A5103731711- Rock Mechanics and Modeling
- Hydraulic Fracturing and Reservoir Analysis
- Methane Hydrates and Related Phenomena
- Drilling and Well Engineering
- Landslides and related hazards
- Hydrocarbon exploration and reservoir analysis
- CO2 Sequestration and Geologic Interactions
- Astrophysical Phenomena and Observations
- Stellar, planetary, and galactic studies
- Seismic Imaging and Inversion Techniques
- Astrophysics and Star Formation Studies
- Astrophysics and Cosmic Phenomena
- Galaxies: Formation, Evolution, Phenomena
- Advanced Vision and Imaging
- Groundwater flow and contamination studies
- Gamma-ray bursts and supernovae
- Advanced Image Processing Techniques
- Advanced Image and Video Retrieval Techniques
- Building materials and conservation
- Coal Properties and Utilization
- Geotechnical and Geomechanical Engineering
- Image and Video Quality Assessment
- Vibration Control and Rheological Fluids
- Algorithms and Data Compression
- Geophysical Methods and Applications
Chinese Academy of Sciences
2015-2024
Institute of Geology and Geophysics
2017-2024
Xinjiang Normal University
2020
University of Chinese Academy of Sciences
2015-2019
Xinjiang Astronomical Observatory
2014-2015
Yunnan Observatories
2015
Fujian Normal University
2011
Zhejiang University
2011
A modified fluid-mechanically coupled algorithm in PFC2D was adopted this article to study the influence of grain size heterogeneity and in-situ stress on hydraulic fracturing behavior. Simulated results showed that significantly affect initiation, growth, spatial distribution fractures: (1) initiation breakdown pressure are gradually reduced with increase heterogeneity; (2) increased stress, increase, reduction effect becomes more obvious; (3) homogeneous rock, decreases increasing ratio,...
Hydraulic fracturing is a key technical means for stimulating tight and low permeability reservoirs to improve the production, which widely employed in development of unconventional energy resources, including shale gas, oil, gas hydrate, dry hot rock. Although significant progress has been made simulation single well using two-dimensional Particle Flow Code (PFC2D), understanding multi-well hydraulic characteristics still limited. Exploring mechanisms fluid-driven fracture initiation,...
Rock is an aggregate of mineral grains, and the grain shape has obvious influence on rock mechanical behaviors. Current research mostly focuses loose granular materials lacks standardized quantitative methods. Based CLUMP method in two-dimensional particle flow code (PFC2D), three different groups were generated: strip, triangle, square. Flatness roughness adopted to describe overall contour surface morphology respectively. Simulated results showed that significantly affected porosity...
By using a modified PFC2D model, the authors conducted series of simulations to examine influences in-situ stress ratio, fluid injection rate, anisotropy laminated rocks, and perforation parameters on hydraulic fracturing process. The indicated that: 1) larger ratio will induce smaller breakdown pressures faster propagation, fractures extend along direction maximum principal or approach this preferred path; 2) difference stresses rate is helpful for creation complex fracture network; 3) weak...
The mechanical characteristics of gas hydrate-bearing sediments (HBS) are important for evaluating reservoir stability. interbedded formation HBS is common in target mining reservoirs. Existing studies on the triaxial properties primarily based homogeneous and isotropic samples. Therefore, stress–strain law reservoirs cannot be predicted accurately. In this study, a series sediment models with interlayers coarse fine mineral grains were established PFC3D code, influence layered distribution...
The permeability of natural gas hydrate (NGH) turbidite reservoirs typically exhibits significant anisotropy, with anisotropy being a crucial basis for evaluating reservoir production. presence hydrates, as constituent the solid framework, not only impacts overall but also influences anisotropy. To investigate saturation sensitivity series simulations are performed by integrating particle flow and computational fluid dynamics methods to construct homogeneous layered numerical samples compute...
Abstract It is believed that dual active galactic nuclei (AGN) form during galaxy mergers. Studying dual-AGN emission can provide valuable insights into merging and evolution. To investigate parsec-scale radio properties, we observed eight components of four selected systems using the Very Long Baseline Array (VLBA) at 5 GHz in multiple-phase-center mode. Among them, two compact components, labeled J0051+0020B J2300-0005A, were detected clearly on parsec scales for first time. However, other...
Diffusion-based Generative Models (DGMs) have achieved unparalleled performance in synthesizing high-quality visual content, opening up the opportunity to improve image super-resolution (SR) tasks. Recent solutions for these tasks often train architecture-specific DGMs from scratch, or require iterative fine-tuning and distillation on pre-trained DGMs, both of which take considerable time hardware investments. More seriously, since are established with a discrete pre-defined upsampling...
Online video streaming has fundamental limitations on the transmission bandwidth and computational capacity super-resolution is a promising potential solution. However, applying existing methods to online non-trivial. Existing codecs protocols (\eg, WebRTC) dynamically change quality both spatially temporally, which leads diverse dynamic degradations. Furthermore, strict requirement for latency that most are less applicable. As result, this paper focuses rarely exploited problem setting of...
We analyze the jet-disk coupling for different subsamples from a complete hard X-ray Seyfert sample to study indices and their relation accretion rate. The results are: (1) power-law index ranges nearly unity (linear correlation) radio-loud Seyferts significantly less than radio-quiet ones. This declining trend of also holds larger sources compact ones; (2) with intermediate high rate (Eddington ratio $\lambda\sim$ 0.001 0.3) show linear coupling, but it shallows near super Eddington...