A5101404718- Spectroscopy and Laser Applications
- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Analytical Chemistry and Sensors
- Water Quality Monitoring and Analysis
- Advanced Chemical Sensor Technologies
- Laser Design and Applications
- Photonic and Optical Devices
- Medical Imaging and Analysis
- Radiomics and Machine Learning in Medical Imaging
- Solid State Laser Technologies
- Gas Sensing Nanomaterials and Sensors
- Air Quality Monitoring and Forecasting
- Advanced Neural Network Applications
- Combustion and flame dynamics
- Prenatal Screening and Diagnostics
- Advancements in Semiconductor Devices and Circuit Design
- Isotope Analysis in Ecology
- Mechanical Engineering and Vibrations Research
- Advanced Combustion Engine Technologies
- Hydrocarbon exploration and reservoir analysis
- DNA Repair Mechanisms
- Mental Health Treatment and Access
- Mechanical Failure Analysis and Simulation
- Atmospheric chemistry and aerosols
Anhui University
2021-2024
Huawei Technologies (China)
2024
Tianjin Anding Hospital
2022
Tianjin Medical University
2022
Henan University of Technology
2021
Chinese Academy of Sciences
2011-2020
Anhui Institute of Optics and Fine Mechanics
2008-2020
Institute of Hydrobiology
2016
Laboratoire de Physico-Chimie de l'Atmosphère
2011-2016
Université du littoral côte d'opale
2013
We report the first application of gas total emission using a DFB diode laser for concentration measurements combined with two LEDs velocity measurements. In situ emissions and particle density in an industrial pipeline simultaneous tunable absorption spectroscopy (TDLAS) optical scintillation cross-correlation technique (OSCC) are presented. Velocity mean values obtained 7.59 m/s (OSCC, standard deviation is 1.37 m/s) 8.20 (Pitot tube, 1.47 steel plant comparison. Our experiments...
Abstract DMC1 is a recombinase that essential for meiotic synapsis. Experiments in extensive species of eukaryotes have indicated the independent role repairing double strand breaks (DSBs) produced during meiosis I. Mutation dmc1 mice and human often leads to obstacles spermatogenesis male sterility. Here, we report on disruption medaka ( Oryzias latipes ). Synapsis was disturbed mutant testis nuclei, as observed other organisms. Unexpectedly, could produce few sperm and, although most these...
A room-temperature continuous-wave (CW) quantum cascade laser (QCL)-based methane (CH4) sensor operating in the mid-infrared near 8 μm was developed for continuous measurement of CH4 concentrations ambient air. The well-isolated absorption line (7F2,4 ← 8F1,2) ν4 fundamental band located at 1255.0004 cm−1 used optical concentration by direct a White-type multipass cell with an effective path-length 175 m. 1σ (SNR = 1) detection limit 33.3 ppb 218 s achieved precision 1.13%. deployed campaign...
Sensitive detection of hydrogen sulfide (H2S) has been performed by means wavelength modulation spectroscopy (WMS) near 1.578 μm. With the scan amplitude and stability background baseline taken into account, response time is 4 s for a 0.8 L multi-pass cell with 56.7 m effective optical path length. Moreover, linearity tested in 0–50 ppmv range. The limit achievable Allan variance 224 ppb within 24 under room temperature ambient pressure conditions. This tunable diode laser absorption (TDLAS)...
The development of a fast in situ optical sensor based on continuous-wave quantum cascade laser operating at 8 μm for the measurement environmental gaseous nitrous acid (HONO) is reported. A strong absorption line 1252.2109 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> found to be free interferences and used first time ambient HONO detection. Loss wall gas sample cell evaluated. resulting 1-s detection limit 110 pptv with folded...
Abstract We report the application of an infrared dual‐wavelength laser absorption spectroscopy system, which combines tunable diode and wavelength modulation integrated cavity output technologies based on two spectroscopic sources operating at 6,029 2,310 cm −1 , to simultaneously measure gas concentrations (CH 4 CO 2 ) carbon isotopic signatures ( 13 C 12 C) in coalbed methane. The Allan variance is used analyze optimum mean time t standard deviation SD ), with = 450 s, 0.41‰ for CH...
A compact spectrometer based on a mid-infrared optical sensor has been developed for high-precision and real-time measurement of water isotope ratios. The instrument uses laser absorption spectroscopy applies the weighted Kalman filtering method to determine ratios with high precision fast time response. measurements is 0.41‰ δ18O 0.29‰ δ17O 1 s time. This much faster than standard running average technique, which takes over 90 achieve same level precision. successful development this opens...
A compact isotope ratio sensor based on laser absorption spectroscopy at 2.7 μm was developed for high precision and simultaneous measurements of the D/H, 18O/16O 17O/16O ratios in glacier water. Measurements oxygen hydrogen water demonstrate a 1σ 0.3‰ δ18O, 0.2‰ δ17O, 0.5‰ δ2H, respectively. The δ values working standard obtained by calibrated system is basically identical to IRMS measurement results with very calibration accuracy from 0.17‰ 0.75‰. Preliminary reproducibility display...
Photo-acoustic spectroscopy gas detection technology has the advantages of high sensitivity, good selectivity, small size and real time monitoring been widely used in environmental monitoring, industrial production, medical diagnosis, biological power facilities. In this paper, a method to improve sensitivity photo-acoustic system is presented, which combined with technique Herriott type multiple pass cell. experimental apparatus, design device can make beam cell 18 times. By comparing...
Spatial temperature and gas concentration distributions are crucial for combustion studies to characterize the position evaluate regime released heat quantity. Optical computer tomography (CT) enables reconstruction of fields in a flame on basis line-of-sight tunable diode laser absorption spectroscopy (LOS-TDLAS). A pair H2O lines at wavelengths 1395.51 1395.69 nm is selected. Temperature flat furnace calculated by superimposing two peaks with discrete algebraic iterative algorithm...
Direct absorption spectroscopy for gas temperature monitoring in a tube furnace is proposed over the range 300–900 K with intervals of 100 K. This detecting technique based on relationship between two lines' strength and temperature. The can be inferred from ratio integrated spectral area oxygen features measured distributed feedback diode laser near 760 nm. Compared thermocouple results, direct approach also provides temporal resolution. results show that accuracy better at low temperatures...
Imaging registration has a significant contribution to guide and support physicians in the process of decision-making for diagnosis, prognosis, treatment. However, existing methods based on convolutional neural network cannot extract global features effectively, which significantly influences performance. Moreover, smoothness displacement vector field (DVF) fails be ensured due miss folding penalty.In order capture abundant information as well local information, we have proposed novel 3D...
Background Although evidence-based and effective treatments are available for people with major depressive disorder (MDD), a substantial number do not seek or receive help. Therefore, this study aimed to (1) investigate the total help-seeking rate first-time choices; (2) explore perceived helpfulness of 23 potential sources; (3) evaluate factors related behaviors among patients MDD. Materials Methods Data came from Tianjin Mental Health Survey (TJMHS), which included representative sample...