A5101877952- Soil Moisture and Remote Sensing
- Precipitation Measurement and Analysis
- Ocean Waves and Remote Sensing
- GNSS positioning and interference
- stochastic dynamics and bifurcation
- Probabilistic and Robust Engineering Design
- Ultra-Wideband Communications Technology
- Space Satellite Systems and Control
- Historical Geography and Cartography
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Microwave Imaging and Scattering Analysis
- Geophysics and Gravity Measurements
- Indoor and Outdoor Localization Technologies
- Cryospheric studies and observations
- Spacecraft Design and Technology
- Chaos control and synchronization
- Structural Analysis and Optimization
- Machine Fault Diagnosis Techniques
- Maritime Navigation and Safety
China University of Mining and Technology
2017-2022
This article presents a review on spaceborne Global Navigation Satellite System Reflectometry (GNSS-R), which is an important part of GNSS-R technology and has attracted great attention from academia, industry government agencies in recent years. Compared with ground-based airborne approaches, number advantages, including wide coverage the ability to sense medium- large-scale phenomena such as ocean eddies, hurricanes tsunamis. Since 2014, about seven satellite missions have been...
Due to the strong penetration ability and high transmission rate of ultra-wideband (UWB) signals, UWB technology plays a very significant role in field precise indoor positioning. However, harsh volatile environment leads non-line-of-sight (NLOS) propagation severe attenuation which may generate ranging positioning errors. To mitigate NLOS effect improve accuracy, existing methods use information channel impulse response (CIR) identify signal channels. these identification often require...
Global Navigation Satellite System (GNSS)-Reflectometry (GNSS-R) technology has opened a new window for ocean remote sensing because of its unique advantages, including short revisit period, low observation cost, and high spatial-temporal resolution. In this article, we investigated the potential estimating swell height from delay-Doppler maps (DDMs) data generated by spaceborne GNSS-R. Three observables extracted DDM are introduced estimation, map average (DDMA), leading edge slope (LES)...
This paper focuses on sea surface wind speed estimation using L1B level v3.1 data of reflected GNSS signals from the Cyclone (CYGNSS) mission and European Centre for Medium-range Weather Forecast Reanalysis (ECMWF) data. Seven machine learning methods are applied retrieval, i.e., Regression trees (Binary Tree (BT), Ensembles Trees (ET), XGBoost (XGB), LightGBM (LGBM)), ANN (Artificial neural network), Stepwise Linear (SLR), Gaussian Support Vector Machine (GSVM), a comparison their...
Reliable rainfall information is very important for hydro climatology research, industrial and agricultural production, construction, drought flood prediction. As a new remote sensing technology, Global Navigation Satellite System-reflectometry (GNSS-R) can be used to retrieve geophysical parameters due its unique advantages of high spatial temporal resolution, low cost, large coverage, all-weather operation. Existing studies have confirmed that GNSS-R technology detect on the ocean surface,...
In mechanical engineering field, early fault features are extremely weak and submerged in heavy noise, the feature extraction is quite challenging. this work, we apply adaptive stochastic resonance cascaded piecewise-linear system to extract features. The realized by quantum particle swarm algorithm. By optimizing parameters, efficiency of improved greatly. As a result, can be easily extracted eventually. effectiveness high-performance proposed method verified numerical simulation...
This paper mainly studies the inversion of sea surface wind speed based on spaceborne Global Navigation Satellite System-Reflectometry (GNSS-R) data. Delayed Doppler Map (DDM) is one most important data acquired by GNSS-R receivers. We make use four DDM-based observations (DDM average (DDMA), signal-to-noise ratio (SNR), leading edge slope (LES) Integrated Delay Waveform (IDW) and Normalized Bistatic Radar Cross Section (NBRCS)) to retrieve speed. first propose a filtering method LES IDW for...
In the deployment analysis of a satellite system, if one or more components are flexible, then simulation will not be accurate because violation rigid body assumption. Mode shapes used to represent dynamic behavior an elastic structure. A modal synthesis method which uses combination normal modes, constraint and attachment is effectively flexible Since these modes should different for each type connecting part, studied various types interconnecting joints. Also, procedure explained. system...