简介:这份报纸涉及为在逆的某未知分布式的流动的数字重建的一个有限元素方法的估计加热的一个priori错误传导问题。更精确,一些未知分布式的Neumann数据将在外部可存取的边界上用Dirichlet测量数据在内部无法接近的边界上被恢复。在这个工作的主要贡献是建立分别地,一个priori错误在领域并且在可存取/无法接近的边界上以网孔尺寸估计的一些因为温度u和伴随在最低整齐假设下面说p。集中率的更低的界限取决于领域的几何学,这被揭示。这些估计自己具有巨大的兴趣并且铺的一个priori错误为证明集中是适应技术的分析的方法把反的热传导问题的班用于一个将军。数字实验被介绍验证我们的理论预言。[从作者抽象]
简介:Inthisarticle,theseismicrecordsofJapan’sKik-netareselectedtomeasuretheacceleration,displacement,andeffectivepeakaccelerationofeachseismicrecordwithinacertaintimeafterPwave,thenacontinuousestimationisgivenonearthquakeearlywarningmagnitudethroughstatisticalanalysismethod,andWenchuanearthquakerecordisutilizedtocheckthemethod.Theresultsshowthatthereliabilityofearthquakeearlywarningmagnitudecontinuouslyincreaseswiththeincreaseoftheseismicinformation,thebiggestresidualhappensiftheaccelerationisadoptedtofitearthquakemagnitude,whichmaybecausedbyrichhigh-frequencycomponentsandlargedispersionofpeakvalueinaccelerationrecord,theinfluencecausedbythehigh-frequencycomponentscanbeeffectivelyreducediftheeffectivepeakaccelerationandpeakdisplacementisadopted,itisestimatedthatthedispersionofearthquakemagnitudeobviouslyreduces,butitiseasyforpeakdisplacementtobeaffectedbylong-perioddrifting.Invariouscomponents,theresidualenlargementphenomenonatverticaldirectionisalmostunobvious,thusitisrecommendedinthisarticlethattheeffectivepeakaccelerationatverticaldirectionispreferredtoestimateearthquakeearlywarningmagnitude.ThroughadoptingWenchuanstrongearthquakerecordtocheckthemethodmentionedinthisarticle,itisfoundthatthismethodcanbeusedtoquickly,stably,andaccuratelyestimatetheearlywarningmagnitudeofthisearthquake,whichshowsthatthismethodiscompletelyapplicableforearthquakeearlywarning.