Huazhong University of Science and technology (HUST) is a key research-based comprehensive university in Wuhan, China,under the direct supervision of the Ministry of Education of China. Renowned as the epitome of the ...
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Huazhong University of Science and technology (HUST) is a key research-based comprehensive university in Wuhan, China,under the direct supervision of the Ministry of Education of China. Renowned as the epitome of the development of higher education in new China, it is a “211” Project,“985” Project,“Double First-Class” university in China.
With the continuous development of science and technology in the world today, artificial intelligence is increasingly used in modern mechanicalengineering. In some mechanical design projects, artificial intelligence ...
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Accurately estimating the battery state of health（SOH） is essential for ensuring the safe and reliable operation of battery systems of electric ***,due to the complex and variable operating conditions encountered in...
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Accurately estimating the battery state of health（SOH） is essential for ensuring the safe and reliable operation of battery systems of electric ***,due to the complex and variable operating conditions encountered in practical applications,achieving precise and physics-informed SOH estimation remains *** address these problems,this paper develops a lightweight two-stage physicsinformed neural network（TSPINN） method for SOH estimation of lithium-ion batteries with different ***,this paper utilizes firstly relaxation voltage data obtained after a full charge to determine the aging-related parameters of physical equivalent circuit model（ECM）.Additionally,incremental capacity（IC） feature is extracted by analyzing peak values of the IC curve during the charging phase,which thereby constitutes the first stage of the proposed TSPINN,termed as physics-informed data augmentation for SOH ***,the physical information can be further embedded by incorporating feature knowledge related to mechanisms into the loss function,and ultimately,the second stage of the proposed TSPINN is developed,which is named the physics-informed loss *** effectiveness of the TSPINN method was confirmed through the experimental data for LiNi0.86Co0.11Al0.03O2（NCA） and LiNi0.83Co0.11Mn0.07O2（NCM） battery materials under different temperature *** final experimental results indicate that the TSPINN method achieved SOH estimation with a mean absolute error（MAE） of 0.675%,showing improvements of approximately 29.3%,60.3%,and 8.1% compared to methods using only ECM,IC,and integrated features,*** results validate the effectiveness and adaptability of TSPINN,establishing it as a reliable solution for advanced battery management systems.
Considering their affordability and high strength-to-weight ratio,lightweight aluminium alloys are the subject of intensive research aimed at improving their properties for use in the aerospace *** research effort aim...
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Considering their affordability and high strength-to-weight ratio,lightweight aluminium alloys are the subject of intensive research aimed at improving their properties for use in the aerospace *** research effort aims to develop novel hybrid composites based on AA 2014 alloy through the use of liquid metallurgy stir casting to reinforce dual ceramic particles of Zirconium Diboride(ZrB_(2))and Boron Carbide(B4C).The weight percentage(wt%)of ZrB_(2) was varied(0,5,10,and 15),while a constant 5 wt%of B4C was maintained during this *** as-cast samples have been assessed using an Optical Microscope(OM)and a Scanning Electron Microscope(SEM)with Energy Dispersive Spectroscopy(EDS).The properties such as hardness,tensile strength,and wear characteristics of stir cast specimens were assessed to examine the impact of varying weight percentages of reinforcements in AA 2014 *** particular,dry sliding wear behaviour was evaluated considering varied loads using a pin-on-disc *** the weight%of ZrB_(2) grew and B4C was incorporated,hybrid composites showed higher hardness,tensile strength,and wear ***,the incorporation of a cumulative reinforcement consisting of 15 wt%ZrB_(2) and 5 wt%B4C resulted in a significant 31.86%increase in hardness and a 44.1%increase in tensile strength compared to AA 2014 *** addition,it has been detected that wear resistance of hybrid composite pin(containing 20 wt%cumulative reinforcement)is higher than that of other stir cast wear test pins during the whole range of applied *** surfaces of tensile specimens showed ductile fracture in the AA 2014 matrix and mixed mode for hybrid *** surfaces obtained employing higher applied load indicated abrasive wear with little plastic deformation for hybrid composites and dominant adhesive wear for matrix ***,the superior mechanical and tribological performance of hybrid composites can be attributed to dual reinforcement pa
All-vanadium flow batteries（VFBs） are one of the most promising large-scale energy storage *** an operando quantitative analysis of the polarizations in VFBs under different conditions is essential for developing hi...
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All-vanadium flow batteries（VFBs） are one of the most promising large-scale energy storage *** an operando quantitative analysis of the polarizations in VFBs under different conditions is essential for developing high power density ***,we employ an operando decoupling method to quantitatively analyze the polarizations in each electrochemical and chemical reaction of VFBs under different catalytic *** show that the reduction reaction of V3+presents the largest activation polarization,while the reduction reaction of VO2+primarily contributes to concentration polarizations due to the formation of the intermediate product V2O3+.Additionally,it is found that the widely used electrode catalytic methods,incorporating oxygen functional groups and electrodepositing Bi,not only enhance the reaction kinetics but also exacerbate concentration polarizations simultaneously,especially during the discharge ***,in the battery with the high oxygen-containing electrodes,the negative side still accounts for the majority of activation loss（75.3%） at 200 mA cm-2,but it comes down to 36,9% after catalyzing the negative reactions with *** work provides an effective way to probe the limiting steps in flow batteries under various working conditions and offers insights for effectively enhancing battery performance for future developments.
Aluminium metal matrix composites, have emerged as a potentially useful high class of materials in recent years. The surface roughness and wear characteristics of the material are the fundamental material factors that...
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Phase change energy storage is one of the solutions to effectively deal with the problemof intermittency and spatial and temporal mismatch between supply and demand of new energy sources(solar,wind,etc.).However,phase...
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Phase change energy storage is one of the solutions to effectively deal with the problemof intermittency and spatial and temporal mismatch between supply and demand of new energy sources(solar,wind,etc.).However,phase change materials(PCMs)suffer fromlowthermal conductivity,which greatly affects energy storage and release *** this study,a novel shape-stable phase change material(SSPCM)was prepared by mixing coconut oil(CO)as a PCM with aluminum nitride(AlN)thermally conductive reinforcing particles and vacuum impregnated into expanded graphite(EG).The results showed that the thermal conductivity of the prepared SSPCM reached 2.985W·m^(-1)·K^(-1),which was 1765%higher than that of pure *** latent heat of SSPCM was 83.67 J·g^(-1),which was 99%of the theoretical ***,SSPCM showed excellent thermal stability and thermal cycle *** proposed SSPCMs have the advantages of being renewable and simple preparation methods,which have great potential for application.
This study focused on the buckling characteristics of egg-shaped shells with single crack and double cracks under axial ***,the geometric parameters of the egg-shaped shell were designed,and a numerical model of the e...
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This study focused on the buckling characteristics of egg-shaped shells with single crack and double cracks under axial ***,the geometric parameters of the egg-shaped shell were designed,and a numerical model of the egg-shaped shell was ***,the initial crack was introduced into the equatorial weld of the egg-shaped shell,and the effects of the crack on the buckling characteristics under different wall thicknesses were explored,as were the effects of the single crack direction,double crack angle and spacing on the buckling ***,crack-free,single crack and double crack egg-shaped shells were fabricated from Q235 *** buckling loads and failure modes of the three egg-shaped shells were obtained via axial compression *** numerical critical buckling loads and buckling modes were compared with the experimental results to verify the accuracy of the numerical *** results of this study are valuable for the design of egg-shaped shells under axial loading.
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