A5101761500- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Semiconductor materials and devices
- Analytical Chemistry and Sensors
- Semiconductor Lasers and Optical Devices
- Advanced Chemical Sensor Technologies
- Conducting polymers and applications
- Technology Assessment and Management
- Statistical Methods in Clinical Trials
- Pharmacovigilance and Adverse Drug Reactions
- Cell Image Analysis Techniques
- Metal and Thin Film Mechanics
- Dielectric materials and actuators
- Gas Sensing Nanomaterials and Sensors
- Transition Metal Oxide Nanomaterials
- 3D Printing in Biomedical Research
- Laser-Plasma Interactions and Diagnostics
- High voltage insulation and dielectric phenomena
- Characterization and Applications of Magnetic Nanoparticles
- Advanced Measurement and Metrology Techniques
- Advanced Neural Network Applications
- ZnO doping and properties
- Energetic Materials and Combustion
- Infrared Target Detection Methodologies
Harbin Engineering University
2022-2024
China Academy of Space Technology
2020
Lingnan Normal University
2010-2016
Fiberhome Technology Group (China)
2008
We present and demonstrate a method based on periodic phase noise estimation in an optical frequency domain reflectometry (OFDR) capable of beyond 107 range-resolution-1 product (RRP) for the first time, which corresponds to 2.5 × improvement compared with state-of-the-art. The moving average filter is employed suppress amplification derivation process. Further, help third-order Taylor expansion, this provides highly precise noise, main factor impacting performance OFDR systems...
What we believe to be a new hybrid-polarization diversity scheme which can eliminate the polarization state variation caused by wavelength tuning of laser in optical frequency domain reflectometry is proposed paper. In scheme, 45° polarizer used maintain signals. It decreases angle fluctuation 2.81° and realizes −145 dB test sensitivity with 32 Rayleigh scattering signal-to-noise ratio 10 m fiber single test. The fading suppression achieved for tests large range from 1480 nm 1640 nm....
Abstract We report reproducible bipolar resistive memory devices based on Au/ZnO nanowire networks (ZnO NWNs)/ITO, which show a high R / off ratio (∼10 4 ) and narrow dispersion of set reset threshold voltages. The dominant conduction mechanisms low resistance state were verified by Ohmic behavior space charge limited current, respectively. switching mechanism is confirmed in terms the formation rupture conductive filaments, with oxygen vacancies localized ZnO NWNs surface involved in....
We propose a common-path interferometer (CPI) method to suppress the ambient and laser phase noise in frequency sweeping interferometry. The CPI realizes multiplexing of main auxiliary ensure common-mode characteristic interference noise, which can be eliminated by signal mixing. In experiments, we obtain dynamic range up 110 dB. Compared with compensation using separated interferometer, improves 10 dB is immune noise. proposed enables high-precision distributed polarization measurements...
We propose an envelope detrending method to correct parasitic amplitude modulation (AM) in frequency sweeping interferometry (FSI). Parasitic AM arises from effects such as device spectral response and residual of laser. The periodic component introduces spurious harmonics, which degrade the spurious-free dynamic range (SFDR) interfere with information analysis. proposed employs a Hilbert transform obtain time-varying fluctuation curve auxiliary interferometer. This is then employed detrend...
Traditional polymer capacitors used for pulsed power and electronics applications have severe limitations in terms of portability high temperature reliability. Alkali-free glass is a promising material because its low dielectric loss breakdown strength (10 MV/cm), resulting energy density values higher than 35 J/cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> . Thin sheet production has grown substantially the strong demand from flat...
AbstractPharmacovigilance signal detection algorithms commonly involve the calculation of observed/expected (O/E) reporting frequencies, ratios, or odds calculated from 2×2 contingency tables. Frequentist and Bayesian implementations each have strengths limitations. No single approach has emerged as universally superior. P-plots are a graphically oriented, frequentist statistical methodology based on distributional properties p-values random variables under null versus alternative...
This study addresses the critical need for high signal-to-noise ratio in optical detection methods biological sample discrimination under low-photon-flux conditions to ensure accuracy without compromising integrity. We explore polarization-based probing, which often excels over intensity modulation when assessing a specimen's morphology. Leveraging non-classical light sources, our approach capitalizes on sub-Poissonian photon statistics and quantum correlation-based measurements. present...
Optical frequency domain reflectometry (OFDR) can provide a powerful tool for fiber components and devices diagnosis characterization. However, apart from laser source phase noise, the impact of chromatic dispersion effect on system is severely increased with measurement length tunable range. We propose distributed compensation method device under test (DUT) complex structures containing different dispersive media connections in OFDR. Based mismatch factor (which related to difference...
This paper proposes a distributed birefringence measurement method for long-distance polarization maintaining fiber (PMF) based on optical frequency domain reflectometry (P-OFDR). Distinguished from the existing ways, characterizes by internal strain of PMF, and cuts off dependence measurements wavelength interrogated laser. It obtains through cross-correlation Rayleigh backscattering (RBS) spectra two orthogonal axes polarization. The measured is converted to according parameters PMF. In...
Alkali-free flat panel display glass is produced in large quantity and has excellent electrical insulating properties at high temperature. Aluminum borosilicate with alkaline-earth modifier low sodium content dielectric loss (tan δ &lt;0.1 250°C), breakdown strength (109 V/m) temperature stability. In addition, roll-to-roll processing of thin sheet been demonstrated capacitors that are configured a coil. Excellent power capability these glasses was confirmed by analytical, finite...
Solar array is a power source of spacecraft, which often damaged by the impact micrometeoroids and space debris, resulting in decrease output solar array. The degradation law volt-ampere characteristic for spacecraft arrays under orbital debris hypervelocity investigated using two-stage light gas gun. characteristics different velocities, projectile diameters positions are studied. A total 12 shots carried out, 5 invalid due to carrier on specimen, 7 valid. experimental results show that...
Currently, with the widespread use of UAVs in various fields, there is a significant challenge detecting aerial targets using drones. The YOLO series object detection has made advancements both speed and accuracy. However, many state-of-the-art methods are not suitable for drone images due to unique perspective large number small targets. Increasing layer or input picture size can improve accuracy, but this also increases computational cost reduces speed. This paper proposes YOLOQ detection,...
This paper goal is to provide a framework for the remote configuration and management of services PON (Passive Optical Network) access fiber access. Also it defines how Auto-Configuration Servers (ACS) in network can remotely configure, troubleshoot manage Passive Network (PON) optical termination (ONT) with layer 3 capabilities using CPE WAN protocol, TR-069.
Abstract As an important part of spacecraft, the research on general exclusive parts for spacecraft integration is still in its infancy. In this paper, based characteristic and parts, development mode principles configuration management are established. This paper explores working adding, modification, abolition deviation. Furthermore, also suggests thoughts construction relevant databases.
Perovskite light-emitting diodes (PeLEDs) have emerged as a strong contender for next-generation display and information technologies. However, similar to perovskite solar cells, the poor operational stability remains main obstacle toward commercial applications. Here we demonstrate ultra-stable efficient PeLEDs with extraordinary lifetimes (T50) of 1.0x10^4 h, 2.8x10^4 5.4x10^5 1.9x10^6 h at initial radiance (or current densities) 3.7 W/sr/m2 (~5 mA/cm2), 2.1 (~3.2 0.42 (~1.1 0.21 (~0.7...