简介：-Basedonthetheoryoflimitanalysis,theFiniteDifferenceMethod(FDM)isestablishedforevaluatingtheultimatebearingcapacityofsubsoilstobeartheunburiedpipelines.Theanalyticalresultsofbearingcapacityoftheidealclayisgiven.Theapproachtobearingcapacityevaluationofcohesionlesssubsoilswithoutsurchargeissuggested.Theresultsfromthismethodareconsistentwiththoseobtainedfrommodeltests.

简介：ATtheheadofthefirstUNlistof19""OralandlntangibleHeritagesofHumanity""publishedin2001,wasChina'sKunquopera.ThePalaccofEternalYouthhassinccbeenhailedasthebestkunqueverprodueedandtheultimatetestofperformingexcellence.

简介：延期微分系统广泛地在许多不同的域里被使用。决定他们的equilibria的本地稳定性是重要的。为有延期依赖者参数的系统，equilibria的稳定性分析复杂、困难。在这篇论文，我们将与延期依赖者参数调查典型方程的一种类型的最终的稳定性。我们的结果证明有延期依赖者参数的典型方程可以是之一在之间最终稳定、最终不稳定、交替稳定、不稳定。Applyingour结果，最终的稳定性能经常直接被决定并且不必呼吁数学软件。二个例子在这篇论文被给。

简介：ThecalculationofultimatebearingcapacityisasignificantissueinthedesignofConcreteFilledSteelTubular(CFST)archbridges.Basedonthespacebeamtheory,thispaperprovidesacalculationmethodfordeterminingtheultimatestrengthofCFSTstructures.Theaccuracyofthismethodandtheapplicabilityofthestress-strainrelationshipswerevalidatedbycomparingdifferentexistingconfinedconcreteuniaxialconstitutiverelationshipsandexperimentalresults.Comparisonoftheseresultsindicatedthatthismethodusingtheconfinedconcreteuniaxialstress-strainrelationshipscanbeusedtocalculatetheultimatestrengthandCFSTbehaviorwithsatisfactoryaccuracy.Thecalculationresultsarestableandseldomaffectedbyconcreteconstitutiverelationships.Themethodisthereforevaluableinthepracticeofengineeringdesign.Finally,theultimatestrengthofanarchbridgewithspanof330mwasinvestigatedbytheproposedmethodandthenonlinearbehaviorwasdiscussed.

简介：<正>Lastyear,1998,wasanextraordinaryyear.Inthefaceoffinancialtur-moilinternationallyandrecord--breakingfloodsdomestically,wehavestoodseveretests.Themacroeconomiccontrolpolicyadoptedbythecen-tralauthoritiestoexpandinvestmentinordertoprovideincentivestodo-mesticdemandyieldedpositiveresultsandtheeconomicgrowthratereached7.8percent.Howevertheinvestmentexpansionwasonlythebe-

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