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Journal of Materials Science & Technology 2023年第23期154卷 232-240页

作者： Chen liu Wenchao Yang Kaili Cao Pengfei Qu Jiarun Qin Jun Zhang Lin liu State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China

A new insight into the microstructural stability was proposed in Ni-based single crystal superalloys with Ru addition,and the element segregation behavior atγ/γ′interface was investigated by three-dimensional atom probe technology(3D-APT).After standard heat treatment,it was found that Ru addition barely altered the element partitioning coefficient betweenγmatrix andγ′phase,and no element-segregation layer was observed atγ/γ′*** the heat exposure at 1100°C,Ru addition obviously promoted the rafting of theγ′precipitates and inhibited the precipitation of topological close-packed(TCP)*** was more important that an element-segregation layer containing Re,Co,and Cr was formed in theγmatrix close to theγ/γ′interface due to an“uphill diffusion”effect,and its concentration was obviously reduced after Ru ***,the microstructural stability based on the element segregation behavior atγ/γ′interface was *** element-segregation layer increased theγ/γ′interfacial energy by increasing the absolute value of the lattice misfit ofγ/γ′interface to promote the rafting of theγ′precipitates after Ru *** the other hand,the decrease of the segregation concentration of Re,Co,and Cr elements as TCP phase-forming elements near theγ/γ′interface due to a“reverse partitioning”effect inhibits the precipitation of TCP phases in Ni-based single crystal superalloys after Ru addition.

关键词： Ni-based single crystal superalloys Ru element Element segregation TCP phase γ′rafting

Inhibiting liquid permeation into silicone rubber by superhydrophobic coating for prolonged service life

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High Voltage 2023年第5期8卷 986-996页

作者： Shuming liu Ying Zhou Zhou Zuo Shuqi liu Qian Wang Zhong Chen Xidong Liang State Key Laboratory of Control and Simulation of Power System and Generation Equipment Department of Electrical EngineeringTsinghua UniversityBeijingChina School of Material Science and Engineering Nanyang Technological UniversitySingaporeSingapore

Liquid permeation into silicone rubber(SR)may lead to the degradation or complete failure of the composite *** to inhibit liquid permeation,two kinds of superhydrophobic coatings are applied to the SR *** liquid permeation properties of SR with different types of liquids are investigated,and the Langmuir diffusion model is applied to analyse the experimental *** results show that the composite superhydrophobic coating can effectively inhibit liquid permeation by reducing the contact area between the surface and liquid,and the stable structure of the composite coating can maintain the performance after the liquid permeation and ***,the nano‐particle coating without the polymer binder experiences severe performance degradation during the immersion test,and it cannot restrain the liquid permeation anymore after it loses the *** a validation of the effective protection,the insulation resistivity change was *** resistivity decreases sharply for the pristine SR after water permeation;however,the decrease is much smaller for the coated *** current study not only provides new insight into the liquid permeation properties of SR with different surface wettability but also suggests an effective measure to prevent liquid permeation into SR.

关键词： coating permeation liquid

Graph reasoning over explicit semantic relation

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High-Confidence Computing

High-Confidence Computing 2024年第2期4卷 136-144页

作者： Tianyou Zhu Shi liu Bo Li Junjian liu Pufan liu Fei Zheng State Grid Corporation of China Beijing 100031China

Multi-hop reasoning over language or graphs represents a significant challenge in contemporary research,particularly with the reliance on deep neural *** networks are integral to text reasoning processes,yet they present challenges in extracting and representing domain or commonsense knowledge,and they often lack robust logical reasoning *** address these issues,we introduce an innovative text reasoning *** framework is grounded in the use of a semantic relation graph and a graph neural network,designed to enhance the model’s ability to encapsulate knowledge and facilitate complex multi-hop *** framework operates by extracting knowledge from a broad range of *** constructs a semantic relationship graph based on the logical relationships inherent in the reasoning *** with the core question,the framework methodically deduces key knowledge,using it as a guide to iteratively establish a complete evidence chain,thereby determining the final *** the advanced reasoning capabilities of the graph neural network,this approach is adept at multi-hop logical *** demonstrates strong performance in tasks like machine reading comprehension and question answering,while also clearly delineating the path of logical reasoning.

关键词： Semantic relation graph Multi-hop reasoning Graph neural network

Electrostatic self-assembly of 2D/2D CoWO_(4)/g-C_(3)N_(4)p-n heterojunction for improved photocatalytic hydrogen evolution:Built-in electric field modulated charge separation and mechanism unveiling

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Nano Research 2022年第8期15卷 6987-6998页

作者： Haiyang Wang Ranran Niu Jianhui liu Sheng Guo Yongpeng Yang Zhongyi liu Jun Li Henan Institute of Advanced Technology College of ChemistryZhengzhou UniversityZhengzhou 450052China School of Chemistry and Environmental Engineering Wuhan Institute of TechnologyWuhan 430205China

Two-dimensional(2D)semiconductor heterojunctions are considered as an effective strategy to achieve fast separation of photoinduced ***,a novel CoWO_(4)/g-C_(3)N_(4)(CWO/CN)p–n junction was synthesized using an electrostatic selfassembly *** constructed 2D/2D p–n heterostructure had a rich hetero-interface,increased charge density,and fast separation efficiency of photoinduced *** in-situ Kelvin probe force microscopy confirmed that the separation pathway of photoinduced carriers through the interface obeyed an II-scheme charge transfer *** results and density functional theory calculations indicated the differences of work function between CWO and CN induced the generation of built-in electric field,ensuring an efficient separation and transfer process of photoinduced *** the optimized conditions,the CWO/CN heterojunction displayed enhanced photocatalytic H_(2)generation activity under full spectrum and visible lights irradiation,*** study provides a novel approach to design 2D/2D hetero-structured photocatalysts based on p–n type semiconductor for photocatalytic H_(2)generation.

关键词： p-n junction interfacial charge transfer two-dimensional/two-dimensional photocatalytic H_(2)generation CoWO_(4)/g-C_(3)N_(4)heterojunction

20μm Li metal modified with phosphate rich polymer-inorganic interphase applied in commercial carbonate electrolyte

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Journal of Energy Chemistry 2023年第1期76卷 233-238,I0006页

作者： Lin Lin Wei Lu Feipeng Zhao Siru Chen Jia liu Haiming Xie Yulong liu School of Chemistry Northeast Normal UniversityChangchun 130024JilinChina Key Laboratory of Functional Materials Physics and Chemistry Ministry of Education Jilin Normal UniversityChangchun 130103JilinChina College of Information Technology Jilin Normal UniversitySiping 13600oJilinChina Department of Mechanical and Materials Engineering Western UniversityLondon N6A 3K7Canada

Li metal batteries are supposed to reach real application in order to fulfill the high-energy density requirement of energy storage ***,the commonly used carbonate electrolyte react with pristine Li,which result in short lifetime of lithium metal *** alleviate the side reactions of Li metal with liquid electrolyte,here we propose a phosphate rich polymer-inorganic layer as an *** to the inert properties of lithium phosphate derived from LiPO_(2)F_(2)and poly-ether,the side-reaction of carbonate solvent are *** a result,lithium metal anode sustains for 800 cycles in symmetrical cell test under 1 m A cm^(-2).Even under strict condition(20μm Li,capacity ratio N/P=2.3,electrolyte/active material=3μL mg^(-1)),coin cell test still runs stable for 150 cycles with high Coulombic ***,both LiFePO_(4)and LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)pouch cell under 5μL m A^(-1)h^(-1)condition also exhibit good stability at 0.5 C and 2 C *** this approach,high-energy and high-power Li metal batteries are approaching to real application in the near future.

关键词： Lithium metal anode Lithium phosphate Ultra-thin Lithium Solid electrolyte interphase

Influence of wave front healing on seismic tomography

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Science China Earth Sciences 2012年第11期55卷 1891-1900页

作者： liu YuZhu Dong LiangGuo State Key Laboratory of Marine Geology Tongji UniversityShanghai 200092China

Wave front healing is a common natural *** further investigate wave front healing,we simulated wave propagation in a spherical anomaly surrounded by homogeneous media using a high-order finite difference solution of the acoustic ***,we analyzed the characteristics of the wave propagation in the anomaly,and found that they are related to the dominant frequency of the seismic wave and the dimensions of the *** quantitative comparison of the wave front energy of the diffracted wave and transmitted wave,we summarized the influences of the wave front healing on seismic *** conclude that,under the strong scattering condition,only positive anomalies can be inverted by ray-based tomography,only large anomalies can be inverted by finite-frequency tomography,and small negative anomalies cannot be inverted by any first-arrival traveltime tomographic *** conclusions are verified by tomographic experiments based on different theoretical ***,we propose that more information besides the first-arrival traveltime should be used to invert the high wave number components of the *** the above acquisitions of wave front healing on seismic tomography,we explain the banana-doughnut phenomena,and offer a new insight into the wave scattering,which should be important for better understanding the wave propagation and seismic inversion.

关键词： finite-frequency Fresnel volume tomography scattering condition seismic inversion wave front healing

Energy Absorption Performance of Bionic Multi-cell Tubes Inspired by Shrimp chela

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Acta Mechanica Solida Sinica 2023年第5期36卷 754-762页

作者： Rui Liang Na liu Xiang liu Tao Wei Lirong Mo Huanchao Huang Christophe Bastien School of Automobile Engineering Guilin University of Aerospace TechnologyGuilin 541004China Fangsheng Axle(liuzhou)Co.LTD Liuzhou 545036China Institute for Future Transport and Cities Coventry UniversityCoventry CV12TEUK

This research introduced the design,analysis and optimization of bionic shrimp chela multi-cell tubes(BSCMTs)in bending by embedding an arthropod's microstructure inside a thin-walled square structure.A three-point impact bending finite element model was,in the first instance,correlated with physical tests and then modified to assess the energy absorption performance of bionic multi-cell tubes considering initial peak force,specific energy absorption and mean crushing *** a complex proportional assessment(COPRAS)approach and optimization phases,results demonstrated that the BSCMT with a W-shape section had the best energy absorption characteristics and should be considered in future as a possible contender for vehicle B-pillar structures that are subjected to bending and require excellent energy absorption properties to protect the occupants in high-speed impact collisions.

关键词： Energy absorption Bionic Microstructure Shrimp chela Multi-cell tube

Spheroid construction strategies and application in 3D bioprinting

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Bio-Design and Manufacturing 2024年第5期7卷 800-818页

作者： Chunxiang Lu Chuang Gao Hao Qiao Yi Zhang Huazhen liu Aoxiang Jin Yuanyuan liu School of Mechatronic Engineering and Automation Shanghai UniversityShanghai 200444China School of Medicine Shanghai UniversityShanghai 200444China

Tissue engineering has been striving toward designing and producing natural and functional human *** are the fundamental building blocks of *** with traditional two-dimensional cultured cells,cell spheres are threedimensional(3D)structures that can naturally form complex cell–cell and cell–matrix *** structure is close to the natural environment of cells in living *** addition to being used in disease modeling and drug screening,spheroids have significant potential in tissue *** 3D bioprinting is an advanced biofabrication *** accurately deposits bioinks into predesigned 3D shapes to create complex tissue *** 3D bioprinting is efficient,the time required for cells to develop into complex tissue structures can be *** 3D bioprinting of spheroids significantly reduces the time required for their development into large tissues/organs during later cultivation stages by printing them with high cell *** spheroid fabrication and bioprinting technology should provide a new solution to many problems in regenerative *** paper systematically elaborates and analyzes the spheroid fabrication methods and 3D bioprinting strategies by introducing spheroids as building ***,we present the primary challenges faced by spheroid fabrication and 3D bioprinting with future requirements and some recommendations.

关键词： Spheroids Strategies 3D bioprinting Biofabrication

Fabrication of La1-xCaxFeO3 perovskite-type oxides with macro-mesoporous structure via a dual-template method for highly efficient soot combustion

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Journal of Rare Earths 2020年第4期38卷 369-375页

作者： Minjie Zhao Jixing liu Jian liu Junfeng Xu Zhen Zhao Yuechang Wei Weiyu Song State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China

A series of three-dimensionally ordered macro-mesoporous(3DOMM)La1-xCaxFeO3(x=0-0.3)perovskite-type oxides were designed and successfully fabricated for the first time via a dual-template *** which,PMMA and Brij-56 were employed as the hard template and soft template,*** is found that 3 DOMM La1-xCaxFeO3 exhibits abundant wormlike mesoporous channels about 3 nm in diameter on macroporous skeleton *** excellent catalytic activity of soot combustion benefits from not only the well-designed hierarchical porous structure of catalyst,but also the redox electron pair of Fe3+/Fe4+induced by the doping of low-valent alkaline earth metal Ca to A-site of LaFeO3.3DOMM La0.8Ca0.2FeO3 exhibits superior catalytic performance for soot combustion,which shows T50 of396℃.It is 189℃lower than that without catalyst.A combination of structure and composition in the design of catalyst can be widely extended to other catalytic systems.

关键词： Three-dimensionally ordered macro-mesoporous structure Perovskite-type oxides Lanthanum ferrite Soot combustion Rare earths

Reconfiguration and self-healing integrated Janus electrospinning nanofiber membranes for durable seawater desalination

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Nano Research 2023年第1期16卷 489-495页

作者： Huijie liu Jiatai Gu Ye liu Lei Yang Liming Wang Jianyong Yu Xiaohong Qin Key Laboratory of Textile Science&Technology of Ministry of Education College of TextilesDonghua UniversityShanghai 201620China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials International Joint Laboratory for Advanced Fiber and Lowdimension MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620China Innovation Center for Textile Science and Technology Donghua UniversityShanghai 201620China

Janus electrospinning nanofiber membranes have attracted extensive attention in the fields such as solar-driven interfacial desalination,liquid filtration,and waterproof and breathable ***,the Janus structures suffer from weak interfacial bonding and vulnerability to damage,making the durability and sustainability are highly sought after in real-word ***,we fabricate the simply reconfigurable and entirely self-healing Janus evaporator by electrospinning polypropylene glycol based polyurethane(PPG@PU)and polydimethylsiloxane based polyurethane-CNTs(PDMS@PU-CNTs)with different wettability,which are both designed based on dynamic Diels–Alder(DA)*** interface of the Janus membrane is stitched by the covalent bonds to directly improve the interface adhesion to 22 N·m−1,constructing an integrated evaporator,and thereby achieving a stable desalination rate of 1.34 kg·m−2·h−1 under one *** dissociation of DA networks allows the evaporators for self-healing and reconfiguration abilities,after which the photothermal performance is *** is the first work for the crosslinked self-healing polymer to be directly electrospun,achieving the improved interfacial bond and reconfiguration of entire evaporators,which presented promising new design principles and materials for interfacial solar seawater desalination.

关键词： Janus nanofiber membrane electrospinning interfacial bonding solar steam generation seawater desalination