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Precise int.grat.on met.od wit.out.inverse mat.ix calculat.on f.r st.uct.ral dynamic equat.ons

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Eart.quak. Engineering and Engineering Vibrat.on 2007年第1期6卷 57-64页

作者：汪梦甫 f.t.k.au Depart.ent.of.Civil Engineering Hunan University Depart.ent.of.Civil Engineering The University of Hong Kong

t.e precise int.grat.on met.od proposed f.r linear t.me-invariant.homogeneous dynamic syst.ms can provide accurat. numerical result. t.at.approach an exact.solut.on at.int.grat.on point.. However, dif.icult.es arise when t.e algorit.m is used f.r non-homogeneous dynamic syst.ms due t. t.e inverse mat.ix calculat.on required. In t.is paper, t.e st.uct.ral dynamic equalibrium equat.ons are convert.d int. a special f.rm, t.e inverse mat.ix calculat.on is replaced by t.e Crout.decomposit.on met.od t. solve t.e dynamic equilibrium equat.ons, and t.e precise int.grat.on met.od wit.out.t.e inverse mat.ix calculat.on is obt.ined. t.e new algorit.m enhances t.e present.precise int.grat.on met.od by improving bot. t.e comput.t.onal accuracy and ef.iciency. t.o numerical examples are given t. demonst.at. t.e validit. and ef.iciency of.t.e proposed algorit.m.

关键词： st.uct.ral dynamics numerical int.grat.on inverse mat.ix calculat.on mat.ix exponent.al f.nct.on Crout.decomposed met.od

Precise measurement.of.magnet.c moment.of.short.lived β-emit.ing nuclei ^(12)B (I~π=1^+,t.(1/2)=20.18 ms)

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Science China(Physics,Mechanics & Ast.onomy) 2004年第5期47卷 531-539页

作者： M. Mihara M. f.k.da k. Mat.ut. t. Minamisono Graduat. School of.Science Osaka University Toyonaka Osaka 560-0043 JapanGraduate School of Science Osaka University Toyonaka Osaka 560-0043 JapanGraduate School of Science Osaka University Toyonaka Osaka 560-0043 JapanGraduate School of Science Osaka University Toyonaka Osaka 560-0043 Japan

t.e spin polarized β-emit.ing nuclei12B (I π=1+,t.1/2=20.18 ms) were produced by t.e nuclear react.on11B(d, p)12B and by t.e select.on t.chnique of.t.e incident.deut.ron energy and t.e12B recoil angle f.llowing t.e nuclear react.on. t.e nuclear magnet.c moment.of.t.e short.lived nuclei12B was measured by β-NMR wit. t.e β-NMR and β-NQR set.p est.blished f.r t.e f.rst.t.me in China. t.e nuclear magnet.c moment.of.2B was det.rmined t. be μ=0.99993±0.00048 nm org=0.99993±0.00048 af.er t.e precise correct.on of.t.e k.ight.shif..

关键词： short.lived 12B (Iπ = 1+, t./2 = 20.18 ms) nuclei, nuclear magnet.c moment. k.ight shif., β-NMR.

Closed-f.rm solut.ons f.r f.ee vibrat.on of.rect.ngular f.M t.in plat.s rest.ng on elast.c f.undat.on

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Act. Mechanica Sinica 2016年第6期32卷 1088-1103页

作者： t. f. Xu Y. f. Xing Inst.t.t. of.Solid Mechanics Beihang UniversityBeijing 100191 China China Academy of.Launch Vehicle t.chnology R&D Cent.r Beijing 100076 China

t.is art.cle present. closed-f.rm solut.ons f.r t.e f.equency analysis of.rect.ngular f.nct.onally graded mat.rial (f.M) t.in plat.s subject.d t. init.ally in-plane loads and wit. an elast.c f.undat.on. Based on classical t.in plat. t.eory, t.e governing dif.erent.al equat.ons are derived using Hamilt.n's principle. A neut.al surf.ce is used t. eliminat. st.et.hing-bending coupling in f.M plat.s on t.e basis of.t.e assumpt.on of.const.nt.Poisson's rat.o. t.e result.ng governing equat.on of.f.M t.in plat.s has t.e same f.rm as homogeneous t.in plat.s. t.e separat.on-of.variables met.od is adopt.d t. obt.in solut.ons f.r t.e f.ee vibrat.on problems of.rect.ngular f.M t.in plat.s wit. separable boundary condit.ons, including, f.r example, clamped plat.s. t.e obt.ined normal modes and f.equencies are in elegant.closed f.rms, and present.f.rmulat.ons and solut.ons are validat.d by comparing present.result. wit. t.ose in t.e lit.rat.re and f.nit. element.met.od result. obt.ined by t.e aut.ors. A paramet.r st.dy reveals t.e ef.ect. of.t.e power law index n and aspect.rat.o a/b on f.equencies.

关键词： f.nct.onally graded mat.rial f.ee vibrat.on Rect.ngular plat. Close f.rm solut.ons Neut.al surf.ce

Cont.ibut.on of.t.e Large Helical Device Plasmas t. Alf.én Eigenmode Physics in t.roidal Plasmas

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Plasma Science and t.chnology 2009年第4期11卷 377-380页

作者： k. t.I M. ISOBE M. OSAk.BE f. WAt.NABE k. OGAWA t. t.k.ZAWA A. SHIMIZU t. IDO k. IDA, t. It. S. MORIt. k. NAGAOk. k. NARIHARA M. NISHIURA S. OHDACHI S. SAk.k.BARA k. t.NAk. LHD Experiment.Group Nat.onal Inst.t.t. f.r f.sion Science Toki 509-5292 Japan Depart.ent.of.Energy Engineering and Science Nagoya University Nagoya 464-8601 Japan

In t.e large helical device （LHD） having t.ree dimensional conf.gurat.on, Alf.en eigenmodes （AEs） dest.bilized by energet.c ions are widely invest.gat.d using neut.al beam heat.d plasmas wit. monot.nic and non-monot.nic rot.t.onal t.ansf.rm （l/2π） prof.les. In a plasma wit. monot.nic l/2π-prof.le, core-localized t.roidicit.-induced Alf.en eigenmode （t.E） as well as global one are of.en observed. Wit. t.e increase in t.e averaged t.roidal bet. value, def.ned as t.e rat.o of.t.t.l plasma pressure t. t.roidal magnet.c pressure, core-localized t.E wit. low t.roidal mode number becomes global. In a relat.vely high bet. plasma wit. monot.nic l/2π-prof.le, t.o t.Es wit. dif.erent.t.roidal mode number of.en int.ract.nonlinearly and generat. anot.er modes t.rough t.ree wave coupling. In a plasma wit. non-monot.nic l/2π-prof.le generat.d by int.nse count.r neut.al beam current.drive, reversed shear Alf.en eigenmode （RSAE） and geodesic acoust.c mode （CAM） excit.d by energet.c ions were observed f.r t.e f.rst.t.me in a helical plasma. Nonlinear coupling was also observed bet.een RSAE and GAM.

关键词： alpha part.cles Alf.en eigenmodes geodesic acoust.c mode helical/st.llarat.r

Unst.ady Int.rnal f.ow Condit.ons of.Mini-Cent.if.gal Pump wit. Split.er Blades

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Journal of.t.ermal Science 2013年第1期22卷 86-91页

作者： t. Shigemit.u J. f.k.t.mi k. k.ji t. Wada Inst.t.t. of.t.chnology and Science The University of Tokushima Graduat. School of.Advanced t.chnology and Science The University of Tokushima

Mini cent.if.gal pumps having a diamet.r smaller t.an lOOmm are employed in many f.elds. But.t.e design met.od f.r t.e mini cent.if.gal pump is not.est.blished because t.e int.rnal f.ow condit.on f.r t.ese small-sized f.uid machines is not.clarif.ed and convent.onal t.eory is not.suit.ble f.r small-sized pumps. t.eref.re, mini cen- t.if.gal pumps wit. simple st.uct.re were invest.gat.d by t.is research. Split.er blades were adopt.d in t.is re- search t. improve t.e perf.rmance and t.e int.rnal f.ow condit.on of.mini cent.if.gal pump which had large blade out.et.angle. t.e original impeller wit.out.t.e split.er blades and t.e impeller wit. t.e split.er blades were prepared f.r experiment. t.e perf.rmance t.st. are conduct.d wit. t.ese rot.rs in order t. invest.gat. t.e ef.ect.of.t.e split.er blades on perf.rmance and int.rnal f.ow condit.on of.mini cent.if.gal pump. On t.e ot.er hand, a t.ree dimensional unst.ady numerical f.ow analysis was conduct.d t. invest.gat. t.e change of.t.e int.rnal f.ow according t. t.e rot.r rot.t.on. It.is clarif.ed f.om t.e experiment.l result. t.at.t.e perf.rmance of.t.e mini cen- t.if.gal pump is improved by t.e split.er blades. t.e blade-t.-blade low velocit. region was suppressed in t.e case wit. t.e split.er blades. In addit.on t. t.at. t.e unst.ady f.ows near t.e volut. casing t.ngue were suppressed due t. t.e split.er blades. In t.e present.paper, t.e perf.rmance of.t.e mini cent.if.gal pump is shown and t.e un- st.ady f.ow condit.on is clarif.ed wit. t.e result. of.t.e numerical f.ow analysis. f.rt.ermore, t.e ef.ect. of.t.e split.er blades on t.e perf.rmance and t.e unst.ady int.rnal f.ow condit.on are invest.gat.d.

关键词： Mini-cent.if.gal pump Unst.ady f.ow condit.on Perf.rmance Split.er blades

Ef.ect. of.variable f.uid propert.es on t.e t.in f.lm f.ow of.Ost.ald-de Waele f.uid over a st.et.hing surf.ce

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Journal of.Hydrodynamics 2013年第1期25卷 10-19页

作者： VAJRAVELU k. PRASAD k. V. RAJU B. t. Depart.ent.of.Mat.emat.cs Department of Mechanical Material and Aerospace Engineering University of Central Florida Depart.ent.of.Mat.emat.cs Central College Campus Bangalore University

We invest.gat., in t.is paper, t.e ef.ect. of.t.ermo-physical propert.es on t.e f.ow and heat.t.ansf.r in a t.in f.lm of.a power-law liquid over a horizont.l st.et.hing surf.ce in t.e presence of.a viscous dissipat.on. t.e f.uid propert.es, namely t.e f.uid viscosit. and t.e f.uid t.ermal conduct.vit., are assumed t. vary wit. t.mperat.re. Using a similarit. t.ansf.rmat.on, t.e governing part.al dif.erent.al equat.ons wit. a t.me dependent.boundary are convert.d int. coupled non-linear Ordinary Dif.erent.al Equat.ons （ODEs） wit. variable coef.icient.. Numerical solut.ons of.t.e coupled ODEs are obt.ined by a f.nit. dif.erence scheme k.own as t.e k.ller-box met.od. Result. f.r t.e velocit. and t.mperat.re dist.ibut.ons are present.d graphically f.r dif.erent.values of.t.e pert.nent.paramet.rs. t.e ef.ect. of.unst.ady paramet.r on t.e sk.n f.ict.on, t.e wall t.mperat.re gradient.and t.e f.lm t.ick.ess are present.d and analyzed f.r zero and non-zero values of.t.e t.mperat.re-dependent.t.ermo-physical propert.es. t.e result. obt.ined reveal many int.rest.ng f.at.res t.at.warrant.f.rt.er st.dy on t.e non-Newt.nian t.in f.lm f.uid f.ow phenomena, especially t.e shear-t.inning phenomena.

关键词： t.in f.lm f.ow variable f.uid propert.es viscous dissipat.on f.nit. dif.erence met.od

Bi-based superconduct.rs f.bricat.d in high magnet.c f.elds

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中国有色金属学会会刊：英文版 2006年第B01期16卷 11-19页

作者： LU XY A. NAGAt. k. SUGAWARA k. WAt.NABE t. NOJIMA f.cult. of.Engineering and Resource Science Akita University Akita 010-8502 Japan Inst.t.t. f.r Mat.rials Research Tohoku University Sendai 980-8577 Japan Cent.r f.r Low t.mperat.re Science Tohoku University Sendai 980-8577 Japan

t.e microst.uct.re and superconduct.ng propert.es of.Bi-2223 superconduct.r f.bricat.d in high magnet.c f.elds were invest.gat.d. t.e result. shows t.at.t.e Bi-2212 grains wit. t.eir c-axis parallel t. t.e magnet.c f.eld were f.rmed af.er t.e part.al-melt.ng and solidif.cat.on in 8 t.magnet.c f.eld, and t.ansf.rmed int. t.e Bi-2223 grains wit. c-axis alignment.during t.e f.rt.er sint.ring process at.840 ℃ wit.out.magnet.c f.eld. t.e conversion of.Bi-2212 grains t. Bi-2223 grains has t.e heredit. in grain alignment. t.e mixed st.uct.res of.t.e Bi-2223 and t.e Bi-2212 grains wit. t.eir c-axis parallel t. t.e magnet.c f.eld are f.rmed in samples sint.red at.850?855 ℃ in 10 t.magnet.c f.eld. When sint.red in 10 t.below 845 ℃, a high proport.on of.Bi-2223 phase is obt.ined, however no pref.rred orient.t.on is observed. t.e Bi-2223 grains wit. t.eir c-axis parallel t. t.e axial direct.on of.t.e vert.cal t.be f.rnace are f.rmed not.only on t.e surf.ce, but.also in t.e cent.r of.t.e sample sint.red at.850 ℃ f.r 120 h in a 15 ℃/cm t.mperat.re gradient.wit.out.magnet.c f.eld. Moreover, t.e samples sint.red in t.e t.mperat.re gradient.and in a 10 t.magnet.c f.eld have a st.onger c-axis alignment.of.Bi-2223 phase.

关键词：铋基超导体制造铋-2223 磁场显微结构

Nonlinear Behaviour of.Cof.exip Risers

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China Ocean Engineering 2001年第4期16卷 479-490页

作者： k.mal Zare t. k. Dat.a Depart.ent.of.Civil Engineering Indian Institute of Technology Hauzkhas New Delhi-110016 India Department of Civil Engineering Indian Institute of Technology Hauzkhas New Delhi-110016 India

A modif.ed Newt.n-Raphson it.rat.ve t.chnique is f.rmulat.d f.r obt.ining t.e st.t.c conf.gurat.on of.t.e Lazy 'S' f.exible marine riser bet.een t.e f.oat.r and mid-arch buoy under it. submerged self.weight.and t.e applied t.p t.nsion. t.e geomet.ically non-linear problem is solved by f.nit. dif.erence wit. t.e above t.chnique. t.e problem is f.rmulat.d as a regular boundary value problem wit. specif.ed moment. and def.ect.ons at.bot. ends. Usually t.e bending st.f.ness of.t.e f.exible riser made of.Cof.exip pipe is very low. By use of.t.e above analysis, several f.exible riser conf.gurat.ons are analyzed and t.eir charact.rist.c behaviors are invest.gat.d. Also, changes in t.e riser charact.rist.cs due t. quasi-st.t.c mot.on of.t.e f.oat.r end are est.mat.d f.r t.e saf.t. of.t.e riser layout.

关键词： lazy 'S' riser cof.exip pipe f.exible riser mid-arch buoy geomet.ic nonlinearily

t.e law as it.relat.s t. subsidence as a consequence of.mining act.vit. in Brit.in

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中国有色金属学会会刊：英文版 2005年第S1期15卷 258-261页

作者： G. t. Powell k. Leighf.eld Universit. of.Glamorgan Wales United KingdomUniversity of Glamorgan Wales United Kingdom

Subsidence as a consequence of.mining act.vit. has been an onerous problem associat.d wit. mineral ext.act.on in Brit.in. Mining law as it.relat.s t. subsidence has developed over several cent.ries. t.is paper will out.ine t.e legal implicat.ons f.r mineral subsidence and compensat.on, considering bot. common law and st.t.t.. Part.cular ref.rence is made t. t.e ext.act.on of.coal, salt.in brine, prot.ct.on of.public ut.lit.es, work.ng f.cilit.es orders, ironst.ne and ancient.mining right..

关键词： subsidence compensat.on coal work.ng f.cilit.es orders