The rich resources and unique environment of the Moon make it an ideal location for human expansion and the utilization of extraterrestrial ***,crucial for supporting human life on the Moon,can be extracted from lunar...
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The rich resources and unique environment of the Moon make it an ideal location for human expansion and the utilization of extraterrestrial ***,crucial for supporting human life on the Moon,can be extracted from lunar regolith,which is highly rich in oxygen and contains polymetallic *** oxygen and metal extraction can be achieved using existing metallurgical ***,the ample reserves of water ice on the Moon offer another means for oxygen *** paper offers a detailed overview of the leading technologies for achieving oxygen production on the Moon,drawing from an analysis of lunar resources and environmental *** delves into the principles,processes,advantages,and drawbacks of water-ice electrolysis,two-step oxygen production from lunar regolith,and one-step oxygen production from lunar *** two-step methods involve hydrogen reduction,carbothermal reduction,and hydrometallurgy,while the one-step methods encompass fluorination/chlorination,high-temperature decomposition,molten salt electrolysis,and molten regolith electrolysis(MOE).Following a thorough comparison of raw materials,equipment,technology,and economic viability,MOE is identified as the most promising approach for future in-situ oxygen production on the *** the corrosion characteristics of molten lunar regolith at high temperatures,along with the Moon's low-gravity environment,the development of inexpensive and stable inert anodes and electrolysis devices that can easily collect oxygen is critical for promoting MOE technology on the *** review significantly contributes to our understanding of in-situ oxygen production technologies on the Moon and supports upcoming lunar exploration initiatives.
Surface albedo, as one of the important properties of the underlying surface, has a significant impact on the surface energy balance in cold regions. However, due to the complexity of the factors affecting surface alb...
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Surface albedo, as one of the important properties of the underlying surface, has a significant impact on the surface energy balance in cold regions. However, due to the complexity of the factors affecting surface albedo, existing calculations still contain inaccuracies. Therefore, this study conducted surface albedo experiments on loess with different water contents and temperatures. By analyzing the surface albedo measurements of samples with varying temperature and water content levels, as well as the soil freezing characteristic curve(SFCC) and soil-water characteristic curve(SWCC) of loess, the study explores the influence of soil temperature and water content on the surface albedo of loess. The results indicate that both the temperature and water content of loess jointly affect surface albedo. During the process of albedo change, there exists a water content threshold that alters the trend of surface albedo. Soil temperature influences surface albedo by affecting the content of pore ice and liquid water within the soil. When the water content of loess is relatively low, the surface albedo decreases as the unfrozen water content decreases. However, this trend changes as the water content of loess increases. Additionally, a decrease in soil temperature lowers the moisture content threshold during the changes in surface albedo. This study provides a reference for exploring and determining the surface energy balance in cold regions under the background of warm and humid climates, as well as for establishing thermal calculation boundaries.
This paper describes the design and analysis of a flexible microstrip patch antenna for wireless applications that uses reduced graphene oxide (rGO) material deposition on cotton substrates. Using a microstrip line-fe...
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Investigating the interaction between purge flow and main flow in gas turbines is crucial for optimizing thermal management,and enhancing aerodynamic *** the high-speed rotating rotor poses challenges;however,employin...
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Investigating the interaction between purge flow and main flow in gas turbines is crucial for optimizing thermal management,and enhancing aerodynamic *** the high-speed rotating rotor poses challenges;however,employing the pre-swirl method to model rotational effect can facilitate experimental *** study evaluates the validity of the pre-swirl method for modeling rotational *** simulations are conducted under both stationary conditions,with seven swirl ratios,and rotational *** investigation focuses on the underlying mechanisms of pre-swirl and ***-swirl and rotation impart circumferential velocity to the purge flow relative to the blade,resulting in a diminishing effect on endwall *** the other hand,pre-swirl reduces the adverse pressure gradient,and the rotation generates Coriolis forces acting on the passage vortex,both contribute to an increasing effect on endwall *** pre-swirl condition,the diminishing effect is dominant,while in rotational condition,neither the diminishing nor the increasing effect exhibits an overwhelmingly dominant trend.
Seeking an Egyptian real estate industry receptive to real-time interactive design, this study departs from static 3D renders to enhance user engagement. Advanced interactive design walkthrough prototypes, integrated ...
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Magnetic refrigeration(MR)technology is regarded as an ideal solution for cryogenic applications,relying on magnetocaloric materials which provide necessary chilling effect.A series of polycrystalline Tm_(1-x)Er_(x)Ni...
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Magnetic refrigeration(MR)technology is regarded as an ideal solution for cryogenic applications,relying on magnetocaloric materials which provide necessary chilling effect.A series of polycrystalline Tm_(1-x)Er_(x)Ni_(2)Si_(2)(x=0.2,0.4)compounds was synthesized,and their magnetic properties,magnetic phase transition together with magnetocaloric effect(MCE)were *** Tm_(1-x)Er_(x)Ni_(2)Si_(2)(x=0.2,0.4)compounds display a field-induced metamagnetic transition from antiferromagnetic(AFM)to ferromagnetism(FM)in excess of 0.2 T,***,the AFM ground state is *** the field change of 0-2 T,the values of maximal magnetic entropy change(-ΔS_(M)^(max))and refrigerant capacity(RC)for Tm_(0.8)Er_(0.2)Ni_(2)Si_(2)compound are 17.9 J/(kg·K)and 83.5 J/kg,*** large reversible MCE under low magnetic fields(≤2 T)indicates that Tm_(0.8)Er_(0.2)Ni_(2)Si_(2)compound can serve as potential candidate materials for cryogenic magnetic refrigeration.
Frustrated lanthanide oxides with dense magnetic lattice and suppressed ordering temperature have potential applications in cryogenic magnetic ***,the crystal structure,magnetic properties,magnetic phase transition(MP...
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Frustrated lanthanide oxides with dense magnetic lattice and suppressed ordering temperature have potential applications in cryogenic magnetic ***,the crystal structure,magnetic properties,magnetic phase transition(MPT)together with magnetocaloric effect(MCE)of LnOF(Ln=Gd,Dy,Ho,and Er)compounds were *** study shows that these compounds crystallize in the centrosymmetric space group R3m with an ideal triangular *** long-range magnetic ordering is observed above 2 K for LnOF(Ln=Gd,Ho,and Er).However,DyOF compound undergoes an MPT from paramagnetic(PM)to antiferromagnetic(AFM)at the Neel temperature(TN≈4 K).Considerable reversible MCE is observed in these triangular-lattice *** the magnetic field change(μ0ΔH)of 0-2 T,the maximum values of magnetic entropy change(-ΔSMmax)of them are 6.1,9.4,12.7,and 14.1 J/(kg·K),***,the value of ErOF with Ising-like spin is 2.3 times that of GdOF,which provides an approach for exploring magnetic refrigerants with excellent low-field cryogenic magnetocaloric effect.
Augmented reality (AR) has been widely employed in intelligent assembly tasks to improve assembly efficiency by layering virtual instructions onto real assemblies, providing operators with step-by-step guidance. Howev...
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The demand for energy-efficient and environmental-friendly power grid construction has made the exploitation of bio-based electrical epoxy resins with excellent properties increasingly *** work developed the bio-based...
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The demand for energy-efficient and environmental-friendly power grid construction has made the exploitation of bio-based electrical epoxy resins with excellent properties increasingly *** work developed the bio-based electrotechnical epoxy resins based on ***-performance epoxy resin(DGEMT)with a double crosslinked points and its composites(Al_(2)O_(3)/DGEMT)were obtained taking advantages of the two bifunctional groups(allyl and phenolic hydroxyl groups)of *** from the distinctive structure of DGEMT,the Al_(2)O_(3)/DGEMT composites exhibited the advantages of intrinsically high thermal conductivity,high insulation,and low dielectric *** AC breakdown strength and thermal conductivity of Al_(2)O_(3)/DGEMT composites were 35.5 kV/mm and 1.19 W·m-1·K-1,respectively,which were 15.6%and 52.6%higher than those of petroleum-based composites(Al_(2)O_(3)/DGEBA).And its dielectric loss tanδ=0.0046 was 20.7%lower than that of Al_(2)O_(3)/***,the mechanical,thermal and processing properties of Al_(2)O_(3)/DGEMT are fully comparable to those of Al_(2)O_(3)/*** work confirms the feasibility of manufacturing environmentally friendly power equipment using bio-based epoxy resins,which has excellent engineering applications.
In order to improve the accuracy of ceramic additive manufacturing (AM), predicting the deformation of green parts is very important. In order to simplify the complexity of the microscopic chemical reaction kinetics m...
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