Xenotime rare-earth(RE)phosphates are emerging as promising materials for environmental barrier coatings(EBCs)for SiC-based ceramic-matrix composites(CMCs)because of their close coefficients of thermal expansion(CTEs)...
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Xenotime rare-earth(RE)phosphates are emerging as promising materials for environmental barrier coatings(EBCs)for SiC-based ceramic-matrix composites(CMCs)because of their close coefficients of thermal expansion(CTEs)and resistance to calcium-magnesium-alumina-silicate(CMAS)*** this work,high-entropy(HE)(Sc_(0.2)Lu_(0.2)Yb_(0.2)Er_(0.2)Y_(0.2))PO_(4) and five single-component REPO4(RE=Sc,Lu,Yb,Er,and Y)compounds were synthesized,and their stability,thermal properties,and CMAS corrosion resistance were *** CTE values of four REPO_(4) compounds(RE=Lu,Yb,Er,and Y;~(5.6-6)×10^(−6)℃^(−1))are close to those of SiC-CMC((4.5-5.5)×10^(−6)℃^(−1)),whereas ScPO_(4)(6.98×10^(−6)℃^(−1))and HE(5RE_(0.2))PO_(4)(6.39×10^(−6)℃^(−1))have slightly higher values in the temperature range of 200-1300℃.HE phosphate has the lowest thermal conductivity due to its size and mass *** CMAS corrosion tests at 1300℃ for 5,45,and 96 h revealed that all RE phosphates formed a continuous and dense reaction layer predominantly composed of Ca_(8)MgRE(PO_(4))_(7),effectively impeding CMAS ***,REPO_(4) with smaller RE³−cations displays a slower reaction rate and reduced corrosion kinetics,as evidenced by the smaller thickness of the reaction layer.A larger negative difference in the optical basicity(OB)value between REPO_(4) and CMAS signifies greater corrosion resistance.A mechanistic understanding of CMAS corrosion and elucidation of the effects of critical parameters such as the ionic mass and ionic radius of RE elements on their thermal properties and CMAS corrosion kinetics are useful for the development of novel xenotime-type phosphates as EBCs for SiC-CMCs.
Development of individual building in existing district is common in high-density cities due to the limited *** development affects the local microclimate naturally,but the interaction is ignored in current building d...
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Development of individual building in existing district is common in high-density cities due to the limited *** development affects the local microclimate naturally,but the interaction is ignored in current building design *** this study,a comprehensive and systematic analysis is conducted to investigate the mutual impacts between new individual building design and local microclimate considering the interaction,and to identify the major influential building parameters on both local microclimate and building energy performance in subtropical urban area.A large number of high-resolution microclimate and building simulations are performed based on advanced GIS spatial analysis techniques under different building designs for the assessment of mutual impacts.A global sensitivity analysis is conducted to identify the major influential building *** results show that different building designs lead to significant variation of local wind velocity(i.e.,−0.95 to+4.51 m/s)and air temperature(i.e.,−0.60 to+1.17 K),while the local microclimate results in a change in the building energy consumption from−41.75 to 291.54 kJ/m^(2).The major influential parameters on both pedestrian thermal discomfort and building energy performance are building height and overall heat transfer coefficient of the building *** study provides valuable references for new building or rebuilding design in order to facilitate carbon neutrality and enhance thermal comfort in urban area.
Maritime ship remote sensing image recognition holds immense importance for maritime safety management and military operations. This study enhances recognition efficiency by optimizing residual network 34 through spat...
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Multi-hop networks are widely used due to their wide coverage and strong adaptability. However, multi-hop networks are prone to attacks and user privacy breaches when transmitting data between nodes. Therefore, a mult...
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We derive and validate a generalization of the two-point visual control model, an accepted cognitive science model for human steering behavior. The generalized model is needed as current steering models are either ins...
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The authors describe a series of curricula at the Master's level that have been developed at Rensselaer over the last three years. The curricula are aimed at producing graduates who have both a working knowledge o...
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The authors describe a series of curricula at the Master's level that have been developed at Rensselaer over the last three years. The curricula are aimed at producing graduates who have both a working knowledge of microelectronics manufacturing, and the general background necessary to conceive and implement process or product improvements. The description includes both the content of the curricula developed in terms of course work and laboratory experiences, and the means of delivery and delivery options developed to maximize access to the program by students from a wide variety of backgrounds and circumstances. The authors assess the results of this program, both in terms of the program output and in terms of the relation of this program to the graduate program at Rensselaer in general.< >
As the world population grows older, the demographic issue of aging becomes more prevalent in society, as this group starts facing increasing physical and psychological challenges throughout their daily lives. Older a...
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Among the increasing number of health issues related to aging and the growing elderly population, there is an urgent need for new ways to improve well-being among older adults. Recognizing the complex connection betwe...
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This paper considers the sequential design of remedial control actions in response to system anomalies to prevent blackouts. A physics-guided reinforcement learning (RL) framework is designed to identify effective seq...
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Semitransparent organic photovoltaics(ST-OPVs) for building integration represent a pivotal direction in the development of photovoltaic industry. Solution-processed silver nanowires(AgNWs) are considered promising ca...
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Semitransparent organic photovoltaics(ST-OPVs) for building integration represent a pivotal direction in the development of photovoltaic industry. Solution-processed silver nanowires(AgNWs) are considered promising candidates for transparent electrodes in semitransparent devices due to their high transparency-conductivity-efficiency merit, large-scale processability, and low cost. In this work, we develop two solution-processed organic–inorganic hybrid electrodes, named AgNWs-PD and AgNWsPC, utilizing AgNWs as the conductive framework and aliphatic amine-functionalized perylene-diimide(PDINN) as the sandwiched material, while AgNWs-PC exhibits significantly improved electrical conductivity and enhanced contact area with the underlying electron transport layer. The optimized device achieves a power conversion efficiency of 9.45% with an open circuit voltage of 0.846 V, a high filling factor of 75.4%, and an average visible transmittance(AVT) of 44.0%, delivering an outstanding light utilization efficiency(LUE) of 4.16%, which is the highest reported value for all solution-processed ST-OPVs. In addition, by coupling a 30-nm tellurium dioxide atop AgNWs-PC, the bifaciality factor of derivative devices improves from 73.7% to 99.4%, while maintaining a high bifacial LUE over 3.7%. Our results emphasize the superiority and effectiveness of PDINN-sandwiched AgNWs electrodes for highperformance and all solution-processed ST-OPVs.
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