简介:TheS-RHTtechnologyisdevelopedbyFRIPPforresiduehydrotreatinginthefixedbedinordertoprocessthehighsulfurcrudeandincreasetheyieldoflightdistillates.Thetechnologycanbeusedfortreatingvariouskindsofatmosphericresidues(AR)orvacuumresidues(VR)withatotalmetalcontentlessthan150ppmundertheoperatingconditionsofatemperaturerangingfrom360-410℃,ahydrogenpartialpressureof14-15MPa,aLHSVof0.20-0.30h-1andahydrogentooilratioof700-1000.AcertainamountoflightproductscanbeobtainedandthehydrotreatedatmosphericresiduecanfullymeettheneedsforthefeedstocktoRFCCorablendingfeedstocktoFCC.BasedontheS-RHTtechnology,a2Mt/aresiduehydrotreatingunithasbeenconstructedandsuccessfullystartedupatMaomingPetrochemicalCompanybytheendof1999.
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简介:采用哈巴河县观测站1961—2008年逐月平均气温、平均最高、平均最低气温资料.利用一元回归和R/S方法,分析了哈巴河县四季和年平均气温、年平均最高气温、年平均最低气温的变化特征。结果表明:近48年以来,哈巴河县冬、夏、秋季平均气温及全年平均气温序列均表现为升温的趋势,其中冬季升温最为明显:四季和年平均最高和最低气温近48年来也呈上升趋势.并且四季和年平均最低气温的上升趋势比四季和年平均最高气温的上升趋势显著。经R/S分析表明,未来四季中夏、秋、冬季及年平均气温仍呈上升趋势且持续时间较长,而春季气温上升趋势不明显;四季和年平均最高、最低气温未来上升的趋势也将继续存在,且最低气温的持续性比最高气温的持续性长,夏、秋两季最低气温升温趋势相对其他两季较为明显,而夏、冬两季的最高气温的升温趋势相对其他两季较为明显。总之.近48年来哈巴河县气温总体变化趋势存在明显的hurst现象.未来这种现象也仍将持续。
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:BackgroundRightbundlebranchblock(RBBB)maypresentasslurredornotchedSwaveinleadV1.However,slurredornotchedSwavemayalsorepresentslowconductioninthemyocardium.MethodsWeretrospectivelyanalyzedtheQRSpatternsinleadsV3RtoV5Rin7patientswithaslurredornotchedSwaveinleadV1.ResultsIntheleadsV3RtoV5R,6patientsshowedincompleteorcompleteRBBBand1patientslurredornotchedSwave.ConclusionsInthemajorityofECGsinasmallpatientserieswithslurredornotchedSwaveinleadV1,QRSmorphologyindicatingincompleteorcompleteRBBBwaspresentinleadsV3RtoV5R.AfindingoffragmentedQRSintheseleadsmayindicateslowconductioninthemyocardium.
简介:在设定不同H真实值的情况下,通过DHM算法模拟出一系列FGN序列,对经典R/S分析方法估计H指数的有效性进行研究,并对中国股市收益序列的H指数进行测定。研究结果表明:当H真实值介于0-0.6和0.8-1之间时,分别高估和低估H指数;仅当H真实值介于0.6-0.8之间时,经典R/S分析方法才能做出稍好的估计,其估计有效性尽管不受回归方式、局部趋势性剔除处理的影响,但是受到标度长度的选取、短期相关性处理、序列长度、序列包含的白噪声成分强弱等各种因素的显著影响,中国股市收益序列的H指数可能介于0.6-0.8之间,从而具有明显的长记忆性。