Latest Publications & Patents on Kinematics
This is our latest selection of worldwide publications and patents in english on Kinematics, between many scientific online journals, classified and focused on kinematic, relative velocity, relative acceleration, trajectory, trajectories, Chebychev, Kutzbach, free fall, angular velocity, angular acceleration, projectile motion, average velocity and average acceleration.
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Identification and Analysis of Wind Shear Within the Transiting Frontal System at Xining International Airport Using Lidar
Published on 2025-02-20 by Shijun Zhao, Chao Yang, Yulong Shan, Fei Zhu @MDPI
Abstract: The principal factor contributing to the restricted accuracy of wind shear detection resides in the rapid oscillations of the wind field and the intricate characteristics of wind shear. The abrupt alterations in wind speed and direction over a short span pose a formidable challenge for conventional detection techniques to precisely capture and expeditiously analyze this phenomenon. In this study, three algorithms were employed to analyze wind shear within the frontal system at Xining Internation[...]
Our summary: Identification and analysis of wind shear using Lidar at Xining International Airport. Three algorithms employed for detection. All algorithms capture general trend of wind shear fluctuations.
Lidar, Wind Shear, Algorithms, Xining International Airport
Publication
Robust Regression and Redundant Measurement Noise Estimation Adaptive Filtering for Localization in Urban Environments
Published on 2025-02-20 by Li Zha, Hai Zhang, Aiping Wang, Cancan Tao @MDPI
Abstract: This paper focuses on a solution of target self-positioning when a Global Navigation Satellite System (GNSS) is denied. It is composed of Inertial Navigation Systems (INS), Signals of Opportunities (SOPs), and a navigation prototype. One of the options for navigation via SOP (NAVSOP) is to utilize cellular signals, such as Long Time Evolution (LTE). When the prior information is insufficient, the location of the base station (BS) is obtained by collecting the demodulation of the downlink signal,[...]
Our summary: Solution for target self-positioning in urban environments using INS, SOPs, and NAVSOP with LTE signals, introducing robust regression and RMNCE for improved accuracy, validated through simulation and vehicle test.
Robust Regression, Redundant Measurement Noise Estimation, Adaptive Filtering, Localization
Publication
Formation Mechanism and Motion Characteristics of Multiple Jets in Spherical Section Free Surface Electrospinning
Published on 2025-02-19 by Jing Yin, Lan Xu @MDPI
Abstract: In this study, during the efficient preparation of nanofibers using a spherical section free surface electrospinning (SSFSE) device with different sphere radii, the formation mechanism and motion characteristics of multiple jets were thoroughly investigated through the numerical simulation method. The mechanical model of multiple jets was established, and the key role of electric field intensity in the formation and motion of jets was defined; in addition, the relationship between the jet initia[...]
Our summary: Investigation of multiple jets formation and motion in spherical section free surface electrospinning through numerical simulation. Establishment of mechanical model and key role of electric field intensity. Determination of optimal device for efficient nanofiber preparation.
Formation Mechanism, Motion Characteristics, Spherical Section, Free Surface
Publication
Path Navigation for Multi-Agent Flight System Based on Distributed Model Predictive Control and Reinforcement Learning
Published on 2025-02-19 by Chao Kang, Jihui Xu, Yuan Bian, Wenjie Tian @MDPI
Abstract: The continuous change in formation configurations offers significant potential for formation flight. However, existing methods neglect the potential of autonomous navigation and learning ability based on environmental conditions, which would limit scalability for large formations to some extent. To address this, this paper presents an integrated framework that incorporates an innovative policy for configuration learning into multi-agent flight systems. Firstly, a decoupled trajectory optimizatio[...]
Our summary: Path navigation for multi-agent flight system incorporating distributed model predictive control and reinforcement learning to improve formation flight adaptability and obstacle avoidance. Decoupled trajectory optimization model, stage cost function, and configuration learning strategy are proposed for enhanced adaptability in constrained scenarios. Simulation results show improved success rate and obstacle avoidance compared to traditional methods.
navigation, multi-agent flight system, distributed model predictive control, reinforcement learning
Publication
A Dynamic Trajectory Temporal Density Model for Analyzing Maritime Traffic Patterns
Published on 2025-02-19 by Dapeng Jiang, Guoyou Shi, Lin Ma, Weifeng Li, Xinjian Wang, Guibing Zhu @MDPI
Abstract: This study investigates the spatiotemporal density aggregation and pattern distribution of vessel traffic amidst bustling maritime logistics scenarios. Firstly, a relatively new spatiotemporal segmentation and reconstruction method is proposed for ship AIS trajectories to address trajectory disruptions caused by berthing, anchorage, and other factors. Subsequently, a trajectory filtering algorithm utilizing time window panning is introduced to mitigate position jumps and deviation errors in traj[...]
Our summary: This study presents a novel dynamic trajectory temporal density model for analyzing maritime traffic patterns, utilizing spatiotemporal segmentation and reconstruction methods, trajectory filtering algorithms, and spatial gridding techniques. A case study demonstrates the effectiveness of the proposed method in identifying spatiotemporal patterns and density aggregation states in maritime traffic.
dynamic trajectory, temporal density model, maritime traffic, spatiotemporal patterns
Publication
Flow Characteristics and Loss Mechanism of Tip Leakage Flow in Mining Contra-Rotating Axial Flow Fan
Published on 2025-02-19 by Yongping Chen, Ronghua Liu, Wenqing Peng, Shiqiang Chen @MDPI
Abstract: Tip leakage flow interacts with the mainstream, impacting the energy transmission process within the impeller of the fan and causing a significant flow loss. Understanding the flow characteristics within the impeller is a prerequisite and foundation for achieving efficient operation of the fan. Therefore, numerical simulations and experimental methods were employed to obtain the internal flow field of the mining counter-rotating axial flow fan, and the influence of flow rate on the tip leakage f[...]
Our summary: Understanding tip leakage flow in mining axial flow fan is crucial for efficient operation. Numerical simulations and experiments reveal flow patterns and energy loss mechanisms. Flow rate influences tip leakage flow pattern and energy loss in the impeller.
Tip leakage flow, axial flow fan, flow characteristics, energy loss
Publication
Hinge and foldable device
Patent published on the 2025-02-19 in EP under Ref EP4509733 by HUAWEI TECH CO LTD [CN] (Li Kaixu [cn], Xiao Zhenlin [cn], Zhong Ding [cn], Fan Wen [cn])
Abstract: This application provides a hinge and a foldable device, and relates to the field of electronic device technologies, to resolve problems of a complex structure and poor stability of a hinge. The hinge provided in this application includes a main shaft, a first folding component, and a second folding component. The first folding component and the second folding component are symmetrically disposed on two sides of the main shaft. The first folding component and the second folding component can rot[...]
Our summary: Hinge and foldable device application with a simple structure and increased stability through arc-shaped surfaces, resolving complex structure issues.
hinge, foldable device, electronic device technologies, stability
Patent
Mixed reality batting system
Patent published on the 2025-02-13 in WO under Ref WO2025035047 by BATTING CHALLENGE HOLDINGS INC [US] (Farrell Matthew J [us], Stark Timothy Kyle [us])
Abstract: A method of processing a swing in a batting simulator, including providing batting simulator system having a bat, a ball, a batter's box, two or more sensors configured to detect a trajectory and an exit velocity of the ball traveling past a predetermined position, and a controller which is arranged in signal communication with the two or more sensors. The method further including receiving, by the controller, an execution metric, a batter difficulty setting, the trajectory and the exit velocity[...]
Our summary: Method of processing swing in batting simulator using sensors to detect ball trajectory and exit velocity, controller receiving metrics and outputting swing success metric.
batting simulator, mixed reality, sensors, controller
Patent
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