A5068381476- Soil Moisture and Remote Sensing
- GNSS positioning and interference
- Precipitation Measurement and Analysis
- Geophysics and Gravity Measurements
- Ocean Waves and Remote Sensing
- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Atmospheric Ozone and Climate
- Air Quality and Health Impacts
- Advanced Computational Techniques and Applications
- Oceanographic and Atmospheric Processes
- Traffic Prediction and Management Techniques
- Wind and Air Flow Studies
- Advanced Decision-Making Techniques
- Climate variability and models
- Bacteriophages and microbial interactions
- Hydraulic and Pneumatic Systems
- Evaluation and Optimization Models
- Atmospheric and Environmental Gas Dynamics
- Simulation and Modeling Applications
- Microbial infections and disease research
- Cryospheric studies and observations
- Advanced Sensor Technologies Research
- Capital Investment and Risk Analysis
Tianjin University
2024-2025
First Affiliated Hospital of Xi'an Jiaotong University
2023
Wuhan University
2018-2022
Beijing University of Technology
2015-2020
Beijing Satellite Navigation Center
2019
Tsinghua University
2018
Yunnan Investment Group (China)
2012
Hohai University
2010
On 20 July 2021, parts of China’s Henan Province received the highest precipitation levels ever recorded in region. Floods caused by heavy rainfall resulted hundreds casualties and tens billions dollars’ worth property loss. Due to highly dynamic nature flood disasters, rapid timely spatial monitoring is conducive for early disaster prevention, mid-term relief, post-disaster reconstruction. However, existing remote sensing satellites cannot provide high-resolution results. Seeing as...
To understand the impacts of different combinations planetary boundary layer (PBL), short-wave (SW) and long-wave (LW) radiation schemes on simulation results meteorological variables PM2.5 concentrations under extremely heavy pollution conditions, Weather Research Forecasting model with Chemistry (WRF-Chem) was applied in Beijing to investigate a high episode that occurred January, 2013. Four PBL schemes, two SW three LW total 12 ensemble experiments were conducted this study. The simulated...
With the evolution of Global Navigation Satellite System (GNSS), more GNSS satellites and civilian signals are available for Reflectometry (GNSS-R). Developments new onboard processing strategies can improve observation performance spaceborne GNSS-R. To this end, article proposes a method by coherently combining reflected Positioning (GPS) III L1 C/A L1C signals. By exploiting additional signal component, signal-to-noise ratio be significantly improved. Moreover, taking advantage narrower...
This study presents a new retrieval approach for obtaining wind speeds from CyGNSS level-1 observables. Unlike other existing approaches, (1) this one is variational technique that based on physical forward model, (2) it uses uncalibrated bin raw counts observables, (3) the geophysical information content comes only pixel of broader delay-Doppler map, finest achievable resolution in products over sea, and (4) calibrates them against track-wise polynomial adjustments to background numerical...
The fully coupled online air quality model WRF/chem was used to investigate the aerosol-radiation interaction and aerosol-cloud on regional meteorological factors over China in 2006.The of aerosols influence various worst aerosol-polluted regions China. Domain-wide monthly-mean all day night hours incoming solar radiation decreased by –11.03 W/m2, –9.84 –5.84 W/m2 –12.37 W/m2; temperature at 2 meters (T2) –0.22°C, –0.12°C, –0.06°C –0.24°C; Planetary boundary layer (PBL) height –16.44 m,...
Anthrax is caused by Bacillus anthracis. Humans are mainly infected through contact with the fur and meat of livestock. The cutaneous form most common form. skin lesions typical anthrax characterized shallow ulcers black crusts, surrounded small blisters nonpitting edema nearby tissues. Metagenomic next-generation sequencing (mNGS) a new pathogenic detection method which rapid unbiased. We reported first case diagnosed mNGS. Ultimately, man received prompt antibiotic therapy had good...
Accurate global soil moisture (SM) data are crucial for modeling land surface hydrological cycles and monitoring climate change. Spaceborne navigation satellite system reflectometry (GNSS-R) has attracted extensive attention due to its unique advantages, such as faster revisit time, lower payload costs, all-weather operation. GNSS signal reflected at L-band also significant advantages SM estimation. Usually, is estimated based on the sensitivity of GNSS-R reflectivity SM, but noise in...
An improved method for retrieving Above-ground Biomass (AGB) and Canopy Height (CH) based on an observable from Cyclone Global Navigation Satellite System (CYGNSS), soil moisture Soil Moisture Active Passive (SMAP) location is proposed. The derived CYGNSS more sensitive to vegetation. observable, the are used as input features of Artificial Neural Network (ANN) retrieve AGB CH. sensitivity analysis target parameters shows that proposed AGB/CH than conventional observable. retrievals show it...
In recent years, Global Navigation Satellite System Reflectometry (GNSS-R) technology has made considerable progress with the increasing of GNSS-R satellites in orbit, improvements data processing technology, and expansion its geophysical applications. Meanwhile, modernization evolution GNSS systems, more signal sources modulation modes are available. The effective use signals at different frequencies or from new systems can improve accuracy, reliability, resolution products. This paper...
As a novel remote-sensing method, the Global Navigation Satellite System-Reflectometry (GNSS-R) can utilize large number of reflected GNSS opportunity signals for sea ice observation. The first analysis spaceborne GNSS-R data from Chinese Jilin-1 Wideband-01B (J1-01B) Mission is carried out. 72 days delay-Doppler maps (DDMs) obtained global positioning system-reflectometry (GPS-R) and BeiDou navigation satellite (BDS-R) utilized detection. In addition to traditional pixel (pn) power...
This paper presents the TDS-1 GNSS reflectometry wind Geophysical Model Function (GMF) response to GPS block types. The observables were extracted from Delay Doppler Maps (DDMs) after taking receiver antenna gains effects and GNSS-R geometry into account. Since DDM is affected by EffectiveIsotropic Radiated Power (EIRP), we first investigate sensitivity of block. Additionally, at high SNRs are more sensitive speed, but spatial coverage signal noise ratios (SNRs) lower, while DDMs low have...
Global navigation satellite system reflectometry (GNSS-R) has emerged as a new technique to provide L-band bistatic measurements for ocean wind speed retrieval, in which traditional geophysical model functions (GMFs) or shallow neural networks (NNs) are normally used. However, it is still challenging identify and consider all relevant parameters the GMF. Meanwhile, NN models face limitations due degradation problem, restricts their depth consequently performance. Furthermore, interpretation...
This article analyzes the contribution of delay-Doppler map (DDM) observation noise to uncertainty global navigation satellite system reflectometry (GNSS-R) ocean scatterometry observables and retrieved wind speeds. For this purpose, parameter <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$K^{p}$ </tex-math></inline-formula> , which is commonly used in traditional microwave scatterometer, introduced...