简介：读故事，制造声音，并帮Zog解决怪物谜团。

简介：这份报纸早为地震评估不同特征警告。在大小，震中距离和计算参数之间的可伸缩的关系从USGS从地震事件数据被导出。标准STA/LTA方法被增加二个新参数在P波浪的发作前消除尖铁类型噪音和小pulsetype噪音的效果修改。在P波浪的察觉以后，算法从P波浪的开始的3秒提取12种参数。这些参数的然后逐步的回归分析被执行估计震央的距离和大小。六个不同参数被选择估计震央的距离，和为所有419估计的中部的错误是16.5km。四个参数最佳地被联合估计大小，并且为所有事件的吝啬的错误是0.0个大小单位，与0.5的标准差。基于评价结果，最后，另外的工作被建议改进结果的精确性。

简介：Thefar-fieldnoiseradiatedfrommixinglayersisdeterminedbythenear-fieldflowdynamicswhichissensitivetotheinitialperturbationofinstabilityintroducedphysicallyornumerically.Thisstudyfocusesontheeffectsofthephasedelayintwoinitialperturbations,oneatthefundamentalwavenumberandtheotheratitssubharmonicbothcalculatedfromlinearinstabilityanalysis,onthesoundgenerationinmixinglayers.Whendifferentphasedelaysφ_1changingfromzeroto2πisappliedonthefundamentalmode,weobservedifferentvortexmergingprocesses(e.g.vortexpairingortearing).Thestrongnonlinearinteractioninthemergingprocessgeneratesmostofthenoisefrommixinglayers.Thereshowsapatterninaperiodof2πfortheresponseoffar-fieldsoundtothechangeofφ_1.Similareffectsonthedynamicsandacousticscanbeachievedbyaddingdifferentphasedelaysφ_2tothesubharmonicmodeinstead,however,theresponserepeatsinaperiodofonlyπforφ_2.Theeffectsofthecombinationofdifferentphasedelaystootherparameters,includingtheamplitudeandwavenumberforeachperturbations,arealsoinvestigated.Alltheresultsindicateacriticalroleofnonlinearityinthesoundgenerationmechanismofmixinglayers.

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简介：Shearprobeworksunderatoughenvironmentwheretheturbulencesignalstobemeasuredareveryweak.Themeasuredturbulencesignalsoftencontainalargeamountofnoise.Duetowidefrequencyband,noisesignalscannotbeeffectivelyremovedbytraditionalmethodsbasedonFouriertransform.Inthispaper,awaveletthresholdingdenoisingmethodisproposedforturbulencesignalprocessinginthatwaveletanalysiscanbeusedformulti-resolutionanalysisandcanextractlocalcharacteristicsofthesignalsinbothtimeandfrequencydomains.Turbulencesignaldenoisingprocessismodeledbasedonthewavelettheoryandcharacteristicsoftheturbulencesignal.Thethresholdanddecompositionlevel,aswellastheprocedureoftheturbulencesignaldenoising,aredeterminedusingthewaveletthresholdingmethod.TheproposedwaveletthresholdingmethodwasvalidatedbyturbulencesignaldenoisingoftheWesternPacificOceantrialdata.Theresultsshowthatthepropsedmethodcanreducethenoiseinthemeasuredsignalsbyshearprobes,andthefrequencyspectrumsofthedenoisedsignalcorrespondwelltotheNasmythspectrum.

简介：为了更好认识到，鸣回响识别在水下有重重地不平的表面的材料，基于信号的理论，稀少的分解被建议了的一个特征抽象方法。而不是普通拍子频率字典，训练回响样品的集合直接被用作字典认识到回响在L1优化和摘要下面的稀少的分解回响的一种精力特征。包括钴外壳的三种底部材料的实验证明有这个方法的菲希尔分发比边特征并且在小浪领域的单个值分解SVD特征的优异。它无疑意味着那么更好的分类结果在水下底部材料能比其它与建议精力特征被获得二。因为一本字典是可行的，回响的班信息由这字典罐头帮助介绍获得更好的回响特征，回响样品使用了，这被结束因为一本字典是可行的。

简介：激光阶段噪音(LPN)在光协调系统起一个重要作用。基于Viterbi-Viterbi搬运人阶段评价(用户终端设备)的算法，在协调接收装置上强加的LPN的效果为调音的照阶段移动(QPSK)被调查，调音的8阶段移动(8PSK)和16照振幅调整(16正交调幅)光协调系统分别地。模拟结果证明在阶段评价算法的最佳的块长度是在LPN和添加剂白人Gaussian噪音(AWGN)之间的折衷，并且取决于调整格式的水平。到在协调接收装置的数字变换器(模数转换器)的类似物的决定要求独立于LPN或调整格式的水平。为103的位错误率(BER)，模数转换器的要求的位数字是6，并且获得为更高的分辨率是边缘的。

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简介：Airfoilself-noiseisacommonphenomenonformanyengineeringapplications.Aimingtostudytheunderlyingmechanismofairfoilself-noiseatlowMachnumberandmoderateReynoldsnumberflow,anumericalinvestigationispresentedonnoisegenerationbyflowpastNACA0018airfoil.Basedonahigh-orderaccuratenumericalmethod,boththenear-fieldhydrodynamicsandthefar-fieldacousticsarecomputedsimultaneouslybyperformingdirectnumericalsimulation.Themeanflowpropertiesagreewellwiththeexperimentalmeasurements.Thecharacteristicsofaerodynamicnoiseareinvestigatedatvariousanglesofattack.Theobtainedresultsshowthatincliningtheairfoilcouldenlargeturbulentintensityandproducelargerscaleofvortices.Thesoundradiationismainlytowardstheupperandlowerdirectionsoftheairfoilsurface.Athigherangleofattack,thetonalnoisetendstodisappearandthenoisespectrumdisplaysbroad-bandfeatures.

简介：这研究的目的是基于它的感性的性质揭示噪音烦恼的原因。从自相关功能ACF提取的可得到的物理因素被用来解释主要感觉和道路车辆噪音的代表性的感性的性质。二个新奇因素，EMD和ESM，特别为测量ACF信封的变化和光滑使用，被建议。这应该被指出如果除了0，1不是最大的价值，两并且-被建议被补充说。三主要感觉大声，程度，和音质被把princi-伙伴部件分析用于从232件噪音样品提取的ACF因素获得了。从10个题目，烦恼规模价值在wellcontrolled下面用大小评价途径被调查试验性的条件。当然在那里存在，这被认识到为每种主要感觉的基本因素。不同ACF特征能导致多样的主导的感觉，它将控制或决定噪音的感性的性质。在主要感觉的主导的感觉和优先级差别的可变性将拿出主观烦恼。而且，基本因素的混合将使听觉的特征糊涂，并且导致主观烦恼。换句话说，它是引起并且影响噪音烦恼的感性的性质的混乱。

简介：<正>Background:Stochasticresonancestimulation(SRS)transmitssubsensoryelectricalGaussianwhitenoiseintothebodytoenhancesensorimotorfunction.Thistherapyhasimprovedstaticsinglelegbalanceinsubjectswithfunctionalankleinstability.However,theeffectofthisstimulationondynamicsinglelegbalanceisnotknown.ImprovementsindynamicsinglelegbalancewithSRSmayhaveimplicationsForenhancingfunctionalrehabilitationforankleinstability.Thus,thepurposeofthisstudywastodeterminetheeffectsofSRSondynamicsinglelegbalanceinsubjectswithfunctionalankleinstability.Methods:Thisstudywasanexperimentalresearchdesignanddatawerecollectedinasportsmedicineresearchlaboratory.Twelvesubjectswithfunctionalankleinstability(69±15kg;173±10cm;21±2years)reportedahistoryofanklesprainsandinstabilityattheanklewithphysicalactivity.Asinglelegjump-landingtestwasusedtoassessdynamicbalance.Subjectswererequiredtojumpbetween50%and55%ofthemaximalverticaljumpheight,landonasinglelegatopaforceplate,andstabilizeasquicklyaspossible.Jump-landingtestswereperformedwithandwithoutSRS.Threetrialswereperformedforeachtreatmentcondition(SRSandcontrol).Arandomizedblockdesignwasusedtodeterminetestorder.Anterior/posteriorandmedial/lateraltime-to-stabilizationwerecomputedtoassessdynamicbalance.Lessertimeindicatedbetterstability.One-tailedpairedsamplesttestswereusedforanalysis(α≤0.05).Results:SRSimprovedanterior/posteriortime-to-stabilization(stochasticresonance=1.32±0.31s,control=1.74±0.80s,p=0.03),butdidnotenhancemedial/lateraltime-to-stabilization(stochasticresonance=1.95±0.40s,control=1.92±0.48s,p=0.07).Conclusion:CliniciansmightuseSRStofacilitatebalanceimprovementswithsagittalplanedynamicsinglelegbalanceexercisesthatpatientsmaynotbeabletoperformotherwise.

简介：一条多维的计算液体动力学(CFD)途径在试图计算一台引擎的转移矩阵的这研究被建议有或没有吝啬的流动处于条件用尽muffler。没有吝啬的流动，有定义为多孔的地区的吸收性的材料的muffler的CFD模型与测量噪音减小被校准，并且进一步被采用在muffler的声学的表演上学习吝啬的流动的效果。而且，exhaust听觉的来源从建议CFD途径以及测量尾巴噪音最不基于multiload获得的六不同另外的声学的负担的计算转移矩阵被导出广场方法。最后，exhaust噪音基于Thevenins定理被预言。建议CFD途径被建议能就吝啬的流动而言预言复杂muffler的声学的表演(没有并且与吝啬的流动)并且加热转移，并且提供exhaust噪音的合理结果。

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简介：Four-wavemixing,aswellasitsinducedintensitynoise,isharmfultowavelengthdivisionmultiplexingsystems.Theefficiencyandtherelativeintensitynoiseoffour-wavemixingarenumericallysimulatedforthetwo-waveandthethree-wavefibertransmissions.Itisfoundthattheefficiencydecreaseswiththeincreaseofboththefrequencyspacingandthefiberlength,whichcanbeexplainedusingthequasi-phase-matchingcondition.Furthermore,therelativeintensitynoisedecreaseswiththeincreaseoffrequencyspacing,whileitincreaseswiththeincreaseoffiberlength,whichisduetotheconsiderablepowerlossofthepumplight.Thisinvestigationpresentsagoodreferenceforthepracticalapplicationofwavelengthdivisionmultiplexingsystems.

简介：在现在的纸，最大的Lyapunov代表为一种合作尺寸被调查在上的二个分叉系统一三维中央对由围住的噪音的参量的刺激歧管、使\O遭到。由使用一个不安方法，一个一个维的阶段散开过程的不变的措施的表情为三个案例被获得，在哪个矩阵B的不同形式，那在噪音刺激术语被包括，被假定然后作为结果，为一个维的阶段散开过程的所有三种单个边界被分析。经由Monte-Carlo模拟，我们发现不变的措施的分析表情遇见数字的很好。并且而且，P分叉行为为一个维的阶段散开过程被调查。为为一个维的阶段散开过程的单个边界的三个案例，最后，最大的Lyapunov代表的分析表达式为随机的分叉系统被介绍。

简介：我们试验性地表明并且分析10Gbit/s完整的双波长部门multiplexing被动光网络(WDM-PON)系统。non-return-to-zero调音的微分阶段移动(NRZ-DPSK)调整技术首先为downlink方向被利用，然后downlink信号每隧道与10Gbit/s的数据率用调音的开关(OOK)的紧张调整技术为uplink方向被重新调制。一个有效无色WDM-PON完整的双传播系统与低力量惩罚在25km的距离上与60GHz的隧道间距每隧道为10Gbit/s的数据率被完成。

简介：Ademultiplexingschemebasedonsemiconductoropticalamplifier(SOA)andopticalfilterforopticaltimedivisionmultiplexingdifferentialquadraturephaseshiftkeying(OTDM-DQPSK)systemisproposedandinvestigatedexperimentally.Withonlyacommonhalfbaudrateelectricalclockmodulated33%dutycyclereturn-to-zero(RZ-33)opticalclocksignalaspump,thisschemeiscost-effective,energy-efficient,andintegration-potential.Aproof-of-conceptexperimentiscarriedoutforthedemultiplexingofa2×40-GBdOTDM-DQPSKsignal.Error-freeperformanceisdemonstrated,andtheaveragepowerpenaltyforbothchannelsisabout3dB.

简介：Opticalperformancemonitoringusingasynchronousopticalorelectricalsamplinghasgainedconsiderableattention.Relativeclockwanderbetweendatasignalandsamplingsourceisatypicaloccurrenceinsuchsystems.Amethodforthequantitativemonitoringoftherelativeclockwanderinasynchronousopticalundersamplingsystemispresented.Withaseriesofsimulations,theclockwandersrecoveredusingthismethodareingoodagreementwiththepresetclockwandersofdifferentamountsandfrequenciesforbothRZandNRZsignals.Hence,thereliabilityandrobustnessofthemethodareproven.

简介：Toimprovethereliabilityandaccuracyoftheglobalpositioningsystem(GPS)/microelectromechanicalsystem(MEMS)inertialnavigationsystem(INS)integratednavigationsystem,thispaperproposestwodifferentmethods.Basedonwaveletthresholddenoisingandfunctionalcoefficientautoregressive(FAR)modeling,acombineddataprocessingmethodispresentedforMEMSinertialsensor,andGPSattitudeinformationisalsointroducedtoimprovetheestimationaccuracyofMEMSinertialsensorerrors.ThenthepositioningaccuracyduringGPSsignalshortoutageisenhanced.ToimprovethepositioningaccuracywhenaGPSsignalisblockedforlongtimeandsolvetheproblemofthetraditionaladaptiveneuro-fuzzyinferencesystem(ANFIS)methodwithpoordynamicadaptationandlargecalculationamount,aself-constructiveANFIS(SCANFIS)combinedwiththeextendedKalmanfilter(EKF)isproposedforMEMS-INSerrorsmodelingandpredicting.Experimentalroadtestresultsvalidatetheefficiencyoftheproposedmethods.