简介：本地化是在无线传感器网络的实质的问题之一。为活动烽火本地化的关键问题是怎么选择适当烽火轨道。然而，很少研究都没在它上被做。在这篇论文，第一，我们推出位置的数字让烽火根据ROI(兴趣的区域)的面积送一个包；下我们在场一个新奇方法基于虚拟力量到在任意的ROI安排位置；然后，我们使用TSP(旅行售货员问题)算法到位置顺序到获得最佳的旅游路径，即减少的烽火轨道。活动烽火什么时候沿着旅游路径移动，送RF，在每个位置发信号，在ROI的传感器能与trilateration得出他们的位置。试验性的结果证明本地化方法，基于烽火减少的路径，是有效的；有灵活精确性。

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简介：Dispersedfringesensor(DFS)isanimportantphasingsensorofnext-generationopticalastronomicaltelescopes.ThemeasurementerrorsinducedbythemeasurementnoiseofthreepistonestimationmethodsfortheDFSincludingleastsquaredfitting(LSF)method,frequencypeaklocation(FPL)methodandmainpeakposition(MPP)method,areanalyzedtheoreticallyandvalidatedexperimentallyinthispaper.Theexperimentalresultscoincidewellwiththetheoreticalanalyses.TheMPP,FPL,LSFareusedrespectivelywhentheDFSoperateswithbroadbandlight(centralwavelength:706nm,bandwidth:23nm).Thecorrespondingrootmeansquare(RMS)valueofestimatedpistonerrorcanbeachievedtobe1nm,3nm,26nm,respectively.Additionally,therangeofDFSwiththeFPLcanbemorethan100μmatthesametime.TheFPLmethodcanworkwellbothincoarseandfinephasingstageswithacceptableaccuracy,comparedwithLSFmethodandMPPmethod.

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简介：Anultrasensitivemetamaterialsensorbasedondouble-slotverticalsplitringresonators(DVSRRs)isdesignedandnumericallycalculatedintheterahertzfrequency.ThisDVSRRdesignproducesafundamentLCresonancewithaqualityfactorofabout20whentheincidencemagneticfieldcomponentnormaltotheDVSRRarray.TheresonantcharacteristicsandsensingperformanceoftheDVSRRarraydesignaresystematicallyanalyzedemployingacontrastmethodamongthreesimilarverticalsplitringresonator(SRRs)structures.Theresearchresultsshowthattheeliminationofbianisotropy,inducedbythestructuralsymmetryoftheDVSRRdesign,helpstoachieveLCresonanceofahighqualityfactor.LiftingtheSRRsupfromthesubstratesharplyreducesthedielectriclossintroducedbythesubstrate.AllthesefactorsjointlyresultinsuperiorsensitivityoftheDVSRRtotheattributesofanalytes.Themaximumrefractiveindexsensitivityis788GHz/RIUor1.04×10~5nm∕RIU.Also,theDVSRRsensormaintainsitssuperiorsensingperformanceforfabricationtolerancerangingfrom-4%to4%andwiderangeincidenceanglesupto50°underbothTEandTMilluminations.

简介：我们由分析推理和随机的模拟在一个单个阀值的传感器系统在随机的回声上调查alpha马厩噪音的效果。随机的回声在alpha马厩噪音环境发生在阀值系统，这被显示出，但是反响的效果变得作为alpha马厩索引减少或alpha马厩分发增加的偏斜度参数变弱。特别地，为Cauchy噪音，在最佳的噪音偏差参数，信号振幅和阀值之中的一种非线性的关系是为输出signal-to-noise比率使用极端值条件获得并且说明的经分解。在这通讯介绍的结果应该在non-Gaussian在信号察觉和图象恢复有申请吵闹的环境。

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简介：Decane在人的呼吸是不稳定的有机化合物(VOC)之一。在人的呼吸的decane的成功的察觉为早肺癌症诊断有广阔前景。在这份报纸，基于过滤器表面检测设备的一篇小说声学的波浪(锯)气体传感器被介绍。与一部薄氧化graphene电影涂的锯传感器被用来每百万部分地检测decane(ppm)集中。控制和信号察觉电路与插入损失的察觉分辨率用一个向量网络分析器被设计在下面到0.0001dB。当暴露了到0.2ppmdecane时，结果证明SAW传感器能与大敏感快速反应。这台设备在医药诊断和环境评价显示出巨大的潜力。

简介：Inordertoimprovetheresolutionofdigitalholographywithacommon-dimensioncharge-coupleddevice（CCD）sensor,thepointspreadfunctionsarebrieflyderivedforthecommonlyusedandpracticalpost-magnification,pre-magnification,andimage-planedigitalholographicmicroscopicsystems.Theultimateresolutionsofthesesystemsareanalyzedandcompared.Theresultsshowthattheultimatelateralresolutionofpre-magnificationdigitalholographyissuperiortothatofpost-magnificationdigitalholographyinthesameconditions.Wealsodemonstratethattheultimatelateralresolutionofimage-planedigitalholographyhasnocorrelationwiththephotosensitivedimensionoftheCCDsensor,anditisnotsignificantlyrelatedtothepixelsizeofthesensor.Moreover,boththeultimateresolutionandtheimagingqualityofimage-planedigitalholographyaresuperiortothatofpre-andpost-magnificationdigitalholographicmicroscopy.High-resolutionimaging,whoseresolutionisclosetotheultimateresolutionofthemicroscopeobjective,canbeachievedbyimage-planedigitalholographyevenwithasubmillimeter-dimensionsensor.Thissystem,bywhichperfectimagingcanbeachieved,isoptimalforcommonlyuseddigitalholographicmicroscopy.Experimentalresultsdemonstratethecorrectnessofthetheoreticalanalysis.

简介：ThroughanisotropicAgovergrowthonthesurfaceofAunanobipyramids(AuNBPs),high-purityandsizecontrolledAgnanorods(Au/AgNRs)areobtainedbyasimplifiedpurificationprocess.ThediametersoftheAu/AgNRsaredeterminedbythesizeoftheas-preparedAuNBPs,andthelengthsoftheAu/AgNRsaretunableusingdifferentamountsofAgprecursorinthegrowthsolution.Surface-enhancedRamanscattering(SERS)studiesusingRhodamine-6G(R6G)asatestmoleculeindicatethattheAu/AgNRshaveexcellentsensingpotential.ThetunableopticalpropertiesandstrongelectromagneticeffectoftheAu/AgNRs,alongwiththeirsuperiorSERSsignalenhancement,showthatAu/AgNRsarepromisingforfurtherapplicationsinplasmonsensingandbiomoleculardetection.

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简介：Tofindtheoptimalroutingisalwaysanimportanttopicinwirelesssensornetworks(WSNs).ConsideringaWSNwherethenodeshavelimitedenergy,weproposeanovelEnergy*Delaymodelbasedonantalgorithms('E&DANTS'forshort)tominimizethetimedelayintransferringafixednumberofdatapacketsinanenergy-constrainedmannerinoneround.Ourgoalisnotonlytomaximizethelifetimeofthenetworkbutalsotoprovidereal-timedatatransmissionservices.However,becauseofthetradeoffofenergyanddelayinwirelessnetworksystems,thereinforcementlearning(RL)algorithmisintroducedtotrainthemodel.Inthissurvey,theparadigmofE&DANTSisexplicatedandcomparedtootherant-basedroutingalgorithmslikeAntNetandAntChainabouttheissuesofroutinginformation,routingoverheadandadaptation.SimulationresultsshowthatourmethodperformsaboutseventimesbetterthanAntNetandalsooutperformsAntChainbymorethan150%intermsofenergycostanddelayperround.

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简介：Anultrasensitivemagneticfieldsensorbasedonacompactin-fiberMach–Zehnderinterferometer（MZI）createdintwin-corefiber（TCF）isproposed,anditsperformanceisexperimentallydemonstrated.AsectionofTCFwassplicedbetweentwosectionsofstandardsingle-modefibers,andthenamicrochannelwasdrilledthroughonecoreoftheTCFbymeansoffemtosecondlasermicromachining.TheTCFwithonemicrochannelwasthenimmersedinawater-basedFe3O4magneticfluid（MF）,formingadirectcomponentofthelightpropagationpath,andthensealedinacapillarytube,achievingamagneticsensingelement,whichmergestheadvantagesofanMZIwithanMF.Experimentswereconductedtoinvestigatethemagneticresponseoftheproposedsensor.Thedevelopedmagneticfieldsensorexhibitsalinearresponsewithinameasurementrangefrom5to9.5mTandanultrahighsensitivityof20.8nm/mT,which,toourbestknowledge,is2ordersofmagnitudegreaterthanotherpreviouslyreportedmagneticsensors.Theproposedsensorisexpectedtooffersignificantpotentialfordetectingweakmagneticfields.

简介：AhighsensitivityD-shapedholedouble-claddingfibertemperaturesensorbasedonsurfaceplasmonresonance（SPR）isdesignedandinvestigatedbyafull-vectorfiniteelementmethod.WithintheD-shapedholedoublecladdingfiber,thehollowD-sectioniscoatedwithgoldfilmandtheninjectedinahighthermo-opticcoefficientliquidtorealizethehightemperaturesensitivityforthefiberSPRtemperaturesensor.ThenumericalsimulationresultsshowthatthepeakinglossoftheD-shapedholedouble-claddingfiberSPRishugelyinfluencedbythedistancebetweentheD-shapedholeandfibercoreandbythethicknessofthegoldfilm,butthetemperaturesensitivityisalmostinsensitivetotheaboveparameters.Whenthethermo-opticcoefficientis-2.8×10-4∕℃,thethicknessofthegoldfilmis47nm,andthedistancebetweentheD-shapedholeandfibercoreis5μm,thetemperaturesensitivityoftheD-shapedholefiberSPRsensorcanreachto-3.635nm∕℃.

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