简介:TheS-RHTtechnologyisdevelopedbyFRIPPforresiduehydrotreatinginthefixedbedinordertoprocessthehighsulfurcrudeandincreasetheyieldoflightdistillates.Thetechnologycanbeusedfortreatingvariouskindsofatmosphericresidues(AR)orvacuumresidues(VR)withatotalmetalcontentlessthan150ppmundertheoperatingconditionsofatemperaturerangingfrom360-410℃,ahydrogenpartialpressureof14-15MPa,aLHSVof0.20-0.30h-1andahydrogentooilratioof700-1000.AcertainamountoflightproductscanbeobtainedandthehydrotreatedatmosphericresiduecanfullymeettheneedsforthefeedstocktoRFCCorablendingfeedstocktoFCC.BasedontheS-RHTtechnology,a2Mt/aresiduehydrotreatingunithasbeenconstructedandsuccessfullystartedupatMaomingPetrochemicalCompanybytheendof1999.
简介:ResearchonnonlinearR/SmethodanditspplicationinearthquakepredictionBi-QuanWANG(王碧泉);Han-MingHUANG(黄汉明);Hong-ShunFAN(范洪顺);Chuen...
简介:TheproblemofpicksequencingintherotaryrackS/Rsystem(PPS-RRS)isinvestigatedwiththeobjectiveofminimizingtheexecutiontime.TherotaryrackS/RsystemconsistsofoneS/Rmachineandmultiplelevelsofcarouselsthatcanrotateindependentlyinbi-directions.Theroutingpolicy,namelythedecisiononthestorageorretrievalsequence,dominatestheefficiencyandthethroughputforsuchS/Rsystems,duetothecomplicatedrelationshipbetweenalllevelsofcarouselsandtheS/Rmachine.ForthepurposeofoptimizingthePPS-RRS,acomputationalmodelisdevelopedintermsofexecutiontimeforpickingmultipleitemsinonetrip.CharacteristicsofthePPS-RRSareanalyzedandalocalsearchheuristicbasedonanewlyproposedneighborhoodispresented.Integratedwiththeproposedlocalsearchprocedureanewhybridgeneticalgorithmisdeveloped.Experimentalresultsdemonstratethestructurecharacteristicsofgoodsequenceandtheefficiencyandeffectivenessoftheproposedsequencingalgorithms.
简介:文章对S11-M·R系列变压器在降低空载损耗和减小空载电流方面进行了论述和比较。得出了采用S11-M·R系列变压器,在降低功率损失、减小空载电流、使用寿命和投资回收等方面的突出优势,是较为理想的选择。
简介:Bothenantiomersoffluoxetineweresynthesizedinfivestepsfromethylbenzoylacetate(1)usingmicrobial-chemicalapproachwithoverallyieldsof59%and62%respectively.(S)-Enan-tiomercanbeobtainedin>99%e.e.byrestingcellofbaker’syeastandtheRformwasproducedin81%e.e.byimmobilizedGeotrichumsp.G38.
简介:Bothenantiomersofdenopamineweresynthesizedusingmicrobial-chemicalapproachviabioreductionof1-(acetoxyphenyl)ketone4(R=CH2C1)and5(R=CO2Et)withfungusGeotrichumsp.G38.
简介:UsingthemethodofGirsanovtransformation,weestablishtheTalagrand'sT2-inequalityfordiffusiononthepathspaceC([0,N],R^d)withrespecttoauniformmetric,withtheconstantindependentofN.ThisimprovestheknownresultsfortheL2-metric.