简介：

简介：ＯＢＬＣＤＯＭＡＩＮＤＥＣＯＭＰＯＳＩＴＩＯＮＦＯＲＡＲＴＩＦＩＣＩＡＬＣＯＭＰＲＥＳＳＩＢＬＥＥＱＵＡＴＩＯＮＬｉｎＭｉｎｇｓｅｎ（林明森）；ＨｕａｎｇＬａｎｃｈｉｅｈ（黄兰洁）（ＲｅｃｅｉｖｅｄＤｅｃ．１７，１９９４；Ｃｏｍｍｕｎｉｃａｔｅｄｂｙ...

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简介：一个不安方法为解决非线性的Korteweg-deVries(KdV)在动态系统的上下文被介绍方程。最好的效率为很少perturbative修正被获得。它被看那，这条途径的集中的问题完全这里被保证，因为在系列包括的一小部分术语能描述一个足够的准确答案。有quintic花键的答案的比较，；有限差别被介绍。

简介：这篇论文在无界的领域上讨论汉堡包的方程的数字答案。二条人工的边界被介绍，边界条件在人工的边界上被获得，它在非线性的形式。然后，原来的问题在一个围住的领域上被归结为一个相等的问题。有限差别方法被用于减少的问题，并且一些数字例子被给显示出新途径的有效性。

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简介：

简介：一条球形的人工的边界上的准确边界条件在这篇论文为线性弹性的三维的外面的问题被导出。在这个边界条件在人工的边界上被强加以后，仅仅在一个围住的领域定义的一个减少的问题被获得。如果一个人在变化明确的表达截断系列条款，有增加精确性的一系列近似问题能被导出，它等价于减少的问题。错误估计被介绍显示出错误怎么取决于有限elementdiscretization和近似问题的精确性。最后，一个数字例子被给表明建议方法的表演。

简介：Theartificialboundarymethodisappliedtosolvethree-dimensionalexteriorproblems.Twokindofrotatingellipsoidsarechosenastheartificialboundariesandtheexactarti-ficialboundaryconditionsarederivedexplicitlyintermsofaninfiniteseries.Thenthewell-posednessofthecoupledvariationalproblemisobtained.Itisfoundthaterroresti-matesderiveddependonthemeshsize,truncationtermandthelocationoftheartificialboundary.Threenumericalexamplesarepresentedtodemonstratetheeffectivenessandaccuracyoftheproposedmethod.

简介：Thelifetimeofanartificialsatellitemovinginthecircularorbitundertheactionofnonuniformrotatingatmosphericdragisstudiedfromanenergypointofviewinthispaper.Theangularvelocityofatmosphericrotationdecreaseswithheightaccordingtohydrodynamics.Theatmosphericdensitydecreaseswithheightaccordingtotheexponentialformula.Theexpressionforthelifetimeofasatelliteintheinstantaneouscircularorbitintheabove-mentionedrotatingatmosphericmodelisderived,andthenumericalestimationforthelifetimeofaconcretesatellitehasbeenmade.Theresultshowsclearlythatthesatellitelifetimecalculatedbythispaperisshorterthanthatcalculatedbytheuniformrotatingatmosphericmodel.

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简介：AfiniteelementmethodforthesolutionofOseenequationinexteriordomainisproposed.Inthismethod,acircularartificialboundaryisintroducedtomakethecomputationaldomainfinite.Then,theexactrelationbetweenthenormalstressandtheprescribedvelocityfieldontheartificialboundarycanbeobtainedanalytically.Thisrelationcanserveasanboundaryconditionfortheboundaryvalueproblemdefinedonthefinitedomainboundedbytheartificialboundary.Numericalexperimentispresentedtodemonstratetheperformanceofthemethod.

简介：Three—layerback—propagationneuralnetworkswereusedforprocessingtheinformationprovidedbytheultravioletspectraoffive—componentmixtures,affectingthesimultaneousdeterminationofthecomponentswithsatisfactoryresults.

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简介：Thenon-linearrelationshipsbetweenthecontentsofginsenosideRg1,Rb1,RdandPanaxnotoginsengsaponins(PNS)inPanaxnotoginsengrootherbandthenearinfrared(NIR)diffusereflectancespectraoftheherbwereestablishedbymeansofartificialneuralnetworks(ANNs).Fourthree-layeredperceptionfeed-forwardnetworksweretrainedwithanerrorback-propagationalgorithm.ThesignificantprincipalcomponentsoftheNIRspectraldatamatrixwereutilizedastheinputofthenetworks.Thenetworksarchitectureandparameterswereselectedsoastoofferlesspredictionerrors.RelativepredictionerrorsforRg1,Rb1,RdandPNSobtainedwiththeoptimumANNmodelswere8.99%,6.54%,8.29%,and5.17%,respectively,whichweresuperiortothoseobtainedwithPLSRmethods.ItisverifiedthatANNisasuitableapproachtomodelthiscomplexnon-linearity.Thedevelopedmethodisfast,non-destructiveandaccurateanditprovidesanewefficientapproachfordeterminingtheactivecomponentsinthecomplexsystemofnaturalherbs.

简介：Inthispaper,weproposeanovelapproachtoachievespectrumprediction,parameterfitting,inversedesign,andperformanceoptimizationfortheplasmonicwaveguide-coupledwithcavitiesstructure(PWCCS)basedonartificialneuralnetworks(ANNs).TheFanoresonanceandplasmon-inducedtransparencyeffectoriginatedfromthePWCCShavebeenselectedasillustrationstoverifytheeffectivenessofANNs.WeusethegeneticalgorithmtodesignthenetworkarchitectureandselectthehyperparametersforANNs.OnceANNsaretrainedbyusingasmallsamplingofthedatageneratedbytheMonteCarlomethod,thetransmissionspectrapredictedbytheANNsarequiteapproximatetothesimulatedresults.Thephysicalmechanismsbehindthephenomenaarediscussedtheoretically,andtheuncertainparametersinthetheoreticalmodelsarefittedbyutilizingthetrainedANNs.Moreimportantly,ourresultsdemonstratethatthismodel-drivenmethodnotonlyrealizestheinversedesignofthePWCCSwithhighprecisionbutalsooptimizessomecriticalperformancemetricsforthetransmissionspectrum.Comparedwithpreviousworks,weconstructanovelmodel-drivenanalysismethodforthePWCCSthatisexpectedtohavesignificantapplicationsinthedevicedesign,performanceoptimization,variabilityanalysis,defectdetection,theoreticalmodeling,opticalinterconnects,andsoon.

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简介：合适的频率试验性地被选择是电磁的声学的变换器的操作频率。从钢和橡胶材料的一件多层的粘合剂样品的检测超声的回响的即时振幅，阶段和频率被计算并且创作了形成成功把严峻的信号与不同粘合剂状态品质上区分开来的三维的即时光谱。然后，在敏感时间窗户中的平均即时参数被拣起并且为BP人工的神经网络用作输入特徵向量。在训练并且测试体积的识别结果证明检测了电磁的超声的界面的回响能与比95%大的正确性比率自动地被识别并且分类。

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简介：TB4397063840含n≈k超薄金属膜的周期对称膜系的性质及窄带高反膜设计=Characteristicsofperiodicsymmetricalmultilayercoatingsincludingultrathinmetallicfilmofn≈kanddesignofahigh-refIectivityreflectionfilterwithnarrowbandwidth[刊,中]/谭满清,林永昌,赵达尊(北京理工大学.北京(100081))