on dual-linear frequency modulated optical domain reflectometry (OFDR) coating thickness-enhanced single-mode fiber (SMF). A dual-sideband linear modulation (LFM) signal is used to interrogate the sensing fiber, which allows us obtain Rayleigh backscattering signal. Due opposite slopes of two LFM sidebands, spectra sidebands drift in directions when disturbed. By subtracting...
We propose and experimentally demonstrate an enhanced quasi-distributed accelerometer array based on phase-sensitive optical time-domain reflectometry ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\phi $ </tex-math></inline-formula> -OTDR) ultraweak fiber Bragg grating (UWFBG). By utilizing a transducer cylinder, the vibration can be easily converted to axial strain of sensing fiber, which enables high...
Tobacco dust represents a critical threat to the operators’ respiratory health. Even when wet scrubbers display high purification efficiencies and strong adaptability dust, their potential applications in tobacco industry have not been studied. In present research, removal efficiency of scrubber for fine were examined at laboratory industrial level. Results showed that under conditions reached maximum value 99.17%. addition, discharge concentration was reduced minimum 1.1 mg/m3. Our data...
With orthogonal codes on the same carrier as probing signal, scan-rate of quasi-distributed acoustic sensing system is enlarged by 20 times, with 10 kHz bandwidth 99.4 km fiber.
Up to now, the distributed polarization coupling (DPC) measurement system based on white light interferometry (WLI) has been mainly studied for static and quasi-static measurement. In this paper, we developed DPC measure instantaneous frequency of dynamic stress. First, set up a model transversal stress panda maintaining fiber (PMF) simulated interferograms points when PMF is subjected cosine wave, sawtooth wave square wave. Then, did groups experiments points, including cosinoidal point,...