A three-dimensional vehicle-track coupled dynamics model, with the inclusion of axle-box bearings, has been developed, which considers coupling effects between bearing and vehicle components. Some non-linear factors, such as time-varying stiffness, clearance, wheel-polygonal wear wheel-rail contact forces, are also considered. Dynamic analysis implemented through numerical simulations that consider different amplitudes harmonic orders measured idealised polygonal wheel wear. Both model...

The Axle-box bearing (ABB) is a key component in the high-speed train which suffers multiple stochastic excitations realistic working conditions. ABB's health status crucial for reliable and safe operation of rolling stock. This paper proposes novel vehicle–track coupled model to evaluate dynamic performance ABBs with unsteady wind load random track irregularities. nonlinear stiffness unsmooth nonlinearities clearances are properly considered based on Hertzian contact theory. von Karman...

We present an experimental study of investors' willingness to pay for socially responsible assets. design initial public offering experiment in which various assets may be issued with identical financial risk and return profile but different intensity timing social responsibility: the expected benefit high or low, occur when payoff is good bad. The represented by a donation charity that realized only if asset issued. In experiment, individuals attribute positive value responsibility at...

To improve vehicle fuel economy whilst enhancing road handling and ride comfort, power generating suspension systems have recently attracted increased attention in automotive engineering. This paper presents our study of a regenerative hydraulic shock absorber system which converts the oscillatory motion into unidirectional rotary generator. Firstly model takes account influences dynamics flow, rotational regeneration is developed. Thereafter parameters fluid bulk modulus, motor...

Interstitial fibrosis is a typical feature of all progressive renal diseases. The process frequently coupled with the presence pro‑fibrotic factors and inflammation. Naringin dihydroflavone compound that has been previously reported to exhibit anti‑fibrotic effects in liver, where it prevents oxidative damage. In present study, rat model interstitial cell were established evaluate naringin on inflammatory proteins markers kidney rats NRK‑52E cells, elucidate role TGF‑β/Smad signaling pathway...

Canine distemper virus (CDV) is a highly contagious that causes multi-systemic, sub-clinical to fatal diseases in wide range of carnivore species. Based on the sequences haemagglutinin (H) gene, CDV strains have been classified into 18 major genetic lineages. In this study, we characterized genomes isolated from lungs two dead red pandas China. Histopathological and immunohistochemical analyses revealed damage due viral infection these lungs. The showed deep distance other recognized...

The advancement and performance enhancement of electric aircraft are significantly influenced by the efficiency reliability lithium-ion batteries. Battery inconsistency can lead to degradation battery life poses risks such as fire or explosion. This imbalance is critical, especially in fast-charging storage systems. While both balancing functions vital, achieving simultaneously remains challenging. paper addresses two primary technical challenges associated with batteries applications:...

Abstract The field of optimization problems has garnered significant attention due to its importance across various appli-cations, particularly driven by the demand for efficient solutions complex engineering challenges. Numerous metaheuristic algorithms inspired animal behaviour or swarm intelligence have been proposed; however, these often pursue a multitude strategies, resulting in excessive parameters that complicate tuning and hinder convergence balance. Additionally, based on human...

The quality of laser cladding is strongly influenced by process parameters, which interact in complex and often nonlinear ways. existing literature primarily focuses on the influence parameters surface properties. However, limited research has explored relationship between properties, their optimization. To bridge this gap, study introduces a novel parameter modeling optimization approach using Catch Fish Optimization Algorithm (CFOA). Key including power, scanning speed, powder feeding...

Goose astroviruses (GoAstVs) are causative agents that account for fatal infection of goslings characterized by visceral urate deposition, resulting in severe economic losses major goose-producing regions China since 2017. In this study, we sought to unravel the intrinsic properties associated with adaptation and evolution host environment GoAstVs. Consistent results from phylogenetic analysis correspondence performed on codon usage patterns (CUPs) reveal 2 clusters GoAstVs, namely, GoAstV-1...

The occurrence of an axlebox bearing ring raceway defect is inevitable and commonly observed phenomenon in railway wheels. It not only leads to surface damage but also poses the potential threat further degradation, thereby increasing risks associated with running safety maintenance costs. Hence, it becomes imperative detect defects at early stage mitigate hazards reduce efforts. In this study, focus lies investigating effectiveness vibration-based detection techniques for identifying...

Wheel/rail interaction modelling is pronouncedly critical in characterising the frictional contact behaviours which immediately causes vehicle-track coupled vibrations and wheel/rail surface wear damage. Kalker's complete theory that programmed as CONTACT has been widely used to examine modelling, nevertheless, form of static aspect most existing studies. The main motivation this study compare on-line application Hertzian, non-Hertzian models interactions long-term wheel tread evolution with...