A5019356977- Cryospheric studies and observations
- Geophysical Methods and Applications
- Metamaterials and Metasurfaces Applications
- Climate change and permafrost
- Arctic and Antarctic ice dynamics
- Antenna Design and Analysis
- Advanced Antenna and Metasurface Technologies
- Indoor and Outdoor Localization Technologies
- IoT Networks and Protocols
- Winter Sports Injuries and Performance
- Acoustic Wave Phenomena Research
- Microwave Imaging and Scattering Analysis
- Underwater Vehicles and Communication Systems
- Seismic Waves and Analysis
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Underwater Acoustics Research
- Acoustic Wave Resonator Technologies
- Landslides and related hazards
- Seismic Imaging and Inversion Techniques
- Geophysics and Gravity Measurements
- Soil Moisture and Remote Sensing
- Energy Harvesting in Wireless Networks
- Geotechnical Engineering and Underground Structures
- Geophysical and Geoelectrical Methods
- Microwave Engineering and Waveguides
Tongji University
2016-2025
Anhui University
2024
University of Birmingham
2011-2022
Xidian University
2016-2021
Shandong University
2019-2021
Shanghai Stomatological Hospital
2018
Fudan University
2018
Science Oxford
2005-2008
University of Oxford
2005-2008
Lakes and permafrost on Qinghai-Tibet Plateau (QTP) are both important indicators of climate change. Previous literatures have shown the usefulness optical remote sensing in lake expansion monitoring effectiveness synthetic aperture radar (SAR) interferometry (InSAR) retrieving deformation QTP. However, none them incorporated InSAR to investigate an event that may exhibit causal links between outburst degradation. This study integrated Google Earth Engine (GEE) analysis images small baseline...
Abstract We study experimentally and theoretically coupling mechanisms between metamaterial elements of the split ring resonator (SRR) type. show that, depending on orientation relative to each other, may be either magnetic or electric type a combination both. Experimental results SRRs with resonances around 1.7–1.9 GHz agree quantitatively simulations (CST Microwave Studio). Further provide analysis for variety both in 20 THz frequency regions. The can employed designing near field...
A variety of industrial applications are deployed in underground environments, such as soil condition assessment and pipeline monitoring (PM). Wireless sensor networks (WUSNs) capable continuously pipelines promptly alerting any anomaly entities. However, soils significantly influence the traditional WUSNs connectivity success. Long range (LoRa), being a leading low-power wide-area (LPWANs) technology, provides new solution for with its advantages long-range capability ultralow power...
We present a design of low-frequency perfect acoustic absorption metaporous composite with frequency tunability and the insensitivity to incident angle based on critical coupling mechanism. The is constructed by embedding an Archimedean spiral structure in traditional porous materials. verified tunable balance dissipation leakage adjusting slit orientation embedded width depth Our simulations show that composite's thickness 1/20th corresponding wavelength at (PA). Experiment complex plane...
Permafrost in Qinghai–Tibet Plateau (QTP) has been suffering from global warming recent years, characterized by the deepening of permafrost active layer. Seasonal changes are usually reflected as ground surface deformation, which can be monitored multi-temporal interferometric synthetic aperture radar (MT-InSAR) technology. Owing to extreme environment QTP, there few ground-based deformational observation data available, and records monitoring MT-InSAR with validation limited. Here we...
Abstract. We present the results of an assessment ice surface elevation measurements from NASA's Ice, Cloud, and land Elevation Satellite-2 (ICESat-2) along CHINARE (CHINese Antarctic Research Expedition) route near Amery Ice Shelf in East Antarctica. The validation campaign was designed implemented cooperation with 36th expedition December 2019 to February 2020. ICESat-2 geolocated photon product (ATL03) (ATL06) performed based on coordinated multi-sensor observations using two roof-mounted...
We study theoretically and experimentally the acoustic Purcell effect induced by quasi-bound states in continuum (quasiBICs). A theoretical framework describing of a resonant system is developed based on system's radiative dissipative factors, which reveals critical emission condition for achieving optimum factors. show that quasiBICs contribute to highly confined field bring about greatly enhanced emission, leading strong effect. Our concept demonstrated via two coupled resonators...
Hoh Xil is an uninhabited extremity secluded on the Tibetan Plateau hinterland. A complete mapping of ground motion variation in essential for in-depth understanding terrain's responses to climate change Plateau. However, inaccessibility and extremely harsh environment impeded extensive field investigations landform alteration its formative process. Such difficulty can be resolved by Interferometric Synthetic Aperture Radar (InSAR), which enables a broad detection subtle permafrost motions...
The successful operation of buried infrastructure within urban environments is fundamental to the conservation modern living standards. Open-cut methods are predominantly used, in preference trenchless technology, effect a repair, replace or install new section network. This is, part, due inability determine position all utilities below carriageway, making open-cut desirable terms dealing with uncertainty since progressively exposed during excavation. However, damage carriageway and disrupt...
Ground penetrating radar (GPR) signal processing has used mode decomposition methods such as empirical (EMD), variational decomposition, and their variations, but these are typically constrained by manual selection for the extraction of real signals unwanted noises. In this study, we propose an automatic scheme GPR denoising, which is demonstrated combination improved complete ensemble EMD (ICEEMD) multiscale principal component analysis (MSPCA). For B-scan data, intrinsic functions (IMFs)...
Subglacial water bodies are critical components in analyzing the instability of Antarctic ice sheet. Their detection and identification normally rely on geophysical remote sensing methods such as airborne radar echo sounding (RES), ground seismic, satellite/airborne altimetry gravity surveys. In particular, RES surveys able to detect basal terrain with a relatively high accuracy that can assist mapping subglacial hydrology systems. Traditional processing for mostly their brightness...
In this paper, an ultra-broadband, wide-angle polarization-insensitive metamaterial absorber is designed at microwave frequencies. The consists of a periodic array metallic strips with the lumped resistances fabricated on dielectric substrate ground plane. proposed single-layered and symmetric, thus leading to very thin characteristics. According surface current distributions, can operate three resonant modes including two dipole resonances LC resonance. By adjusting geometry structure, be...
Permafrost is extremely sensitive to variance in external hydrothermal conditions. InSAR has advantages monitoring surface deformation with decent temporal and spatial resolution as well millimeter precision. In particular, the StaMPS-InSAR method can remove disturbances of inaccurate digital elevation model (DEM), atmospheric delays spatiotemporal decorrelation for an accurate estimation deformation. this paper, a set ascending descending Sentinel-1 imageries spanning from March 2017 June...
In this paper, an efficient plastic pipe detecting model is proposed, which combines the ground penetrating radar (GPR) and electric field method. The consists of locating (EFLM) GPR B-scan image interpreting (GBII) model. Synchronized data are collected through a acquisition device dedicatedly designed for swift accurate estimation buried pipes. EFLM estimates approximate locations underground pipes from quickly, separates into segments, keeps segments that might contain hyperbolas,...
Deeply buried inclusions such as pipes and cables cannot be detected when the air-ground interface suffers severe impedance mismatch, resulting in little electromagnetic (EM) signals penetrating subsurface, even before scattering reflection from occur. Therefore, increasing penetration depth by effectively enhancing EM transmission into lossy subsurface domain is of great importance. In this article, we present our simulation experimental results a type antireflection metasurfaces that can...
Abstract The Purcell effect significantly improves the performance of various emission devices but is typically constrained by a narrow operational bandwidth due to inherent resonant mechanisms. This study achieves broadband acoustic effect, substantially boosting sound exploring collective quasibound states in continuum (QBICs). A six‐cavity coupled system supporting five QBICs introduced, wherein all interact strongly with an source. takes advantage high quality factors and strong mode...