简介:Throughphysicalmodelingandnumericalsimulation,theflowfieldinaslabcontinuouscastingmoldwithelectromagneticstirringismeasuredunderdifferentcastingparametersandstirringcurrents.Toqualitativelyevaluatetheflowfieldinthemold,twoindexes,i.e.,moldfluxentrapmentandvelocityuniformity,areproposed.Basedonthesetwoindexes,someoptimizedstirringparametersunderdifferentcastingconditionscanbedetermined.
简介:Thisstudyestablishedathree-dimensionalmathematicalmodeltodeterminethefluidflowinaslabcontinuouscastingmoldunderanelectromagneticstirringforce.Theflowstructureanddistributionwerestudiedwithrespecttodifferentcontinuouscastingparametersandstirringcurrent.Basedonthecalculationresults,themoldfluxentrapmentindexinfreesurfaceandvelocityuniformityindexwereusedtoevaluatetheflowfieldinthemold.Thetheoreticalbasisfortheoptimizationoftheflowfieldstructurewasprovided.Thestudyalsosuggestedanoptimizationmethodforelectromagneticstirringparameters.
简介:Aphysicalmodelwithmercuryasanalogwasdevelopedtoinvestigatetheinfluencesofelectromagneticstirring(EMS)onflowfieldinslabcontinuouscastingwhenthesubmergedentrynozzle(SEN)wascloggedwithdifferentcloggingrates(0,10%,25%,and50%).TheflowfieldinmoldunderdifferentEMScurrents(0,40A,and60A)wasmeasuredbyanultrasonicDopplervelocimeter.Theresultsprovedthattheflowfieldinthemoldwasatypicaldoublerollstructureundernon-cloggingSEN.AstheSENcloggingrateincreased,theflowfieldstructurewastransformedfromadoublerolltoasymmetryflow.Whenthecloggingratereached50%,theupcirculationdisappearedonthecloggedside.Thezoneunderthemeniscusnearthenarrowfacewasanon-flowingarea.EMScouldcorrectbiasflowcausedbySENcloggingandimprovethesymmetryoftheflowfieldduringSENclogging.
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简介:摘要目的分析讨论Th1/Th2细胞因子平衡治疗自身免疫性疾病的临床效果。方法选取2014年3月至2015年3月我院符合入选标准的自身免疫疾病患者100例作为研究对象,将其随机分为试验组和对照组。试验组采取各自对应的Th1/Th2细胞因子平衡疗法治疗,对照组则采用各自相对应的传统方法治疗,比较各组患者治疗疗效。结果1、对于重症类风湿关节炎、系统性红斑狼疮患者,试验组患者临床疗效更好,P<0.05,具有统计学意义;2、对于轻度类风湿关节炎、系统性红斑狼疮以及硬皮病患者,试验组与对照组之间疗效相当,P>0.05,无有统计学意义。结论Th1/Th2细胞因子平衡疗法对于重症自身免疫疾病治疗效果明显,对轻度则与传统方法相比无明显优势。
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简介:Weexperimentallydemonstratea16×16reconfigurablynonblockingopticalswitchfabricusingaBenesarchitecture.Theswitchfabricconsistsof562×2Mach–Zehnderinterferometerbasedelementaryswitches,witheachintegratedwithapairofwaveguidemicroheaters.Theaverageon-chipinsertionlossis~5.2dBforbothofthe'all-cross'andthe'all-bar'states,withalossvariationof1dBoverallroutingpaths.Thecrosstalkforallswitchingstatesisbetterthan-30dB.Theswitchingtimeoftheswitchelementisabout22μs.Theswitchingfunctionalityisverifiedbytransmissionofa40Gb∕squadraturephase-shiftkeyingopticalsignal.
简介:前不久,中国航天科技集团公司第六研究院第十一研究所发来感谢信,对中国科学院兰州化学物理研究所为2016年6月25日长征七号运载火箭的成功发射所作出的贡献表示感谢。
简介:根据《关于印发〈电力需求侧管理办法〉的通知》(发改运行[2010]2643号)和《关于印发〈电网企业实施电力需求侧管理目标责任考核方案(试行)〉的通知》(发改运行[2011]2407号)要求,我委会同有关部门对国家电网公司、南方电网公司2015年度电力需求侧管理目标责任完成情况进行了评价考核,现将考核结果公告如下:2015年,国家电网公司、南方电网公司等以深化电力体制改革为契机,继续推进电力需求侧管理,引导用户节约电力电量,创新平台应用,探索需求响应,大力实施电能替代,有力保障电力供需平衡和促进资源优化配置。根据各地对省级电网企业的考核结果,以及交叉检查、专家组抽查的情况,2015年国家电网公司、
简介:Foundedin1956,ChinaInstituteofInternationalStudies(CIIS)istheonlythinktankoftheMinistryofForeignAffairsofthePeople'sRepublicofChina.ItisalsorecognizedasthefirstandleadingresearchinstituteoninternationalissuesinChina.ResearchattheInstituteisfocusedprimarilyonforeignpolicyissuesofstrategicimportance,particularlythoseconcerninginternationalpolitics,securityandworldeconomy.TheInstitutealsoshoulderstasksinTrackⅡdiplomacyandconductspublicdiplomaticwork.The