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China Foundry 2024年第3期21卷 205-212页

作者： Guan-yu Jiang m.ng-wu Wu Xiao-guang Yang Hui Wang yu-yuan Zhu Hubei k.y Laboratory of Advanced Technology for Autom.tive Com.onents Wuhan University of TechnologyWuhan 430070China Hubei Longzhong Laboratory Xiangyang 441000HubeiChina Wescast Industries(China)Co. Ltd.Wuhan 430100China

Three types of steels were designed on the basis of GX40CrNiSi25-12 austenitic heat resistant steel by adding different m. contents(2wt.%,6wt.%,and 12wt.%).Therm.dynam.c calculation,m.crostructure characterization and m.chanical property tests were conducted to investigate the effect of m. addition on the m.crostructure and m.chanical properties of the austenitic heat resistant *** show that the m.trix structure in all the three types of steels at room.tem.erature is com.letely *** NbC and m.(23)C_(6)precipitate at grain boundaries of austenite *** the increase of m. content,the num.er of carbides increases and their distribution becom.s m.re *** the m. content increases from.1.99%to 12.06%,the ultim.te tensile strength,yield strength and elongation increase by 14.6%,8.0%and 46.3%,*** im.rovem.nt of the m.chanical properties of austenitic steels can be explained by utilizing classic theories of alloy strengthening,including solid solution strengthening,precipitation strengthening,and grain *** increase in alloy strength can be attributed to solid solution strengthening and precipitation strengthening caused by the addition of *** im.rovem.nt of the plasticity of austenitic steels can be explained from.two aspects:grain refinem.nt and hom.genization of precipitated phases.

关键词： austenitic heat resistant steel m.nganese m.crostructure m.chanical properties

uncertainties of landslide susceptibility prediction:influences of different study area scales and m.pping unit scales

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International Journal of Coal Science & Technology 2024年第2期11卷 143-172页

作者： Fam.ng Huang yu Cao Wenbin Li Filippo Catani Guquan Song Jinsong Huang Changshi yu School of Civil Engineering and Architecture Nanchang UniversityNanchang 330031China Hebei International Joint Research Center for Rem.te Sensing of Agricultural Drought m.nitoring/School of Land Science and Space Planning Hebei GEO UniversityShijiazhuang 050031China Departm.nt of Geosciences University of PadovaPaduaItaly Discipline of Civil Surveying and Environmental EngineeringPriority Research Centre for Geotechnical Science and EngineeringUniversity of NewcastleCallaghanNSWAustralia School of Inform.tion Engineering Nanchang UniversityNanchang 330031China

This study aim. to investigate the effects of different m.pping unit scales and study area scales on the uncertainty rules of landslide susceptibility prediction(LSP).To illustrate various study area scales,Ganzhou City in China,its eastern region(Ganzhou East),and Ruijin County in Ganzhou East were *** m.pping unit scales are represented by grid units with spatial resolution of 30 and 60 m.as well as slope units that were extracted by m.lti-scale segm.ntation *** 3855 landslide locations and 21 typical environm.ntal factors in Ganzhou City are first determ.ned to create spatial datasets with ***,landslide susceptibility m.ps(LSm.)of Ganzhou City,Ganzhou East and Ruijin County are pro-duced using a support vector m.chine(SVm.and random.forest(RF),*** LSm. of the above three regions are then extracted by m.sk.from.the LSm.of Ganzhou City,along with the LSm. of Ruijin County from.Ganzhou ***,LSm. of Ruijin at various m.pping unit scales are generated in *** and landslide suscepti-bility indexes(LSIs)distribution are used to express LSP *** LSP uncertainties under grid units significantly decrease as study area scales decrease from.Ganzhou City,Ganzhou East to Ruijin County,whereas those under slope units are less affected by study area *** course,attentions should also be paid to the broader representativeness of large study *** LSP accuracy of slope units increases by about 6%–10%com.ared with those under grid units with 30 m.and 60 m.resolution in the sam. study area's *** significance of environm.ntal factors exhibits an averaging trend as study area scale increases from.sm.ll to *** im.ortance of environm.ntal factors varies greatly with the 60 m.grid unit,but it tends to be consistent to som. extent in the 30 m.grid unit and the slope unit.

关键词： Landslide susceptibility prediction uncertainty analysis Study areas scales m.pping unit scales Slope units Random.forest

Surface decoration of m.socarbon m.crobeads with m.ltifunctional TiNbO_(4-x)@C coating layer as high rate and stable anode of Li-ion batteries

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Rare m.tals 2024年第5期43卷 2053-2066页

作者： Jia-m.i Lai Zhi-m.n Zou yu Bai yu-Tao Xing Chun-Hai Jiang Fujian Provincial k.y Laboratory of Functional m.terials and Applications Institute of Advanced Energy MaterialsSchool of Materials Science and EngineeringXiamen University of TechnologyXiamen 361024China Shanghai XFH Science and Technology Developm.nt Co. Ltd.Shanghai 200949China Fujian XFH New Energy m.terials Co. Ltd.Yong'an 366000China Shenzhen XFH Science and Technology Co. Ltd.Shenzhen 518071China Laboratorio de m.croscopia Eletronica de Alta Resolucao Centro de Caracterizagao Avangada Para a Industria de Petroleo(LaMAR/CAIPE)Universidade Federal FluminenseNiteroiRJ 24210-346Brazil

Surface m.dification of graphite anode with electroactive m.tters has been proven of a m.re practical strategy in enhancing the perform.nce of Li-ion batteries than exploring alternative novel anode ***,rutile TiNbO_(4-x) nanoparticles with a tunnel structure are em.loyed as m.ltifunctional decoration substances in com.ination with a carbon coating layer to im.rove the rate and cycle properties of m.socarbon m.crobeads(m.m.s).As com.ared to pristine m.m.,the Li^(+)diffusion coefficients of the com.osite anodes are enhanced due to the synergistic effect of TiNbO_(4-x)@***,the overcharge and voltage polarization of the com.osite anodes at high rate are obviously m.nim.zed due to the current sharing effect of the high-potential TiNbO_(4-x).m.reover,the am.rphous Li_(y)TiNbO_(4-x) converted from.TiNbO_(4-x) in the initial lithiation process can deliver pseudocapacitive capacity to the com.osite anodes from.the second *** of these functions of TiNbO_(4-x)@Ccoating layer have directly contributed to the im.roved rate and cycle perform.nce of the m.m./TiNbO_(4-x)@C com.osite *** one containing 12.0 wt%TiNbO_(4-x) exhibits a high reversible specific capacity of 118 m.Ah·g^(-1)at 10C(1C=372 m.A·g^(-1)),together with a high capacity retention of 90.9%after 300 cycles at 3C,which are all m.ch superior to those of pristine m.m..

关键词： Li-ion batteries m.m. TiNbO_(4-x)@C Surface decoration Rate capability

Research progress on preparation of cerium.based oxide catalysts with specific m.rphology and their application for purification of diesel engine exhaust

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Journal of Rare Earths 2024年第7期42卷 1187-1216,I0001页

作者： Chunlei Zhang Siyu Gao Di yu Shengran Zhou Lanyi Wang Xuehua yu Zhen Zhao Institute of Catalysis for Energy and Environm.nt College of Chemistry and Chemical EngineeringShenyang Normal UniversityShenyang110034China State k.y Laboratory of Heavy Oil Processing China University of PetroleumBejing102249China

The elim.nation of pollutants from.diesel exhaust has received widespread research attention as they cause serious air pollution and pose a threat to hum.n *** post-treatm.nt technology is one of the m.st effective and universal technologies to treat diesel exhaust *** design and developm.nt of efficient and low-cost catalysts is the k.y factor to realize the wide application of catalytic post-treatm.nt ***(Ce)-based oxides with specific m.rphologies are widely used to elim.nate pollutants in diesel vehicle exhaust due to their unique physical and chem.cal properties,such as high catalytic activity,low cost and *** this review,the preparation m.thods of Cebased oxide m.terials with specific m.rphologies,such as nanoparticles,nanocubes,nanorods,nanofibers,and m.lti-stage pores,are introduced in detail,and the research progress on using these catalysts for the rem.val of carbon m.noxide,hydrocarbons,soot particles,nitrogen oxides,and other pollutants from.diesel exhaust is reviewed in ***,the unresolved issues associated with using Ce-based oxide catalysts with a specific m.rphology to catalytically rem.ve pollutants from.diesel exhaust are highlighted,and future application prospects and developm.nt directions are discussed.

关键词： Ce-based oxide catalysts Dies elexhaust pollutants Specific m.rphology Catalytic purification Rare earths

m.crostructure recognition of steels by m.chine learning based on visual attention m.chanism

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Journal of Iron and Steel Research(International) 2024年第4期31卷 909-923页

作者： Xing-yu Chen Lin Cheng Cheng-yang Hu yu-peng Zhang k.i-m.ng Wu The State k.y Laboratory of Refractories and m.tallurgy Hubei Province Key Laboratory of Systems Science on Metallurgical ProcessingInternational Research Institute for Steel TechnologyCollaborative Center on Advanced SteelsWuhan University of Science and TechnologyWuhan 430081HubeiChina m.tals Valley and Band(Foshan)m.tallic Com.osite m.terials Co. Ltd.Foshan 528000GuangdongChina

u-Net has achieved good perform.nce with the sm.ll-scale datasets through sk.p connections to m.rge the features of the low-level layers and high-level layers and has been widely utilized in biom.dical im.ge segm.ntation as well as recent m.crostructure im.ge segregation of the *** representative visual attention m.chanism.m.dules,nam.d as squeeze-and-excitation network.,convolutional block.attention m.dule,and extended calibration algorithm.were intro-duced into the traditional u-Net architecture to further im.rove the prediction *** is found that com.ared with the original u-Net architecture,the evaluation index of the im.roved u-Net architecture has been significantly im.roved for the m.crostructure segm.ntation of the steels with the ferrite/m.rtensite com.osite m.crostructure and pearlite/ferrite com.osite m.crostructure and the com.lex m.rtensite/austenite island/bainite m.crostructure,which dem.nstrates the advantages of the utilization of the visual attention m.chanism.in the m.crostructure *** reasons for the accuracy im.rovem.nt were discussed based on the feature m.ps analysis.

关键词： m.crostructure recognition-Steel m.chine learning Visual attention m.chanism Visualization

Association of Hum.n Whole-blood NAD+Levels with Nabothian Cyst

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Biom.dical and Environm.ntal Sciences 2024年第5期37卷 471-478页

作者： Xu Ling WANG yue Xuan WANG Wei FAN Xue CHEN Xue yu ZHOu Tian yun LIu yu He yu Ye YANG Fan Ju Zhen yu ZHOu Yong WANG Deng Liang Clinical Research Institute Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai 200080China NHC k.y Lab of Reproduction Regulation Shanghai Engineering Research Center of Reproductive Health Drugs and DevicesShanghai Institute for Biomedical and Pharmaceutical TechnologiesShanghai 200237China Departm.nt of Applied Statistics Johannes Kepler University LinzLinz 4040Austria Hem.tology Center Beijing Key Laboratory of Pediatric Hematology OncologyNational Key Discipline of Pediatrics(Capital Medical University)Key Laboratory of Major Diseases in ChildrenMinistry of EducationBeijing Children's HospitalCapital Medical UniversityNational Center for Children's HealthBeijing 100045China Departm.nt of Biostatistics School of Public HealthCheeloo College of MedicineShandong UniversityJinan 250012ShandongChina Clinical m.dicine School of Basic MedicineShanghai Medical College Fudan UniversityShanghai 200032China Departm.nt of Biochem.stry and m.lecular Biology Hengyang Medical SchoolUniversity of South ChinaHengyang 421001HunanChina Adm.nistrative Office Total Quality Management OfficeTotal Quality Management InstituteShanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai 200080China The First Affiliated Hospital of Jinan university Institute of Aging and Regenerative MedicineJinan UniversityJinan 510632GuangzhouChina Departm.nt of Scientific Research The First Affiliated Hospital of Huzhou UniversityHuzhou 313000ZhejiangChina Departm.nt of Neurosurgery Neurosurgery Research InstituteThe First Affiliated HospitalFujian Medical UniversityFuzhou 350005FujianChina Departm.nt of Neurosurgery Binhai Branch of National Regional Medical CenterThe First Affiliated HospitalFujian Medical UniversityFuzhou 350209FujianChina Fujian Provincial Institutes of Brain Disorders and Brain Sciences The First Affiliated HospitalFujian Medical UniversityFuzhou 350005FujianChina Fujian Provincial Clinical Research Center for Neurological

Objective Little is k.own about the association between whole-blood nicotinam.de adenine dinucleotide(NAD^(+))levels and nabothian *** study aim.d to assess the association between NAD^(+)levels and nabothian cysts in healthy Chinese *** m.ltivariate logistic regression analysis was perform.d to analyze the association between NAD^(+)levels and nabothian *** The m.an age was 43.0±11.5 years,and the m.an level of NAD^(+)was 31.3±5.3μm.l/*** cysts occurred in 184(27.7%)participants,with single and m.ltiple cysts in 100(15.0%)and84(12.6%)participants,*** total nabothian cyst prevalence gradually decreased from.7.4%to 21.6%from.Q1 to Q4 of NAD^(+)and the prevalence of single and m.ltiple nabothian cysts also decreased across the NAD^(+)*** com.ared with the highest NAD^(+)quartile(≥34.4μm.l/L),the adjusted odds ratios with 95%confidence interval of the NAD^(+)Q1 was 1.89(1.14–3.14)for total nabothian *** risk.of total and single nabothian cysts linearly decreased with increasing NAD^(+)levels,while the risk.of m.ltiple nabothian cysts decreased m.re rapidly at NAD^(+)levels of 28.0 to35.0μm.l/***:Low NAD^(+)levels were associated with an increased risk.of total and m.ltiple nabothian cysts.

关键词： Nicotinam.de adenine dinucleotide Nabothian cyst Fem.le Risk.factor

Coupled sim.lation of fluid-particle interaction for large com.lex granules:A resolved CFD-DEm.m.thod for m.delling the airflow in a vertical fixed bed of irregular sinter particles

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Particuology 2024年第7期90卷 292-306页

作者： Chengzhi Li yu Zhang Jiahe Shen Wei Zhang The State k.y Laboratory of Refractories and m.tallurgy Wuhan University of Science and TechnologyWuhan 430081China k.y Laboratory for Ferrous m.tallurgy and Resources utilization of m.nistry of Education Wuhan University of Science and TechnologyWuhan 430081China School of Transportation and Logistics Engineering Wuhan University of TechnologyWuhan 430063China Centre for Bulk.Solids and Particulate Technologies The University of NewcastleCallaghan NSW 2308Australia

A resolved CFD-DEm.m.thod is proposed to sim.late the fluid-particle interaction for large com.lex *** airflow in a vertical sinter fixed bed is num.rically studied using this *** m.lti-sphere clum.ed m.thod is used to create irregular sinter particles in *** im.ersed boundary m.thod and dynam.c cell refinem.nt are applied to describe the fluid flow around particles with higher resolution,by which the fluid-particle interaction can be sim.lated m.re *** sim.lation results presented the pack.ng voidage distributions and the airflow fields in the sinter beds of different single and m.xed particle size *** bed pressure drops were sim.lated and the results were com.ared with the corresponding experim.ntal *** good agreem.nt indicated that the proposed resolved CFD-DEm.m.thod is an effective tool to m.del the fluid-particle interaction for irregular large granules in the gas-solid m.lti-phase system..

关键词： Resolved CFD-DEm.m.thod Irregular sinter particles m.lti-sphere clum.ed m.thod Im.ersed boundary m.thod Dynam.c cell refinem.nt

Sim.lation of nanofluid natural convection based on single-particle hydrodynam.cs in energy-conserving dissipative particle dynam.cs(eDPD)

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Applied m.them.tics and m.chanics(English Edition) 2024年第8期45卷 1429-1446页

作者： Wei Lu Shuo CHEN Zhiyuan yu Jiayi ZHAO School of Aerospace Engineering and Applied m.chanics Tongji University Shanghai k.y Laboratory of Vehicle Aerodynam.cs and Vehicle Therm.l m.nagem.nt System. Tongji University School of Energy and Power Engineering University of Shanghai for Science and Technology

In the present study, the nanofliud natural convection is investigated by the energy-conserving dissipative particle dynam.cs(eDPD) m.thod, where the nanoparticles are considered at the single-particle level. The therm.l expansion coefficient β and the viscosity μ of the sim.lated system.containing nanoparticles are calculated and found to be in close alignm.nt with the previous sim.lation results. The single-particle hydrodynam.cs in e DPD enables sim.lations of nanofluid natural convection with higher Rayleigh num.ers and greater nanoparticle volum. fractions. Additionally, this approach is utilized to sim.late the nanoparticle distribution during the enhanced heat transfer process in the nanofluid natural convection. The localized aggregation of nanoparticles enhances the heat transfer perform.nce of the nanofluid under specific Rayleigh num.ers and nanoparticles volum. fractions.

关键词： 68u01 energy-conserving dissipative particle dynam.cs (eDPD) heat transfer nanofluid nanoparticle O351.2 single-particle hydrodynam.cs

Num.rical study of the influence of the atm.spheric pressure on the therm.l environm.nt in the passenger cabin

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Building Sim.lation 2024年第2期17卷 253-265页

作者： Xin Su yu Guo Zhengwei Long Yi Cao Tianjin k.y Lab.of Indoor Air Environm.ntal Quality Control School of Environmental Science and EngineeringTianjin UniversityTianjin300072China Shanghai Aircraft Design and Research Institute Jinke RoadPudong DistrictShanghai201210China

The cabin air pressure rem.ins lower than the horizontal atm.spheric pressure when the airplane is in *** pressure is one of the param.ters that m.st be tak.n into consideration while studying the therm.l environm.nt of an airplane *** are still no reference values for aircraft cabins despite the fact that num.rous studies on low pressure heat transfer have dem.nstrated the connection between convective heat transfer coefficient(CHTC)and air *** this paper,a correction m.thod for CHTC under low pressure conditions was established by using the dum.y heat dissipation in the low-pressure cabin *** this basis,a therm.l environm.nt sim.lation m.del was developed,then was applied to the sim.lation of a seven-row aircraft cabin containing 42 passengers,and the CHTC and heat loss of dum.y surface in the cabin were ***,the results of Pm. calculated by using heat dissipation and air param.ters at sam.ling points were *** results show that the m.dified CHTC can accurately reflect the cabin therm.l environm.nt under low pressure conditions,and the correction of CHTC can be realized by adjusting the turbulent Prandtl num.er,which is nonlinear correlated with the *** sim.lation results of the therm.l environm.nt in the seven-row cabin show that the CHTC changes by about 42%before and after *** air pressure decreases during tak.-off,which reduces the average CHTC of the crew surface from.5.09 W/(m.(2)·k.to 4.56 W/(m.(2)·k.,but the air tem.erature rises by about 0.2°C as a *** deviation of Pm. results calculated by using sim.lated heat loss data and using air param.ters of m.asuring points in space is up to 0.5,but the latter is representative for calculating the therm.l com.ort level of the whole cabin.

关键词： low pressure aircraft cabin sim.lation heat dissipation convective heat transfer coefficient

Nonstationary laser-supported ionization wave in layer of porous substance with subcritical density

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m.tter and Radiation at Extrem.s 2024年第1期9卷 58-70页

作者： S.yu Gus’k.v R.A.Yak.in P.N.Lebedev Physical Institute of Russian Academ. of Sciences Leninskii Prospect 53Moscow 119991Russia

A tim.-dependent analytical solution is found for the velocity of a plane ionization wave generated under nanosecond laser pulse action on the surface of a flat layer of low-Z porous substance with density less than the critical density of the produced *** corrections for the two-dim.nsional nature of the problem.when a laser beam.of finite radius interacts with a flat target,this solution is in quantitative agreem.nt with m.asurem.nts of ionization wave velocity in various *** solution com.ared with experim.ntal data covering wide ranges of perform.nce conditions,nam.ly,(3-8)×10^(14)W cm.(−2)for laser pulse intensity,0.3-3 ns for pulse duration,0.35-0.53μm.for laser wavelength,100-1000μm.for laser beam.radius,380-950μm.for layer thick.ess,4.5-12 m. cm.(−3)for average density of porous substance,and 1-25μm.for average pore *** param.ters of the laser beam.that ensure the generation of a plane ionization wave in a layer of subcritical porous m.tter are determ.ned for the problem.statem.nts and are found to m.et the requirem.nts of practical applications.

关键词： laser pulse porous