简介：三维的弄弯的多重槽的波导的弯曲效率被使用有效索引、修改的转移矩阵方法的一个联合方法学习。不对称的结构，不对称的槽，和弯曲效率上的不对称的中间的脱衣的效果被调查。我们证明弯曲效率能被不对称的结构和不对称的中间的脱衣的使用改进。不同的槽波导的弯曲效率(直到五倍槽的结构)被比较。尽管单个槽的波导一般来说为一样的波导参数提供最低弯曲损失，多重槽的波导能比单个槽的介绍更低的弯曲损失，是可能的，这被揭示。

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简介：Asoneofthemostimportantdevelopmentsinaircoolingtechnologyforhotpartsoftheaero-engine,filmcoolingtechnologyhasbeenwidelyused.Filmcoolingholestructureexistsmainlyinareasthathavehightemperature,unevencoolingeffectivenessissueswheninactualuse.Thefirststageturbinevanesoftheaero-engineconsumethelargestportionofcoolingair,therebytheresearchonreducingtheamountofcoolingairhasthegreatestpotential.Anewsteppedslotfilmcoolingvanewithahighcoolingeffectivenessandahighcoolinguniformitywasresearchedinitially.Throughnumericalmethods,theaffectingfactorsofthecoolingeffectivenessofavanewiththesteppedslotfilmcoolingstructurewereresearched.Thispaperfocusesonthecoolingeffectivenessandthepressurelossindifferentblowingratioconditions,thenthemostreasonableandscientificstructureparametercanbeobtainedbyanalyzingtheresults.Theresultsshowthat1.0mmistheoptimumslotwidthand10.0isthemostreasonableblowingratio.Underthiscondition,thevaneachievedthebestcoolingresultandthehighestcoolingeffectiveness,andalsoretainedalowpressureloss.

简介：AnanalysisispresentedwithmagnetohydrodynamicsnaturalconvectiveflowofaviscousNewtonianfluidsaturatedporousmediuminaverticalslot.TheflowintheporousmediahasbeenmodeledusingtheBrinkmanmodel.Thefully-developedtwo-dimensionalflowfromcappedtoopenendsisconsideredforwhichacontinuumofsolutionsisobtained.Theinfluenceofpertinentparametersontheflowisdelineatedandappropriateconclusionsaredrawn.Theasymptoticbehaviourandthevolumefluxareanalyzedandincorporatedgraphicallyforthethree-parameterfamilyofsolution.

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简介：Theprobe-fedpatchantennaswereproposedbychangingtheparameterssuchasdielectricmaterialsanddimensionsofpatchfordetailinvestigationofchangesinoutputcharacteristics.Fourrectangularslotswereintroducedseparatelyforoptimizingtheantennadesignandcharacteristics.Thisstudyillustratedthechangesofoutputcharacteristicsofanantennawithrespecttothenumberofintroducedslotsontheradiatingpatchinadditiontotheeffectofvariousdielectricmaterialsonantennaperformances.Theantennaperformanceswereanalyzedbyplottingtheobservationofvariousdielectricmaterials.Thechangesofantennacharacteristicswerealsoobservedbyintroducingfournumbersofslotsoneachedgeofthepatchtoimproveradiationcharacteristicswithawiderimpedancebandwidth.

简介：Anovelslottedopticalmicrodiskresonator,whichsignificantlyenhanceslight–matterinteractionandprovidesapromisingapproachforincreasingthesensitivityofsensors,istheoreticallyandnumericallyinvestigated.Inthisslottedresonator,themodesplittingisgeneratedduetoreflectionoftheslot.Remarkably,effectsoftheslotwidthandangularpositiononthemodesplittingaremainlystudied.Theresultsrevealthatthemodesplittingisasecondfunctionoftheslotwidth,andthemaximummodesplittinginducedbytheslotdeformationisachievedwith2.7853×109Hz∕nm.Therefore,theslottedresonatorisanexcellentcandidateforpressureandforcesensing.Besides,theinfluenceoftheslotangularpositiononthemodesplittingisacosinecurvewiththehighestsensitivityof1.23×1011Hz∕deg;thus,theopticalcharacteristicdemonstratesthattheslottedresonatorcanbeusedforinertialmeasurements.

简介：Thispaperproposesanantennadesignconcepttoachieveamulti-reconfigurableband-notchantennabyusingasetofmicroswitches.Theproposedideawasprovedbythedesignofthecoplanarwaveguide(CPW)-fedslotantenna.Thesampledesigngivesawidebandantennatheimpedancebandwidthofwhichcoversthefrequencyrangedfrom1.9GHzto6.55GHz.Theantennacouldbeconfiguredtoworkeitherinsingle-bandmodeorinoneofthedefineddual-bandmodes.

简介：Inthispaper,wepresentanultra-compact1Dphotoniccrystal(PhC)Bragggratingdesignonathinfilmlithiumniobateslotwaveguide(SWG)via2D-and3D-FDTDsimulations.2D-FDTDsimulationsareemployedtotunethephotonicbandgap(PBG)size,PBGcenter,cavityresonancewavelength,andthewholesizeofPhC.3DFDTDsimulationsarecarriedouttomodeltherealstructurebyvaryingdifferentgeometricalparameterssuchasSWGheightandPhCsize.AmoderateresonancequalityfactorQofabout300isachievedwithaPhCsizeofonly0.5μm×0.7μm×6μm.TheproposedslotBragggratingstructureisthenexploitedasanelectricfield(E-field)sensor.Thesensitivityisanalyzedby3D-FDTDsimulationswithaminimumdetectableE-fieldassmallas23mV∕m.Thepossiblefabricationprocessoftheproposedstructureisalsodiscussed.ThecompactsizeoftheproposedslotBragggratingstructuremayhaveapplicationsinon-chipE-fieldsensing,opticalfiltering,etc.

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简介：ThisArticlepresentsathreedimensionalnumericalmodelinvestigatingthermalperformanceandhydrodynamicsfeaturesoftheconfinedslotjetimpingementusingslurryofNanoEncapsulatedPhaseChangeMaterial(NEPCM)asacoolant.Theslurryiscomposedofwaterasabasefluidandn-octadecaneNEPCMparticleswithmeandiameterof100nmsuspendedinit.AsinglephasefluidapproachisemployedtomodeltheNEPCMslurry.ThethermophysicalpropertiesoftheNEPCMslurryarecomputedusingmodernapproachesbeingproposedrecentlyandgoverningequationsaresolvedwithacommercialFiniteVolumebasedcode.TheeffectsofjetReynoldsnumbervaryingfrom100to600andparticlevolumefractionrangingfrom0%to28%areconsidered.ThecomputedresultsarevalidatedbycomparingNusseltnumbervaluesatstagnationpointwiththepreviouslypublishedresultswithwaterasworkingfluid.ItwasfoundthataddingNEPCMtothebasefluidresultswithconsiderableamountofheattransferenhancement.ThehighestvaluesofheattransfercoefficientsareobservedatH/W=4andC_m=0.28.However,duetothehigherviscosityofslurrycomparedwiththebasefluid,theslurrycanproducedrasticincreaseinpressuredropofthesystemthatincreaseswithNEPCMparticleloadingandjetReynoldsnumber.

简介：目的观察Slot双下肢全长负重位X线检查技术在全膝关节置换术前检查中的应用价值。方法对36例拟接受全膝关节置换术的患者术前行双下肢全长负重位X线检查。采用Slot技术,通过一次连续数秒曝光获得包含双髋关节至踝关节的双下肢全长负重位X线影像。结果36例患者均一次性完成全膝关节置换术前双下肢全长负重位X线检查,其中膝关节内翻畸形34例,外翻畸形2例。所摄X线片中,患者双髋关节、股骨、膝关节、胫腓骨及踝关节均显示良好,可为术前计划提供可靠依据。结论采用Slot双下肢全长负重位X线检查技术对拟接受全膝关节置换术患者进行术前检查,能够清晰显示双下肢全长,对术前计划与评估具有重要临床价值。

简介：由在活跃区域和杆聚合物的Pockels效果使用poled-polymer/silicon槽波导，我们建议一种Mach-Zehnder干涉仪(MZI)电镀物品眼(EO)开关在1550nm操作了。结构的参数为认识到正常切换的功能被优化。在槽波导参数上交换特征的相关性被调查。与170nm慭据?景瀠汯浹牥猠汯牡挠汥獬的尺寸为硅脱衣