简介：

简介：

简介：Basedonthefirstlawofthermodynamicsandthethermaldiffusionequation,thededucedtheoreticalmodelofmitochondrialthermogenesissatisfiestheLaplaceequationandisaspecialcaseofthethermaldiffusionequation.Themodelsettlesthelong-standingquestionoftheabilitytoincreasecellulartemperaturebyendogenousthermogenesisandexplainsthethermogeniccharacteristicsofbrownadipocytes.Themodelandcalculationsalsosuggestthatthenumberoffreeavailableprotonsisthemajorlimitingfactorforendogenousthermogenesisanditsspeed.

简介：

简介：投稿要求：本刊只接收尚未在国内外公开发行的中英文刊物上发表过的、具有创造性研究结果的最新研究论文、简报和快讯，以及少量综述性论文。凡已向国内外其它刊物投稿的相同内容的文章，请勿再向本刊投稿。

简介：ThemethodofproducingacompleteMRIimageisbasedontheanalysisoffreeinductiondecay.ItmainlystudieswhenandhowmagneticvectorrevestsitsinitialstateafterRFpulse,butneglectstheeffectoftheRFform.Inthispaperwemainlystudythis.WegivethemathematicexpressionofRFpulsewhichcantheoreticallyimproveimage（?）ality.InMRI,B1（t）isthealternateelectromagneticexcitationfield,itcanbeexpressedasfollows:

简介：

简介：

简介：

简介：Introductionα-Aminonitrile(oraminoacetonitrile)isakindofreactivebioorganicmolecules,anditmayexistininsterstellarclouds.itsimportanceliesinthata-aminonitrilemayplayaroleinthegenerationoflargecarbon-nitrogenchainmolecules.Bymeansofflashvacuumthermolysisandgas-solidreaction(FVT-GSR)tech-nique,Guillemin,etal.,studiedthethermolysisofa-aminonitrile,theyconsideredthattheeliminationofHCN(shownasfollowing)isakeystepinmanyreactionsofα-

简介：SincePresidentHuJintaoformallyputforwardtheideaof'buildingaharmoniousworld'forthefirsttimeatthesummitmeetingcommemoratingthe60thanniversaryofthefoundingtheUnitedNationsinSeptember2005,therehasbeenloudresonanceathomeandabroad.TheForeignAffairsWorkConferenceoftheCentralCommitteeoftheCommunistParty

简介：

简介：

简介：Densityfunctionaltheory(DFT)calculationswerecarriedoutonthecompoundsCp2Ln-guanforLn=Y,Lu,Yb,DyandGd,[guan=(iPrN)2CN(iPr)2].TheresultswerecomparedwiththeX-raystructuresthatwereavailablefromtheliterature;thecalculationsreproducedquitewelltheexperimentalstructuralfeaturesinthesecomplexesexhibitingdistortedtetrahedrongeometry.ThecalculatedevolutionoftheLn-guanbondasafunctionofthecationshowedthatlanthanide-liganddistancesincreasedwiththeincrea...

简介：Apreviouslydevelopedmodelofa2-dimensionalairflowwithconstanthorizontalshearisusedtoestimeatetheaccuracyofthegeostrophicmomentumapproximationbycomparisonofexactsolutionswhenexistwithapproximateones.

简介：

简介：ThefollowingareexcerptsofaspeechmadebyJinJian,PresidentoftheChinaPenologySocietyandVice-PresidentoftheChinaSocietyforHumanRightsStudiesataseminaronprisoners’humanrightsorganizedbytheChinaPenologySocietyandtheChinaSocietyforHumanRightsStudies.

简介：TheValueoftheWorld'sEcosystemServicesandNaturalCapitalbyCostanzain1997isgenerallyre-gardedasamonumentfortheresearchofvaluingecosystemservices.However,theclassificationofecosystemser-vices,themethodofvariousservicessummationandthepurposeforstaticglobalvaluehadbeconfrontedbymanycriticisms.Basedonthesummaryofthesecriticisms,suggestions,relatedfunctionassessmentandfurtherstudydirection,thesustainabilityofecosystemservicesispresented.Thetwobasicindicatorsinecology,productivityandbiodiversity,respectivelycharacteringtheabilityofproducingandself-organizing,notonlyrepresenttheinternalfunctionofecosystem,butalsoareproportionedtoitsexternalfunctionofsupportingandprovidingforhumanlife.Onpresentingthegeneralformofecosystemservicesassessment,thispaperimprovesthemathematicalformulabygivingafunctionadjustingcoefficientcomposedofproductivityandbiodiversity.Theoretically,theintegrationofthetwoindicatorsreflectsthechangesofecosystemservicesatspatialandtemporalscales,canphysicallyassessthesustainabilityofecosystemservices,andbuildafirmscientificfundamentofvalueassessmentforecosystemservices.Objectively,itsapplicationshouldbestrictlytestedinnextstep.

简介：Baiyuneboite-(Ce)isanewfluor-carbonatemineral.Basedonthefinedataonthestructureofthemineral,thefactorgroupandnormalcoordinateanalysesforitsinfraredspectrumhavebeencarriedout.ThefactorgroupanalysesindicatethatthesitegroupandfactorgroupsplittingsoftheinternalvibrationbandsofCO3^2-ionsdonotoccurandthatthedoublebandsofnormalmodesresultfromtwonon-equalsetsofCO3^2-ionsinthecrystalstructure,Thenormalcoordinateanalysesgivethestretchingforceconstants.bendforceconstantsandcalculatedfrequenciesofCO3^2-ions.Thecalculationsofpotentialenergydistributionallowustoassignv3andv4tothestretchingvibrationandthebendvibrationofCO3^2-ions.respectively.

简介：ThecommissioningofseverallargeinstallationsofAPEmillecomputersinEuropewillhavebeenfinishedinautumn2001,Allthesemachinestogethermakeanother2Tflopsofcomputingpoweravailablefornumericalsimulationsintheoreticalparticlephysics.