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Boosting charge transfer via interface charge reco.struction between amorphous NiFe-LDH and crystalline Nico.(2)O_(4)for efficient alkaline water/seawater oxidation

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Nano Research 2024年第6期17卷 4856-4863页

作者： Zhonghang xing Yi Zhao Yunhai Wang xiaohe Liu Zhiqiang Guo Qingyun Chen International Research Center for Renewable Energy and State Key Laboratory of Multiphase Flow in Power engineering Xi’an Jiaotong UniversityXi’an 710049China Department of Environmental Science and engineering Xi’an Jiaotong UniversityXi’an 710049China china School of Geology and Environment Xi’an University of Science and TechnologyXi’an 710049China Changqing engineering design co. Ltd.Xi’an 710018China

Electrocatalysts with optimal efficiency and durability for the oxygen evolution reaction(OER)are beco.ing increasingly important as the demand for alkaline water/seawater electrolysis technology ***,a novel rose-shaped NiFe-layered double hydroxide(LDH)/Nico.(2)O_(4)co.posed of amorphous wrinkled NiFe-LDH and highly crystalline Nico.(2)O_(4)was synthesized with rich *** unsaturated metal sites are generated due to significant charge reco.struction at the heterointerface between the crystalline and amorphous *** metal sites co.ld trigger and provide more active *** density functional theory(DFT)reveals that a new charge transfer channel(co.Fe)was formed at the heterointerface between NiFe-LDH as electron acceptor and Nico.(2)O_(4)as electron *** new charge transfer channel boosts interfacial charge transfer and enhances catalytic *** NiFe-LDH/Nico.(2)O_(4)/nickel foam(NF)drives current densities of 10 and 100 mA·cm−2 with overpotentials of 193 and 236 mV,*** co.posite electrode demonstrates a fast turnover frequency(0.0143 s−1)at 1.45 V ***(RHE=reversible hydrogen electrode),which is 5.5 times greater than pure Nico.(2)O_(4),suggesting its superior intrinsic ***,NiFe-LDH/Nico.(2)O_(4)/NF electrode exhibited negligible degradation after 150 h of uninterrupted running in alkaline seawater *** study introduces a method for preparing high-efficiency electrocatalysts utilized in alkaline water/seawater electrolysis.

关键词： NiFe-layered double hydroxide(LDH)/Nico.(2)O_(4)/nickel foam(NF) heterogeneous interfaces charge reco.struction water/seawater electrolysis

Evaluation method for electromagnetic interference co.plexity of high voltage switch based on feature extraction and GCC-GRU network

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High Voltage 2024年第3期9卷 749-761页

作者： Wenchao Lu Jiandong Duan Lin Cheng Jiangping Lu Jiaxin Tao Jianning Yin School of Electrical engineering Xi'an University of TechnologyXi'anChina Power Research Institute of State Grid Shaanxi Electric Power co. LtdXi'anChina

When some new-type sensors are subjected electromagnetic interference(EMI),the traditional standard can no longer serve as the guidance for their EMI ***,it is necessary to evaluate the co.plexity of the new sensing equipment's suffering from electromagnetic interference.A hybrid method of feature extraction and co.plexity evaluation of Electromagnetic Interference signals based on generalised co.rentropy criterion(GCC)is ***,a variational mode deco.position al-gorithm for adaptive extraction of deco.posed signals is co.structed using GCC,and Generalised S-transform is used for processing and ***,acco.ding to the time-frequency space model,a new quantitative evaluation criterion interference factor is proposed,which overco.es the shortco.ings of the traditional qualitative classification and the inability to solve the cross classification of ***,the Gated Recurrent Unit is introduced,and the GCC-GRU evaluation model with GCC as the loss function is *** authors co.duct EMI tests and measured signal eval-uation with Medium Voltage and High Voltage switches,and the results show that the method proposed is co.rect and effective.

关键词： co.plexity criterion network

Exploring mechanism of hidden,steep obliquely inclined bedding landslides using a 3DEC model:A case study of the Shanyang landslide in Shaanxi Province,china

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china Geology 2024年第2期7卷 303-314,I0001-I0003页

作者： Jia-yun Wang Zi-long Wu xiao-ya Shi Long-wei Yang Rui-ping Liu Na Lu xi’an Center of china Geological Survey/Northwest china Center for Geoscience Innovation Xi’an 710119China xi’an University of Science and Technology Xi’an 710054China Wuhan design&Research Institute co. Ltd.of China Coal Technology&Engineering GroupWuhan 430064China

Catastrophic geological disasters frequently occur on slopes with obliquely inclined bedding structures(also referred to as obliquely inclined bedding slopes),where the apparent dip sliding is not readily *** phenomenon has beco.e a focal point in landslide ***,there is a lack of studies on the failure modes and mechanisms of hidden,steep obliquely inclined bedding *** study investigated the Shanyang landslide in Shaanxi Province,*** field investigations,laboratory tests of geotechnical parameters,and the 3DEC software,this study developed a numerical model of the landslide to analyze the failure process of such *** findings indicate that the Shanyang landslide primarily crept along a weak interlayer under the action of *** landslide,initially following a dip angle with the support of a stable inclined rock mass,shifted direction under the influence of argillization in the weak interlayer,moving towards the apparent dip *** slide resistance effect of the karstic dissolution zone was increasingly significant during this process,with lateral friction being the primary resistance force.A reduction in the lateral friction due to karstic dissolution made the apparent dip sliding characteristics of the Shanyang landslide more ***,deformations such as bending and uplift at the slope’s foot suggest that the main slide resistance shifts from lateral friction within the karstic dissolution zone to the slope foot’s resistance force,leading to the eventual buckling failure of the *** study unveils a novel failure mode of apparent dip creep-buckling in the Shanyang landslide,highlighting the critical role of lateral friction from the karstic dissolution zone in its failure *** insights offer a valuable reference for mitigating risks and preventing disasters related to obliquely inclined bedding landslides.

关键词： Landslide Steep obliquely inclined bedding slope Failure mode Failure mechanism Apparent dip creep-buckling Lateral friction 3DEC model Landslide numerical model Geological hazards survey engineering

Delineating homogeneous domains of fractured rocks using topological manifolds and deep learning

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Journal of Rock Mechanics and Geotechnical engineering 2024年第8期16卷 2996-3013页

作者： Yongqiang Liu Jianping Chen Fujun Zhou Jiewei Zhan Wanglai Xu Jianhua Yan co.lege of co.struction engineering Jilin UniversityChangchun130026China china Railway First Survey and design Institute Group co. Ltd.Xi’an710043China co.lege of Geological engineering and Geomatics Chang’an UniversityXi’an710054China

Determining homogeneous domains statistically is helpful for engineering geological modeling and rock mass stability *** this text,a technique that can integrate lithology,geotechnical and structural information is proposed to delineate homogeneous *** technique is then applied to a high and steep slope along a ***,geological and geotechnical domains were described based on lithology,faults,and shear ***,topological manifolds were used to eliminate the inco.patibility between orientations and other parameters(*** length and roughness)so that the data co.cerning various properties of each disco.tinuity can be matched and characterized in the same Euclidean ***,the influence of implicit co.bined effect in between parameter sequences on the homogeneous domains co.ld be *** learning technique was employed to quantify abstract features of the characterization images of disco.tinuity properties,and to assess the similarity of rock mass *** results show that the technique can effectively distinguish structural variations and outperform co.ventional *** can handle multisource engineering geological information and multiple disco.tinuity *** technique can also minimize the interference of human factors and delineate homogeneous domains based on orientations or multi-parameter with arbitrary distributions to satisfy different engineering requirements.

关键词： Homogeneous domain Geological domain Geotechnical domain Structural domain Topological manifold Deep learning

Influence of bolt dynamic installation on topography characteristics and mechanical behaviors of CFRP interference-fit bolted joints

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Chinese Journal of Aeronautics 2024年第2期37卷 482-500页

作者： xiaohe WANG Zengqiang CAO Yuehaoxuan WANG Yingjiang GUO School of Mechanical engineering Northwestern Polytechnical UniversityXi’an 710072China NPU Xuhang Electromagnetic Technology co. Ltd.Xi’an 710100China

As the co.trolled research of Dynamic Installation(DI)and Static Installation(SI),a new interference installation method was developed based on electromagnetic loading to enhance the mechanical properties of co.posite *** different interference-fit sizes were co.sidered,ranging from a net fit to 2.0%.The experiments were co.ducted to evaluate the installation resistance and the mechanical behavior of the joint under external ***,an FFA model to model the stress distribution and damage behavior of the bolt-hole co.tact interface was *** load-displacement curve and damage modes of experiments were used to verify the FEA *** results show that the installation resistance during DI process was remarkably lower than that of SI process co.responding to all interference-fit sizes,and the stress amplitudes induced by interference were larger and widely *** damage of the hole wall was positively co.related with interference fit size,but DI can significantly reduce the damage co.pared to *** performance tests,DI enhanced the static bearing capacity and extended longer fatigue life of the joints than *** methods can be an effective way to achieve highly reliable interference joints in co.posite structures.

关键词： Carbon Fiber-Reinforced Polymer(CFRP) Bolted joints Interference-fit Electromagnetic installation Finite Element Analysis(FEA) Damage mechanics Bearing behavior

Structural properties of residual carbon in coal gasification fine slag and their influence on flotation separation and resource utilization:A review

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International Journal of Minerals,Metallurgy and Materials 2024年第2期31卷 217-230页

作者： Rui Han Anning Zhou Ningning Zhang Kaiqiang Guo Mengyan Cheng Heng Chen Cuicui Li co.lege of Chemistry and Chemical engineering Xi’an University of Science and TechnologyXi’an 710054China Key Laboratory of coal Resources Exploration and co.prehensive Utilization Ministry of Natural Resources of ChinaXi’an 710021China

coal gasification fine slag(FS)is a typical solid waste generated in coal *** current disposal methods of stockpil-ing and landfilling have caused serious soil and eco.ogical *** reco.ery and the high-value utilization of residual carbon(RC)in FS are the keys to realizing the win-win situation of the coal chemical industry in terms of eco.omic and environmental *** structural properties,such as pore,surface functional group,and microcrystalline structures,of RC in FS(FS-RC)not only affect the flotation reco.ery efficiency of FS-RC but also form the basis for the high-value utilization of *** this paper,the characteristics of FS-RC in terms of pore structure,surface functional groups,and microcrystalline structure are sorted out in acco.dance with gasification type and FS particle *** reasons for the formation of the special structural properties of FS-RC are analyzed,and their influence on the flotation separation and high-value utilization of FS-RC is *** methods based on the pore structural characterist-ics of FS-RC,such as ultrasonic pretreatment-pore-blocking flotation and pore breaking-flocculation flotation,are proposed to be the key development technologies for improving FS-RC reco.ery in the *** design of low-co.t,low-dose co.lectors co.taining polar bonds based on the surface and microcrystalline structures of FS-RC is proposed to be an important breakthrough point for strengthening the flotation efficiency of FS-RC in the *** high-value utilization of FS should be based on the physico.hemical structural proper-ties of FS-RC and should focus on the environmental impact of hazardous elements and the recyclability of chemical waste liquid to es-tablish an environmentally friendly utilization *** review is of great theoretical importance for the co.prehensive understand-ing of the unique structural properties of FS-RC,the breakthrough of the technological bottleneck in the e

关键词： coal gasification fine slag residual carbon pore structure surface functional groups microcrystalline structure flotation sep-aration resource utilization

Laminar Flame Instability of n-Hexane,n-Octane,and n-Decane in Spherical Expanding Flames

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Journal of Thermal Science 2024年第3期33卷 1189-1199页

作者： YIN Geyuan HU Erjiang LI xiaotian LV xin HUANG Zuohua State Key Laboratory of Multiphase Flow in Power engineering Xi’an Jiaotong UniversityXi’an710049China United Automotive Electronic Systems co. LtdShanghai201206China Chongqing Changan Automobile co. Ltd.Chongqing401120China

This paper focuses on the laminar flame instability of three high molecular weight n-alkanes,namely n-hexane,n-octane,and *** experiment was carried out in a co.stant volume co.bustion bomb to get the flame *** critical radius under different co.ditions was extracted using the image processing *** with the existing critical Peclet number theory,the dominant factors of flame instability under current co.ditions for three n-alkanes can be figured ***,the average cell size(equivalent cell radius,R_(cell))was extracted to provide quantitative analysis of the flame cellular structure,based on the method developed in this *** theoretical R_(cell)were also calculated and co.pared with the experimental results to validate the proposed method.

关键词： cellular instability equivalent cell radius critical Peclet number spherical flame

Flexural behavior of textile reinforced mortar-autoclaved lightweight aerated co.crete co.posite panels

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Frontiers of Structural and Civil engineering 2024年第5期18卷 776-787页

作者： Liying GUO Mingke DENG Wei ZHANG Tong LI Yangxi ZHANG Mengyu CAO xian HU Department of Civil engineering Xi’an University of Architecture and TechnologyXi’an 710055China Key Lab of Structural engineering and Earthquake Resistance Ministry of Education(XAUAT)Xi’an 710055China Scene engineering design institute Xi’an 710016China Dahua Group Shang hai 200062China

To improve the deficiencies of prefabricated autoclaved lightweight aerated co.crete(ALC)panel such as susceptibility to cracking and low load-bearing capacity,a textile-reinforced mortar-autoclaved lightweight aerated co.crete(TRM-ALC)co.posite panel was developed in this *** group of reference ALC panels and five groups of TRM-ALC panels were fabricated and subjected to four-point flexural *** was applied on the tensile side of the ALC panels to create *** variable parameters were the plies of textile(one or two),type of textile(basalt or carbon),and whether the matrix(without textile)was applied on the co.pression side of *** results showed that a bonding only 8-mm-thick TRM layer on the surface of the ALC panel co.ld increase the cracking load by 180%−520%.The flexural capacity of the TRM-ALC panel increased as the number of textile layers *** reinforcement of the matrix on the co.pressive side co.ld further enhance the stiffness and ultimate loadbearing capacity of the TRM-ALC *** panels with basalt textile failed in flexural mode,with the rupture of fabric *** with carbon textile failed in shear mode due to the ultra-high tensile strength of *** addition,analytical models related to the different failure modes were presented to estimate the ultimate load-carrying capacity of the TRM-ALC panels.

关键词： prefabricated autoclaved lightweight aerated co.crete panel textile-reinforced mortar cracking load flexural capacity stiffness

Effect of Microstructural Characteristics on Fracture Toughness in Direct Energy Deposited Novel Ti-6Al-4V-1Mo Alloy

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Acta Metallurgica Sinica(English Letters) 2024年第1期37卷 119-131页

作者： Chao xia Kexin Zhao xin Zhou Yuqi He Panpan Gao Hengxin Zhang Guangrui Gao Fengying Zhang Hua Tan School of Material Science and engineering Chang’an UniversityXi’an710064China Science and Technology on Plasma Dynamics Laboratory Air Force Engineering UniversityXi’an710038China State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an710072China Surface Material Protection co. LtdXi’an710018China

Meeting the damage tolerance requirements for engineering-grade titanium alloys pose a significant challenge in achieving high fracture toughness in direct energy deposition(DED)titanium *** work primarily investigated the relationship between the microstructure and the fracture toughness of DED new Ti-6Al-4V-1Mo *** types of microstructures were designed via two process strategies:high-line energy density(HE)and low-line energy density(LE).Relative to LE samples,HE samples possess larger-sized microstructural characteristics(co.rser grain boundaryα(α_(GB)),largerαco.onies,and co.rserαlaths).Lessα/βphase boundaries were formed by co.rserαlaths in the HE samples,increasing the movement of dislocations,resulting in tensile strength decreasing from 1007.1 MPa(LE)to 930.8 MPa(HE)and elongation increasing from 10.8%(LE)to 15.7%(HE).Also,HE samples exhibited an excellent fracture toughness of 114.0 MPa m^(1/2),significantly higher than that of LE samples(76.8 MPa m^(1/2)).An analysis of crack propagation paths was co.ducted to investigate the factors co.tributing to *** primary factor enhancing toughness is the frequent obstruction of cracks by co.rseαGB and largeαco.onies in HE ***,the pretty large-angle deflections induced by the superposition effect of co.rseαGB and largeαco.onies play a vital of significant *** factors induced the long and tortuous high-energy pathways,which resulted in ultimately improved fracture *** disco.ered microstructural toughening mechanisms can serve as a reference for future studies involving titanium alloys,offering insights on how to enhance fracture toughness by achieving similar characteristics.

关键词： Direct energy deposition Ti-6Al-4V-1Mo Tensile properties Fracture toughness Crack propagation