简介：Thispaperintroducesthemethodofsupportvectormachine(SVM)intothefieldofsyntheticearthquakepre-diction,whichisanon-linearandcomplexseismogenicsystem.Asanexample,weapplythismethodtopredictthelargestannualmagnitudefortheNorthChinaarea(30°E-42°E,108°N-125°N)andthecapitalregion(38°E-41.5°E,114°N-120°N)onthebasisofseismicityparametersandobservedprecursorydata.ThecorrespondingpredictionratesfortheNorthChinaareaandthecapitalregionare64.1%and75%,respectively,whichshowsthatthemethodisfeasible.

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简介：Dynamicearthpressureinducedbymachinefoundationsonaneighboringretainingwallisanalyzedwithemphasisonfactorswhichcontroltheintensityandlocationofthedesignforces.ThemeshlesslocalPetrov-Galerkin(MLPG)methodisusedtoanalyzetheproblemforavarietyofretainingwallandmachinefoundationgeometries.Thesoilmediumisassumedtobehomogeneousandvisco-elastic.Themachinefoundationisidealizedasaharmonicsinusoidaldynamicforceoftenencounteredinpractice.Anumberofanalyseshavebeenmadetorevealtheeffectoftheloadingfrequency,thelocationandsizeofthefoundationandthesoilshearwavevelocityonthedistributionandmagnitudeofthedynamicearthpressure.Resultsindicatethatthereisacriticalfrequencyandacriticallocationforwhichthepassivepressuretakesthemaximaintheentiredurationofthedynamicload.