A5101603512- Seismic Imaging and Inversion Techniques
- Seismic Waves and Analysis
- Seismology and Earthquake Studies
- earthquake and tectonic studies
- Drilling and Well Engineering
- Geological and Geophysical Studies
- Hydraulic Fracturing and Reservoir Analysis
- Hydrocarbon exploration and reservoir analysis
- High-pressure geophysics and materials
- Methane Hydrates and Related Phenomena
- Reservoir Engineering and Simulation Methods
- Geological and Geochemical Analysis
- Prostate Cancer Diagnosis and Treatment
- Acoustic Wave Phenomena Research
- Advanced Technologies in Various Fields
- Geophysical and Geoelectrical Methods
- Earthquake Detection and Analysis
- Geophysical Methods and Applications
- Urinary Bladder and Prostate Research
- Underwater Acoustics Research
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Drug Solubulity and Delivery Systems
- Advanced Numerical Analysis Techniques
- Composite Structure Analysis and Optimization
Ocean University of China
2015-2024
Shanghai Jiao Tong University
2024
The University of Texas at Austin
2022-2024
Shenzhen General Institute of Architectural Design and Research (China)
2024
Jiangsu University
2024
Qingdao National Laboratory for Marine Science and Technology
2016-2024
Changchun University of Technology
2023
First Affiliated Hospital of Anhui Medical University
2023
Anhui Medical University
2023
Changchun University of Science and Technology
2023
In the logging-while-drilling acoustic measurements, distinguishing and estimating formation properties from interfering signals are commonly deemed difficult. this study, we present results of a new signal processing technique based on supervirtual interferometry theory for LWD data processing. Analytical numerical modeling is used to analyze waveform characteristics different collar attention effects. The show that identification can be difficult in presence wave, especially situation when...
Mapping the crustal structure beneath South Yellow Sea (SYS), which includes collision zone between North China Block and Block, will help to reveal geologic history relationship these blocks. Previous interpretations of SYS did not use detailed seismic velocity as a constraint. We produced an upper model northern using new wide‐angle dataset. Velocity anomalies resolved by our models correlate well with known features such sedimentary basins tectonic uplifts in low‐ high‐velocity anomalies,...
Offshore freshened groundwater (OFG) has been encountered in continental margins around the world and identified as a potential unconventional water resource. In China, coastal areas islands face limited freshwater resources. The East China Sea, specifically region north of Shengsi islands, may contain an OFG system hosted buried paleochannels associated with ancient Yangtze river. To assess potential, characteristics, controls this region, we employed integrated modeling approach. We...
ent cells, even within the same lobule. 7mportantly, aging is a significant risk factor for various liver diseases, such as hepatitis, fibrosis, cirrhosis, and hepatocellular carcinoma.Additionally, incidence of chronic disease increases with age associated AbstractChronic diseases osteoporosis, seemingly unrelated that occur advanced age, are involved in different mechanisms contributing to bone metabolic disorders.Secondary osteoporosis increased fragility common complications patients...
This paper presents a study on quadrotor unmanned aerial vehicle (UAV) fault-tolerant control scheme. According to the attitude model and safety of aircraft under uncertainty inertial matrix, state constraint by reinforcement learning is designed ensure safety. Even if boundary crossed, it can be pulled back means penalty function with learning. Meanwhile, in order inhibit oscillation caused immediate reward as usual, an adaptive update law proposed. Furthermore, considering coupled actuator...
Oil and gas are important energy resources industry materials. They stored in pores fractures of subsurface rocks over thousands meters depth, making the finding distinguishing them to be a significant challenge. The geophysical methods, especially seismic well-logging effective ways identify oil reservoirs widely used industry. Due complexity near surface structures new exploration targets, methods based on advanced computation physical principles continuously proposed cope with emerging...
First-arrival traveltime tomography is a popular approach to building the near-surface velocity models for oil and gas exploration, mining, geoengineering, environmental studies. However, presence of velocity-inversion interfaces (VIIs), across which overlying higher than underlying velocity, might corrupt tomographic solutions. This because most first-arrival raypaths will not traverse along any VII, such as top low-velocity zone. We have examined impact VIIs on model near surface using...
When a doublet of closely spaced microearthquakes occur nearly simultaneously, their overlapping waveforms complicate the picking first-arrival times and challenge traveltime-based location methods to estimate origin time each event in doublet. The reverse-time imaging (RTI) method locates earthquakes by backpropagating reconstructed wave fronts P S waves source locations thereby removing need pick first arrivals. Using an elastic RTI method, we successfully estimated microearthquakes: ML0.1...
Abstract Recent advances in artificial intelligence allow seismologists to upgrade the workflow for locating earthquakes. The standard concatenates a sequence of data processing modules, including event detection, phase picking, association, and location, with elaborately fine-tuned parameters, lacking automation convenience. Here, we leverage deep reinforcement learning develop state-of-the-art earthquake robot (EQBot) help advance automated location. EQBot learns from tremendous...
Abstract The Synchrosqueezing S‐transform (SSST) is a novel approach for time‐frequency (T‐F) representation of non‐stationary signals. By “squeezing” T‐F spectrum the (ST) signal, SSST can obtain high‐resolution spectrum. However, when phase signal varies non‐linearly with time, instantaneous frequency (IF) calculated by would be inaccurate, causing reduction resolution In order to improve its performance in imaging such signals, we modify formula IF help second‐order partial derivatives...
Abstract The teleseismic virtual‐source reflection (TVR) profiling method uses free‐surface reverberations of the P ‐wave ( PPdp phase) data to produce an image subsurface. Upper‐crustal reflections can be retrieved by deconvolving average source wavelet for all stations in array from coda recorded at each station array. We present a case study which we construct upper‐crustal TVR images Three Gorges (TG) region, China, based on dataset four events linear regional geophones. features...
The reliability of low frequencies is a crucial question for geophone records. An example the data recorded passive seismic studies using geophones paired with TEXAN miniature recorders, where high resonance frequency degrades low‐frequency waveforms and increases ambiguity in phase picking. We have evaluated such from mobile array geophone‐TEXAN pairs central China. response can be easily established Power Spectral Density Ratio (PSDR) between records broadband seismometer occupying same...