简介:Inthiswork,wesimulatenumericallythethermaleffectsinnitrogenatatmosphericpressurecausedbyanegativecoronaDCdischargeoflowcurrent.Amathematicalfunctionthatsimulatestheinjectionofthethermaltransferingasisproposed.Thesimulateddischargeisofanegativepointtoplanemasstype,withaninterelectrodedistanceof12mmandasymmetryabouttheaxisofdischarge.Thespatialandtemporalevolutionofneutralsisanalyzedbasedupontheequationsofcontinuity,momentumandenergyinacylindricalgeometry.Forthegeometryofthesystem,theFCT(fluxcorrectedtransport)procedurewasadopted.
简介:以EM223-16/16-DC.RLY模块元件级的维修实例,阐述了此模块的工作机制,并且通过抄板,将完整的电路图绘制下来,以便各位同行相互学习和交流。
简介:CymbopogoncitratusisawidelydistributedperennialherbbelongingtothePoaceaefamilyandhasbeenextensivelyconsumedforitsmedicinal,cosmetic,andnutritionaleffectsforcenturies.Alargenumberofreportshavebeenpublisheddescribingthepharmacological,biological,andtherapeuticactionsofthisherb.Inthisreview,wesummarizedtheliteraturesonrelatedstudies(uptoJanuary,2014)thathighlightedthepharmacologicandbiologicaleffectsofthemajorphytochemicalsisolatedfromC.citratusextractsanditsessentialoil.ThecomponentsoftheessentialoilsfoundinC.citratushaveasimilarpharmacokineticproperties,includingabsorption,distribution,metabolism,andexcretion.Theyarequicklyabsorbedfollowingoral,pulmonary,anddermaladministration.Basedonthepublishedreports,itcanalsobeinferredthat,afterabsorptionfromthesmallintestine,somephytochemicalsinC.citratuscanundergooxidation,glucuronidation,sulfation,and/orO-methylation.Excretionisthroughurine,fecesand/orexpiredvolatiles.ThebiotransformationreactionsofC.citratusbioactiveconstituentsareessentialforitsrelativelysafeconsumptionandtherapeuticapplications.ThedataavailablesofarwarrantfurtherstudiesevaluatingC.citratuspharmacokinetics.ReliablepharmacokineticdatainhumanswouldbecriticalforabetterunderstandingofthethesystemichandlingofC.citratus.
简介:Dependenceofthecurrent-voltagecharacteristicsofanon-transferredDCcascadedplasmatorchusedfornanoparticlesynthesis,ontheplasmacurrentandtheplasmaargongasflowratearereportedinthispaper.Thepotentialstructureinsidethetorchanditsdependenceontheplasmacurrentandgasflowratearealsoinvestigated.Thearcvoltageisseentoexhibitnegativecharacteristicforacurrentbelow150Aandpositivecharacteristicabovethatcurrentvalue.Thevoltagedropneartheelectrodesisfoundtodecreasewiththeincreaseinplasmacurrent.25%ofthetotalvoltageisdroppednearthecathodeataplasmacurrentof50Aandaargonplasmagasflowrateof10literperminute(LPM),anditdecreasesto12%withthecurrentincreasingto300A,andto17%withagasflowrateof25LPM.Thevariationinthetorchefficiencywiththegasflowrateandplasmacurrentisalsoreported.Theefficiencyofthetorchisfoundtobebetween36%and48%.Inaddition,theplasmagastemperatureatvariouspositionsofthereactorandfordifferentcurrentsandvoltagesaremeasuredbycalorimetricestimationwithaheatbalancetechnique.
简介:摘要目的研究多囊肾的综合治疗方法。方法收集40例多囊肾患者,观察多囊肾的发病规律、治疗方法及治疗效果。结果40例中,临床治愈4例,显效6例,好转26例,无效4例(1例透析治疗)。结论采用综合治疗多囊肾可明显改善患者症状,降低肌酐,延缓肾脏病进展,对延长生存期起到积极作用。
简介:改革开放40年来,我国基础教育风雨兼程,取得了巨大的成效,主要体现为以下几个方面。一是实施九年义务教育:制定《中华人民共和国义务教育法》,使我国的义务教育走上了有法可依的道路;采取多种有效措施,提高适龄儿童的入学率;改造危房、兴建校舍、集资办学;发展特殊教育;全面实现“两基”目标。二是建设一支高素质的教师队伍:制定《中华人民共和国教师法》,以立法手段加强教师队伍建设;着力解决教师队伍数量不足、质量不高、教师队伍不稳定、民办教师等问题。三是解决义务教育经费不足问题:从政府教育投入严重不足,多渠道筹措教育经费,到争取教育经费占国内生产总值4%的持久“战斗”,走向免费义务教育,经历了曲折的过程。四是实施素质教育:素质教育的产生是时代发展的需要,是中国教育自身改革的需要,是中国社会和谐向善、移风易俗的需要;针对现在出现的“素质教育是伪科学”的论调,有必要为素质教育正解;新时代基础教育的任务是把素质教育进行到底。