简介：Onthebasisofenvelopespectrumanalysisofship-radiatednoise,thefeaturesandtheextractingmethodsarediscussed,andthenanewmethodofdynamicrecognitionhasbeenproposed.Usingthismethod,accuraterecognitionratefordifferenttypesofshiptargetscanbeeffectivelyimproved,andsomeoftheimportantparametersoftarget'smovementcanbeobtainedatthesametime.

简介：Thecreepeffectofsuspensionsinelectro-dynamicloudspeakerswasmodeledbasedonfractionalorderderivatives.Thefractionalstandardlinearsolid(FSLS)modelwaspresentedbysubstitutingtheAbeldashpotforNewtondashpotinStandardLinearSolid(SLS)model.TheelectricalimpedanceaswellasthetransferfunctionbetweendiaphragmdisplacementandinputvoltageofthetwotestedmidrangeloudspeakerswasmeasuredbyKlippellaseranalyzersystem,andthemodelparameterswereidentifiedbytheleast-mean-squaremethod.BycomparingthefittingresultsofFSLSmodelwiththeothertwoclassicalmodels-4ParameterLogarithmicmodelandSLSmodel,theresultsshowthattheFSLSmodelcanrightlypredictthefrequencydependentcompliancelossfactorandyieldhigheraccuracyformodelingthecreepeffectinloudspeakersuspensions.

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简介：在语音的决定，树基于州的系住，有改变叶节点的决定树与不同复杂性表示模型。由在系统性能和扬声器改编上学习模型复杂性的影响，一棵决定树动态修剪方法基于最小的描述，长度(MDL)标准被介绍。在方法，当一个起始的模型集合，和模型复杂性被增加根据改编数据的数量改变的一个惩罚参数计算，一棵训练得好的、大尺寸的语音的决定树被选择。大部分归因于起始的模型的合理选择和集成MDL标准随机、固定，由与说话者改编结合的建议方法获得高效。

简介：Toinvestigatetheglutamate-likeimmunoreactivity(Glu-IR)changesininnerhaircells(IHCs)ofguineapigscochlearafternoiseexposure.Guineapigsweredistributedinto6groupsincludingcontrolgroup(gl),andgroupsofimmediately(g2),8hours(g3),1day(g4),3days(g5)and7days(g6)afternoiseexposure.Theexperimentalgroupswereexposedto120dBLp1/3octave4kHznarrowbandnoisefor4hourstoruintheorganofCorti.ThefirstturnoftheorganofCortiwasdissectedtomakeultrathinsectionsandunderwentimmunoelectronstudy.ThedensityofgoldparticlesofGlu-IRinIHCswasmeasured.ResultsshowedthatGlu-IRinIHCsafternoiseexposurechangeddynamically.ThedensityofgoldparticleinIHCsofg2significantlyincreased(p<0.001)comparedwithglanddecreaseding3(p<0.001),whereastherewerenosignificantdifferenceinthegroupsofg4,g5andg6(p>0.05).TheresultssuggestthattheremaybeglutamateautoreceptorsinthemembraneofIHCsandtheglutamatereleasedfrompre-synapsemayactontheseautoreceptorsinapostitivefeedbackmanner,whichinduced[Ca^2+]increasedinIHCsimmediatelyafternoiseexposure.GlutamatesynthetasesystemwasactivatedbyCa^2+andmoreglutamicacidwasproduced.Inthegroupof8hoursafternoiseexposure,glutamicaciddecreasedinIHCsbecauseofitsover-releasingintosynapses.Glu-IR'srecoverytonormallevelindicatedthattheglutamateglutaminecyclemayexistinguineapigcochlea.