简介：Waveenergyhasdrawnmuchattentionasanachievablewaytoexploittherenewableenergy.Atpresent,inordertoenhancethewaveenergyextraction,mosteffortshavebeenconcentratedonoptimizingthewaveenergyconvertorandthepowertake-offsystemmechanicallyandelectrically.However,focusingthewavepowerinspecificwavefieldcouldalsobeanalternativetoimprovethewaveenergyextraction.Inthisexperimentalstudy,theBraggresonanceeffectisappliedtofocusthewaveenergy.BecausetheBraggresonanceeffectoftherippledbottomlargelyamplifiesthewavereflection,leadingtoasignificantincreaseofwavefocusing.Achievedwithanenergyconversionsystemconsistingofapointabsorberandapermanentmagnetsinglephaselinearmotor,thewaveenergyextractedinthewaveflumewithandwithoutBraggresonanceeffectwasmeasuredandcomparedquantitativelyinexperiment.ItshowsthatenergyextractionbyapointabsorberfromastandingwavefieldresultedfromBraggresonanceeffectcanberemarkablyincreasedcomparedwiththatfromapropagatingwavefield(withoutBraggresonanceeffect).

简介：AstragaliRadix(AR)isoneofthemostpopularherbalmedicinesintraditionalChinesemedicine(TCM).WildARisbelievedtobeofhighquality,andsubstitutionwithcultivatedARisfrequentlyencounteredinthemarket.Inthepresentstudy,twotypesofARs(wildandcultivated)fromAstragalusmembranaceus(Fisch.)Bge.andA.membranaceusvar.mongholicus(Bge.)Hsiao,growingindifferentregionsofChina,wereanalyzedbyNMRprofilingcoupledwithmultivariateanalysis.Resultsshowedthatbothcouldbedifferentiatedsuccessfullyandcultivationpatternsorgrowingyearsmighthavegreaterimpactonthemetabolitecompositionsthanthevariety;themetabolitesresponsiblefortheseparationwereidentified.Inaddition,threeextractionmethodswerecomparedandthemethod(M1)wasusedforfurtheranalysis.InM1,theextractionsolventcomposedofwater,methanol,andchloroformintheratioof1:1:2wasusedtoobtaintheaqueousmethanol(upperlayer)andchloroform(lowerlayer)fractions,respectively,showingthebestseparation.Thedifferentialmetabolitesamongdifferentmethodswerealsorevealed.Moreover,thesucrose/glucoseratiocouldbeusedasasimpleindextodifferentiatewildandcultivatedAR.Meanwhile,thechangesofcorrelationpatternamongthedifferentialmetabolitesofthetwovarietieswerefound.TheworkdemonstratedthatNMR-basednon-targetedprofilingapproach,combinedwithmultivariatestatisticalanalysis,canbeusedasapowerfultoolfordifferentiatingARofdifferentcultivationtypesorgrowingyears.

简介：Onthesocialnetworkplatform,complaintsaboutthepublicpolicyformulationandimplementationissuesariselargely.Throughtheinformationaggregation,frequentinteraction,word-of-mouthandemotionalresonanceononlinesocialnetwork,theseinformationwillleadtotheoutbreakofthenetworkcomplaints.Itbringsdifficultiesandchallengesinpublicmanagement.Chinaisunderaperiodofsocialtransformation,andtherearevariousproblemsandcontradictions.Emergencycaneasilyarousegroupcomplaintsononlinenetwork,anditwillleadtonetworkpublicopinionthroughinducingsocialemotionalresonance,whichisharmfultosocialsecurityandstability.Thispaperhasbuilttheevaluationindexsystemfromfourdimensionswithcomplainttext’squality,transmissiontimeliness,userinteractiondegreeandemotionalresonanceexcitedbyemergency.Then,weestablishthedynamicinfluencemeasuremodelofonlinenetizenscomplaintthemebasedonanentropyweightmodel.ThemeasuremodelisprovedtobereasonableandeffectivebytheempiricalresearchofSinaWeibodata.Themodelcaneffectivelysolvethemeasureproblemofgroupcomplaintsinfluencewhentheemergenciesarousesocialemotionalresonance.Ithasimportanttheoreticalsignificanceandpracticalvalueforpublicpolicydecision-makeronlisteningtoonlinegroupcomplaints,understandingpublicopinion,andmakingpublicpolicy.

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简介：Ametallicnanostructuredarraythatscattersradiationtowardathinmetalliclayergeneratessurfaceplasmonresonancesfornormallyincidentlight.Thelocationoftheminimumofthespectralreflectivityservestodetectchangesintheindexofrefractionofthemediumunderanalysis.Thenormalincidenceoperationeasesitsintegrationwithopticalfibers.Thegeometryofthearrangementandthematerialselectionarechangedtooptimizesomeperformanceparametersassensitivity,figureofmerit,fieldenhancement,andspectralwidth.Thisoptimizationtakesintoaccountthefeasibilityofthefabrication.Theevaluatedresultsofsensitivity（1020nm/RIU）andfigureofmerit(614RIU-1)arecompetitivewiththosepreviouslyreported.

简介：轮船的Ince-Strutt稳定性图表在不规则的波浪的参量的转动回声在不规则的波浪为参量的转动回声的探索被进行并且利用。参量的转动回声将导致的轮船大振幅转动运动甚至失事。第一，在不规则的波浪描述参量的转动回声的方程根据Grims有效理论被导出，相应Ince-Strutt稳定性图表被获得。第二，为在不规则、常规的波浪的参量的转动回声的稳定性图表的差别被比较。第三，波浪阶段和高峰时期被考虑获得一个更现实主义的海条件。当分析的点在不稳定性边界附近被定位时，随机的波浪阶段的影响应该被考虑。为不同波浪高峰时期的稳定性图表是各种各样的。稳定性图表对在设计舞台的参数决心有用更好适应驾驶状况。最后，轮船变量被一条统计途径根据稳定性图表分析。metacentric高度的增加将帮助改进轮船稳定性。

简介：Thepulsedynamicsofharmonicmode-lockinginadissipativesolitonresonance(DSR)regioninanerbiumdopedfiberringlaserisinvestigatedatdifferentvaluesofanomalousdispersion.Thefiberlaserismode-lockedbyanonlinearpolarizationrotationtechnique.Byinserting0–200manomalousdispersionsingle-modefiberinthelasercavity,thecavitylengthischangedfrom17.3to217.3m,andthecorrespondingdispersionofthecavityrangesfrom-0.27to-4.67ps~2.TheobservedresultsshowthatthetuningrangeofrepetitionrateunderaharmonicDSRconditionishighlyinfluencedbythecavitydispersion.Furthermore,itisfoundthat,byautomaticallyadjustingtheirharmonicorders,thelaserscanworkatcertainvaluesofrepetitionrate,whichareindependentofthecavitylengthanddispersion.Thepulsesatthesamerepetitionrateindifferentlaserconfigurationshavesimilarproperties,demonstratingthateachachievablerepetitionraterepresentsanoperationregimeofharmonicDSRlasers.

简介：在moonpool的液体回声在同相的胀起期间由二相同的矩形的壳形成了运动被基于OpenFOAM采用二维的数字波浪斜槽调查有重正常化的包裹组(RNG)狂暴的模型。学习的焦点是在液体上与各种各样的moonpool配置检验胀起的频率和振幅的影响反响的行为。在moonpool的波浪反应的反响的频率趋于随宽度和壳起草的moonpool的增加减少，这被发现。反响的振幅的减少能为大moonpool宽度被观察。反响的振幅上的壳草稿的影响不是显著的，特别为大胀起振幅。胀起的振幅的增加在近似力量功能导致相对反响的振幅的减少，暗示胀起上的反响的振幅的复杂依赖振幅。在moonpool的附近的流动模式也被分析，主要关于胀起的频率上的依赖。因为它是难的观察旋涡结构，在moonpool的波浪反应上的旋涡的可以忽略的影响为低频率的刺激被期望。集中的旋涡的流动和旋涡结构能在反响的状况下面被识别，它产生重要驱散并且说明更小的亲戚在moonpool的反响的振幅。至于高周波的刺激，旋涡运动是相当弱的并且很快驱散，导致波浪反应振幅上的不足道的效果。

简介：Opticalwhisperinggallerymicrocavitieswithhigh-qualityfactorshaveshowngreatpotentialtowardachieveingultrahigh-sensitivitysensinguptoasinglemoleculeornanoparticle,whichraisesahugedemandonadeeptheoreticalinsightintothecrucialphenomenasuchasthemodeshift,modesplitting,andmodebroadeninginsensingexperiments.Hereweproposeanintuitivemodeltoanalyzethesephenomenafromtheviewpointofthenanoparticle-inducedmultiplescatteringoftheazimuthallypropagatingmode(APM).ThemodelunveilsexplicitrelationsbetweenthesephenomenaandthephasechangeandenergylossoftheAPMwhenscatteredatthenanoparticle;themodelalsoexplainstheobservedpolarization-dependentpreservationofoneresonanceandtheparticle-dependentredshiftorblueshift.Themodelindicatesthattheparticle-inducedcouplingbetweenthepairofunperturbeddegeneratewhisperinggallerymodes(WGMs)andthecouplingbetweentheWGMsandthefree-spaceradiationmodes,whicharewidelyadoptedincurrenttheoreticalformalisms,arerealizedviathereflectionandscattering-inducedfree-spaceradiationoftheAPM,respectively,andadditionallyexhibitsthecontributionofcrosscouplingbetweentheunperturbedWGMsandotherdifferentWGMstoformingthesplittingresonantmodes,especiallyforlargeparticles.

简介：ThephotonicspinHalleffect(SHE)hasbeenintensivelystudiedandwidelyapplied,especiallyinspinphotonics.However,theSHEisweakandisdifficulttodetectdirectly.Inthispaper,weproposeamethodtoenhanceSHEwiththeguided-wavesurface-plasmonresonance(SPR).Bycoveringadielectricwithhighrefractiveindexonthesurfaceofsilverfilm,thephotonicSHEcanbegreatlyenhanced,andagianttransverseshiftofhorizontalpolarizationstateisobservedduetotheevanescentfieldenhancementneartheinterfaceatthetopdielectriclayerandair.Themaximumtransverseshiftofthehorizontalpolarizationstatewith11.5μmisobtainedwhenthethicknessofSifilmisoptimum.ThereisatleastanorderofmagnitudeenhancementincontrastwiththetransverseshiftintheconventionalSPRconfiguration.OurresearchisimportantforprovidinganeffectivewaytoimprovethephotonicSHEandmayoffertheopportunitytocharacterizetheparametersofthedielectriclayerwiththehelpofweakmeasurementsanddevelopmentofsensorsbasedonthephotonicSHE.

简介：Wereportonthetransmissionspectraofasausage-likemicroresonator(SLM)inaqueousenvironment,whereafibertaperisusedasalightcoupler.ThetransmissionspectrashowaninterestingdependenceonthecouplingpositionbetweentheSLMandthefibertaper.WhentheSLMismovedalongthefibertaper,thelineshapecanevolveperiodicallyamongsymmetricdips,asymmetricFano-likeresonancelineshapes,andsymmetricpeaks.Acoupled-modetheorywithfeedbackisdevelopedtoexplaintheobservation.TheobservationofFano-likeresonanceinaqueousenvironmentholdsgreatpotentialinbiochemicalsensing.

简介：背叛graphene比graphene有更重要的实际意义。银nanoparticles能修改背叛graphene的光性质。我们在场此处，关于在石头威尔士(SW)的量电浆子的协调回声的详细理论分析背叛了由使用时间依赖者密度的graphene银nanowire混血儿系统功能的理论。协调效果主要是的电浆子归因于在石头威尔士之间联合背叛graphene和银nanowires的电磁的地。作为结果，混合系统的光反应展出显著改进。电浆子回声，取决于极化并且可选的调节，在宽频率区域被提高。而且，它表明一个光吸收系列的回声频率取决于SW的空格配置在混合系统的背叛graphene。这调查提供在一台基于graphene的光电的设备使用的电浆子改进效果的更好的理解。学习也提供检测在graphene存在的缺点的一个有效工具。

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∕℃.

简介：Thethird-ordernonlinearopticalpropertiesofwater-solubleCu2-xSenanocrystalsarestudiedinthenearinfraredrangeof70-980nmusingafemtosecondpulsedlaserbytheZ-scantechnique.ItisobservedthatthenonlinearopticalresponseofCu2-xSenanocrystalsissensitivelydependentontheexcitationwavelengthandexhibitstheenhancednonlinearitycomparedwithotherselenidessuchasZnSeandCdSe.TheW-shapedZ-scantrace,amixtureofthereversedsaturatedabsorptionandsaturatedabsorption,isobservedneartheplasmonresonancebandofCu2-xSenanoerystals,whichisattributedtothestate-fillingoffreecarriersgeneratedbycoppervacancies（self-dopingeffect）ofCu2-xSenanoerystalsaswellasthehotcarrierthermaleffectuponintensefemtosecondlaserexcitation.ThelargenonlinearopticalresponseandtunableplasmonicbandmakeCu2-xSenanocrystalspromisingmaterialsforapplicationsinultra-fastall-opticalswitchingdevicesaswellasnonlinearnanosensors.

简介：Wepresentastudyofthenonlinearcouplinginternalresonancefortheheaverollandpitchperformanceofasparplatformunderthewaveandvortex-inducedloadswhentheratioofthefrequenciesofheave,rollandpitchareapproximately2:1:1.Inconsiderationofvaryingwetsurface,thethreeDOFsnonlinearcoupledequationsareestablishedforthesparplatformundertheeffectofthefirst-orderwaveloadsintheheaveandpitch,andvortexinducedloadsintheroll.Byutilizingthemethodofmulti-scaleswhenthevortex-inducedfrequencyisclosetothenaturalrollfrequency,thefirst-orderperturbationsolutionisobtainedanalyticallyandfurthervalidatedbythenumericalintegration.Sensitivityanalysisisperformedtounderstandtheinfluenceofthedampingandtheinternaldetuningparameter.Twocaseswithinternalresonanceareshown.Thefirstcaseisthatnosaturationphenomenonexistsundersmallvortex-inducedloads.Thefirstorderperturbationsolutionillustratesthatonlythevortex-inducedfrequencymotioninrollandthesuper-harmonicfrequencymotioninheaveareexcited.Thesecondcaseisthatthevortex-inducedloadsarelargeenoughtoexcitethepitchandasaturationphenomenonintheheavemodefollows.Theresultsshowthatthereisnosteadyresponseoccurrenceforsomecases.Forthesecaseschaosoccursandlargeamplitudesresponsecanbeinducedbythevortex-inducedexcitation.

简介：Westudythedynamicbehaviorofaquartzcrystalresonator(QCR)inthickness-shearvibrationswiththeuppersurfacecoveredbyanarrayofmicro-beams(MBs)underlargedeflection.ThroughtakingintoaccountthecontinuousconditionsofshearforceandbendingmomentattheinterfaceofMBs/resonator,dependencesoffrequencyshiftofthecompoundQCRsystemversusmaterialparameterandgeometricalparameterareillustratedindetailfornonlinearandlinearvibrations.Itisfoundthatthefrequencyshiftproducesalittleright(left)translationforincreasingelasticmodulus(length/radiusratio)ofMBs.Moreover,thefrequencyright(left)translationdistancecausedbynonlineardeformationbecomesmoreseriousinthesecond-ordermodethaninthefirst-orderone.