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

简介：你知道不莱梅吗？噢——它是一个美丽快乐的地方。不莱梅在哪儿呢？噢——有梦想的地方就有不莱梅。没错儿，不莱梅这个地方，早就存在于“很久很久以前”的童话里了……

简介：1名学生＋1位教师=1所学校。这个特殊的场景,出现在重庆綦江区赶水镇太公山村小。学校唯一的学生叫谭陆森,而陪伴教导他的是老教师令狐克洪。太公山村小的生源逐年减少,学生陆陆续续转到镇上就读,只剩下谭陆森一人。谭家四世同堂,家庭负担颇重,小陆森为了能与祖母互相照顾,不方便转校下山就读。于是,令狐克洪向学校申请：＂让我在太公山站好最后一班岗,照顾好最后一名学生。＂

简介：世间有一种最甜美的呼唤，那就是妈妈；世间有一种最伟大的爱，那就是母爱。那个特殊的夜晚，我读懂了那份母爱，也证明了1＋1=1这个让我疑惑很久的式子。

简介：“我们人类总是不满足的。小孩生下来，刚刚学会爬，就不满足，就想学走，刚刚学会走，就又想学跑了。”大鼻子教授一上课，就说了这样一段话，“但人们还是不满足，于是，发明了——”

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简介：１＋１＝？●魏鹏程前不久，县国税局召开征管改革现场会。两位老所长看完我们所税负核定清册后，问我们：“你们月初核定的税款，当月能如数收上来吗？”我们回答：“能”。两位老所长不信的摇摇头，并笑着说：“在农村收税，要想１＋１＝２，哪是不可能”。听了老所长的...

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