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The NiMo-MMO catalyst with random stacked nanosheet structures was successfully synthesized by via structural topological transformation modifications, which has unique pore structure, L-acid sites, high metal dispersion, strong metal-support interactions. The high mesopore size of NiMo-MMO facilitates mass transfer of pyrene over the catalyst, and Ni as the active component can provide more surface L-acid sites, which would promote the adsorption or deep hydrogenation of aromatic substrates. Meanwhile, the synergy between the Ni and Mo could improve the hydrogenation activity, which increases more surface L-acid sites, promotes the formation of more active sites, improves the adsorption or deep hydrogenation of aromatic substrates. (See Yongliang Jia, et al., Pages 201-210)
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The proposed method is composed of three main modules: expert knowledge graph, multiscale entropy analysis, and feature extraction. First, the expert knowledge graph is constructed by analyzing wastewater components and water quality data, which illustrates key water quality parameters and the relationships among them. Second, multiscale entropy analysis is applied to uncover the inherent multi-timescale patterns within the water quality data, reducing information loss and optimizing the timescale. Third, partial least squares is used for feature extraction, which enhances the representation of sample data and iteratively refines the expert knowledge graph. Finally, the overall representation of water quality data is improved, leading to more effective monitoring capabilities. (See Honggui Han, et al., Pages 264-271)
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The cyclone-coalescence separator which combines centrifugal and coalescence principles plays a critical role in several stages of natural gas processing, including feed gas purification, desulfurization, dehydration, and tail gas treatment. In the feed purification stage, it effectively prevents droplet entrainment, removing impurities and protecting downstream equipment. During desulfurization, the separator ensures the efficient separation of liquid phases, reducing sulfur contamination. In the dehydration process, it removes triethylene glycol, improving separation efficiency and saving absorbent. Finally, in tail gas treatment, it contributes to the removal of pollutants, ensuring that the tail gas meets environmental standards. Its ability to remove harmful liquid residues is particularly notable for maintaining system performance and longevity. (See Jianan Fan et al., Pages 191-203)
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The heat dissipation problem of superpower chips severely limits their safe operation. Herein, boron nitride (BN) nanosheets self-assembled along polymethylacrylimide (PMI) molecular chains to form a stable three-dimensional network through freeze-drying and thermal imidization. The stable and complete 3D BN network leads to the enhancement of thermal conductivity. BN@PMI/epoxy (EP) composites exhibit excellent thermal conductivity and mechanical properties simultaneously, which is beneficial for solving the heat dissipation problem of superpower chips. (See Yang Wang et al., Pages 230-238)
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2024年 第76卷 第12期 刊出日期:2024-12-28
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