Guowei Yu
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View article: CPD-YOLO: A cross-platform detection method for cotton pests and diseases using UAV and smartphone imaging
CPD-YOLO: A cross-platform detection method for cotton pests and diseases using UAV and smartphone imaging Open
View article: The problem of infinite Spin for parabolic and collision solutions in the planar $n$-body problem
The problem of infinite Spin for parabolic and collision solutions in the planar $n$-body problem Open
In the planar $n$-body problem, the problem of infinite spin occurs for both parabolic and collision solutions. Recently Moeckel and Montgomery \cite{MM25} showed that there is no infinite spin for total collision solutions, when the reduc…
View article: Optical Observation Method for Space Debris Based on a Tethered Balloon Platform
Optical Observation Method for Space Debris Based on a Tethered Balloon Platform Open
View article: An Innovative Variant Based on Generative Adversarial Network (Gan): Regression Gan Combined with Hyperspectral Imaging to Predict Pesticide Residue Content of Hami Melon
An Innovative Variant Based on Generative Adversarial Network (Gan): Regression Gan Combined with Hyperspectral Imaging to Predict Pesticide Residue Content of Hami Melon Open
View article: Wellbore-heat-transfer-model-based optimization and control for cooling downhole drilling fluid
Wellbore-heat-transfer-model-based optimization and control for cooling downhole drilling fluid Open
To address the two critical issues of evaluating the necessity of implementing cooling techniques and achieving real-time temperature control of drilling fluids underground in the current drilling fluid cooling technology, we first establi…
View article: A symplectic dynamics approach to the spatial isosceles three-body problem
A symplectic dynamics approach to the spatial isosceles three-body problem Open
We study the spatial isosceles three-body problem from the perspective of Symplectic Dynamics. For certain choices of mass ratio, angular momentum, and energy, the dynamics on the energy surface is equivalent to a Reeb flow on the tight th…
View article: Detecting different pesticide residues on Hami melon surface using hyperspectral imaging combined with 1D-CNN and information fusion
Detecting different pesticide residues on Hami melon surface using hyperspectral imaging combined with 1D-CNN and information fusion Open
Efficient, rapid, and non-destructive detection of pesticide residues in fruits and vegetables is essential for food safety. The visible/near infrared (VNIR) and short-wave infrared (SWIR) hyperspectral imaging (HSI) systems were used to d…
View article: Non-Destructive Detection of Different Pesticide Residues on the Surface of Hami Melon Classification Based on tHBA-ELM Algorithm and SWIR Hyperspectral Imaging
Non-Destructive Detection of Different Pesticide Residues on the Surface of Hami Melon Classification Based on tHBA-ELM Algorithm and SWIR Hyperspectral Imaging Open
In the field of safety detection of fruits and vegetables, how to conduct non-destructive detection of pesticide residues is still a pressing problem to be solved. In response to the high cost and destructive nature of existing chemical de…
View article: Multiscale Deepspectra Network: Detection of Pyrethroid Pesticide Residues on the Hami Melon
Multiscale Deepspectra Network: Detection of Pyrethroid Pesticide Residues on the Hami Melon Open
The problem of pyrethroid residues has become a topical issue, posing a potential food safety concern. Pyrethroid pesticides are widely used to prevent and combat pests in Hami melon cultivation. Due to its high sensitivity and accuracy, g…
View article: Discrimination of Pesticide Residue Levels on the Hami Melon Surface Using Multiscale Convolution
Discrimination of Pesticide Residue Levels on the Hami Melon Surface Using Multiscale Convolution Open
Pesticide residues directly or indirectly threaten the health of humans and animals. We need a rapid and nondestructive method for the safety evaluation of fruits. In this study, the feasibility of visible/near-infrared (Vis/NIR) spectrosc…
View article: Hyperbolic and Bi-hyperbolic solutions in the planar restricted $(N+1)$-body problem
Hyperbolic and Bi-hyperbolic solutions in the planar restricted $(N+1)$-body problem Open
Consider the planar restricted $(N+1)$-body problem with trajectories of the $N(\ge 2)$ primaries forming a collision-free periodic solution of the $N$-body problem, for any positive energy $h$ and directions $θ_{\pm} \in [0, 2π)$, we prov…
View article: Research Progress on External Quality Detection and Classification Technology of Jujube Based on Machine Vision
Research Progress on External Quality Detection and Classification Technology of Jujube Based on Machine Vision Open
In recent years, machine vision technology, which is fast, accurate, objective and nondestructive, has been widely used in the external quality detection of agricultural products to solve the problems of high cost and low efficiency in man…
View article: Regularizable collinear periodic solutions in the $n$-body problem with arbitrary masses
Regularizable collinear periodic solutions in the $n$-body problem with arbitrary masses Open
For $n$-body problem with arbitrary positive masses, we prove there are regularizable collinear periodic solutions for any ordering of the masses, going from a simultaneous binary collision to another in half of a period with half of the m…
View article: Detecting Starch-Head and Mildewed Fruit in Dried Hami Jujubes Using Visible/Near-Infrared Spectroscopy Combined with MRSA-SVM and Oversampling
Detecting Starch-Head and Mildewed Fruit in Dried Hami Jujubes Using Visible/Near-Infrared Spectroscopy Combined with MRSA-SVM and Oversampling Open
Dried Hami jujube has great commercial and nutritional value. Starch-head and mildewed fruit are defective jujubes that pose a threat to consumer health. A novel method for detecting starch-head and mildewed fruit in dried Hami jujubes wit…
View article: Analysis of the Wear Mechanism of High-Speed Transmission and the Prediction Model
Analysis of the Wear Mechanism of High-Speed Transmission and the Prediction Model Open
Wear is an important factor that determines the normal functioning of high-speed transmission. This study aimed to analyze the stress distribution of high-speed transmission using finite element software and the principle of wear reliabili…
View article: Global Surfaces of Section and Periodic Orbits in The Spatial Isosceles Three Body Problem
Global Surfaces of Section and Periodic Orbits in The Spatial Isosceles Three Body Problem Open
We study the spatial isosceles three body problem, which is a system with two degrees of freedom after modulo the rotation symmetry. For certain choices of energy and angular momentum, we find some disk-like global surfaces of section with…
View article: Moisture content assessment of dried Hami jujube using image colour analysis
Moisture content assessment of dried Hami jujube using image colour analysis Open
To investigate the feasibility of image colour information in predicting the moisture content of dried Hami jujube, the images were obtained under different colour space models, and the colour model component mean and chromaticity frequenc…
View article: Evaluation of surface texture of dried Hami Jujube using optimized support vector machine based on visual features fusion
Evaluation of surface texture of dried Hami Jujube using optimized support vector machine based on visual features fusion Open