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High-t.mperat.re oxidat.on behaviour of minor Hf-dopedβ-NiAI single cryst.ls in dry and humid at.ospheres

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Rare Met.ls 2023年第8期42卷 2767-2773页

作者： Kai Yan Jian He Hong-bo Guo School of Aut.mat.on Science and Elect.ical Engineering Beihang UniversityBeijing 100191China St.t. Key Laborat.ry of Virt.al Realit. t.chnology and Syst.ms Beihang UniversityBeijing 100191China School of Energy and Power Engineering Beihang UniversityBeijing 100191China School of Mat.rials Science and Engineering Beihang UniversityBeijing 100191China

Oxidat.on behaviour of undopedβ-NiAl andβ-NiAl-0.05Hf single cryst.ls were invest.gat.d at.1100℃in 20 vol%O_(2)+Ar and 15 vol%H2O+Ar,*** cont.ary t. t.e well-known beneficial effect.of Hf addit.ons on t.e oxidat.on behaviour of polycryst.llineβ-NiAl,severe-scale spallat.on is observed forβ-NiAl-0.05Hf single-cryst.l alloy,especially in dry *** is proposed t.at.t.e presence of t.e grain boundaries in t.e polycryst.lline subst.at. enables proper cont.nt.of Hf segregat.ng at.t.e grain boundaries of t.e oxide scale and at.t.e scale-subst.at. int.rface,which promot.s t.e condit.ons required for react.ve element.*** t.e react.ve element.effect.of Hf does not.work,it. st.ong affinit. wit. oxygen will accelerat. t.e process of high-t.mperat.re ***,t.e absence of t.e grain boundaries as fast.diffusion pat.s part.ally compromises t.e adverse influence of wat.r vapour on cyclic oxidat.on resist.nce ofβ-NiAl single cryst.l,result.ng in considerable suppression of t.e oxidat.on rat. and less loss of prot.ct.on compared wit. t.at.in dry *** addit.on,int.rfacial cavit.es are observed in dry and humid at.ospheres,which may event.ally result.in t.e spallat.on of t.e oxide scale.

关键词： Oxidat.on React.ve element Wat.r vapour β-NiAl Grain boundary

Development.and Challenges of Elect.ode Ionomers Used in t.e Cat.lyst.Layer of Prot.n-Exchange Membrane Fuel Cells:A Review

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t.ansact.ons of t.anjin Universit. 2023年第5期29卷 360-386页

作者： Qingnuan Zhang bo Wang School of Chemist.y and Chemical Engineering Beijing Institute of TechnologyBeijing 100081China

t.e elect.ode ionomer plays a crucial role in t.e cat.lyst.layer(CL) of a prot.n-exchange membrane fuel cell(PEMFC) and is closely associat.d wit. t.e prot.n conduct.on and gas t.ansport.propert.es,st.uct.ral st.bilit.,and wat.r management.*** t.is review,we discuss t.e CL st.uct.ral charact.rist.cs and highlight.t.e lat.st.advancement. in ionomer mat.rial ***,we comprehensively int.oduce t.e design concept. and except.onal performances of porous elect.ode ionomers,elaborat. on t.eir st.uct.ral propert.es and funct.ons wit.in t.e fuel cell CL,and invest.gat. t.eir effect.on t.e CL microst.uct.re and ***,we present.a prospect.ve evaluat.on of t.e development. in t.e elect.ode ionomer for fabricat.ng CL,offering valuable insight. for designing and synt.esizing more efficient.elect.ode ionomer *** addressing t.ese facet.,t.is review cont.ibut.s t. a comprehensive underst.nding of t.e role and pot.nt.al of elect.ode ionomers for enhancing PEMFC performance.

关键词： Elect.ode ionomer Prot.n conduct.on Oxygen t.ansport.resist.nce Cat.lyst.layer Prot.n-exchange membrane fuel cell

All-solid-st.t. pseudocapacit.ve micro-supercapacit.rs from laser-t.eat.d polymer derivat.ves

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Chinese Chemical Let.ers 2018年第4期29卷 596-598页

作者： Zhi Huang bo Yuan College of Power Engineering Chongqing University Chongqing 400044 China School of Energy & Environment.l Engineering University of Science & Technology Beijing Beijing 400044 China

We report.a simple met.od for fabricat.ng all-solid-st.t. micro-supercapacit.rs, ut.lizing laser writ.ng t.chnology. Porous graphene films wit. t.ree-dimensional net.orks induced by laser from commercial polymer was act.d as scaffold for loading MnO2, a t.pical pseudocapacit.ve mat.rials. Using gel elect.olyt., all-solid-st.t. pseudocapacit.ve micro-supercapacit.rs were fabricat.d. Compare t. t.adit.onal print.ng and lit.ography t.chniques produced micro-supercapacit.rs, t.e as-fabricat.d devices demonst.at. high volumet.ic capacit.nces, good st.bilit. and low leakage current. indicat.ng a scalable and facile approach for fut.re energy st.rage devices in port.ble microelect.onics.

关键词： Micro-supercapacit.rs All-solid-st.t. Laser t.chnology Pseudocapacit.ve Microelect.onics

FEASIBLE St.DY ON t.E INt.GRAt.ON SYSt.M FOR t.E SPACE MONIt.RING OF MAJOR EARt.QUAKES AND VOLCANOES IN t.RRESt.IAL LAND

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Chinese Geographical Science 2002年第4期12卷 350-353页

作者： bo Li-qun(Changchun Inst.t.t. of Geography,t.he Chinese Academy of Sciences,Changchun 130012,P.R.China) Changchun Inst.t.t. of Geography the Chinese Academy of Sciences Changchun P. R. China

Wit. t.e rapid development.of space t.chnology,eart. observat.on t.ch nology and sky observat.ry t.chnolo-gy,t.ey have played a more and more im port.nt.part.in monit.ring and predi ct.ng of eart.quakes and volcanoes i n t.e t.rres-t.ial *** recent.years,t.e rela t.d agencies have done t.e experimen t. and researches on monit.ring and p redict.ng of eart.quakes and volcanoes in t.e forewarning period by means of many appr oaches,such as sat.llit. t.ermal in frared re-mot. sensing(t.RS),Global Posit.oning Syst.m(GPS),different.al int.rferomet.ic syn t.esis apert.re radar(D-INSAR),ast.onomical t.me-lat.t.de residual anomaly,and Geographic Informat.on Syst.ms (GIS),et..A quit. large number of re-search foundat.on has been built.in t.he fundament.l t.eories and applica t.on *** experiment. and re searches have shown t.at.t.ese t.chnology is e fficient.met.ods for high frequency crust.*** t.e exist.d separat. scient.fic forces and result. are possibly asse mbled t.get.er t. form a more complet. int.grat.on monit.ring syst.m wit.h t.e combina-t.on of space,sky observat.on,grou nd,deep geology and macro anomaly,i t.will come int. a new st.ge of monit.ring and predict.ng of eart.quakes and volca nic erupt.ons.

关键词： space t.chnology int.grat.on syst.m eart.quake and volcano

Mult.ple Posit.ve Solut.ons for Semi-posit.ne m-point.boundary Value Problems

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Act. Mat.emat.cae Applicat.e Sinica 2011年第3期27卷 419-426页

作者： Cheng-bo Zhai Cheng Yang School of Mat.emat.cal Science Shanxi University Shanxi 030006 China Business College of Shanxi Universit. Shanxi 030031 China

In t.is art.cle, we est.blish t.e exist.nce of at.least.t.o posit.ve solut.ons for t.e semi-posit.ne m-point.boundary value problem wit. a paramet.r u （t. ＋ λf （t. u） = 0, t.∈ （0, 1）, u （0） = sum （biu （ξ i ）） from i=1 t. m-2, u（1）= sum （aiu（ξ i ）） from i=1 t. m-2, where λ 〉 0 is a paramet.r, 0 〈 ξ 1 〈 ξ 2 〈 ··· 〈 ξ m 2 〈 1 wit. 0 〈sum ai from i=1 t. m-2 〈 1, sum bi from i=1 t. m-2 =1 b i 〈 1, a i , b i ∈ [0, ∞） and f （t. u） ≥ M wit. M is a posit.ve const.nt. t.e met.od employed is t.e Legget.-Williams fixed-point.t.eorem. As an applicat.on, an example is given t. demonst.at. t.e main result.

关键词： Mult.ple posit.ve solut.ons cone semi-posit.ne m-point.boundary value problem,concave funct.onal paramet.r

Dimensional effect. of organic anion t.mplat.s in modulat.ng t.e assembly of wat.r clust.rs in cucurbit.6]uril supramolecular syst.ms

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Chinese Chemical Let.ers 2016年第3期27卷 417-422页

作者： bo Li Xu-Zhuo Sun College of Chemist.y and Chemical Engineering Henan University of Technology

t.o new supramolecular archit.ct.res {（HC2O4）2^2- [C6H（18）N2^2＋ C（36）H（36）N（24）O（12）]} 12H2O（1） and{（C6H5SO3）22 [C6H（18）N22＋ C（36）H（36）N（24）O（12）]} 12H2O（2） were synt.esized and charact.rized by singlecryst.l X-ray diffract.on, t.ermogravimet.ic analysis and X-ray powder diffract.on. Compound 1cont.ins infinit. t.o dimensional（2D） L18（8）14（8）8（4） t.pe anion–wat.r aggregat.s [（HC2O4）4（H2O）（22）]^4- and result. in t.e const.uct.on of sandwich-like t.ree dimensional（3D） net.orks. In compound 2, honeycomb-like t.ree dimensional（3D） net.orks are fabricat.d by one dimensional（1D）＂W＂-like t.（0）A2 t.pe anion–wat.r clust.rs [（C6H5SO3）（H2O）6]^-. t.ese result. indicat. t.at.anionic groups play a crucial role in modulat.ng t.e st.uct.res of wat.r clust.rs wit. t.eir spat.al st.uct.re and binding sit.s. In t.ese t.o st.uct.res, t.e majorit. of int.ract.ons are O...H and H...H int.ract.ons on t.e Hirshfeld surface, which means t.at.hydrogen bonding and hydrophobic int.ract.ons are t.e dominat. drive forces in forming t.ese supramolecular syst.ms.

关键词： Cucurbit.ril Supramolecular Wat.r clust.rs Anion t.mplat.s Pseudorot.xane

A likely candidat. of t.pe Ia supernova progenit.rs: t.e X-ray pulsat.ng companion of t.e hot.subdwarf HD 49798

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Research in Ast.onomy and Ast.ophysics 2010年第7期10卷 681-688页

作者： bo Wang Zhan-Wen Han Nat.onal Ast.onomical Observat.ries / Yunnan Observat.ry Chinese Academy of Sciences Kunming 650011 China Key Laborat.ry for t.e St.uct.re and Evolut.on of Celest.al Object. Chinese Academy of Sciences Kunming 650011 China Graduat. Universit. of Chinese Academy of Sciences Beijing 100049 China

HD 49798 is a hydrogen deplet.d subdwarf 06 st.r and has an X-ray pulsat.ng companion （RX J0648.0-4418）. t.e X-ray pulsat.ng companion is a massive whit. dwarf. Employing Egglet.n＇s st.llar evolut.on code wit. t.e opt.cally t.ick wind assumpt.on, we find t.at.t.e hot.subdwarf HD 49798 and it. X-ray pulsat.ng companion could produce a t.pe Ia supernova （SN Ia） in fut.re evolut.on. t.is implies t.at.t.e binary syst.m is a likely candidat. of an SN Ia progenit.r. We also discuss t.e possibilit.es of some ot.er WD ＋ He st.r syst.ms （e.g. V445 Pup and KPD 1930＋2752） for producing SNe Ia.

关键词： binaries close -- st.rs individual (HD 49798) -- st.rs evolut.on -- supernovae general -- whit. dwarfs

St.engt.en Vanadium Alloy by Aging and It. t.ermal St.bilit.

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Southwestern Institute of Physics Annual Report

Sout.west.rn Inst.t.t. of Physics Annual Report 2004年第1期 105-108页

作者： CHEN Jiming t. Muroga t. Nagasaka QIU Shaoyu ZHANG Fu LI Chong LIANG bo XU Zengyu 不详 Nat.onal Inst.t.t. for Fusion Science Oroshi Toki Gifu 509 - 5292 Japan Nat.onal Key Laborat.ry for Nuclear Fuel and Mat.rials P. O. Box 436 Chengdu 610041 China

V-4Cr-4t. is t.e leading candidat. vanadium alloy for fusion applicat.ons as st.uct.ral mat.rial of first.wall and blanket. Due t. t.e int.ract.on bet.een t. and int.rst.t.al solut.s of C, N, and O, precipit.t.on occurs at.elevat.d t.mperat.re. t.e behavior has been st.died in t.e past.few years by short.t.me annealing and result. showed t.at.it.may great.y affect.it. mechanical propert.es t.-CON t.pe precipit.t.s, appearing at. 700℃ in t.e solid-solut.on annealed alloy in high number densit. and small size, st.engt.en t.e alloy significant.y and reduce it. duct.lit.. As t.e duct.lit. reduct.on is in an accept.ble level, t.e st.engt.ening might.be ut.lized for a light.and st.ong vanadium alloy st.uct.re. Before a conclusion, uncert.int. of it. t.ermal st.bilit. should be st.died during t.e high t.mperat.re serves. Besides, seldom has been st.died for t.e effect.of long t.me aging on precipit.t.on behavior and t.nsile propert.es of t.e alloy.

关键词： Vanadium alloy Precipit.t.on hardening t.nsile propert.

Classificat.on of Posit.ve Solut.ons t. a Divergent.Equat.on on t.e Upper Half Space

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Act. Mat.emat.ca Sinica,English Series 2022年第3期38卷 499-509页

作者： Jin Ge YAO Jing bo DOU School of Mat.emat.cs and St.t.st.cs Shaanxi Normal UniversityXi’an710119P.R.China

In t.is paper we classify t.e posit.ve solut.ons of t.e divergent.equat.on wit. Neumann boundary on t.e upper half space{-div(t.(α)∇u)=t.(β)f(u),(y,t.∈R^(n+1)_(+),lim t.0^(+)t.(α)■u/■t.0 by t.e met.od of moving spheres and Kelvin t.ansformat.ons,where n≥1,α>0,β>−1,n−1/n+1β≤αt.ve cont.nuous funct.on sat.sfying some *** equat.on arises from a weighed Sobolev inequalit. involving divergent.operat.r div(t.(α)∇u)on t.e upper half space.

关键词： Divergent.operat.r Liouville t.eorem Neumann boundary met.od of moving spheres Kelvin t.ansformat.on