简介：一个人需要有自己的空间、自己的秘密，这就是朱莉亚的一个愿望。她能否实现这个愿望呢?请看……

简介：InthispaperwemainlydiscussthatSAGBIbasisundercompositionofpolynomials.Poly-nomialcompositionistheoperationofreplacingthevariablesofapolynomialwithotherpolynomials.Themainquestionofthispaperis:DoesthereexistsadecisionprocedurethatwilldeterminewhetberagivencompositioncommuteswithSAGBIbasiscomputationunderagiventermordering?Wewillgiveabetteranswer(usingelementaryrationalrowtransformationsofmatrice).

简介：Formally,nationalsovereigntycanbeideotifiedashardandsoft;social-structurally,itconsistsofpoliticatsovereignty,economicsovereigntyandculturalsovereignty.Withtheglobalizationofworldeconomy,nationalsovereigntyischanging.Ourcountryisnowconfrontedbythreemajorchallenges:theindependenceofeconomicsovereignty,theintegrityofpoliticatsovereigntyandtheequalityofculturalsovereignty.Thisresearchprobeshowtomaximizenationalbenefitsunderglobalization.

简介：Compositionistheoperationofreplacingvariablesinapolynomialwithotherpolynomials.Themainquestioninthispaperis:whendoescompositioncommutewithuniversalGroebnerbasiscomputation?Weprovethatthishappensiffthecompositionissinglevariable.ThishasanaturalapplicationinthecomputationofuniversalGroebnerbasesofcomposedpolynomials.

简介：TheVaR,anewappearingfinancialrisk-managetool,havebeenappliedwidely.ManyfinancialsetupshaveaccustomedtomeasuretheriskofaportfoliowiththeVaR.SoitisverynecessarytodiscusstheportfoliochoiceproblemundertheVaRconstraint.Inthispaper,bysettingandsolvingtheportfoliochoicemodelundertheVaRconstraint,weillustratethattheuseoftheVaRconstraintreducesthearrayofchoicetoamoremanageablerange.TheprobabilityoftragetVaR,therefore,canbethoughtofasarisktoleranceassessmenttool(whencoupledwithanothermeasureofrisk).

简介：

简介：MorseinequalitiesforMorsefunctionsundergeneralboundaryconditionswereinitiallystudiedbyMorseandVanSchaa(?)k.ItisourpurposetopresentanaturalextensionofthetheoremduetoMorseandVanSchaackwithaconsiderablyslmplifiedproof.

简介：Thispapermaintainsthatthetrendtowardeconomicglobalisation,alongwiththeresultingexpectationsandcallfortheinternationalisationofaccountingsystems,arethebasisfortheconceptofinternationalizingChineseaccountingeducation.Infact,suchdramaticchangesintheeconomicandbusinessenvironmenthavetriggeredsuggestionsformajorchangesintheaccountingprofessionfromtheeighteconomiccoordinationorganisationsandinternationalaccountingbodies,whichfurtherreinforcesthenotionofinternationalisation.Ourcurrentaccountingpedagogyshouldreforminordertoreflecttheinternationalisationofaccountingeducation.

简介：ThispaperstudiesthedynamicresponsesofSDOFsystemunderpulse-dominantexcitations.Thepurposeofthestudyistoprepareforscrutinyofsomenear-fieldpulse-dominantgroundmotionsandtheirpotentialtocausestructuraldamage.Extendingthesinglepulsedynamics,weconsidertheeffectofpulsesequences.ThiskindofexcitationwasparticularlyobviousinsomeofpreviousearthquakessuchasNorthridge(1994)andChi-Chi(1995).Basedontheduration,peakandriseanddecayeraofthemainpulseaswellasitsrelationshipwiththepredecessorandsuccessorpulses,weproposeaclassificationforthepulsesequences.Consequentstudieshavebeencarriedoutforacceleration,velocityanddisplacementresponsespectraofthemainpulsewitheitherapredecessororasuccessorpulse.Theanalysisalsoincludesgeneralresponsebehaviorsindifferentfundamentalperiodsegmentsandspecialaspectsofresponseatcertainpoints(e.g.,thecorrespondingpeakpoints).

简介：<正>TheHexiCorridorstretchingwestwardsfromLanzhouinGansuProvincewasChina’slandconnectionwithCentralAsia.Virtuallyanarrowpassagebetweenthesnow-cappedQilianMountainstothesouthandthewaterlessdeserttothenorthitishometothehistoricalSilkRoad.ItwasalsostrategicinthedefenceofAncientChina.RecentlyItravelledalongthisroutebyovernighttrainfromLanzhoutothe’GreatestPassunderHeaven’,Jiayuguan.Todaythismoderncityof100,000

简介：FourgianthydraulicturbinesofYantanHydropowerSta-tionlocatedontheHongshuiRiver,GuangxiProvincearenowunderconstructionbytheHarbinElectricMachineryWorks(HEMW)ofChinaHarbinPower-PlantEquipmentCorporation(GROUP).TheturbinewillbecomethelargestindimensionforFrancistypeturbineevermadeinChina.Theexternaldiameteroftherunneris8.6m,whichissupposedtoberankedNo.3amongthelargestrunnersofthiscategoryintheworld.Eachturbineisrated

简介：Thestrengthoflightweightconcreteundertriaxialcompressivestressisstudiedexperimentallywiththeconcretetriaxialapparatusdesignedbytheauthors,andiscomparedwiththatofnormalconcreteunderthesamestressstate.Ninety-five100mmcubesundertwentystressratiosaretested.Ascomparedwithnormalconcrete,itisfoundthatnotonlythemultiaxialcompressivestrengthoflightweightconcreteissmall,butalsotheratioofthemultiaxialcompressivestrengthtotheuniaxialcompressivestrengthissmall.Theinfluenceoftheintermediateprincipalstressonthemultiaxialstrengthoflightweightconcreteisdiscussed.Thestrengthcriteriawhichareexpressedintheprincipalstressesandtheoctahedralstressesrespectivelyareproposed.

简介：

简介：Thepile-soilsystemisregardedasavisco-elastichalf-spaceembeddedpile.Basedonthemethodofcontinuummechanics,anonlinearmathematicalmodelofpilesoilinteractionwasestablished-acouplingnonlinearboundaryvalueproblem.Underthecaseofhorizontalvibration,thenonlinearlydynamicalcharacteristicsofpileapplyingtheaxisforcewerestudiedinhorizontaldirectioninfrequencydomain.Theeffectsofparameters,especiallytheaxisforceonthestiffnesswerestudiedindetail.Thenumericalresultssuggestthatitispossiblethatthepileapplyinganaxisforcewillloseitsstability.So,theeffectoftheaxisforceonthepileisconsidered.

简介：Objective:ToinvestigatethedynamicsofplasmacAMP/Cgmpinpatientsduringcardiacsurgery,anditsrelationshiptotraumaticstress.Methods:Sixteenpatients,aged19.31years±10.4years,whounderwentanopenheartoperationwithcardiopulmonarybypass(CPB)andhypothermiawereservedassubjects.Thearterialplasmaconcentrationsofcyclicadenosinemonophosphate(Camp)andcyclicguanosinemonophosphate(Cgmp)weremeasuredbyradioimmunoassay2hoursbeforeoperation,afterheparinization,20minutesfollowingCPB,attheendoftheoperation,and24and72hourspostoperatively,respectively.Thepatients'preoperativebloodsampleswereheparinizedandthevenousbloodsamplesof30healthyblooddonorsweretakentomeasurethelevelsofCampandcGMPasheparinandnormalcontrolsseparately.Results:Therewerenostatisticaldifferenceamongtheheparincontrol,preoperativelevelandnormalcontrol.ThepeakvaluesofCampandCgmpoccurredduringCPBandplasmaCamplevelschangedsynchronouslywithintensitiesofoperativestimulustohumanbody.HowevercGMPlevelwasmainlyrelatedtotheoperativestimulustotheheartandCPB.TheCampvaluewaspositivelycorrelatedwiththeCgmpvalue(r=0.6313,P＜0.001).Conclusions:Dynamicvariationofplasmacyclicribonucleotidecanbeconsideredasareferenceparameterforintensityoftraumaticstress.

简介：Thepurposeofthispaperistodiscusshowthevalueofhigh-techfirmcanberationallyvaluedbytakingintoaccountmanagerialflexibilitywhenitsfuturerevenueisuncertain,therebythefirm'smanagercanmakerationalinvestmentdecisionS.Usingstochasticcontroltheory,thepaperwillpresentthatthefirm'svaluesatisfiesapartiallydifferentiateequation,andanalyzethemanagerialflexibilityvaluewithinaframeworkofreal-optionanalytictheorey.Finally,thecomparativestaticanalysisandthemodel'ssimpleapplicationaregiven.

简介：

简介：Aredsoil,afluvo-aquicsoilandapermeablepaddysoilwereusedinalong-terminvestigationtostudychangesinnitrificationwithtreatments:1)soilincubation,2)liquidincubationinoculatedwithsoilsamples,and3)liquidincubationinoculatedwithammonia-oxidizingbacteria(AOB)fromthesoils.Thereweresignificantdifferences(P＜0.001)innitrificationratesamongthethreesoilswhenmeasuredfor28daysbyadding(NH4)2SO4attherateof154mgNkg-1drysoiltofreshsoil.However,theamountsofnitrifyingbacteriainthethreesoilswerenotrelatedtosoilnitrificationcapacity.WhenthesoilsamplesortheisolatesofAOBenrichedfromthecorrespondingsoilwereincubatedinliquidwithpH5.8,7.0and8.0buffersand10mmolL-1ammoniumnitrogen,therewerenosignificantnitrificationdifferencesinthesamesoiltypeateachpH.TheabilitytooxidizeammoniathroughAOBfromdifferenttypesofsoilsinahomogeneousculturemediumwassimilar,andthesoilnitrificationcapacitycouldreflecttheinherentpropertiesofasoil.AlteringtheculturemediumpHofindividualsoiltypealsoshowedthatacidificationofanalkalinefluvo-aquicsoildecreasednitrificationcapacity,whereasalkalinizationoftheacidicredsoilandpermeablepaddysoilincreasedtheirnitrification.Forabetterinsightintofactorsinfluencingsoilnitrificationprocesses,soilpropertiesincludingtextureandclaycompositionshouldbeconsidered.

简介：TheIraqwarandtheNorthKoreannuclearcrisisarethetwobigeventsthatareattractingworldwideattention.Themanydebatesandchangesthathavearisenaroundtheglobefromthesetwoissues,withtheformerinparticular,cannotbutcauseeverypersonwhoisinterestedininternationalaffairsandcaresforthefateoftheirrespectivecountriestoponder:willinternationalpolitiesand

简介：AnFEanalysisprocedurewaspresentedtopredictthebehaviorofsoilogeogridinterctionunderautomobileloading.Thedynamicinteractionsbetweenthetransversebars,thelongitudinalribsandthesoilweresimulatedbyasystemconsistingofnonlinearsprings,dashpotsandmasses,tostudythedeformationpropertiesofthereinforcedsoil.Theequivalentstiffnessanddampingratioscouldbedeterminedwiththeshakingtable.Thedynamicresponsesofareinforcedsubgradewereanalyzedwiththe3Dfiniteelementapproach.Thisapproachisprogrammedandappliedtoanalyzethesoilogeogridinteractionunderdynamicloading.Thecomparativeanalysisoftheresponseofthereinforcedsubgradeandthatofthesubgradewithoutreinforcementshowsthatthegeogridplacedatthebottomofthebaselayermayeffectivelyreducetheaccumulativeplasticdeformationduetothecyclicautomobileloading.