This work extends the adjoint-deep learning framework for runaway electron (RE) evolution developed in Ref. [1] to account for large-angle collisions. By incorporating large-angle collisions the framework allows the a...
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The paper presents a numerical study on the crack driving force (CDF) of growing cracks in elastic−plastic, creeping materials, applying the concept of configurational forces. Crack propagation is modelled by alternat...
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The gas flow characteristics in lid-driven cavities are influenced by several factors, such as cavity geometry, gas properties, and boundary conditions. In this study, the physics of heat and gas flow in cylindrical l...
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Supercapacitors have attracted considerable attention because of their benefits in terms of high power density, rapid charge-discharge rates, and extended cycle life. Metal-organic framework materials (MOFs), known fo...
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Dehumidification has a massive impact on the energy efficiency of the air condition system. Condensation is a common way to achieve dehumidification. However, a certain amount of energy is required for harvesting wate...
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Dehumidification has a massive impact on the energy efficiency of the air condition system. Condensation is a common way to achieve dehumidification. However, a certain amount of energy is required for harvesting water from the air through condensation. A hybrid hollow fiber membrane system proves to be effective in lowering the consumption of ***, the surfaces with patterned wettability receives inadequate attention despite its potential to achieve energyefficient dehumidification. This review casts a view on the mechanism of condensation via patterned surfaces, which are normally originated from natural biomimetic surfaces. Then, three kinds of surfaces, including the completely hydrophobic surface, completely hydrophilic surface, and the hybrid surface, is employed to explain the working principles of dehumidification via condensation. Besides, the connection between air conditioning and dehumidification and an application that involves a membrane dehumidification and water harvest system for condensation are introduced. It can be concluded that the patterned surfaces do have potentials that can be adopted to air conditioning, considering its exceptional condensation capability.
Porous SnO2 microflowers consisting of uniform nanosheets modified by Pt NPs were synthesized using a self-sacrificing template followed by a reduction strategy. The Pt@SnO2, SnO2–Se, and SnO2–S samples were charact...
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Solar energy represents one of themost important renewable energy sources contributing to the energy transition *** that the observation of daily global solar radiation(GSR)is not affordable in some parts of the globe...
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Solar energy represents one of themost important renewable energy sources contributing to the energy transition *** that the observation of daily global solar radiation(GSR)is not affordable in some parts of the globe,there is an imperative need to develop alternative ways to predict ***,the main objective of this study is to evaluate the performance of different hybrid data-driven techniques in predicting daily GSR in semi-arid regions,such as the majority of Spanish ***,four ensemble-based hybrid models were developed by hybridizing Additive Regression(AR)with Random Forest(RF),Locally Weighted Linear Regression(LWLR),Random Subspace(RS),and *** base algorithms of the developed models are scarcely applied in previous studies to predict solar *** testing phase outcomes demonstrated that the ARRF models outperform all other hybrid *** provided models were validated by statisticalmetrics,such as the correlation coefficient(R)and root mean square error(RMSE).The results proved that Scenario#6,utilizing extraterrestrial solar radiation,relative humidity,wind speed,and mean,maximum,and minimum ambient air temperatures as the model inputs,leads to the most accurate predictions among all scenarios(R=0.968–0.988 and RMSE=1.274–1.403 MJ/m^(2)・d).Also,Scenario#3 stood in the next rank of accuracy for predicting the solar radiation in both validating *** AD-RF model was the best predictive,followed by AD-RS and ***,this study recommends new effective methods to predict GSR in semiarid regions.
This work is done to investigate and assess the beneficial role and added value of employing a thin layer of nano-ceramic coating to protect the components of a centrifugal pump. A case study is considered, representi...
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ISBN:
(数字)9798350344134
ISBN:
(纸本)9798350344141
This work is done to investigate and assess the beneficial role and added value of employing a thin layer of nano-ceramic coating to protect the components of a centrifugal pump. A case study is considered, representing a centrifugal pump operating in the Arab Potash Company (APC). The ANSYS software package was used which implements numerical finite element analysis (FEA), 3D modeling, and mathematical simulations. Variables, including Von Mises stresses, deformations, and strains, were investigated associated with a number of situations related to the operation of corrosive potash salt and coating layer. Based on the numerical analysis, the research results revealed that employing a thin layer of ceramic coating protective layer could minimize the dynamic Von Mises strength's impact on the centrifugal pump's impeller and casing by 35.55%. Furthermore, it was found that utilizing a protective layer of thin-nano ceramic could alleviate the total deformations of the centrifugal pump's impeller and casing by 67.01%. It was found that using a protective layer of the thin nano-ceramic could mitigate the equivalent elastic strain on the centrifugal pump's impeller and casing by 90.14%. It was noted that maximum total deformations occur at the tip of the blades. Coating the centrifugal pump parts could improve its components' lifespan by reducing wear, corrosion, and abrasion rates.
The recent popularity of soft robots for marine applications has established a need for the reliable fabrication of actuators that enable locomotion, articulation, and grasping in aquatic environments. These actuators...
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Characterizing the local structural evolution is an essential step in understanding the nature of glass transition. In this work, we probe the evolution of Voronoi cell geometry in simple glass models by simulations a...
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Characterizing the local structural evolution is an essential step in understanding the nature of glass transition. In this work, we probe the evolution of Voronoi cell geometry in simple glass models by simulations and colloid experiments, and find that the individual particle cages deform anisotropically in supercooled liquid and isotropically in glass. We introduce an anisotropy parameter k for each Voronoi cell, whose mean value exhibits a sharp change at the mode-coupling glass transition ϕc. Moreover, a power law of packing fraction ϕ∝q1d is discovered in the supercooled liquid regime with d>D, in contrast to d=D in the glass regime, where q1 is the first peak position of structure factor, and D is the space dimension. This power law is qualitatively explained by the change of k. The active motions in supercooled liquid are spatially correlated with long axes rather than short axes of Voronoi cells. In addition, the dynamic slowing down approaching the glass transition can be well characterized through a modified free-volume model based on k. These findings reveal that the structural parameter k is effective in identifying the structure-dynamics correlations and the glass transition in these systems.
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