Xinyuan Wu
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View article: Numerical simulation of coupled flow dynamics in bottom-water reservoirs and horizontal wells
Numerical simulation of coupled flow dynamics in bottom-water reservoirs and horizontal wells Open
View article: The impact of autonomous vehicles on ride-hailing platforms with strategic human drivers
The impact of autonomous vehicles on ride-hailing platforms with strategic human drivers Open
View article: Numerical Simulation of Coupling Reservoir and Horizontal Well-Flow Dynamics in Bottom Water Reservoirs
Numerical Simulation of Coupling Reservoir and Horizontal Well-Flow Dynamics in Bottom Water Reservoirs Open
Horizontal wells are a primary method employed for extracting reservoirs with bottom water. Accurately comprehending the contribution of output and the dynamic production at the bottomhole of each section of the horizontal well serves as t…
View article: Effect of liquid level monitor gas injection point size on information source amplitude-frequency characteristics
Effect of liquid level monitor gas injection point size on information source amplitude-frequency characteristics Open
In order to analyse the effect of the injection point size of the CBM (Coalbed Methane) well level monitor on the amplitude and frequency of pressure pulsations in the wellhead manifold, numerical simulations and experiments were carried o…
View article: Aerial IRS with Robotic Anchoring Capabilities: A Novel Way for Adaptive Coverage Enhancement
Aerial IRS with Robotic Anchoring Capabilities: A Novel Way for Adaptive Coverage Enhancement Open
It is widely accepted that integrating intelligent reflecting surfaces (IRSs) with unmanned aerial vehicles (UAV) or drones can assist wireless networks in improving network coverage and end user Quality of Service (QoS). However, the crit…
View article: Accelerated damp-heat testing at the cell-level of bifacial silicon HJT, PERC and TOPCon solar cells using sodium chloride
Accelerated damp-heat testing at the cell-level of bifacial silicon HJT, PERC and TOPCon solar cells using sodium chloride Open
Bifacial passivated emitter and rear cells (PERC) currently have the highest share in the photovoltaic market. However, heterojunction (HJT) and tunnel oxide passivated contact (TOPCon) solar cells are expected to gain significant market s…
View article: Sensing performance of textile strain sensors with different weave structures
Sensing performance of textile strain sensors with different weave structures Open
Many conductive fabrics have been widely used as fabric strain sensors in recent years due to their excellent flexibility. In this study, high-tenacity polyester warp yarn and silver-coated nylon weft yarn were used to produce six types of…
View article: Four failure modes in silicon heterojunction glass-backsheet modules
Four failure modes in silicon heterojunction glass-backsheet modules Open
Silicon heterojunction technology (HJT) is expected to gain a significant market share in the near future. For HJT to deliver a low levelized cost of electricity (LCOE), it needs to have a high initial efficiency and degrade less than 0.5%…
View article: Numerical Estimation of Gas Release and Dispersion from a Submarine Pipeline
Numerical Estimation of Gas Release and Dispersion from a Submarine Pipeline Open
Submarine pipeline gas releases and dispersions can cause safety concerns such as fire and explosion, which can cause serious casualties and property losses. There are many existing studies on the impacts of the horizontal diffusion distan…
View article: Separation performance of hydrocyclone oil removal device influenced by oil droplet trajectory and oil drop characteristics
Separation performance of hydrocyclone oil removal device influenced by oil droplet trajectory and oil drop characteristics Open
Cyclone separation is an effective method for the treatment of oily wastewater from offshore oil production platforms. There is a lack of research on the impact of dispersion on the separation efficiency of current liquid–liquid separation…
View article: Synergetic Effects of Na+-Mo6+ Co-Doping on Layered Li1.2mn0.54ni0.13co0.13o2 Cathode for High Performance Lithium-Ion Batteries
Synergetic Effects of Na+-Mo6+ Co-Doping on Layered Li1.2mn0.54ni0.13co0.13o2 Cathode for High Performance Lithium-Ion Batteries Open
View article: Cover Image
Cover Image Open
The cover image is based on the Research Article Tube-type plasma-enhanced atomic layer deposition of aluminum oxide: Enabling record lab performance for the industry with demonstrated cell efficiencies >24% by Baochen Liao et al., https:/…
View article: Two new classes of exponential Runge-Kutta integrators for efficiently solving stiff systems or highly oscillatory problems
Two new classes of exponential Runge-Kutta integrators for efficiently solving stiff systems or highly oscillatory problems Open
We note a fact that stiff systems or differential equations that have highly oscillatory solutions cannot be solved efficiently using conventional methods. In this paper, we study two new classes of exponential Runge-Kutta (ERK) integrator…
View article: How should the server sleep? -- Age-energy tradeoff in sleep-wake server systems
How should the server sleep? -- Age-energy tradeoff in sleep-wake server systems Open
The surging demand for fresh information from various Internet of Things (IoT) applications requires oceans of data sampled from the physical environment to be transmitted and processed timely, which would lead to huge energy consumption. …
View article: Research on Wasp population based on Gray Prediction and Fuzzy Analytic hierarchy process
Research on Wasp population based on Gray Prediction and Fuzzy Analytic hierarchy process Open
The invasion of exotic species should be paid attention to because of its severe consequences, and governments have constructed monitoring and tracking system to collect people’s sightings of species. For example, Asian giant hornet, an ex…
View article: Continuous trigonometric collocation polynomial approximations with geometric and superconvergence analysis for efficiently solving semi-linear highly oscillatory hyperbolic systems
Continuous trigonometric collocation polynomial approximations with geometric and superconvergence analysis for efficiently solving semi-linear highly oscillatory hyperbolic systems Open
In this paper, based on the continuous collocation polynomial approximations, we derive and analyse a class of trigonometric collocation integrators for solving the highly oscillatory hyperbolic system. The symmetry, convergence and energy…
View article: A two-step symmetric method for charged-particle dynamics in a normal or strong magnetic feld
A two-step symmetric method for charged-particle dynamics in a normal or strong magnetic feld Open
The study of the long time conservation for numerical methods poses interesting and challenging questions from the point of view of geometric integration. In this paper, we analyze the long time energy and magnetic moment conservations of …
View article: Long time conservations of two-step symmetric methods for charged-particle dynamics in a normal or strong magnetic field
Long time conservations of two-step symmetric methods for charged-particle dynamics in a normal or strong magnetic field Open
The study of the long time conservation for numerical methods poses interesting and challenging questions from the point of view of geometric integration. In this paper, we analyze the long time conservations of two-step symmetric methods …
View article: Long-time momentum and actions behaviour of energy-preserving methods for semilinear wave equations via spatial spectral semi-discretizations
Long-time momentum and actions behaviour of energy-preserving methods for semilinear wave equations via spatial spectral semi-discretizations Open
As is known that wave equations have physically very important properties which should be respected by numerical schemes in order to predict correctly the solution over a long time period. In this paper, the long-time behaviour of momentum…
View article: Long-time oscillatory energy conservation of total energy-preserving methods for highly oscillatory Hamiltonian systems
Long-time oscillatory energy conservation of total energy-preserving methods for highly oscillatory Hamiltonian systems Open
For an integrator when applied to a highly oscillatory system, the near conservation of the oscillatory energy over long times is an important aspect. In this paper, we study the long-time near conservation of oscillatory energy for the ad…
View article: Volume-preserving exponential integrators
Volume-preserving exponential integrators Open
As is known that various dynamical systems including all Hamiltonian systems preserve volume in phase space. This qualitative geometrical property of the analytical solution should be respected in the sense of Geometric Integration. This p…
View article: Long-term analysis of symplectic or symmetric extended RKN methods for nonlinear wave equations
Long-term analysis of symplectic or symmetric extended RKN methods for nonlinear wave equations Open
This paper analyses the long-time behaviour of one-stage symplectic or symmetric extended Runge--Kutta--Nyström (ERKN) methods when applied to nonlinear wave equations. It is shown that energy, momentum, and all harmonic actions are approx…
View article: Numerical conservation of energy, momentum and actions for extended RKN methods when applied to nonlinear wave equations via spatial spectral semi-discretizations
Numerical conservation of energy, momentum and actions for extended RKN methods when applied to nonlinear wave equations via spatial spectral semi-discretizations Open
This paper analyses the long-time behaviour of extended Runge--Kutta--Nystr\{o}m (ERKN) methods when applied to nonlinear wave equations. It is shown that energy, momentum, and all harmonic actions are approximately preserved over a long t…
View article: Long-time analysis of extended RKN integrators for Hamiltonian systems with a solution-dependent high frequency
Long-time analysis of extended RKN integrators for Hamiltonian systems with a solution-dependent high frequency Open
In this paper, we analyse the long-time behaviour of the extended RKN (ERKN) integrators for solving highly oscillatory Hamiltonian systems with a slowly varying, solution-dependent high frequency. We prove that a symmetric ERKN integrator…
View article: Functionally-fitted energy-preserving integrators for Poisson systems
Functionally-fitted energy-preserving integrators for Poisson systems Open
View article: Exponential collocation methods for the cubic Schrödinger equation
Exponential collocation methods for the cubic Schrödinger equation Open
In this paper we derive and analyse new exponential collocation methods to efficiently solve the cubic Schrödinger Cauchy problem on a $d$-dimensional torus. Energy preservation is a key feature of the cubic Schrödinger equation. It is pro…
View article: Arbitrary-order energy-preserving exponential integrators for the cubic Schr\"{o}dinger equation
Arbitrary-order energy-preserving exponential integrators for the cubic Schr\"{o}dinger equation Open
In this paper we derive and analyse new and efficient energy-preserving exponential integrators of arbitrarily high order to solve the cubic Schr\{o}dinger Cauchy problem on a $d$-dimensional torus. Energy preservation is a key feature of …
View article: Exponential collocation methods for conservative or dissipative systems
Exponential collocation methods for conservative or dissipative systems Open
In this paper, we propose and analyse a novel class of exponential collocation methods for solving conservative or dissipative systems based on exponential integrators and collocation methods. It is shown that these novel methods can be of…
View article: Arbitrary-order exponential energy-preserving collocation methods for solving conservative or dissipative systems
Arbitrary-order exponential energy-preserving collocation methods for solving conservative or dissipative systems Open
In this paper, we present and analyse a novel class of exponential energy-preserving collocation methods for solving conservative or dissipative systems based on exponential integrators and finite element methods. It is shown that these no…
View article: Long-time numerical energy conservation of extended RKN integrators for highly oscillatory Hamiltonian systems
Long-time numerical energy conservation of extended RKN integrators for highly oscillatory Hamiltonian systems Open
The aim of this paper is to analyze the long-time behaviour of extended Runge--Kutta--Nystr\{o}m (ERKN) integrators for highly oscillatory Hamiltonian systems. It is important to note that the well-known Gautschi-type methods of order two …