44 Result(s)
within
DongDong Wang
Engineering
-
Article
Frequency convergence characteristics of lumped mass Galerkin meshfree methods
Due to the considerable complexity of meshfree approximants, there still lacks a rational theoretical estimate on the frequency accuracy of lumped mass meshfree methods. In this study, a detailed theoretical a...
-
Article
5G Integrated User Downlink Adaptive Transmission Scheme for Low Earth Orbit Satellite Internet Access Network
After the low-earth orbit (LEO) satellite Internet has gone through the two stages of competing with the terrestrial network and supplementing the terrestrial network, it has begun to enter the third stage of ...
-
Article
An aspect ratio dependent lumped mass formulation for serendipity finite elements with severe side-length discrepancy
The frequency solutions of finite elements may significantly deteriorate as the mesh aspect ratios become large, which implies a severe element side-length discrepancy. In this work, an aspect ratio dependent ...
-
Chapter and Conference Paper
Research Progress of MXenes Based Gas Sensors
MXenes not only have the same conductivity as metals, but also have good mechanical and hydrophilic properties. Therefore, MXenes have special appeal and competitiveness in fields such as energy storage conver...
-
Chapter and Conference Paper
Application of Manganese Based Catalysts for VOCs Degradation: A Review
In this paper, catalytic combustion of volatile organic compounds (toluene, ethyl acetate and acetaldehyde) was reviewed over manganese based catalysts and over the catalytic combustion mechanism. At present, ...
-
Chapter and Conference Paper
Analysis and Experimental Verification of Contact Characteristics Between Armature and Rail Based on Dual Parameter Changes
In the process of electromagnetic launching, in order to address the issue of varying degrees of sliding electrical contact erosion caused by different contact areas, when the armature mass is fixed, a dual pa...
-
Chapter and Conference Paper
RSTS-YOLOv5: An Improved Object Detector for Drone-Captured Images
Despite the tremendous progress in object detection in recent years, object detection on drone-captured images is still a great challenge because of the large number of small objects that appear densely and ob...
-
Chapter and Conference Paper
System Design of Sports Video Based on Improved SSA-LSSVM Model
The sports video analysis system is an important technical means that can help coaches and athletes better understand the competition situation and personal performance, thereby improving training effectivenes...
-
Chapter and Conference Paper
Analysis of Multiple Field Coupling Conditions of Rail Gun Arc Suppressor
The arc suppressor can effectively eliminate the residual electric energy at the end of launch, and improve the ablation resistance of rail. Because of the arc suppressor mainly bears the action of electromag...
-
Chapter and Conference Paper
3D Reconstruction Method of Metal Pipe Inner Wall Based on Multi-camera Sequential Image Acquisition
This paper presents a system and solution for image acquisition and 3D reconstruction of the inner wall of metal pipes. The difficulties of multi-camera illumination and image acquisition of the inner wall of ...
-
Article
Random Access Control and Beam Management Scheme for the 5G NR based Beam Hop** LEO Satellite Communication Systems
This paper considers the scenario that the Low Earth Orbit (LEO) satellite based on Ka-band uses the agile beam to provide Internet access services for users, and studies the random access control and resource...
-
Article
A frequency error estimation for isogeometric analysis of Kirchhoff–Love cylindrical shells
A frequency error estimation is presented for the isogeometric free vibration analysis of Kirchhoff–Love cylindrical shells using both quadratic and cubic basis functions. By analyzing the discrete isogeometri...
-
Article
Open AccessCoarse Mesh Superconvergence in Isogeometric Frequency Analysis of Mindlin–Reissner Plates with Reduced Integration and Quadratic Splines
A frequency accuracy study is presented for the isogeometric free vibration analysis of Mindlin–Reissner plates using reduced integration and quadratic splines, which reveals an interesting coarse mesh superco...
-
Article
Open AccessA coarse-to-fine cascade deep learning neural network for segmenting cerebral aneurysms in time-of-flight magnetic resonance angiography
Accurate segmentation of unruptured cerebral aneurysms (UCAs) is essential to treatment planning and rupture risk assessment. Currently, three-dimensional time-of-flight magnetic resonance angiography (3D TOF-...
-
Article
A unified reproducing kernel gradient smoothing Galerkin meshfree approach to strain gradient elasticity
A unified reproducing kernel gradient smoothing formulation is presented for efficient Galerkin meshfree analysis of strain gradient elasticity problems with particular reference to high order basis functions,...
-
Article
A least squares recursive gradient meshfree collocation method for superconvergent structural vibration analysis
A least squares recursive gradient meshfree collocation method is proposed for the superconvergent computation of structural vibration frequencies. The proposed approach employs the recursive gradients of mesh...
-
Article
A Petrov–Galerkin finite element-meshfree formulation for multi-dimensional fractional diffusion equations
Meshfree methods with arbitrary order smooth approximation are very attractive for accurate numerical modeling of fractional differential equations, especially for multi-dimensional problems. However, the non-...
-
Article
Arbitrary order recursive formulation of meshfree gradients with application to superconvergent collocation analysis of Kirchhoff plates
A general arbitrary order recursive gradient formulation is presented for meshfree approximation. According to this method, an nth order recursive meshfree gradient is formulated as an interpolation of the (n − 1...
-
Article
An efficient gradient smoothing meshfree formulation for the fourth-order phase field modeling of brittle fracture
A reproducing kernel gradient smoothing meshfree formulation is proposed for the fourth-order phase field modeling of brittle fracture. In order to circumvent the complexity and lower efficiency of meshfree gr...
-
Chapter and Conference Paper
Neural Network Based Adaptive Backstep** Control of Uncertain Flexible Joint Robot Systems
For flexible joint (FJ) robotic systems with uncertainties, a command filter based backstep** control is proposed in this paper. Through the control scheme, an adaptive controller is constructed to track des...
