简介:IntheexistingliteratureofRepairableQueueingSystems(RQS),i.e.,queueingsystemswithserverbreakdowns,itisalmostallassumedthatinterarrivaltimesofsuccessivecustomersareindependent,identicallyexponentiallydistributed.Inthispaper,wedealwithmoregenericsystemGI/PH/1withserver'sexponentialuptimeandphase-typerepairtime.Withmatrixanalysistheory,weestablishtheequilibriumconditionandthecharacteristicsofthesystem,derivethetransientandstationaryavailabilitybehaviorofthesystem.
简介:Thispaperanalyzesafinite-bufferrenewalinputsingleserverdiscrete-timequeueingsystemwithmultipleworkingvacations.Theserverworksatadifferentrateratherthancompletelystoppingworkingduringthemultipleworkingvacations.Theservicetimesduringaserviceperiod,servicetimeduringavacationperiodandvacationtimesaregeometricallydistributed.ThequeueisanalyzedusingthesupplementaryvariableandtheimbeddedMarkov-chaintechniques.Weobtainsteady-statesystemlengthdistributionsatpre-arrival,arbitraryandoutsideobserver'sobservationepochs.Theanalysisofactualwaiting-timedistributionandsomeperformancemeasuresarecarriedout.Wepresentsomenumericalresultsanddiscussspecialcasesofthemodel.
简介:摘要院以品牌化带动农产品市场化是现代农业发展的必由之路。从GI的内涵出发,结合消费者对农产品需求产生的新特点,分析了GI农产品品牌营销的必要性,并结合天津市GI农产品品牌覆盖情况,分析了特色农产品品牌营销面临的机遇与挑战,并在此基础上,提出促进天津市特色农产品品牌营销的措施。
简介:Humanμ-opioidreceptor(HμOR)withatagofsixconsecutivehistidinesatitscarboxylterminushasbeenexpressedinrecombinantbaculovirusinfectedSf9insectcells.Themaximalbindingcapacityforthe[^3H]diprenorphineand[^3H]ohmefentanyl(Ohm)were9.1±0.7and6.52±0.23nmol/gprotein,respectively.The[^3H]diprenorphineor[^3H]OhmbindingtothereceptorexpressedinSf9cellswasstronglyinhibitedbyμ-selectiveagonists[D-Ala^2,N-methyl-Phe^4,glyol^5]enkephalin(DAGO),Ohm,andmorphine,butneitherbyδnorbyκselectiveagonist.Na^+(100mM)andGTP(50μM)couldreduceHμORagonistsetorphineandOhmaffinitybindingtotheoverexpressedHμOR.μ-selectiveagonistsDAGOandOhmeffectivelystimulated[^35S]GTPγSbinding(EC50=2.7nMand6.9nM)andinhibitedforskolin-stimulatedcAMPaccumulation(IC50=0.9nMand0.3nM).Theagonist-dependenteffectscouldbeblockedbyopioidantagonistnaloxoneorbypretreatmentofcellswithpertussistoxin(PTX).TheseresultsdemonstratedthatHμORoverexpressedinSf9insectcellsfunctionallycoupledtoendogenousCi/oproteins.
简介:ntroductionThemeaningoftheexpressiongisbi2-(in)-DU3,intheroyalinscriptionofUtu-hegalrecordinghisvictoriouscampaignagainstGutium,isstillnuclear.F.Thureau-Dangin(1912)readtheexpressiongis-ne-GAGwiththetranslation"tosacrifice"followedbyseveralotherscholars(Kramer1963,325f.;IRSA,130-2).W.H.Ph.Romerhashowever,inhistreatmentoftheinscription,mostconvincinglyarguedfortherejectionofthistranslation.2Inadditiontohisarguments,wemayperhapsaddthatthedifferentcontextsinwhichgisbi2-DU3ismentioneddonotseemtobeofareligiousch...
简介:【目的】观察低血糖生成指数膳食对代谢综合征患者血糖、血脂的影响。【方法】选取住院代谢综合征患者180例,随机分为对照组和干预1组、干预2组,每组患者60例。对照组采用普通糖尿病膳食,干预组采取LGI膳食干预1组采用60g/d青稞、干预2组采用120g/a青稞干预30d,观察患者的体质量、血糖、血脂的变化。【结果】LGI膳食干预后,干预组体质量、空腹血糖、餐后2h血糖、甘油三酯、总胆固醇、低密度脂胆固醇均显著低于对照组(P〈0.05),高密度脂蛋白胆固醇显著高于对照组。【结论】采取含青稞LGI膳食可有效地控制代谢综合征患者的体质量、血糖、血脂水平,降低胰岛素抵抗。