Qingguo Liu
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View article: Blowing Up Solutions to Slightly Sub- or Super-Critical Lane-Emden Systems with Neumann Boundary Conditions
Blowing Up Solutions to Slightly Sub- or Super-Critical Lane-Emden Systems with Neumann Boundary Conditions Open
We prove that, for some suitable smooth bounded domain, there exists a solution to the following Neumann problem for the Lane-Emden system:where $Ω$ is some smooth bounded domain in $\mathbb{R}^N,$ $N ≥ 4,$ $\mu > 0,$ $α > 0,$ $β > 0$ are …
View article: Biofilm-based biocatalysis for β-cyclodextrin production by the surface-display of β-cyclodextrin glycosyltransferase in Bacillus subtilis
Biofilm-based biocatalysis for β-cyclodextrin production by the surface-display of β-cyclodextrin glycosyltransferase in Bacillus subtilis Open
β-cyclodextrin (β-CD) is an important cyclic oligosaccharide, which is widely applicated in foods, environmental protection, and cosmetics, primarily prepared from enzymatic synthesis in traditional industry. However, several challenges pe…
View article: On the Modeling View of Freehand Brushwork Figure Painting
On the Modeling View of Freehand Brushwork Figure Painting Open
Freehand brushwork figure painting is an important part of traditional Chinese painting. Its unique modeling view and expression technique show the painter s deep understanding of the character image and his unique artistic feeling. This p…
View article: Basement Reservoirs in China: Distribution and Factors Controlling Hydrocarbon Accumulation
Basement Reservoirs in China: Distribution and Factors Controlling Hydrocarbon Accumulation Open
The oil reserves of global basement reservoirs are 248 × 108 t and natural gas reserves are 2681 × 108 m3; they are crucial links in the future oil and natural gas exploration field and play an irreplaceable role in increasing oil and natu…
View article: Research Status, Existing Problems, and the Prospect of New Methods of Determining the Lower Limit of the Physical Properties of Tight Sandstone Reservoirs
Research Status, Existing Problems, and the Prospect of New Methods of Determining the Lower Limit of the Physical Properties of Tight Sandstone Reservoirs Open
At present, many methods are used to determine the lower limits of physical properties (PPLLs) of tight sandstone reservoirs, such as empirical statistics, oil occurrence, and logging parameter crossplots, but the accuracy with which these…
View article: Image restoration algorithm for terahertz FMCW radar imaging
Image restoration algorithm for terahertz FMCW radar imaging Open
The terahertz frequency modulation continuous-wave (THz FMCW) imaging technology has been widely used in non-destructive testing applications. However, THz FMCW real-aperture radar usually has a small depth of field and poor lateral resolu…
View article: Accumulation Conditions and Pattern of Tight Oil in the Lower Submember of the Fourth Member of the Shahejie Formation in the Damintun Sag, Bohai Bay Basin
Accumulation Conditions and Pattern of Tight Oil in the Lower Submember of the Fourth Member of the Shahejie Formation in the Damintun Sag, Bohai Bay Basin Open
To determine the accumulation conditions and pattern of tight oil in oil shales in the Damintun Sag, Bohai Bay Basin, this study investigated the basic geological conditions of the source rocks and reservoirs in the sag using methods such …
View article: Simulation of Reheating Furnace for Steel Billets by a Meshless Method
Simulation of Reheating Furnace for Steel Billets by a Meshless Method Open
A simulation of reheating furnace in a steel production line where the steel billets are heated from room temperature up to 1200 ˚C, is carried out using a novel meshless solution procedure. The reheating of the steel billets before the co…
View article: Effect of Melatonin on Fruit Quality via Decay Inhibition and Enhancement of Antioxidative Enzyme Activities and Genes Expression of Two Mango Cultivars during Cold Storage
Effect of Melatonin on Fruit Quality via Decay Inhibition and Enhancement of Antioxidative Enzyme Activities and Genes Expression of Two Mango Cultivars during Cold Storage Open
The postharvest deterioration of mango fruits is a critical issue limiting mango storage and preservation due to its climacteric nature. This study evaluated the storage behavior of two mango cultivars and their response to exogenous melat…
View article: Deployment of On-Orbit Service Vehicles Using a Fuzzy Adaptive Particle Swarm Optimization Algorithm
Deployment of On-Orbit Service Vehicles Using a Fuzzy Adaptive Particle Swarm Optimization Algorithm Open
On the basis that satellites given fixed count and orbit elements can be served in bounded time when an on-orbit serving mission order is set at any uncertain time in a given time interval, the deployment of on-orbit service vehicle (OSV) …
View article: A fast computational method for the landing footprints of space-to-ground vehicles
A fast computational method for the landing footprints of space-to-ground vehicles Open
Fast computation of the landing footprint of a space-to- ground vehicle is a basic requirement for the deployment of parking orbits, as well as for enabling decision makers to develop real-time programs of transfer trajectories. In order t…
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Contents Open
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View article: Feasibility Study on Long-Term Continuous Ethanol Production from Cassava Supernatant by Immobilized Yeast Cells in Packed Bed Reactor
Feasibility Study on Long-Term Continuous Ethanol Production from Cassava Supernatant by Immobilized Yeast Cells in Packed Bed Reactor Open
In this study, yeast cell immobilization was carried out in a packed bed reactor (PBR) to investigate the effects of the volumetric capacity of carriers as well as the different fermentation modes on fuel ethanol production. An optimal vol…
View article: Multiattribute Group Decision-Making Method Using a Genetic <i>K</i>-Means Clustering Algorithm
Multiattribute Group Decision-Making Method Using a Genetic <i>K</i>-Means Clustering Algorithm Open
Multiattribute group decision-making (MAGDM) problems are characterized by the large number, uneven levels, and bounded rationality of decision-makers; multiple attributes and fuzziness of decision problems; and complex group behaviours. C…
View article: Fuel-Efficient on-Orbit Service Vehicle Allocation Based on an Improved Discrete Particle Swarm Optimization Algorithm
Fuel-Efficient on-Orbit Service Vehicle Allocation Based on an Improved Discrete Particle Swarm Optimization Algorithm Open
Given the limited fuel capacity of an on-orbit service vehicle (OSV), proper OSV allocation to satellites during each service mission is critical for economic fuel consumption. This allocation problem can be formulated as an optimization p…
View article: Improved Dispersion of Bacterial Cellulose Fibers for the Reinforcement of Paper Made from Recycled Fibers
Improved Dispersion of Bacterial Cellulose Fibers for the Reinforcement of Paper Made from Recycled Fibers Open
Bacterial cellulose (BC) can be used to improve the physical properties of paper. However, previous studies have showed that the effectiveness of this improvement is impaired by the agglomeration of the disintegrated BC fibers. Effective d…
View article: An Improved NSGA-III Algorithm Using Genetic K-Means Clustering Algorithm
An Improved NSGA-III Algorithm Using Genetic K-Means Clustering Algorithm Open
The non-dominated sorting genetic algorithm III (NSGA-III) has recently been proposed to solve many-objective optimization problems (MaOPs). While this algorithm achieves good diversity, its convergence is unsatisfactory. In order to impro…
View article: A Fast Computational Method for the Minimum Duration Transfer Trajectories of Space‐to‐Ground Vehicles
A Fast Computational Method for the Minimum Duration Transfer Trajectories of Space‐to‐Ground Vehicles Open
On the conditions that the spacecraft engine is in finite thrust mode and the maneuver time is given, it takes a long time to compute the minimum duration transfer trajectories of space‐to‐ground vehicles, which is mainly because the initi…
View article: Interception Orbit Optimization of Single on-Orbit Interceptor with Multiple Independently-Targeted Warheads Based on Artificial Immune Algorithm
Interception Orbit Optimization of Single on-Orbit Interceptor with Multiple Independently-Targeted Warheads Based on Artificial Immune Algorithm Open
Interception orbit of single on-orbit interceptor with multiple independently-targeted warheads is optimized by artificial immune algorithm (AIA) in this article. Firstly, interception orbit mathematical model of single on-orbit intercepto…
View article: Research on Application of Unity3D in Virtual Battlefield Environment
Research on Application of Unity3D in Virtual Battlefield Environment Open
Virtual battle environment is an important visible platform for combat simulation.There-dimensional scene simulation is a basic part of virtual battlefield environment.Researching on application of unity3D in virtual battlefield environmen…
View article: Recursive Configuration with Common Ground Tracks of LEO Satellite Constellations for Area Coverage
Recursive Configuration with Common Ground Tracks of LEO Satellite Constellations for Area Coverage Open
With the widely use of modern evolutionary algorithm in constellation configuration design for area coverage, the selection of basic configuration before the optimization is becoming more and more important.To design a good configuration s…
View article: Non-singular method of fundamental solutions for three–dimensional isotropic elasticity problems with displacement boundary conditions
Non-singular method of fundamental solutions for three–dimensional isotropic elasticity problems with displacement boundary conditions Open
The purpose of the present paper is to develop the Non-Singular Method of Fundamental Solutions (NMFS) based on the boundary-distributed source method for three-dimensional elasticity problems with displacement boundary conditions.In the N…