Xu Liu
YOU?
Author Swipe
View article: Numerical simulation of power-law acid flow in rough fractures of carbonate rocks
Numerical simulation of power-law acid flow in rough fractures of carbonate rocks Open
View article: Distributed Fiber Optic Sensing for Fracture Geometry Inversion Using All Time Steps Data
Distributed Fiber Optic Sensing for Fracture Geometry Inversion Using All Time Steps Data Open
As an advanced real-time monitoring technique, optic fiber downhole sensing has been widely applied in monitoring fracture propagation during hydraulic fracturing. However, existing fracture shape inversion methods face two main challenges…
View article: Underground Hydrogen Storage in Salt Cavern: A Review of Advantages, Challenges, and Prospects
Underground Hydrogen Storage in Salt Cavern: A Review of Advantages, Challenges, and Prospects Open
The transition to a sustainable energy future hinges on the development of reliable large-scale hydrogen storage solutions to balance the intermittency of renewable energy and decarbonize hard-to-abate industries. Underground hydrogen stor…
View article: Pollution Risk Assessment of Soil and Groundwater from Coal Gangue Backfilling in Mining Areas
Pollution Risk Assessment of Soil and Groundwater from Coal Gangue Backfilling in Mining Areas Open
View article: Optimality conditions for a class of multi-objective control problems
Optimality conditions for a class of multi-objective control problems Open
This paper is devoted to studying a class of infinite-dimensional multi-objective control problems. First, an abstract linear system is driven by a leader control and two follower controls. For each leader control, a pair of follower contr…
View article: Infiltration Control Efficiency of Soil Cover Thickness in Reducing Coal Gangue Leachate Under Simulated Rainfall Conditionsinfiltration Control Efficiency of Soil Cover Thickness in Reducing Coal Gangue Leachate Under Simulated Rainfall Conditions
Infiltration Control Efficiency of Soil Cover Thickness in Reducing Coal Gangue Leachate Under Simulated Rainfall Conditionsinfiltration Control Efficiency of Soil Cover Thickness in Reducing Coal Gangue Leachate Under Simulated Rainfall Conditions Open
View article: Ray and energy-flux velocities at a contact of two viscoelastic anisotropic materials
Ray and energy-flux velocities at a contact of two viscoelastic anisotropic materials Open
SUMMARY A g*-Hamiltonian method for tracing real rays was developed that can handle cusps and triplication of quasi-shear wave in a general viscoelastic anisotropic medium. We demonstrate that the g*-Hamiltonian method can produce homogene…
View article: A back propagation neural network-based approach for inverting layered seabed acoustic parameters in shallow waters
A back propagation neural network-based approach for inverting layered seabed acoustic parameters in shallow waters Open
Introduction Existing methods primarily focus on earth acoustic parameters inversion under specific layered structures. However, they face challenges with experimental data from unknown seabed stratification, hindering accurate parameter i…
View article: Finite-difference frequency-domain method with QR-decomposition-based complex-valued adaptive coefficients for 3D diffusive viscous wave modelling
Finite-difference frequency-domain method with QR-decomposition-based complex-valued adaptive coefficients for 3D diffusive viscous wave modelling Open
The diffusive viscous (DV) model is a useful tool for interpreting low-frequency seismic attenuation and the influence of fluid saturation on frequency-dependent reflections. Among present methods for the numerical solution of the correspo…
View article: Study on properties of AgCuInTi filler metal for active bonding of alumina ceramic
Study on properties of AgCuInTi filler metal for active bonding of alumina ceramic Open
In this paper, a novel AgCuInTi20-20-4.5 active filler paste for Al 2 O 3 bonding was prepared using the route of vacuum smelting and centrifugal atomizing powder production. The aim of the research was to characterize the AgCuInTi filler …
View article: Microstructure and Oxidation Properties of Tf550 Alloy by Laser Cladding and Ultrasonic Impact Hybrid Manufacturing
Microstructure and Oxidation Properties of Tf550 Alloy by Laser Cladding and Ultrasonic Impact Hybrid Manufacturing Open
View article: Microstructure and Oxidation Properties of Tf550 Alloy by Laser Cladding and Ultrasonic Impact Hybrid Manufacturing
Microstructure and Oxidation Properties of Tf550 Alloy by Laser Cladding and Ultrasonic Impact Hybrid Manufacturing Open
View article: Novel methods to determine the slowness and ray-velocity vectors in viscoelastic anisotropic media
Novel methods to determine the slowness and ray-velocity vectors in viscoelastic anisotropic media Open
SUMMARY Determination of the slowness vector and the homogeneous ray-velocity vector is critical for seismic ray tracing in a viscoelastic anisotropic medium. Three formulae, the traditional g-Hamiltonian, newly developed conjugate real ra…
View article: Permeability Prediction of Nanoscale Porous Materials Using Discrete Cosine Transform-Based Artificial Neural Networks
Permeability Prediction of Nanoscale Porous Materials Using Discrete Cosine Transform-Based Artificial Neural Networks Open
The permeability of porous materials determines the fluid flow rate and aids in the prediction of their mechanical properties. This study developed a novel approach that combines the discrete cosine transform (DCT) and artificial neural ne…
View article: Utilization of waste wind turbine blades in performance improvement of asphalt mixture
Utilization of waste wind turbine blades in performance improvement of asphalt mixture Open
Redundant wind turbine blades (WTBs) retired from wind power facilities produce substantial waste annually and induce challenging environmental problems. As the most widely used materials for high-grade pavement construction, asphalt mixtu…
View article: Bayesian geoacoustic parameters inversion for multi-layer seabed in shallow sea using underwater acoustic field
Bayesian geoacoustic parameters inversion for multi-layer seabed in shallow sea using underwater acoustic field Open
Seabed geoacoustic parameters play an important role in underwater acoustic channel modeling. Traditional methods to determine these parameters, for example, drilling, are expensive and are being replaced by acoustic inverse technology. An…
View article: Inversion of shallow seabed structure and geoacoustic parameters with waveguide characteristic impedance based on Bayesian approach
Inversion of shallow seabed structure and geoacoustic parameters with waveguide characteristic impedance based on Bayesian approach Open
Underwater acoustic technology is essential for ocean observation, exploration and exploitation, and its development is based on an accurate predication of underwater acoustic wave propagation. In shallow sea environments, the geoacoustic …
View article: Integration of a Gaussian quadrature grid discretization approach with a generalized stiffness reduction method and a parallelized direct solver for 3-D frequency-domain seismic wave modelling in viscoelastic anisotropic media
Integration of a Gaussian quadrature grid discretization approach with a generalized stiffness reduction method and a parallelized direct solver for 3-D frequency-domain seismic wave modelling in viscoelastic anisotropic media Open
SUMMARY We integrate three advanced numerical techniques—Gaussian quadrature grid (GQG) discretization, a new generalized stiffness reduction method and the latest version of an efficient parallelized direct solver to achieve accurate 3-D …
View article: Study of Installation Method for Large Parts of Spacecraft Based on Zero-gravity Unloading
Study of Installation Method for Large Parts of Spacecraft Based on Zero-gravity Unloading Open
The zero-gravity unloading method is a process method commonly used in the spacecraft field. It has been widely used in the docking installation and ground deployment test of load equipment such as solar wing and antenna, and it is used ac…
View article: Statistical prediction of waterflooding performance by K-means clustering and empirical modeling
Statistical prediction of waterflooding performance by K-means clustering and empirical modeling Open
Statistical prediction is often required in reservoir simulation to quantify production uncertainty or assess potential risks. Most existing uncertainty quantification procedures aim to decompose the input random field to independent rando…
View article: Determining a nonlinear hyperbolic system with unknown sources and nonlinearity
Determining a nonlinear hyperbolic system with unknown sources and nonlinearity Open
We investigate inverse boundary problems associated with a time-dependent semilinear hyperbolic equation, where both nonlinearity and sources (including initial displacement and initial velocity) are unknown. We establish in several generi…
View article: Wave Properties of Gas-Hydrate Bearing Sediments Based on Poroelasticity
Wave Properties of Gas-Hydrate Bearing Sediments Based on Poroelasticity Open
Natural gas hydrates have the properties of ice with a microporous structure and its concentration in sediments highly affects the wave velocity and attenuation. Previous studies have performed investigations based on the measurements of l…
Explicit Q expressions for inhomogeneous P- and SV-waves in isotropic viscoelastic media Open
View article: Analysis of factors affecting small-scale farmland water conservancy construction based on the perspective of farmers’ subdivision
Analysis of factors affecting small-scale farmland water conservancy construction based on the perspective of farmers’ subdivision Open
This paper uses the survey data of Baoying and Shuyang counties in Jiangsu Province to analyze the investment intentions and behavioral orientations of different types of farmers on the construction of small-scale farmland water conservanc…
View article: Factors that trigger the development of mining-induced ground fissures, and standards to treat them in shallow coal mining areas
Factors that trigger the development of mining-induced ground fissures, and standards to treat them in shallow coal mining areas Open
The exploitation of shallow coal seams causes severe surface subsidence and triggers the development of numerous ground fissures, which threaten the safety of underground mining and damage the surface eco-environment.We studied the law of …
View article: A Virtual Boundary Element Method for Three-Dimensional Inverse Heat Conduction Problems in Orthotropic Media
A Virtual Boundary Element Method for Three-Dimensional Inverse Heat Conduction Problems in Orthotropic Media Open
This paper aims to apply a virtual boundary element method (VBEM) to solve the inverse problems of three-dimensional heat conduction in orthotropic media. This method avoids the singular integrations in the conventional bound... | Find, re…
View article: Effective Biot theory and its generalization to poroviscoelastic models
Effective Biot theory and its generalization to poroviscoelastic models Open
A method is suggested to express the effective bulk modulus of the solid frame of a poroelastic material as a function of the saturated bulk modulus. This method enables effective Biot theory to be described through the use of seismic disp…
View article: A weighted identity for stochastic partial differential operators and its applications
A weighted identity for stochastic partial differential operators and its applications Open
In this paper, a pointwise weighted identity for some stochastic partial differential operators (with complex principal parts) is established. This identity presents a unified approach in studying the controllability, observability and inv…