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简介：InthispaperconservationlawsofnonholonomicnonconservativedynamicalsystemsarestudiedbyusingthedifferentialvariationalprinciplesofJourdainandthegeneralizedNoether’sidenti-tiesofnonconservativesystemssubjecttofirstordernonlinearnonholonomicconstraintsareprovided.

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简介：ThepresentsituationofforesttreegeneticgermplasmresourcesresearchandconservationinChinaisintroducedwhichincludingthebackground,decision-makingofconservationstrategiesandprinciples,theplanofareadivisionandtreespeciesclassification,thesamplestrategyofgermplasmconservation,theadvancesinconservationpatternandrelatedtechnologiesresearch,theachievementsofgermplasmconservationandutilizationinChina,andtheproblemstobesolved.Therecentachievementsa...

简介：§1.IntroductionItisveryimportanttostudythetheoryofthemultidimensionalhyperbolicconservationlaws.Atypicalmodelisthefollowinginitialvalueproblem

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简介：AccordingtostatisticsconductedbytheEnvironmentBureauofT.A.R，Tibethasestablished7differentconservationareasatnationallevel,8atprovinciallevel,and23atsub-provinciallevel.Thetotalconservationareareachesto407,000sqkm,ThisnumberaccountsforonethirdoftA.R,andranksnumberoneinChina.

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简介：Watersavinganddevelopingwaterconservationsocietyarethetwokeystrategiesbothforwisewaterallocationandsustainableutilization.Thepaperanalysestheconnotationofwatersavingandwaterconservationsociety.Essentially,watersavingmeansfreeingupwaterfromnon-beneficialusesandprovidingittosomemoreproductiveuses.Basicprinciplesforsettingindicatorarepresentedbyprovidingefficientuseofwater,consideringsocialissuesandecologicalprotection.Anintegratedassessingwatersavingsystemaimingatmoresustainableandefficientconsumptionisgivenconsideringunbalancedsocialandeconomicdevelopmentinregionsandbasins.Thehierarchyindicatorsystemprovidesqualifiedtoolstothepracticeofwaterconservationandevaluatesthevalueforwaterconservationsocietyconstruction.

简介：介绍改进熵生产的估计的证明的一个方法因为(TVD)一般全部的变化减少策划。TVD计划的一般理论的元素；为严格的凸的能量守恒定律获得第二个顺序resolution-TVD计划的一个班的熵不平等的基础；分离的熵不平等的定义。

简介：Byintroducingthegeneralizedquasi-symmetryoftheinfinitesimaltransformationfortransformationgroupG,,thispaperstudiestheconservationlawsandsymmetriesofdynamicalsystemswithunilateralconstraintsinphasespace.Noether’stheoremandNoether’sinversetheoremforme-chanicalsystemswithunilateralconstraintsinphasespaceareobtainedandtwokindsofequivalentformsofgeneralizedKillingequationswhichareusedtodeterminethe8eneratorsoftheinfinitesimalgrouptransformationaregiven.

简介：Theauthorsgiveaproofoftheconvergenceofthesolutionoftheparabolicapproximationu^εt+divf(x,t,u^ε)=ε△u^εtowardstheentropicsolutionofthescalarconservationlawut+divf(x,t,u)=0inseveralspacedimensions.Foranyinitialconditionu0∈L^∞(R^N)andforalargeclassofHuxf,theyalsoprovethestrongconvergeinanyL^plocspace,usingthenotionofentropyprocesssolution,whichisageneralizationofthemeasure-valuedsolutionsofDiPerna.

简介：ByA.PeresandA.Stern'sopinionsacomputationalprocessevolvesalongacycliclogicorbitdefinedbyacomputation.A.Sternthoughtthatifwecoulddesignsuchacircuit,itsoperationscanbeextendedtoincludingnonconservativebehaviorassociatedwiththeexternalperturbationsorinternalquantumerrors.A.PeresdidnotdiscusshowtomakeφM-1＝φo.A.Sternproposedonlyanecessaryconditionforaconservationofastateofaquantumcircuit.Inthispaperwepresentanecessaryandsufficientconditionforauniversalconservationofastateofaquantumcircuit.Wealsofindalloperatorswhichcanallowtheconservation.

简介：Anewdiscreteisospectralproblemisintroduced,fromwhichthecoupleddiscreteKdVhierarchyisdeducedandiswritteninitsHamiltonianformbymeansofthetraceidentity.ItisshownthateachequationintheresultinghierarchyisLiouvilleintegrable.Furthermore,aninfinitenumberofconservationlawsareshownexplicitlybydirectcomputation.

简介：ＭＡＳＳＣＯＮＳＥＲＶＡＴＩＯＮＢＥＨＡＶＩＯＲＯＦＷＡＶＥＥＱＵＡＴＩＯＮＭＯＤＥＬＦＯＲＳＯＬＶＩＮＧＳＨＡＬＬＯＷＷＡＴＥＲＥＱＵＡＴＩＯＮ￥ＷｕＪｉａｎ－ｋａｎｇ（ＨｕａｚｈｏｎｇＵｎｉｖｅｒｓｉｔｙｏｆＳｃｉｅｎｃｅａｎｄＴｅｃｈｎｏｌｏｇ...

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简介：调查一个明确的迎风的有限元素方法的集中，平均边的有限元素方法到多维的分级的能量守恒定律。有限元素计划和主要集中定理的讨论；技术词根的证明。

简介：Thepurposeistoreestablishthecoupledconservationlaws,thelocalconservationequationsandthejumpconditionsofmassandinertiaforpolarcontinuumtheories.Inthisconnectionthenewmaterialderivativesofthedeformationgradient,thelineelement,thesurfaceelementandthevolumeelementwerederivedandthegeneralizedReynoldstransporttheoremwaspresented.Combiningtheseconservationlawsofmassandinertiawiththebalancelawsofmomentum,angularmomentumandenergyderivedinourpreviouspapersofthisseries,arathercompletesystemofcoupledbasiclawsandprinciplesforpolarcontinuumtheoriesisconstitutedonthewhole.Fromthissystemthecouplednonlocalbalanceequationsofmass,inertia,momentum,angularmomentumandenergymaybeobtainedbytheusuallocalization.

简介：SongRong(i.e.Matsutake,Tricholomamatsutake)isthemostfavoriteediblemushroominJapanandrestrictedlydistributesinforestsinEastAsia.TheyieldofSongRong,however,hasbeenextremelydroppingsince1940'sintheregionduetochangesofenvironmentalecologyofnatureforests.Asacompensationforconsumption,JapanimportedproductsofT.matsutakefromKoreaandChina,andT.magnivelarefromNorthAmericasincemid-1970s,butT.matsutakestiliaccountsforalargeportionofthe...