简介：Theresultsof118REEanalysesofLi-FgranitesfromSouthChinaandothercountriesindicatethattherearethreevariationtypesofREEpatterncurveswithdifferentevolutiontrendsfromearlytolatestagesofLi-FgranitecomplexoffromlowertoupperpetrofaciesoftheLi-Fgranitebody;(1)thedecreasing,(2)theincreasing,and(3)thesaltatoryvariationtypes.Thefirstvariationtypeiscalledthepositiveevolutiontype,attributedtocrystallizationdifferentiation.Thesecondiscalledthereversionevolutiontype.whichrepresentsliquidsegreationdominatedbyvapor-liquiddistillation.Thethirdiscalledthesaltatoryvariationtype,whichisformedfromliquidsegregationdominatedbyimmiscibilty,Therefore,theindicaticesofliquidsegregationdominatedbyimmiscibilityarethesaltatoryvariationtypeofREEpatternevolutionandtheseparationofthemainevolutiontrendlineseitherfromthesub-evolutiontrendlinesorfromthecompositionpointsofLi-FgranitesinthediagramsofREE-(La-Yb)NandLa/Sm-La,Theindicatricesofliquidsegregationdominatedbyvapor-liquidfractionaldistillationarethereverstionevolutiontypeofREEpatterncurvesandthemainevolutiontrendlinesofLi-Fgranitesdirectingtotheupperright-handontheREE-La/Yb)NandLa/Sm-Ladiagrams.

简介：Theinfluencingfactorsforliquidphasecatalyticoxidationofminegastomethanol(informofCH3COOCH3)arestudiedusingtheself-establishedexperimentalapparatus.TheresultsshowthatCH3COOCH3(targetproduct)isobtainedbyusingCH3COOHasreactionsolvent,andtheyieldoftargetproductincreaseswiththeincreasingofreactiontemperature,gaspressureandreactiontime.Intheminegas-Pd(OAc)2-CH3COOHsystem,theyieldofCH3COOCH3increaseswiththeincreasingofadditionofPd(OAc)2whichisredoxcatalystforminegasconversion.TheyieldofCH3COOCH3willbegreatlyimprovedbycompositeadditionaloxidantwhichisobtainedbyequimolarmixofp-benzoquinonewithNO2.

简介：被动控制系统的各种各样的类型被用来在最近的年里压制结构的地震反应。在这些系统之中，调节了液体列Dampers(TLCD)由在容器联合液体团的运动的效果浪费输入地震体力，液体上的恢复力量由于严肃负担并且通过孔由于液体运动抑制。在这研究，象频率内容和土壤那样的地震刺激特征的效果用非线性的时间历史分析在TLCD的地震表演上调节reinvestigated。在这方面在伊朗的过去的地震地面运动记录之中，有不同参数的16个记录被选择。在开发的结构的模型，依附的TLCD作为一个调节的团被模仿更潮湿(TMD)有一样的颤动时期并且作为原来的TLCD抑制比率。数字结果证明地震刺激特征经常在排水量减小能力上有一个实质的角色液晶显示器和他们应该在TLCD的设计因此被考虑。

简介：Li-Fgranitesallovertheworldcanberepresentedbythreeendmembers,i.e.,theNa-richongonite(O),theK-richxianghualingite(X)andtheSi-richtopazite(T),Charactersandcriteriaarepresentedfortheseend-mnemberrocks,VerticalzoninginLi-Fgranites,asreflectedbyincreasingnormativeQandC(corundum)anddecreasingALK(K2O+Na2O)withincreasingcontentoffluorine,canbeexplainedusingthethree-end-memberschemeintermsofpetrochemistryandnorms.Consideringthedifferenceinmeltstructure,visocosityanddensitybetweentheendmembers,incouplewiththeregulartiesthatgoverntheNa-KandSiALKsegregationknownfromfieldevidenceandexperiments,itissuggestedthatthethreeendmembersmayhaveresultedfromliquidsegregation(immiscibility)ratherthanfromcrystalfractionationascommonlybelieved.

简介：在3月16-17,2008日，海雾在广东省的西方在Dianbai发生了并且被高压的摘要的system.Using伴随全面观察数据集，这研究在这海雾期间分析液体水内容的进化并且调查海雾显示出的在液体水内容和平均直径和主要结果表现为的exchanges.The跟随的雾微滴，空气温度，风速度和骚乱的计数密度(1)之间的关系伪每

简介：ThePulangporphyrycopperdeposit,locatedintheGezantectonic-magmaticarcandsouthoftheYidunislandarc,southwestofSanjiangmetallogenicbeltinYunnanprovince,isasuper-largeporphyrycopperdeposit.Duringrecentdecades,thePulangdeposithasattractedwideattentionamonggeologistsbothathomeandabroad.Manypreviousresearcheshavediscussedits更多还原

简介：Inthispaper,thetotalsugarconcentration,proteinconcentration,lipidyieldandmorphologycharacteristicsofthealgaeresidueweredeterminedtoexplainthemechanismoflipidsextractionfromwetmicroalgaeScenedesmussp.byionicliquidassistedsubcriticalwater.Theresultsshowedsimilarvariationforthesugar,proteinandlipid.However,thetotalsugarwasmoresimilartolipidsyield,sotheresultsshowedthatthereactionbetweenionicliquidandcelluloseandhemicelluloseincellwallwasthemostimportantstepwhichdeterminedthelipidsextrationdirectly.Andthetotalsugarvariationmayberepresentingthelipidsyield.Forlaterlipidsextraction,wecandeterminethetotalsugarconcentrationtopredicttheextractionendproduct.

简介：Liquidseparationofmagmaisreferredtoakindofdiffcrentiationofmagmawhichtakesplaceinthecaseofthatmeltsareimmiscibleorlimitedlymiscibleeacliother.Itplaysanimportantroleintheform-ingofbasic,ultrabasicrocksandoredepositsrclatedtotho8ekindsofrocks.Butitisnotsurewhethcritmayoccurintheprocessoftheformingofin

简介：Thedesignprincipleandstructuralfeaturesofanewtypedual-channelground-basedmicrowaveradiometerformeasurementofwatervaporandliquidwaterintropospherearediscussed.Amethodindependentofradiosondedataisusedforsystemabsolutecalibrations.Astatisticalmethodforretrievingthetotalwatervaporandcloudliquidwatercontentandanonlineariterativealgorithmforretrievingthewatervaporprofilesinthetropospherearediscussed.Comparisonisconductedbetweenthemeasurementoftheintegratedamountsofthewatervaporandthetroposphericvaporprofilesbytheradiometerandtheradiosondedata.

简介：Themainintentionofthepresentstudyistoreducewind,wave,andseismicinducedvibrationsofjackettypeoffshorewindturbines(JOWTs)throughanewlydevelopedvibrationabsorber,calledtunedliquidcolumngasdamper(TLCGD).UsingaSimulink-basedmodel,ananalyticalmodelisdevelopedtosimulateglobalbehaviorofJOWTsunderdifferentdynamicexcitations.ThestudyisfollowedbyaparametricstudytoexploreefficiencyoftheTLCGDintermsofnacelleaccelerationreductionunderwind,wave,andearthquakeloads.StudyresultsindicatethatoptimumfrequencyoftheTLCGDisratherinsensitivetoexcitationtype.Inaddition,whilethegaininvibrationcontrolfromTLCGDswithhighermassratiosisgenerallymorepronounced,heavyTLCGDsaremoresensitivetotheirtunedfrequencysuchthatill-regulatedTLCGDwithhighmassratiocanleadtodestructiveresults.ItisrevealedthatawellregulatedTLCGDhasnoticeablecontributiontothedynamicresponseoftheJOWTunderanyexcitation.

简介：Thevibrationresponseofafree-hangingflexibleriserinducedbyinternalgas-liquidslugflowwasstudiedexperimentallyinasmall-diametertubemodelbasedonFroudenumbercriterion.Theflowregimeinacurvedrisermodelandtheresponsedisplacementsoftheriserweresimultaneouslyrecordedbyhighspeedcameras.Thegassuperficialvelocityrangesfrom0.1m/sto0.6m/swhiletheliquidsuperficialvelocityfrom0.06m/sto0.3m/s.Severesluggingtype3,unstableoscillationflowandrelativelystableslugflowwereobservedintheconsideredflowrates.Severesluggingtype3characterizedbyprematuregaspenetrationoccursatrelativelylowflowrates.Boththecycletimeandsluglengthbecomeshorterasthegasflowrateincreases.Thepressureattheriserbaseundergoesalongerperiodandlargeramplitudeoffluctuationascomparedwiththeothertwoflowregimes.Additionally,severesluggingleadstothemostvigorousin-planevibration.However,theresponsesintheverticalandhorizontaldirectionsarenotsynchronized.Theverticalvibrationisdominatedbythesecondmodewhilethehorizontalvibrationisdominatedbythefirstmode.Similartothevortex-inducedvibration,threebranchesareidentifiedasinitialbranch,build-upbranchanddescendingbranchfortheresponseversusthemixturevelocityofgas-liquidflow.

简介：<正>1IntroductionTheundergroundbrineresourcesdistributingwidelyinSichuanBasin,Chinahavedrawnworldwideattentionduetotheirunusualelementabundanceandexcellentquality.

简介：Molecularlyimprintedpolymers(MIPs)werepreparedbythebulkpolymerizationusingcrystalvioletasthetemplatemolecule,andthemethacrylicacidandethyleneglycoldimetheacrylateasfunctionalmonomerandcross-linker,respectively.Systematicinvestigationsofsyntheticconditionswereconducted.Thesurfacemorphologyandrecognitionmechanismoftheobtainedpolymerswerestudiedusingscanningelectronmicroscopeandspectrophotometricanalysis.MIPsshowedhighaffinitytotemplatemoleculeandweresuccessfullyappliedasspecialsolid-phaseextractionsorbentforselectiveextractionofcrystalvioletfromnaturalseawater.Anoff-linemolecularlyimprintedsolid-phaseextraction(MISPE)methodfollowedbyhigh-performanceliquidchromatographywithdiodearraydetectionfortheanalysisofcrystalvioletwasalsoestablished.MISPEcolumnshavegoodrecoveriesforcrystalvioletstandardsolutionsandgoodlinearitywasobtainedovertheconcentrationrangeof0-200μgL-1(R2>0.99).Finally,twonaturalseawatersampleswereinvestigated.TherecoveriesofspikedseawaterontheMISPEcolumnswerefrom44.47%to62.34%,therelativestandarddeviation(n=3)beingintherangeof2.89%-5.96%.

简介：Theproceduresofultrasonicextractionandclean-upwereoptimizedforthedeterminationofpolycyclicaromatichydrocarbons(PAHs)inmarinesediments.Sampleswereultrasonicallyextracted,andtheextractswerepurifiedwithaminiaturizedsilicagelchromatographiccolumnandanalyzedwithhighperformanceliquidchromatography(HPLC)withafluorescencedetector.Ultrasonicationwithmethanol-dichloromethane(2:1,v/v)mixturegavehigherextractionefficiencythanthatwithdichloromethane.Amongthethreeelutionsolventsusedinclean-upstep,dichloromethane-hexane(2:3,v/v)mixturewasthemostsatisfactory.Undertheoptimizedconditions,therecoveriesintherangeof54.82%to94.70%withRSDsof3.02%to23.22%foraspikedblank,andintherangeof61.20%to127.08%withRSDsof7.61%to26.93%foraspikedmatrix,wereobtainedforthe15PAHsstudied,whiletherecoveriesforaNISTstandardreferenceSRM1941bwereintherangeof50.79%to83.78%withRSDsof5.24%to21.38%.Thedetectionlimitswerebetween0.75ngL-1and10.99ngL-1fordifferentPAHs.AsamplefromtheJiaozhouBayareawasexaminedtotesttheestablishedmethods.