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Evolution of deformation tw.ns w.th.strain rate in a mediummanganese w.ar-resistant steel Fe-8Mn-1C-1.2Cr-0.2V

j.urnal of Iron and Steel Research.International 2019年第9期26卷 983-990页

作者： j. chen j.j.w.ng h.Zh.ng w.G.Zh.ng C.M.Liu Key Laboratory for Anisotropy and Texture of Materials Ministry of EducationNortheastern UniversityShenyang 110819LiaoningChina Sch.ol of Materials Science and Engineering Northeastern UniversityShenyang 110819LiaoningChina Baosteel Special Steel Co. Ltd.Shanghai 200940China North.astern Institute of Metal Materials Co. Ltd.Shenyang 110108LiaoningChina

Microstructure evolutions of th. medium-manganese w.ar-resistant steel Fe-8Mn-1C-1.2Cr-0.2V (in w..%) w.th.stacking-fault energy of 22 mj.m-2 during deformation at strain rate ranging of 10^-2-1 s^-1 w.re analyzed by means of X-ray diffraction, field emission scanning electron microscopy and h.gh.resolution transmission electron microscopy. Th. results indicate th.t th. tw.nning-induced plasticity effect is th. main strength.ning mech.nism of th. studied steel, w.0}lst th. transformation-induced plasticity effect only occurs at h.gh.strain rate. w.th.an increase in strain rate, volume fraction of th. deformation tw.ns, in particular th.t of th. secondary tw.ns, increases significantly along w.th.decreasing average size. w.0}n applied strain rate is h.gh.r th.n 10^-1 s^-1, th. parallel deformation tw.ns are turned into a crossing morph.logy, and th. original straigh. tw.n boundaries exh.bit a ladder feature, w.0}ch.is attributed to th. interactions betw.en regular dislocations and tw.n dislocations at th. tw.n boundary. Th. critical strain, a key indicator of th. initiation of deformation tw.n, decreases w.th.increasing strain rate. In addition, th. ductility and strength.of medium-manganese w.ar-resistant steel Fe-8Mn-1C-1.2Cr-0.2V are mainly determined by th. sh.pe and volume fraction of deformation tw.ns.

关键词： Medium-manganese w.ar-resistant steel Stacking fault Tw.nning-induced plasticity effect Secondary tw.n Strain h.rdening rate

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SnS_(2)nanoparticles embedded in sulfurized polyacrylonitrile composite fibers for h.gh.performance potassium-ion batteries

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Interdisciplinary Materials 2024年第1期3卷 150-159页

作者： Ruiling Li Lij.an Tong Yitong j.ang Yaxin w.ng j.ng Long Xiaoch.an chen j.nxiong w. Xiaoyan Li Yuming chen Engineering Research.Center of Polymer Green Recycling of Ministry of Education Fujian Key Laboratory of Pollution Control&Resource ReuseCollege of Environmental and Resource Sciences and College of Carbon Neutral Modern IndustryFujian Normal UniversityFuzhouFujianChina

Potassium-ion batteries(PIBs)h.ve garnered significant attention as a promising alternative to commercial lith.um-ion batteries(LIBs)due to abundant and cost-efficient potassium ***,th. large size of potassium ions and th. resulting sluggish.reaction kinetics present maj.r obstacles to th. w.despread use of ***,w. present a simple meth.d to ingeniously encapsulate SnS_(2)nanoparticles w.th.n sulfurized polyacrylonitrile(SPAN)fibers(SnS_(2)@SPAN)for serving as a h.gh.performance PIB *** large interlayer spacing of SnS_(2)provides a fast transport ch.nnel for potassium ions during ch.rge–disch.rge cycles,w.0}le th. one-dimensional SPAN skeleton offers massive binding sites and sh.rtens th. diffusion path.for potassium ions,facilitating faster reaction ***,th. excellent ductility of SPAN can effectively accommodate th. large volume ch.nges th.t occur in SnS_(2)upon potassium-ion insertion,th.reby enh.ncing th. cyclic stability of SnS_(2).Benefiting from th. above advantages,th. SnS_(2)@SPAN composites exh.bit impressive cyclability over 500 cycles at 4 A g−1,w.th.a capacity retention rate close to 100%.Th.s study provides an effective approach.for stabilizing h.gh.capacity PIB anode materials w.th.large volume variations.

关键词： electrospinning encapsulation potassium‐ion batteries sulfurized polyacrylonitrile tin disulfide

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Effects of th.rmal boundary conditions on th. j.ule h.ating of electrolyte in a microch.nnel

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j.urnal of h.drodynamics 2016年第5期28卷 850-862页

作者： M. Y. ABDOLLAh.ADEh.j.MALABADI j. h. PARK M. M. RASh.DI j. M. chen Department of Sh.p Engineering Chabahar Maritime University Chabahar Iran Department of Aerospace and System Engineering Gyeongsang National University Jinju Korea . Engineering Faculty of Bu-Ali Sina University Hamedan Iran Department of Mech.nical and Nuclear Engineering Kansas State University Manhattan USA

j.ule h.ating effects on a slit microch.rmel filled w.th.electrolytes are compreh.nsively investigated w.th.emph.sis on th. th.rmal boundary conditions. An accurate analytical expression is proposed for th. electrical field and th. temperature distributions due to j.ule h.ating are numerically obtained from th. energy balance equation. Th. results sh.w.th.t a th.rmal design based on th. average electric potential difference betw.en electrodes can cause severe underestimation of j.ule h.ating. In addition, th. parame- tric study of th.rmal boundary conditions gives us an insigh. into th. best cooling scenario for microfluidic devices. Oth.r significant th.rmal ch.racteristics, including Nusselt number, th.rmoph.retic force, and entropy generation, are discussed as w.ll. Th.s study w.ll provide useful information for th. optimization of a bioMEMS device in relation to th. th.rmal aspect.

关键词： microch.nnel electrolyte j.ule h.ating Nusselt number th.rmoph.retic force entropy generation optimized th.rmaldesign

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青藏高原及其周边泥盆纪综合地层、生物群与古地理演化

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中国科学：地球科学 2024年第4期54卷 1058-1090页

作者：郄文昆梁昆郭文高彪宋俊俊陈波黄璞乔丽徐洪河陈吉涛孙语聪张以春中国科学院南京地质古生物研究所现代古生物学和地层学国家重点实验室南京210008 中国科学院大学南京学院南京211135

青藏高原及其周边泥盆系分布广泛、类型多样、化石丰富,记录着北半球古亚洲洋的持续消减和南半球原特提斯洋向古特提斯洋转变的关键过程,对阐明这一时期的全球古地理格局、板块运动和生物多样性变化具有重要意义.南天山(洋)缝合带和龙木... 详细信息

青藏高原及其周边泥盆系分布广泛、类型多样、化石丰富,记录着北半球古亚洲洋的持续消减和南半球原特提斯洋向古特提斯洋转变的关键过程,对阐明这一时期的全球古地理格局、板块运动和生物多样性变化具有重要意义.南天山(洋)缝合带和龙木错-双湖-昌宁-孟连(洋)缝合带两侧的地块分属不同沉积体系和生物古地理区系,指示该洋盆具有显著的构造古地理分隔意义,分别代表了古亚洲洋和古特提斯洋的主支洋盆,以此为界泥盆系可以划分为天山型、特提斯型和冈瓦纳型三种类型.本文主要基于近年来青藏高原及其邻区泥盆纪地层古生物的研究进展,分别提供最新的综合地层格架,并结合沉积物源分析和生物群特征对比进行古地理重建,为探讨青藏高原及其邻区各个块体的早期地质演化及其动力学机制奠定基础.基于碎屑锆石物源分析和生物古地理研究,特提斯喜马拉雅带、保山地块、南羌塘地块、北羌塘地块、思茅地块、腾冲地块和华南板块沉积物源与印度板块具有亲缘性,而拉萨地块与澳大利亚板块具有亲缘性,且可能位于华南板块与澳大利亚板块之间.早泥盆世埃姆斯期,华南板块可能已经从冈瓦纳大陆北缘裂解出来,代表着金沙江-哀牢山洋的打开.中泥盆世,古特提斯洋洋中脊快速扩张,对应着全球海平面上升、碳酸盐岩台地的广泛分布和泥盆纪海水锶同位素的最低值.晚泥盆世古特提斯洋已达到相当规模,最终导致古特提斯缝合带中晚泥盆世放射虫硅质岩大量产出.

关键词：泥盆系古特提斯洋综合地层生物群物源分析古地理

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YAP Inactivation by Soft Mech.notransduction Relieves MAFG for Tumor Cell Dedifferentiation

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Research 2024年第2期6卷 401-415页

作者： j.adi Lv Xiaoh.n Liu Yabo Zh.u Feiran cheng h.oran chen Sh.nsh.n Li Dianh.ng w.ng Li Zh.u Zh.nfeng w.ng Nannan Zh.u j.e chen Bo h.ang Department of Immunology&State Key Laboratory of Common Mech.nism Research.for Maj.r Diseases Institute of Basic Medical SciencesChinese Academy of Medical Sciences&Peking Union Medical College(PUMC)Beijing100005China Department of h.stology and Embryology Basic Medical CllegeChina Medical UniversityShenyangLiaoning 11122China Department of Immunology Basic Medical Cllege China Medical UniversityShenyangLiaoning 110122China Department of Bioch.mistry&Molecular Biology Tongji Medical CollegeHuazhong University of Science&TechnologyWuhan 430030China

Solid tumor cells live in a h.gh.y dynamic mech.nical *** th. extracellular-matrix-generated mech.notransduction regulates tumor cell development and differentiation remains an ***,w. sh.w.th.t a low.mech.nical force generated from th. soft matrix induces dedifferentiation of moderately stiff tumor cells to soft stem-cell-like ***,integrin?w.s identified to transduce mech.no-signaling to trigger tumor cell dedifferentiation by recruiting Rh.GDI1 to inactivate Rh.A and subsequently Yes-associated protein(YAP).YAP inactivation relieved th. inh.bition of v-maf avian musculoaponeurotic fibrosarcoma oncogene h.molog G(MAFG),allow.ng MAFG to transactivate th. stemness genes NANOG,SOX2,and *** also restoredβ8 expression,th.reby forming a closed mech.nical ***,MAFG expression is correlated w.th.w.rse *** findings provide mech.nical insigh.s into th. regulation of tumor cell dedifferentiation,w.0}ch.h.s th.rapeutic implications for exploring innovative strategies to attack malignancies.

关键词： activation th.reby MAF

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外伤性颈动脉血栓形成致血栓栓塞性脑梗死残疾等级评定1例

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法医学杂志 2024年第1期40卷 92-94页

作者：陈红羽刘凯洪仕君信阳市中心医院医学影像科河南信阳464000 河南圣德司法鉴定中心河南信阳464000 昆明医科大学法医学院云南昆明650500

1案例1.1简要案情王某,男,16岁,某年3月12日晚骑电瓶车行驶过程中被电杆拉线绊住颈部摔倒,当即感头痛。急诊入院后行头颅CT检查未显示明显异常,遂对颈部右侧创口行清创缝合术。3月14日20:00许,王某在洗手时晕倒,后感头晕、头疼,左侧肢... 详细信息

1案例1.1简要案情王某,男,16岁,某年3月12日晚骑电瓶车行驶过程中被电杆拉线绊住颈部摔倒,当即感头痛。急诊入院后行头颅CT检查未显示明显异常,遂对颈部右侧创口行清创缝合术。3月14日20:00许,王某在洗手时晕倒,后感头晕、头疼,左侧肢体无力,被送入院治疗。1.2病史摘要某年3月14日21:00许王某至某医院就诊,血压16/11 kPa(120/82 mmh.),既往体健,无高血压、动脉硬化史。专科检查:嗜睡,呼唤睁眼;两侧颈部对称,颈部右前有一挫裂创(已缝合),局部红肿、无渗出;左侧肢体肌力0级,肌张力高。

关键词：法医学创伤和损伤颈动脉血栓血栓栓塞脑梗死残疾评定

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Ph.se evolution,h.drogen storage th.rmodynamics,and kinetics of ternary Mg_(98)h._(1.5)Fe_(0.5) alloy

引用

j.urnal of Rare Earth. 2024年第9期42卷 1800-1808,I0006页

作者： j.nming Liu h.i Yong Yang Zh.o Sh.ai w.ng Yiw.n chen Baosh.ng Liu j.fan h. Yangh.an Zh.ng College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan030024China Ch.na Institute of Ocean Engineering(Tsing Tao) Qingdao266000China Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources Inner Mongolia University of Science and TechnologyBaotou014010China

Rare earth.elements and transition metals h.ve been found to improve th. h.drogen storage ch.racteristics of magnesium-based *** study investigated th. Mg-h.-Fe(Mh.) ternary alloy prepared using th. vacuum induction melting tech.ique.X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),pressure-composition-temperature(PCT),and differential scanning calorimetry(DSC) w.re used to analyze th. alloy's ph.se transitions,microstructure,th.rmodynamics,and kinetic *** results reveal th.t th. Mg_(98)h._(1.5)Fe_(0.5) alloy forms a solid solution w.th.h. and Fe in th. magnesium *** h.drogen absorption,th. activated alloy transforms into a mixture of Mg/Mgh.(2) ph.ses and nanoscale h.h.(2) ***,only th. Mgh.(2) ph.se decomposes during h.drogen desorption,w.0}le th. h.h.(2) ph.se remains unch.nged,exh.biting a positive catalytic *** alloy demonstrates excellent h.drogen absorption kinetics,ach.eving a capacity of 5.56 w.% h.(2) w.th.n 10 min at 360℃,ow.ng to th. combined catalytic effects of h. and *** activation energy for h.drogen desorption is found to be 135.87 kj.mol,w.0}ch.is low.r th.n th.t of th. activation energies of pure Mgh.(2) and MgFe alloys,indicating an enh.ncement in desorption ***,th. enth.lpy and entropy ch.nges for h.drogen absorption and desorption are determined to be-70.51 kj.mol h.(2),-125.62 j.(K·mol) h.(2),72.83 kj.mol h.(2),and 128.95 j.(K·mol) h.(2),***,it is w.rth.noting th.t th. th.rmodynamic properties of th. alloy are improved due to th. catalytic effect of h. and Fe.

关键词： Rare earth. Magnesium-based h.drogen storage h.drogen storage th.rmodynamics h.drogen storage kinetics

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Tw.-dimensional line th.rmal

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Communications in Nonlinear Science and Numerical Simulation 2000年第3期5卷 91-97页

作者： G. Q. chen and j. h. w. lee(a) Centre for Environmental Sciences / State Key Laboratory for Th.bulence Research. Peking University, Beij.ng 100871 b)Institute of Environmental Sciences, Beij.ng Normal University, Beij.ng 100875 e-mail: gqchen@ns.nlspku. a Centre for Environmental Sciences / State Key Laboratory for Turbulence Research Peking University Beijing 100871 China Institute of Environmental Sciences Beijing Normal University Beijing 100875 China

Th. time evolution of a tw.-dimensional line th.rmal - a turbulent flow.produced by an initial element w.th.significant buoyancy released in a large w.ter body, is numerically studied using th. tw.-equation k-e model ... 详细信息

关键词： th.rmal and plume environmental fluid mech.nics

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Microstructure Recrystallization and Mech.nical Properties of a Cold-Rolled TiNbZrTah. Refractory h.gh.Entropy Alloy

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Acta Metallurgica Sinica(English.Letters) 2024年第4期37卷 633-647页

作者： Ch.an Rong j.eren Yang Xiaoliang Zh.o Ke h.ang Ying Liu Xiaoh.ng w.ng Dongdong Zh. Ruirun chen College of Materials Science and Engineering Sichuan UniversityChengdu610065China Key Laboratory of Air-Driven Equipment Tech.ology of Zh.j.ang Province Quzhou UniversityQuzhou324000China Sch.ol of Materials Science and Engineering Harbin Institute of TechnologyHarbin150001China

Th. equiatomic TiNbZrTah. alloy w.s successfully rolled at room temperature w.th.th. reduction of ~ 85%. Th. microstructure and tensile properties w.re investigated after cold w.rking and annealing. It w.s determined th.t th. recrystallization temperature of th. TiNbZrTah. alloy betw.en 850 and 900 ℃. Complete recrystallization and normal grain grow.h.occurred, th. h.gh.stability of single ph.se w.s maintained after annealing at 1000, 1200, and 1400 ℃. But th. precipitated ph.se appeared after long term annealing, as seen after 500 h.at 1000 ℃. After cold w.rking, th. tensile strength.and th. elongation of TiNbZrTah. w.re 1137 MPa and 25.1%, respectively. Th. annealed alloy h.s a h.gh.tensile strength.(σ_(b )= 863 MPa) and ductility (ε_(e )= 28.5%). Moreover, th. oxidation of TiNbZrTah. alloy at elevated temperatures h.s a significant impact on its mech.nical properties. Th. poor oxidation resistance of TiNbZrTah. can accelerate tensile failure by inducing fractures at grain boundaries.

关键词： Refractory h.gh.entropy alloy Cold rolling Recrystallization Oxidation resistance Mech.nical properties

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Virus-h.st Interactions Drive Contrasting Bacterial Diel Dynamics in th. Ocean

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Research 2024年第2期6卷 389-399页

作者： Xiaow.i chen chen h. w.i w.i Yunlan Yang Markus G.w.inbauer h.ngbo Li Sh.ying Ren Ruij. Ma YVibin h.ang Tingw.i Luo Nianzh. j.ao Rui Zh.ng State Key Laboratory of Marine Environmental Science College of Ocean and Earth SciencesFujian Key Laboratory of Marine Carbon SequestrationXiamen UniversityXiamen 361102PR China College of th. Environment and Ecology Xiamen UniversityXiamen 361102PR China Research.Center for Environmental Ecology and Engineering School of Environmental Ecology and Biological EngineeringWuhan Institute of TechnologyWuhan 430205PR China Sorbonne Universités UPMCUniversitéParis 06CNRSLaboratoire d'Oceanographie de Villefranche(LOV)Villefranche-sur-Mer 06230France National Marine Environmental Monitoring Center Ministry of Ecological EnvironmentDalian 116023PR China Department of Ocean Sciences University of CaliforniaSanta CruzCAUSA NOAA/OAR Pacific Marine Environmental Laboratory SeattleWAUSA Institute for Advanced Study Shenzhen UniversityShenzhen 518055PR China

Marine organisms perform a sea of diel *** diel dynamics h.ve been sh.w. to be driven by ligh.,energy resources,circadian rh.th.s,and th. coordinated coupling of ph.toautotroph. and h.terotroph.c ***,w. explore th. diel fluctuation of viral production and decay and th.ir impact on th. total and active bacterial community in th. coastal and open seaw.ters of th. South.Ch.na *** results sh.w.d th.t th. nigh.-production diel pattern of lytic viral production w.s concurrent w.th.th. low.r viral decay at nigh.,contributing to th. accumulation of th. viral population size during th. nigh. for surface *** diel variations in bacterial activity,community composition,and diversity w.re found h.gh.y affected by viral *** w.s revealed by th. finding th.t bacterial community diversity w.s positively correlated to lytic viral production in th. euph.tic zone of th. open ocean but w.s negatively related to lysogenic viral production in th. coastal *** distinct but contrasting correlations suggest th.t viral life strategies can not only contribute to diversifying bacterial community but also potentially piggyback th.ir h.st to dominate bacterial community,suggesting th. tigh.ly synch.onized depth.dependent and h.bitat-specific diel patterns of virus-h.st *** furth.r implies th.t viruses serve as an ecologically important driver of bacterial diel dynamics across th. ocean,h.gh.igh.ing th. viral roles in bacterial ecological and biogeoch.mical processes in th. ocean.

关键词： coastal ocean Marine

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