A5101774806- GNSS positioning and interference
- Geophysics and Gravity Measurements
- Soil Moisture and Remote Sensing
- Ionosphere and magnetosphere dynamics
- Inertial Sensor and Navigation
- Cryospheric studies and observations
- Climate change and permafrost
- Flood Risk Assessment and Management
- Gear and Bearing Dynamics Analysis
- Meteorological Phenomena and Simulations
- Spacecraft Dynamics and Control
- Precipitation Measurement and Analysis
- Tribology and Lubrication Engineering
- Remote Sensing and Land Use
- Safety and Risk Management
- Lubricants and Their Additives
- Infrared Target Detection Methodologies
- Thermography and Photoacoustic Techniques
- Advanced Measurement and Detection Methods
- Maritime Navigation and Safety
- Advanced Optical Sensing Technologies
- Ocean Waves and Remote Sensing
- Smart Grid and Power Systems
- Diverse Scientific Research Studies
- Statistical Distribution Estimation and Applications
Hohai University
2018-2025
Linyi University
2024
Jinan University
2023
Second Xiangya Hospital of Central South University
2020
Central South University
2020
Chang'an University
2015-2019
Zhengzhou University of Light Industry
2018
Sinopec (China)
2013-2017
Abstract Background The purpose of the study is to describe blood lipid levels patients diagnosed with coronavirus disease 2019 (COVID-19) and analyze correlation between prognosis COVID-19 patients. Methods In clinical retrospective analysis, a total 228 adults infected were enrolled January 17, 2020 March 14, 2020, in Changsha, China. One thousand one hundred forty healthy participants matched age gender used as control. Median interquartile range Mann-Whitney test adopted data....
Tianwen-1, the first mission of China’s planetary exploration program, accomplished its goals orbiting, landing, and roving on Mars. The entry, descent, landing (EDL) phase directly determines success entire mission, which guidance, navigation, control (GNC) system is crucial. This paper outlines Tianwen-1 EDL GNC design by introducing requirements followed presenting architecture algorithms to meet such requirements. actual flight results for whole are also provided in this paper.
GNSS Interferometry Reflectometry (GNSS-IR) technology achieves sensing of the surrounding environment using geodetic receivers. However, a distinctive type GNSS-IR error manifests in GPS L2P signal, characterized by "double-peak" phenomenon signal-to-noise ratio (SNR) spectra, leading to inversion errors GNSS-IR. Currently, origins this are unclear, and corresponding correction strategies lacking, thereby constraining application signal. This study aims delve into causes double-peak propose...
Global navigation satellite systems (GNSS) have provided an excellent way to monitor micro-deformation in real-time. However, at local sites where landslides frequently occur, the environment can include complex surroundings with mountains, dense vegetation, and human settlements, which severely degrade accuracy of positioning GNSS technique. In this study, we propose azimuth-dependent elevation weight (ADEW) model using mask (ADEM) reduce effects multipath errors improve real-time...
A GNSS station, located on the shore of sea and inland waters, equipped with standard geodetic receivers antennas, can be used to measure water levels using a technique called Interferometric Reflectometry (GNSS-IR). The classical GNSS-IR method is based SNR data LSP spectrum analysis method. In order promote application GNSS-IR, accuracy results needs further improved, quality control achieved better. Classical methods include denoising filtering source SNR; post-processing results;...
The frequent maneuvering of BeiDou Geostationary Orbit (GEO) and Inclined Geosynchronous (IGSO) satellites affects the availability real-time orbit, decreases accuracy performance positioning, navigation time (PNT) services. satellite maneuver information cannot be obtained by common users. broadcast ephemeris is only indicator health status satellites, which are on an hourly basis, easily leading to ineffective observations. Sometimes, identification errors abnormity also appear in...
The orbital maneuvers of Global Navigation Satellite System (GNSS) Constellations will decrease the performance and accuracy positioning, navigation, timing (PNT). Because satellites in Chinese BeiDou (BDS) are Geostationary Orbit (GEO) Inclined Geosynchronous (IGSO), occur more frequently. Also, precise start moment BDS satellites' orbit maneuvering cannot be obtained by common users. This paper presented an improved real-time detecting method for anomalies with higher timeliness accuracy....
Sea-level monitoring is important for the safety of coastal cities and analysis ocean climate. Sea levels can be estimated based using global navigation satellite system–interferometry reflectometry (GNSS–IR). The frequency in a signal-to-noise ratio (SNR) arc has been found to related height between GNSS antenna reflecting surface, which called reflector (RH, h). variation surface causes an error, this error most significant GNSS–IR sea-level retrieval. key correction lies determination RH...