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Ground-Target Recognition Method Based on Transfer Learning.
Sensors (Basel)
January 2025
College of Communication Engineering, Jilin University, Changchun 130012, China.
A moving ground-target recognition system can monitor suspicious activities of pedestrians and vehicles in key areas. Currently, most target recognition systems are based on devices such as fiber optics, radar, and vibration sensors. A system based on vibration sensors has the advantages of small size, low power consumption, strong concealment, easy installation, and low power consumption.
View Article and Find Full Text PDFEnhancing the Performance of Vibration Energy Harvesting Based on 2:1:2 Internal Resonance in Magnetically Coupled Oscillators.
Micromachines (Basel)
December 2024
Department of Applied Mechanics, FEMTO-ST Institute, CNRS, University of Franche-Comté, F-25000 Besançon, France.
An electromagnetic vibration energy harvester with a 2:1:2 internal resonance (IR) is proposed, allowing for the simultaneous activation of two IRs within the system in order to enhance its performance in terms of bandwidth and harvested power. The device consists of three magnetically coupled oscillators separated by an adjustable gap to tune the system eigenfrequencies and achieve a 2:1:2 IR. Numerical investigations are conducted to predict the behavior of the proposed device, and a multi-objective optimization procedure is employed to enhance the harvester's performance by introducing mass perturbations.
View Article and Find Full Text PDFModeling and Characterization of Multilayer Piezoelectric Stacks via Dynamic Stiffness Method.
Micromachines (Basel)
December 2024
GREMAN UMR 7347 CNRS, Université de Tours, INSA Centre Val de Loire, 3 Rue de la Chocolaterie, 41000 Blois, France.
Multilayer piezoelectric stacks, which are multiple layers of piezoelectric materials placed on top of each other, are widely used to achieve precise linear movement and high-force generation. In this paper, a dynamic stiffness (DS) method for the dynamic vibration analysis of multilayer piezoelectric stacks is presented. First, the general solutions for all physical quantities of the three vibration contributions (i.
View Article and Find Full Text PDFPlanar Two-Dimensional Vibration Isolator Based on Compliant Mechanisms.
Micromachines (Basel)
December 2024
School of Automotive and Mechanical Engineering, Changsha University of Science and Technology, Changsha 410114, China.
In practical engineering applications, the vibration is often generated in various directions and can be harmful to the engineering equipment. Thus, it is necessary to develop vibration isolators that can reduce vibration in multiple directions. In this paper, we propose a planar two-dimensional vibration isolator based on compliant mechanisms.
View Article and Find Full Text PDFDiscovery of SARS-CoV-2 Mpro inhibitors through rational design of novel fluorinated 1,3,4-oxadiazole amide derivatives: An in-silico study.
Chem Biodivers
January 2025
University of Shanghai for Science and Technology, Department of chemistry, No. 334, Jungong Road, Yangpu District, Shanghai, 200093, Shanghai, CHINA.
The main protease (Mpro) of SARS-CoV-2 is an evolutionarily conserved drug discovery target. The present study mainly focused on chemoinformatics computational methods to investigate the efficacy of our newly designed trifluoromethyl-1,3,4-oxadiazole amide derivatives as SARS-CoV-2 Mpro inhibitors. Drug-likeness ADMET analysis, molecular docking simulation, density functional theory (DFT) and molecular dynamics simulation methods were included.
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