简介:QuantumdynamicscalculationsforthetitlereactionH(2S)+S2(X3-Σg)→SH(X2Π)+S(3P)areperformedbyusingagloballyaccuratedoublemany-bodyexpansionpotentialenergysurface[J.Phys.Chem.A1155274(2011)].TheChebyshevrealwavepacketpropagationmethodisemployedtoobtainthedynamicalinformation,suchasreactionprobability,initialstate-specifiedintegralcrosssection,andthermalrateconstant.Itisfoundnotonlythatthereisareactionthresholdnear0.7eVinbothreactionprobabilitiesandintegralcrosssectioncurves,butalsothatboththeprobabilityandcrosssectionincreasefirstlyandthendecreaseasthecollisionenergyincreases.Theexistenceoftheresonancestructureinboththeprobabilityandcrosssectioncurvesisascribedtothedeeppotentialwell.Thecalculationoftherateconstantrevealsthatthereactionoccurringonthepotentialenergysurfaceoftheground-stateHS2isslowtotakeplace.
简介:Theaddedmasscoefficientandthewaterlevelindexformulasforthesame-phaseandanti-phasevibrationofrectangularliquidtanks'bulkheadswerederivedbasedondrymodetheory.Threefluid-structureinteractionnumericalmethodsincludingFluidFEMandFluidBEMwereusedinthiscase.ThecomparisonofnumericalandtheoreticalresultsbythepresentmethodshowsthatANSYS/FluidS0ismorecredible,theNASTRAN/VirtualMassMethodismoresuitableforengineeringcalculationsandresultsofthesame-phasevibrationbythepresentmethodismoreaccurate.
简介:OnDecember27,2013thelastoneofprocessunits–theisomerizationunitinthe600kt/apara-xyleneprojectwasputonstreamattheHainanRefiningandChemicalCompanyatthefirstattempttodelivermassiveparaxylene
简介:ThesubstantialchangeintheinternationalsystemsincetheendoftheWorldWarIIhasbeenaboontonon-Westernnations,whichmakeupthree-quartersofallthecountriestoday.Mostnationalities,populationsandcountriesthathadlittlefreedomandalmostnovoicehaverepresentationtodayintheUnitedNationsandG20,andtheybenefitfrom
简介:U.S.sanctionsonIranhaveexpandedsincethestartoftheIraniannuclearissue.Theyhavegrownfromsmall-scaleembargoestotoday’ssanctionsonmultiplesectorsincludingfinance,trade,energy,andpersonnel.DuringU.S.PresidentBarackObama’stenure,thereisverylittlelikelihoodthattheU.S.willresorttoforce,leavingWashingtonwithnoothermeansthansanctionstopersuadeIrantochangeitsnuclearpolicy.Thismeansthatalthoughsanctionshavealimitedeffect,theU.S.willcontinuetoprimarilyrelyonthemtoforceIran’shand.
简介:AlthoughChina’scoreinterestsintheMiddleEastareeconomic,theseareinterwovenwithitsotherinterestsincludingthoseintheareasofpolitics,strategy,securityandoverseasinterests.Becauseofthesignificantgapbetweenitsinterestsanditsinfluence,ChinashouldadoptanewstrategyintheMiddleEast,onethatisdifferentfromthosethatotherpowershaveemployedintheregion.
简介:Itislearnedfromthe2013SummitForumonStrategicDevelopmentofCoal-to-NaturalGasinChinathattheChinaSedinEngineeringCompany,Ltd.hasdevelopedwithindependentintellectualpropertyrightstwoexperimentalfurnacesforpressurizedgasificationofcrushedcoal,5min