Additive manufacturing offers a substantial reduction in lead times by enabling rapid design iterations, thereby accelerating the product development cycle. This method has been widely adopted across various sectors, ...
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Lithium plating is a detrimental phenomenon in lithium-ion cells that compromises both functionality and *** study investigates electro-chemo-mechanical behaviors of lithium plating in lithium iron phosphate pouch cel...
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Lithium plating is a detrimental phenomenon in lithium-ion cells that compromises both functionality and *** study investigates electro-chemo-mechanical behaviors of lithium plating in lithium iron phosphate pouch cells under different external *** force microscopy nanoindentation is performed on the graphite electrode to analyze the influence of external pressure on solid-electrolyte interphase(SEI),revealing that the mechanical strength of SEI,indicated by Young's modulus,increases with the presence of external ***,an improved phase field model for lithium plating is developed by incorporating electrochemical parameterization based on nonequilibrium *** results demonstrate that higher pressure promotes lateral lithium deposition,covering a larger area of ***,electrochemical impedance spectroscopy and thickness measurements of the pouch cells are conducted during overcharge,showing that external pressure suppresses gas generation and thus increases the proportion of lithium deposition among galvanostatic overcharge *** integrating experimental results with numerical simulations,it is demonstrated that moderate pressure mitigates SEI damage during lithium plating,while both insufficient and excessive pressure may exacerbate *** study offers new insights into optimizing the design and operation of lithium iron phosphate pouch cells under external pressures.
The projected speckle-based three-dimensional digital image correlation method(3D-DIC)is being increasingly used in the reliability measurement of microelectronic packaging structures because of its noninvasive nature...
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The projected speckle-based three-dimensional digital image correlation method(3D-DIC)is being increasingly used in the reliability measurement of microelectronic packaging structures because of its noninvasive nature,high precision,and low ***,during the measurement of the thermal reliability of packaging structures,the thermal airflow generated by heating introduces distortions in the images captured by the DIC measurement system,impacting the accuracy and reliability of noncontact *** address this challenge,a thermal airflow distortion correction model based on the transformer attention mechanism is proposed specifically for the measurement of thermal warpage in microelectronic packaging *** model avoids the oversmoothing issue associated with convolutional neural networks and the lack of physical constraints in generative adversarial networks,ensuring the precision of grayscale gradient changes in speckle patterns and minimizing adverse effects on DIC calculation *** inputting the distorted images captured by the DIC measurement system into the network,corrected images are obtained for 3D-DIC calculations,thus allowing the thermal warpage measurement results of the sample to be *** experiments measuring topography with customized step block specimens,the effectiveness of the proposed method in improving warpage measurement accuracy is confirmed;this is particularly true when captured images are affected by thermal airflow at 140°C and 160°C,temperatures commonly encountered in thermal reliability testing of packaging *** method successfully reduces the standard deviation from 9.829 to 5.943μm and from 12.318 to 6.418μm,*** results demonstrate the substantial practical value of this method for measuring thermal warpage in microelectronic packaging structures.
A numerical approach is presented to simulate the combined effect of pressure, temperature, roughness and cavitation in the hydrodynamic plain journal bearing. The oil film temperature within the bearing increases bec...
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The dynamic balance assessment during the assembly of the coordinator gyroscope significantly impacts the guidance accuracy of precision-guided *** dynamic balance debugging,reliance on rudimentary counterweight empir...
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The dynamic balance assessment during the assembly of the coordinator gyroscope significantly impacts the guidance accuracy of precision-guided *** dynamic balance debugging,reliance on rudimentary counterweight empirical formulas persists,resulting in suboptimal debugging accuracy and an increased repetition *** mitigate this challenge,we present a multi-head residual graph attention network(ResGAT)model,designed to predict dynamic balance counterweights with high *** this research,we employ graph neural networks for interaction feature extraction from assembly graph *** SDAE-GPC model is designed for the assembly condition classification to derive graph data inputs for the ResGAT regression model,which is capable of predicting gyroscope counterweights under small-sample *** results of our experiments demonstrate the effectiveness of the proposed approach in predicting dynamic gyroscope counterweight in its assembly *** approach surpasses current methods in mitigating repetition rates and enhancing the assembly efficiency of gyroscopes.
Industry 4.0 has enabled manufacturing organizations to integrate big data analytics for designing an intelligent and flexible decision-making process known as data driven decision making (DDDM). The study employs DEM...
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Metal matrix composites (MMCs) are widely recognized as a dependable solution for fulfilling the requirements of engineering materials, including but not limited to mechanical properties, physical density, and outstan...
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The borohydride reduced electroless coatings are widely used for their excellent tribological, physical and mechanical behaviours. The coating behaviours are dependent on its compositions. The addition of hard particl...
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Solar photoelectrochemical water-splitting is a potential process for producing renewable hydrogen. Here, the energy transport phenomena associated with hydrogen bubble generation are investigated for the future desig...
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This work reports that the flame oscillation induced by acoustic excitation can effectively suppress soot generation in Rijke-type *** the acoustic frequency is close to the natural frequency of the burner system,it c...
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This work reports that the flame oscillation induced by acoustic excitation can effectively suppress soot generation in Rijke-type *** the acoustic frequency is close to the natural frequency of the burner system,it can produce resonance resulting in intense oscillation of the *** relationship between the soot suppression efficiency and the acoustic field of standing wave at different flame positions is *** with that under self-excited oscillation,when there is external forced acoustic force introduced to the flame,oscillation combustion occurred in a lager zone in the glass *** fundamental cause of different soot suppression efficiency at different positions is that the standing wave acoustic field causes the particles to move at different speeds in different positions of the glass *** axial particle velocity difference results in the formation of acoustic vortexes and the change of the flame *** high particle velocity causes the air in the glass tube to turn into the turbulent condition and make the flame temperature *** results show that the surface growth rate of soot is reduced,while the oxidation rate of soot is enhanced,which result in the soot suppression under acoustic *** study can provide some reference for the practical application of oscillate combustion in soot suppression.
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