简介:Thetheoreticalandexperimentalanalysesofwideningthedifferentialgroupdelay(DGD)dynamicrangeofdegreeofpolarization(DOP)-basedpolarizationmodedispersionmonitorusingaband-passfilterarepresented.TheexperimentshowsthatthemaximumDGDsametime,DOPsensitivityhasalittlechange.Theexperimentalresultsareinaccordancewiththenumericalones.
简介:Thelocalpressuredistributionsandresistancecoefficients(f1andf2)throughthesharp180degturninarelativelyshort(L/De=4)two-passsmoothandrib-roughenedchannelwereinvestigatedforaReynoldsnumberrangeof1.0×10^3,9.0×10^3.Theribpitch-to-herghtratios(p/e)were5,10,and20,Theribheight-to-hydraulicdiamterratios(e/De)were0.025,0.050and0.10,andtheribanglesofattack(a)were90,45,60,-45,and-60deg.Ridswereinstallednotonlyinbeforeandafterturnregionsbutalsointurnregion.TheresultsshowthatresistancecoefficientsremainapproximatelyconstantwhenReynoldsnumberismorethan3.0×10^4,Theeffectsoftheribconfiguration(ribspacing,ribheight,andriborientation)ontheinletstraightductresistancecoefficient(f2)weresignificant,however,theireffectsontheoverallresistancecoefficient(f1)weredilutedbythesharp-180turn.Forthisrelativelyshortchannel(L/De=4),theoverallresistancecoefficient(f1)wasgreatlyaffectedbythesharpturn.Correlationsfortheoverallresistance(f1)andinletstraightductresistancecoefficient(f2)arepresented.
简介:ThispaperdemonstratestheapplicationofadesigntoolcalledBioTRIZ.Itsdevelopersclaimthatitcanbeusedtoaccessbiologicalstrategiesforsolvingengineeringproblems.Ouraimistodesignaroofforhotclimatesthatgetsfreecoolingthroughradiantcouplingwiththesky.Theinsulationinastandardroofstopsthesunandconvectionfromwarmingthethermalmass.Butitalsorestrictsthemass’slongwaveviewofthecoolsky.DifferentsolutionstothisconflictareofferedbyBioTRIZ.Thechosensolutionistoreplacethestandardinsulationcomponentwithanopencellhoneycomb.Theverticalcellswouldallowlongwaveradiationtopass,whilearrestingconvection.ThesolutionsofferedbyBioTRIZ’stechnologicalcounterpartincludenosuchchangesinstructure.Itisestimatedthatthethermalmassinthebiomimeticroofwouldremainonaverage4.5?CcoolerthaninastandardroofoverayearinRiyadh,SaudiArabia.
简介:摘要目的探讨I-PASS医护联合交接模式在急诊危重患者入院交接中的应用效果。方法A组为2018年7月至2019年6月的142次危重患者入院交接,采用口头交接结合原交接记录单的形式;B组为2019年7月至2020年6月的169次危重患者入院交接,采用I-PASS医护联合交接模式。比较A、B两组的病情交接缺陷发生率、交班护士的评判性思维能力和接班护士对患者病情知晓情况。结果急诊危重患者入院交接缺陷发生率B组较A组低,交班护士的评判性思维能力测评得分、接班护士对患者病情知晓调查得分B组较A组提升,两组之间差异有统计学意义(均P<0.01)。结论在急诊危重患者入院交接中使用I-PASS医护联合交接模式可降低交接缺陷的发生,提升交接班护士工作能力,从而提高危重患者交接质量。
简介:Atunablenegativecoefficientband-passmicrowavephotonicfilter(MPF)withimprovedmainlobe-to-sidelobesup-pressionratio(MSSR)byaSagnacinterferometer(SI)isexperimentallydemonstrated.ThenegativecoefficientcharacteristicofMPFisachievedbyusingthephasemodulationtechnology.Thecentralfrequencyoftheband-passMPFistunablecontinuouslybychangingthewavelengthseparationofmulti-wavelengthopticalcarriers.A38-tapnegativecoefficientband-passMPFwhoseMSSRisincreasedbyabout6.371dBisachievedinexperimentbyapodizingthetapcoefficientwiththeSagnacinterferometer.
简介:基于piecewiselinearization的原则,微观结构进化模型的增长形式集成于thermo机械的联合有限元素(FE)在多传递期间模仿非线性的微观结构进化的模型热变丑。这是动态再结晶(DRX),元动态的再结晶(MDRX),静态的再结晶(SRX)和谷物生长(GG)发生在热变丑或变丑间隔期间的不稳定状态的变丑。为圆柱的AZ31的变丑和微观结构的分布取样在期间单个通行证并且热压缩是的双通行证计算的份量上并且与metallographic观察相比。变丑和微观结构由于在die和样品的扁平的结束之间的磨擦的存在是非一致地分布式的,这被显示出。在双通行证下面的平均谷物尺寸和它的标准差热压缩是比在单个通行证的压缩下面的那些稍微小的。模仿的平均谷物尺寸与实验同意发达FE模特儿根据微观结构进化的增长形式当模特儿,这是合理的很好,它验证。
简介:Anall-fiberopticallaserpulsemulti-passstretcherusingachirpedfiberBragggrating(CFBG)isdemonstrated.Pulsesfroma1053-nmmode-lockedfiberseedoscillatorarestretchedbymultiplepassingthroughachirpedfibergratingsetinafiberregenerativeamplifierstructure.Westretchthepulsefrom16psto1.855nsafterittransmitssevenloopsinthestretcher.Themainfactorsthataffectthestretchingresultsarediscussed.
简介:OntheafternoonofApril18,2016,agroupofSriLankafriendsvisitedCAFIU.TheywerethemembersofSriLanka-ChinaFriendshipAssociation(SLCFA)andthestudentwinnersofthe"21st-CenturyMaritimeSilkRoadSpeechContest".TheSpeechContestwasco-sponsoredbyCAFIUandSLCFA,attractingnearly600