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On Se.f-Adjointne.s of the.Product of Two Se.ond-Orde. Diffe.e.tial Ope.ators

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Acta Mathe.atica Sinica,e.glish Se.ie. 1999年第3期15卷 375-383,385-386页

作者： D. e. e.munds De.artme.t of Mathe.atics Inner Mongolia University Huhhot 010021 P. R. China Centre for Mathematical Analysis and its Applications University of Sussex Palmer Brighton BN1 9QH England

In this pape., the.proble. of se.f-adjointne.s of the.product of two diffe.e.tial ope.ators is conside.e.. A numbe. of re.ults conce.ning se.f-adjointne.s of the.product L2L1 of two se.ond-orde. se.f-adjoint diffe.e.tial ope.ators are.obtaine. by using the.ge.e.al construction the.ry of se.f-adjoint e.te.sions of ordinary diffe.e.tial ope.ators.

关键词： Se.f-adjoint ope.ator Diffe.e.tial ope.ator Product of two diffe.e.tial ope.ators

Re.uce. She.l Mode. Calculations of ^111Sb and ^112Sb

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Chine.e.Physics Le.te.s 2007年第6期24卷 1521-1524页

作者： e. Dikme. T, Akyǖre. De.artme.t of Physics Sǖleyman Demirel University Isparta Turkey

The.low-lying state. of the.mid-he.vy odd-e.e. ^111Sb and odd-odd ^112Sb isotope. are.calculate. for the.first time.within the.she.l mode. frame.ork. The.she.l mode. calculations have.be.n carrie. out within the.re.uce. mode. space.including the.single.particle.orbits ld5/2,097/2, ld3/2, 2Sl/2. We.obtain the.e.e.gy spe.tra for the.^111Sb and ^112Sb isotope. in the.re.uce. mode. space.by using CD-Bonn two-body e.fe.tive.nucle.n-nucle.n inte.action. The.e.e.gy spe.tra are.compare. to the.e.pe.ime.tal re.ults to give.some.discussion about the.low-lying state. of ^111Sb and ^112Sb.

关键词： Calculations Re.uce. Mode.

Quantum Corre.ations in Ising-XYZ Diamond chain Structure.unde. an e.te.nal Magne.ic Fie.d

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Chine.e.Physics Le.te.s 2015年第10期32卷 9-13页

作者： Faizi e. e.te.hari H. De.artme.t of Physics Azerbaijan Shahid Madani University

We.conside. an e.tangle. Ising-XY Z diamond chain structure. Quantum corre.ations for this mode. are.inve.- tigate. by using quantum discord and trace.distance.discord. Quantum corre.ations are.obtaine. for diffe.e.t value. of the.anisotropy parame.e., magne.ic fie.d and te.pe.ature. By comparison be.we.n quantum corre.ations, we.show that the.trace.distance.discord is always large. than quantum discord. Finally, some.nove. e.fe.ts such as incre.sing the.quantum corre.ations with te.pe.ature.and constructive.role.of anisotropy parame.e., which may play to the.quantum corre.ations, are.obse.ve..

关键词： TDD Quantum Corre.ations in Ising-XYZ Diamond chain Structure.unde. an e.te.nal Magne.ic Fie.d

Indicators of δ^(13)C and δ^(18)O of gas hydrate.associate. se.ime.ts

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Chine.e.Scie.ce.Bulle.in 2002年第19期47卷 1659-1663页

作者： e. Sue.s Faculty of e.rth Scie.ce. China University of Geosciences Wuhan China De.artme.t of Marine.e.vironme.tal Ge.logy GEOMAR University of Kiel Kiel Germany

The.analyse. of δ13C and δ18O of gas hydrate.associate. se.ime.ts from two core. on Hydrate.Ridge.in Cascadia conve.ge.t margin offshore.Ore.on, e.ste.n North Pacific show the.value. of δ13C from-29.81‰ to -48.28‰(PDB) and δ18O from 2.56‰to 4.28‰ (PDB), which could be.plotte. into a group calle. typical carbonate.mine.als influe.ce. by the.me.hane.in cold ve.ting. More.ve., the.value. of δ13C and δ18O show a consiste.t tre.d in both core. from top to bottom with incre.sing of δ13C and de.re.sing of δ18O. This tre.d could be.e.plaine. as an e.fe.t cause. by the.anae.obic oxidation of me.hane.(AOM) in de.th and the.oxyge. fraction during the.formation of gas hydrate.in de.th toge.he.. The.e.characte.istics of δ13C and δ18O indicate.that the.gas hydrate.associate. se.ime.ts are.significantly diffe.e.t from the.normal marine.carbonate., and the. are.de.ply influe.ce. by the.formation and e.olution of gas hydrate. So, the.distinct characte.istics of δ13C and δ18O of gas hydrate.associate.

关键词： gas hydrate associate. se.ime.ts δ13C and δ18O indi-cators.

A se.sorle.s and simple.controlle. for VSC base. HVDC syste.s

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Journal of Zhe.iang Unive.sity-Scie.ce.A(Applie. Physics & e.gine.ring) 2009年第12期10卷 1824-1834页

作者： e. ABIRI A. RAHMATI A. ABRISHAMIFAR De.artme.t of e.e.tronic and e.e.trical e.gine.ring Shiraz University of Technology De.artme.t of e.e.tronic and e.e.trical e.gine.ring Iran University of Science and Technology

Voltage.source.conve.te. high-voltage.dire.t curre.t （VSC-HVDC） is a ne. powe. transmission te.hnology pre.- e.able.in small or me.ium powe. transmission. In this pape. we.discuss a ne. control syste. base. on space.ve.tor modulation （SVM） without any voltage.line.se.sors. Using dire.t powe. control （DPC） SVM and a ne. double.synchronous re.e.e.ce.frame.phase.locke. loop （DSRF-PLL） approach, the.control syste. is re.istant to the.majority of line.voltage.disturbance.. Also, the.syste. re.ponse.has acce.e.ate. by using a fe.d forward powe. de.ouple. loop. The.ope.ation of this control strate.y was ve.ifie. in a SIMULINK/MATLAB simulation e.vironme.t. To validate.this control syste., a 5 kV.A prototype.syste. was constructe.. Compare. to the.original controlle.s, the.curre.t total harmonic distortion （THD）, the.active.and re.ctive.de.iations and the.DC voltage.ove.shoot we.e.lowe.e. by 2.5%, 6.2% and 8%, re.pe.tive.y. The.re.tifie. powe. factor in the.worst condition was 0.93 and the.DC voltage.se.tling time.was 0.2 s.

关键词： Voltage.source.conve.te. high-voltage.dire.t curre.t (VSC-HVDC) Space.ve.tor modulation (SVM) Dire.t powe. control (DPC) HVDC Light

Gradie.ts in pre.ation risk in a tropical rive. syste.

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Curre.t Zoology 2018年第2期64卷 213-221页

作者： Amy e. De.CON Faith A. M. JONe. Anne.e. MAGURRAN De.artme.t of Life.Scie.ce. The University of the West Indies St Augustine Trinidad and Tobago School of Biology University of St Andrews Fife KY16 9TH Scotland UK

The.importance.of pre.ation risk as a ke. drive. of e.olutionary change.is e.e.plifie. by the.Northe.n Range.in Trinidad, whe.e.re.e.rch on guppie. living in multiple.paralle. stre.ms has pro- vide. invaluable.insights into the.proce.s of e.olution by natural se.e.tion. Although Trinidadian guppie. are.now a te.tbook e.ample.of e.olution in action, studie. have.ge.e.ally cate.orize. pre.ation as a dichotomous variable. re.re.e.ting high or low risk. Ye., e.ologists appre.iate.that community structure.and the.atte.dant pre.ation risk vary substantially ove. space.and time. He.e. we.use.data from a longitudinal study of fish asse.blage. at 16 diffe.e.t site. in the.Northe.n Range.to quantify te.poral and spatial variation in pre.ation risk. Spe.ifically we.ask： 1） Is the.e.e.ide.ce.for a gradie.t in pre.ation risk？ 2） Doe. the.ranking of site. （by risk） change.with the.de.i- nition of the.pre.ator community （in te.ms of spe.ie. composition and abundance.curre.cy）, and 3） Are.site.rankings consiste.t ove. time. We.find compe.ling e.ide.ce.that site. lie.along a contin- uum of risk. Howe.e., site.rankings along this gradie.t de.e.d on how pre.ation is quantifie. in te.ms of the.spe.ie. conside.e. to be.pre.ators and the.abundance.curre.cy is use.. None.he.e.s, for a give. cate.orization and curre.cy, rankings are.re.ative.y consiste.t ove. time. Our study sug- ge.ts that conside.ation of pre.ation gradie.ts will le.d to a more.nuance. unde.standing of the.role.of pre.ation risk in be.avioral and e.olutionary e.ology. It also e.phasize. the.ne.d to justify and re.ort the.de.inition of pre.ation risk be.ng use..

关键词： abundance.curre.cy gradie.ts Poe.ilia re.iculata pre.ation risk Trinidad Trinidadian guppy.

Se.VICe.ATTRIBUTe.PROCe.S MATRIX： A TOOL FOR De.IGNING AND MANAGING Se.VICe.

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Journal of Syste.s Scie.ce.and Syste.s e.gine.ring 2007年第3期16卷 257-276页

作者： Vassilis A. GLIATIS Ioannis e. MINIS De.artme.t of Financial and Manage.e.t e.gine.ring Business School University of the Aegean 31 Fostini Str. 82100 Chios Greece Fax: +30 - 22710 - 35400

The.growing importance.of the.se.vice.e.onomy during the.last 40 ye.rs has raise. the.ne.d for ne. tools for de.igning and managing se.vice.. As a re.ult, se.e.al authors have.de.e.ope. se.vice.classification syste.s, in orde. to be.te. unde.stand the.nature.of se.vice.ope.ations and provide.me.hods and tools to improve.se.vice.e.ficie.cy and quality. This pape. e.ploits the.work re.ulting from se.vice.classification syste.s and ide.tifie. the.principal attribute. to be.conside.e. in se.vice.manage.e.t. The.tool introduce. for this purpose.is the.Se.vice.Attribute.Proce.s Matrix （SAPM）, which use. se.e.te. re.ults from e.isting se.vice.classification sche.e. to inve.tigate.the.importance.of the.significant se.vice.attribute. to major proce.se. of the.se.vice.life.cycle.

关键词： Classification of se.vice. se.vice.dime.sions se.vice.conce.ts se.vice.de.ign and manage.e.t

Shorte.ing filtrations

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Scie.ce.China Mathe.atics 2012年第4期55卷 687-693页

作者： e.OCHS e.gar e. De.artme.t of Mathe.atics University of Kentucky

Le. C be.a se. of module.. We.argue.that the.e.is an ordinal d such that if a module.has a filtration by module. in g, the. it has a filtration of le.gth k by dire.t sums of module. in C. As an application we.give.ano... 详细信息

关键词： Hill classe. filtrations pre.ove.ing

SWITCHING AND Se.Ue.CING AVAILABLe.THe.APIe. SO AS TO MAXIMIZe.A PATIe.T＇S e.Pe.Te. TOTAL LIFe.IMe

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Inte.national Journal of Biomathe.atics 2012年第4期5卷 113-125页

作者： JOHN e. GOULIONIS De.artme.t of Statistics and Insurance.Scie.ce. Unive.sity of Pirae.s 80 Karaoli a Dimitriou Stre.t 18534 Pirae.s Greece

This pape. has focuse. on applying mathe.atical te.hnique. to addre.s fundame.tal que.tion in the.apy planning whe. to switch, and how to se.ue.ce.the.apie.. We.conside. switching and se.ue.cing available.the.apie. so as to maximize.a patie.t＇s e.pe.te. total life.ime. We.assume.knowle.ge.only about the.life.ime.distributions induce. by the.the.apie.. We.discuss a spe.ialization of this mode. that is tailore. to a fre.ue.tly re.ccurring type.of manage.e.t proble., whe.e.our goal is to de.e.mine.the.be.t timing for te.ting and tre.tme.t de.isions for patie.ts with ische.ic he.rt dise.se. Typically, de.isions are.made.with an ove.all, goal of maximizing the.patie.t＇s e.pe.te. life.ime.or quality-adjuste. life.ime.

关键词： e.pe.te. total life.ime mainte.ance ische.ic he.rt dise.se stochasticorde.ing re.ationships statistical distributions.