Qidan Zhu
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View article: Artificial Texture-Free Measurement: A Graph Cuts-Based Stereo Vision for 3D Wave Reconstruction in Laboratory
Artificial Texture-Free Measurement: A Graph Cuts-Based Stereo Vision for 3D Wave Reconstruction in Laboratory Open
A novel method for three-dimensional (3D) wave reconstruction based on stereo vision is proposed to overcome the challenges of measuring water surfaces under laboratory conditions. Traditional methods, such as adding seed particles or proj…
View article: A DDQN-Guided Dual-Population Evolutionary Multitasking Framework for Constrained Multi-Objective Ship Berthing
A DDQN-Guided Dual-Population Evolutionary Multitasking Framework for Constrained Multi-Objective Ship Berthing Open
Autonomous ship berthing requires advanced path planning to balance multiple objectives, such as minimizing berthing time, reducing energy consumption, and ensuring safety under dynamic environmental constraints. However, traditional plann…
View article: An Improved Design of a Continuously Variable Transmission Based on Circumferentially Arranged Disks for Enhanced Efficiency in the Low Torque Region
An Improved Design of a Continuously Variable Transmission Based on Circumferentially Arranged Disks for Enhanced Efficiency in the Low Torque Region Open
A continuously variable transmission can improve the energy efficiency of actuators with rotary output by providing an optimum transmission ratio. A continuously variable transmission based on circumferentially arranged disks (CAD CVT) is …
View article: Quadcopter Trajectory Tracking Based on Model Predictive Path Integral Control and Neural Network
Quadcopter Trajectory Tracking Based on Model Predictive Path Integral Control and Neural Network Open
This paper aims to address the trajectory tracking problem of quadrotors under complex dynamic environments and significant fluctuations in system states. An adaptive trajectory tracking control method is proposed based on an improved Mode…
View article: The Path Tracking Control of Unmanned Surface Vehicles Based on an Improved Non-Dominated Sorting Genetic Algorithm II-Based Multi-Objective Nonlinear Model Predictive Control Method
The Path Tracking Control of Unmanned Surface Vehicles Based on an Improved Non-Dominated Sorting Genetic Algorithm II-Based Multi-Objective Nonlinear Model Predictive Control Method Open
This paper proposes a multi-objective nonlinear model predictive control (MOMPC) method based on an improved non-dominated sorting genetic algorithm II (NSGAII) for the path tracking problem of unmanned surface vehicles (USVs). To enhance …
View article: Single-Shot, Monochrome, Spatial Pixel-Encoded, Structured Light System for Determining Surface Orientations
Single-Shot, Monochrome, Spatial Pixel-Encoded, Structured Light System for Determining Surface Orientations Open
This study introduces a technique for determining surface orientations by projecting a monochrome, spatial pixel-encoded pattern and calculating the surface normals from single-shot measurement. Our method differs from traditional methods,…
View article: A Chinese Continuous Sign Language Dataset Based on Complex Environments
A Chinese Continuous Sign Language Dataset Based on Complex Environments Open
The current bottleneck in continuous sign language recognition (CSLR) research lies in the fact that most publicly available datasets are limited to laboratory environments or television program recordings, resulting in a single background…
View article: Sequential Convex Programming for Nonlinear Optimal Control in UAV Trajectory Planning
Sequential Convex Programming for Nonlinear Optimal Control in UAV Trajectory Planning Open
In this paper, an algorithm is proposed to solve the non-convex optimization problem using sequential convex programming. An approximation method was used to solve the collision avoidance constraint. An iterative approach was utilized to e…
View article: A Novel Continuously Variable Transmission with Circumferentially Arranged Disks (CAD CVT)
A Novel Continuously Variable Transmission with Circumferentially Arranged Disks (CAD CVT) Open
This paper presents a novel Continuous Variable Transmission (CVT) design. CVT is highly beneficial for actuators with rotary output as it can improve the energy efficiency of the actuators by providing an optimum transmission ratio. This …
View article: Numerical Simulation of Ship-added Resistance Based on a Numerical Wave Tank
Numerical Simulation of Ship-added Resistance Based on a Numerical Wave Tank Open
The wave resistance increase of a ship during its actual voyage can affect its speed and safety. To design ships with excellent sailing performance, it is necessary to accurately predict the wave resistance increase of a ship in waves, as …
View article: Quadcopter Trajectory Tracking Control Based on Flatness Model Predictive Control and Neural Network
Quadcopter Trajectory Tracking Control Based on Flatness Model Predictive Control and Neural Network Open
In this paper, a novel control architecture is proposed in which FMPC couples feedback from model predictive control with feedforward linearization. The proposed approach has the computational advantage of only requiring a convex quadratic…
View article: Continuous Sign Language Recognition Based on Motor attention mechanism and frame-level Self-distillation
Continuous Sign Language Recognition Based on Motor attention mechanism and frame-level Self-distillation Open
Changes in facial expression, head movement, body movement and gesture movement are remarkable cues in sign language recognition, and most of the current continuous sign language recognition(CSLR) research methods mainly focus on static im…
View article: Research on Intelligent Temperature Control Method of Closed-Loop Cooling System Based on Deep Q-Network
Research on Intelligent Temperature Control Method of Closed-Loop Cooling System Based on Deep Q-Network Open
View article: Fully 2D Convolutional Network for Continuous Sign Language Recognition
Fully 2D Convolutional Network for Continuous Sign Language Recognition Open
In continuous sign language recognition (CSLR) models based on deep learning, hierarchical models are more favored by researchers compared to non-hierarchical models due to their simple model, fewer parameters, and clear hierarchy. In the …
View article: Single-Shot, Pixel-Encoded Strip Patterns for High-Resolution 3D Measurement
Single-Shot, Pixel-Encoded Strip Patterns for High-Resolution 3D Measurement Open
In this research, we combined two distinct, structured light methods, the single-shot pseudo-random sequence-based approach and the time-multiplexing stripe indexing method. As a result, the measurement resolution of the single-shot, spati…
View article: Continuous sign language recognition based on cross-resolution knowledge distillation
Continuous sign language recognition based on cross-resolution knowledge distillation Open
The goal of continuous sign language recognition(CSLR) research is to apply CSLR models as a communication tool in real life, and the real-time requirement of the models is important. In this paper, we address the model real-time problem t…
View article: Elman Neural Network‐Based Direct Lift Automatic Carrier Landing Nonsingular Terminal Sliding Mode Fault‐Tolerant Control System Design
Elman Neural Network‐Based Direct Lift Automatic Carrier Landing Nonsingular Terminal Sliding Mode Fault‐Tolerant Control System Design Open
The purpose of this paper is to develop the control system using the Elman neural network (ENN) and nonsingular terminal sliding mode control (NTSMC) to improve the automatic landing capability of carrier‐based aircraft based on direct lif…
View article: Temporal superimposed crossover module for effective continuous sign language
Temporal superimposed crossover module for effective continuous sign language Open
The ultimate goal of continuous sign language recognition(CSLR) is to facilitate the communication between special people and normal people, which requires a certain degree of real-time and deploy-ability of the model. However, in the prev…
View article: Continuous Sign Language Recognition via Temporal Super-Resolution Network
Continuous Sign Language Recognition via Temporal Super-Resolution Network Open
Aiming at the problem that the spatial-temporal hierarchical continuous sign language recognition model based on deep learning has a large amount of computation, which limits the real-time application of the model, this paper proposes a te…
View article: Multi-scale temporal network for continuous sign language recognition
Multi-scale temporal network for continuous sign language recognition Open
Continuous Sign Language Recognition (CSLR) is a challenging research task due to the lack of accurate annotation on the temporal sequence of sign language data. The recent popular usage is a hybrid model based on "CNN + RNN" for CSLR. How…
View article: Image denoising algorithm of social network based on multifeature fusion
Image denoising algorithm of social network based on multifeature fusion Open
A social network image denoising algorithm based on multifeature fusion is proposed. Based on the multifeature fusion theory, the process of social network image denoising is regarded as the fitting process of neural network, and a simple …
View article: Edge detail enhancement algorithm for high-dynamic range images
Edge detail enhancement algorithm for high-dynamic range images Open
Existing image enhancement methods have problems of a slow data transmission and poor conversion effect, resulting in a low image-recognition rate and recognition efficiency. To solve these problems and improve the recognition accuracy and…
View article: Fuzzy-based adaptive asymptotic tracking control design for uncertain MIMO nonlinear systems with state constraints
Fuzzy-based adaptive asymptotic tracking control design for uncertain MIMO nonlinear systems with state constraints Open
This article concentrates on designing an adaptive fuzzy asymptotic tracking control strategy for uncertain multi-input and multi-output (MIMO) nonlinear systems with state constraints and unknown virtual control coefficients (UVCCs). Such…
View article: An Ameliorated Harmony Search Algorithm With Hybrid Convergence Mechanism
An Ameliorated Harmony Search Algorithm With Hybrid Convergence Mechanism Open
The metaheuristic optimization algorithm Harmony search (HS), which imitates the process of music improvisation, is becoming widely used due to its simplicity and easy operation. However, the basic HS has shortcomings of low optimization a…
View article: Adaptive fuzzy control for uncertain switched nonlinear time-delay systems with state constraints
Adaptive fuzzy control for uncertain switched nonlinear time-delay systems with state constraints Open
In this paper, an adaptive fuzzy control strategy is proposed for uncertain switched nonlinear time-delay systems with state constraints. All system states are guaranteed to maintain the prescribed regions whereby barrier Lyapunov function…
View article: Ship Route Planning Based on Double-Cycling Genetic Algorithm Considering Ship Maneuverability Constraint
Ship Route Planning Based on Double-Cycling Genetic Algorithm Considering Ship Maneuverability Constraint Open
In order to complete automatic route planning in the complex navigation environment, this paper proposes a quadratic optimization genetic algorithm combining the motion characteristics of the ships. Furthermore, the constraints of the mane…
View article: A Single-Shot, Pixel Encoded 3D Measurement Technique for Structure Light
A Single-Shot, Pixel Encoded 3D Measurement Technique for Structure Light Open
The Structure Light System (SLS) is a general concept and it is one of the cheapest methods for the non-contact-based 3D reconstruction. The existing single-shot SLS which is primarily based on the spatial encoding techniques are not optim…
View article: Dual manipulator system calibration based on virtual constraints
Dual manipulator system calibration based on virtual constraints Open
Calibration is necessary for dual manipulator to complete operational tasks. This paper proposes an effective robot-robot and hand-eye calibration method based on virtual constraints. Firstly, a rotational error model and a translational e…
View article: Launch Bar Dynamics Character Analysis of Carrier-Based Aircraft Catapult Launch
Launch Bar Dynamics Character Analysis of Carrier-Based Aircraft Catapult Launch Open
The launch bar is a unique device of carrier-based aircraft, which is connected to the nose gear and shuttle. In order to avoid the launch bar striking the flight deck after the launch bar pops out of the shuttle, it is very important to r…
View article: Efficient learning variable impedance control for industrial robots
Efficient learning variable impedance control for industrial robots Open
Compared with the robots, humans can learn to perform various contact tasks in unstructured environments by modulating arm impedance characteristics. In this article, we consider endowing this compliant ability to the industrial robots to …