Low resistivity Ni/Ti/Al ohmic contacts on p-type 4H-SiC epilayer were developed, and their thermal stabilities also experimentally investigated through high temperature storage at 600 °C for 100 h. The contact resistance of the Al/Ti/Ni/SiC degraded in different degrees, morphology deteriorated with increases average surface roughness interface voids. X-ray spectra showed that Ni2Si Ti3SiC2, which formed during annealing contributed to low resistivity, stable under storage. existence TiAl3...

With the transformation of trend vehicle electrification, overall noise level in is gradually reduced. The problem low-frequency vehicle, which was previously ignored, becoming more and prominent. To solve problem, a combination real-vehicle tests simulation analysis carried out. During test, driver passengers feel that there relatively obvious roar car, results from structural radiation trunk door vibration. Therefore, to this we design an acoustic metamaterial with lightweight miniaturized...

The meticulously engineered powertrain mounting system of hybrid-electric vehicles plays a critical role in minimizing vehicle vibrations and noise, thereby enhancing the longevity vital components. However, developing designing such demands substantial time financial investments due to intricate analysis modeling requirements. To tackle this challenge, study integrates data-mining technology into design optimization processes mount system. research focuses on transverse four-cylinder...

The sound insulation performance of an electric vehicle’s body system serves as a critical metric for evaluating the noise, vibration, and harshness (NVH) quality vehicle. accurate efficient prediction is foundational undertaking noise reduction design optimization. Current engineering practices predominantly rely on Computer-Aided Engineering (CAE) methodologies to address this challenge. However, inherent shortcomings such low modeling efficiency difficulty in ensuring accuracy often...

Abstract Locally resonant acoustic metamaterials offer distinctive advantages in controlling low-frequency elastic waves. However, passive structures often face limitations due to narrow bandgaps and fixed working band once they are fabricated. This paper introduces a novel metamaterial beam with tunable bandgaps. achievement is made possible by employing one electromagnet three permanent magnets create an electromagnetic spring. The initial stiffness, provided the spiral beam, collaborates...

We present a kinetic model for the walking of myosin V on actin under conditions zero external force. The includes three pathways and termination processivity. Experimentally measured parameters are used in to obtain quantitative results. Using associated parameters, we compute proportion pathway containing an intermediate state, as well velocities run lengths at various concentrations ATP ADP. resulting trends agree with experimental data. explains surprising finding that walks faster speed...

This paper presents a summary of the optimization design process for multi-objective, two-level engineering problem, utilizing generalized inverse cascade method under uncertainty. The primary objective is to enhance vibration isolation performance mounting system, considering influence uncertain factors on its stiffness. focus determining value range variables at bottom layer, ensuring that goal met with specified confidence level. To illustrate application this methodology, powertrain...

Vehicle interior noise has emerged as a crucial assessment criterion for automotive NVH (Noise, Vibration, and Harshness). When analyzing the performance of vehicle body, traditional SEA (Statistical Energy Analysis) simulation technology is usually limited by accuracy material parameters obtained during acoustic package modeling limitations application conditions. In order to effectively solve these shortcomings, based on analysis transmission path, multi-level objective decomposition...

The meticulously engineered powertrain mounting system of hybrid electric vehicles plays a critical role in minimizing vehicle vibrations and noise, thereby enhancing the longevity vital components. However, developing designing such demands substantial time financial investments due to intricate analysis modeling requirements. To tackle this challenge, study integrates data mining technology into design optimization processes mount system. research focuses on transverse four-cylinder...

The acoustic performance of automotive micro-motors directly impacts the comfort and driving experience both drivers passengers. However, various motor production testing uncertainties can lead to noise fluctuations during operation. Thus, predicting operational range motors on line in advance becomes crucial for timely adjustments parameters process optimization. This paper introduces a prediction model based Multi-Branch Channel–Spatial Adaptive Weighting Strategy (MCSAWS). includes...

The NVH (Noise, Vibration, and Harshness) characteristics of micro-motors used in vehicles directly affect the comfort drivers passengers. However, various factors influence motor’s structural parameters, leading to uncertainties its performance. To improve characteristics, we propose a method for optimizing parameters automotive under uncertain conditions. This uses maximum magnetic flux as constraint aims reduce vibration at commutation frequency. Firstly, introduce Pareto ellipsoid...

Interior booming noise during acceleration has been one of the most significant NVH problems for minivans. However, generation mechanism interior remains unclear, so access to reduce is blocked. To solve problem, a Source‐Path‐Receiver‐Model‐based approach established study noise. Based on mechanism, several modifications are proposed minivan In approach, transfer path energy figured out by vehicle body and cavity experimental TPA, rear suspension dynamic analysis, drivetrain torsional...

The deployment of vehicle micro-motors has witnessed an expansion owing to the progression in electrification and intelligent technologies. However, some may exhibit design deficiencies, component wear, assembly errors, other imperfections that arise during or manufacturing phases. Consequently, these might generate anomalous noises their operation, consequently exerting a substantial adverse influence on overall comfort drivers passengers. Automobile diverse array structural variations,...

Low-toxicity tin halide perovskites (ASnX3) with excellent optoelectronic properties are attracting an increasing level of interest. Sn2+ oxidation to Sn4+ via forming Sn vacancies should promote the formation A2SnX6. The resulted Cs2SnCl6/CsSnCl3 hetero-interfaces can have significant influence on properties. Here, we performed first-principles calculations explore electronic and optical hetero-interfaces. Our results revealed that bandgap is significantly reduced due type-II band...

By leveraging efficient deposition-dissolution process at Sn anode and reversible solid-to-solid conversion of Ag to AgCl AgNWs/CNT hybrid cathode, the decoupled Sn–Ag cell design improves cycling stability in traditional Ag-based batteries.

The reducer serves as a pivotal component within the power transmission system of electric vehicles. On one hand, it bears torque load system. other also endures vibration transmitted from vehicle components. Over extended periods, these dynamic loads can cause fatigue damage to reducer. Therefore, reliability and durability during use are very important for In order save time economic costs, is often evaluated through accelerated testing. However, traditional approaches tests typically only...