简介：Thestructuralcouplingisacommongeologicalphenomenon.ThestructuraldifferencesbetweeneasternandwesternactivecontinentalmarginsofmodernPacificandbetweenpaleo-Pacificandmodern-Pacificcontinentalmarginsarerelatedtothecharacteristicsandstatusofthesubductingoceanicplate,namely,1.subductingangle;2.changeinsubductingangle;3.subductingvelocity;4.changeinsubductingvelocity;5.subductiondepth;6.horizontaldistancebetweentheleadingedgeofthesubductingplateandthetrench;7.thestructuralformofthesubductingplateatthe670kmboundarybetweentheupperandlowermantle;8.thedisplacementandthedirectionofdisplacementofsubductingplate.Thecontrolandinfluencetowardtheshallow-levelstructuresbythedeep-levelstructuralactivitiesisadetailedrepresentationofthestructuralcouplingonactivecontinentalmargin.Thebasin-maintaincouplingphenomenonisanintracontinentalstructuralcoupling.ThefarfieldeffectofcollisionbetweenIndianplateandEurasianplateresultsintheoccurrenceofintracontinentalA-typesubductionincentralAsia,andtheA-typesubductionisthekeyfactorthatresultsintheatrophyofbasinsandtheformationofmountainsystems.

简介：ThefollowingfourconjecturesaboutstructuralofSATarestudiedinthispaper.(1)SAT∈P^SPARSE∩NP;(2)SAT∈SRTDtt;(3)SAT∈Ptt^bAPP;(4)FPtt^SAT=FTlog^SAT.ItisprovedthatsomepairsoftheseconjecturesimplyP=NP,forexample,ifSAT∈P^SPARSE∩NPandSAT∈Ptt^bAPP,orifSAT∈SRTDttandSAT∩PttbAPP,thenP=NP.Thisimprovespreviousresultsinliterature.

简介：Currently,theworldeconomyisundergoingprofoundadjustmentintheaftermathofglobalfinancialcrisis,assumingamediocresituationoflowgrowth-rate,lowinflationandhigh-debt.Atthesametime,theeconomicperformanceofChinashowssomenewsituationsandfeatures:somemajorperiodicchangesgraduallyemerge,thecontradictionandproblemofimbalanceand

简介：Evolutionarycomputationbasedontheideaofbiologicevolutionisonetypeofglobaloptimizationalgorithmthatusesself-adaptation,self-organizationandrandomsearchingtosolveoptimizationproblems.Theevolutionary-simplexalgorithmisintroducedinthispaper.Itcontainsfloatingencodingwhichcombinestheevolutionarycomputationandthesimplexalgorithmtoovcrcomctheproblemsencounteredinthegeneticalgorithmandevolutionarystrategymethods.Numericalcxpcrimcntsarcperformedusingseventypicalfunctionstoverifythealgorithm.Aninverseanalysismethodtoidentifystructuralphysicalparametersbasedonincompletedynamicresponsesobtainedfromtheanalysisinthetimedomainisprcscntcdbyusingtheevolutionary-simplexalgorithm.Themodalevolutionary-simplexalgorithmconvertedfromthetimedomaintothemodaldomainisproposedtoimprovetheinverseefficiency.Numericalcalculationsfora50-DOFsystemshowthatwhcncomparedwithothermethods,theevolutionary-simplexalgorithmoffersadvantagesofhighprecision,cfficientsearchingability,strongabilitytoresistnoise,independenceofinitialvalue,andgoodadaptationtoincompleteinformationconditions.

简介：这份报纸在通常在实验经济研究被遇到的endogeneity的存在在一个二阶段的最少的广场(2SLS)模型的结构的方程学习可变选择问题。在结构的方程的模型无常和可变选择是在安德鲁斯和陆和Caner(2009)(2001)描述了的一个重要问题。作者与endogeneity为线性结构的方程建议一个适应套索2SLS评估者并且证明它享受神谕性质，即，在评价和模型的一致性选择。在蒙特卡罗模拟，作者证明建议评估者与桥类型GMM评估者相比有更小的偏爱和MSE(Caner，2009)。在案例研究，作者重游经典回来到教育问题(Angrist和Krueger，1991)用中国人口普查数据。作者发现教育铺平不仅在收入上有强壮的效果而且在不同年龄队显示出异质。

简介：

简介：

简介：在设计应用，概率的可靠性理论看起来是一会儿然而，在许多情况中，精确概率的可靠性理论不能被认为实际事情的真实状态的模型同样足够、可信的最重要的方法。在这篇论文，当统计数据被发现不够时，我们开发了概率、非概率的可靠性理论的一个混血儿，它把结构的不明确的参数描述为间隔变量。由使用间隔分析，为计算结构的可靠性以及可靠性索引的间隔的一个新方法在这篇论文被介绍，并且传统的概率的理论与间隔分析被合并。而且，新方法保存传统的概率的可靠性理论的有用部分，但是在数据上移开它的严格的要求的限制获得。例子被举表明建议理论的可行性和有效性。

简介：Localizednatureofdamageinstructuresrequireslocalmeasurementsforstructuralhealthmonitoring.Thelocalmeasurementmeanstomeasurethelocal,usuallyhighermodesofthevibrationinastructure.Threefundamentalissuesaboutthelocalmeasurementforstructuralhealthmonitoringincluding(1)thenecessityofmakinglocalmeasurement,(2)thedifficultyofmakinglocalmeasurementand(3)howtomakelocalmeasurementareaddressedinthispaper.Theresultsfromboththeanalysisandthetestsshowthatthelocalmeasurementcansuccessfullymonitorthestructuralhealthstatusaslongasthelocalmodesareexcited.Unfortunately,theresultsalsoillustratethatitisdifficulttoexcitelocalmodesinastructure.Therefore,inordertocarrystructuralhealthmonitoringintoeffect,wemust(1)ensurethatthelocalmodesareexcited,and(2)deployenoughsensorsinastructuresothatthelocalmodescanbemonitored.

简介：

简介：原子磁性的回声光谱学(~1H-NMR)，同步荧光spectrometry(SFS)和钌离子催化的质子氧化(RICO)方法被用来在阿曼残余部分决定polyaromatic原子核的化学结构。~1H-NMR分析的结果证明在aromatics，树脂和沥青质单位的芳香的戒指的平均数字分别地是3.2，5.6和8.2。SFS被用来在残余部分，在aromatics的芳香的戒指的主要分发范围，树脂和沥青质调查芳香的戒指的分发分别地是3-4戒指，3-5戒指和超过5枚戒指。在残余部分的芳香的网络被氧化生产众多的羧基的酸。benzenepolycarboxylic酸的类型和内容benzenetricarboxylic酸，benzenetetracarboxylic酸，benzenepentacarboxylic酸和benzenehexacarboxylic酸例如酞酸酸，在核心揭示了芳香的原子核的压缩类型。联本基部分(BIPH)，压缩cata的部分(CATA)，压缩仙子的部分(仙子)和压缩索引(BCI)基于形成的benzenepolycarboxylic酸被计算。结果暗示在所有残余部分有更少的联本基类型结构。aromatics部分几乎由压缩cata的类型系统组成，并且，沥青质部分完全在树脂部分由压缩仙子的类型系统组成共存二种类型，此处压缩仙子的类型在压缩cata的类型上是占优势的。基于在学习，部件-aromatics,树脂和沥青质获得的分析结果-被给多半结构的模型。

简介：

简介：Sincetheseventies,worldeconomyhasbeenengagedinadjustmentprinci-pallyinthefollowingthreefields.First,theshiftofeconomicdevelopmentmodefromthatofaggregatequantitativegrowthtothatofquality-effective-ness.Second,thereformofeconomicsystemwithmoreandmorecountriesrealiz-ingmarketeconomy.Third,theeconomygettingmoreopenedaseconomicglobal-izationfurtheravdances.

简介：WithtechnicalassistancefromINBARandtheResearchInstituteofWoodIndustryoftheChineseAcademyofForestry,theconstructionofthePingbianPrimarySchoolwascompletedin2004,wherebambooplywoodpanelsandlaminatedbeamswereusedfortherooftrusses,sheathingboardsandwallpanels.Thisisthefirsttimethatbamboo-basedpanelsareusedforstructuralapplications.

简介：

简介：Anewmethodisputforwardforstructuraldamageidentificationbasedonthehomotopycontinuationalgorithm.Anumericalexampleispresentedtoverifythemethod.Thebeamswithdifferentdamagelocationsanddifferentdamageextentsareidentifiedbythismethod.Thenumericalexampleshaveprovedthatthisnewmethodiscapableofeasyconvergence,whichisnotsensitivetotheinitialiterativevalues.Itiseffectiveforaccuratelyidentifyingmultipledamages.Byincorporatingthefiniteelementmethodintothehomotopycontinuationalgorithm,thedamageidentifyingabilityofthenewmethodcanbegreatlyenhanced.

简介：Theoxidationbehaviorofthreebiodieselsofdifferentorigins,viz.rapeseedoilderivedbiodiesel,soybeanoilderivedbiodieselandwasteoilbasedbiodiesel,weretestedonanoxidationtester.Thechemicalcompositionsofthebiodieselswerecharacterizedbygaschromatography.Thereafter,thestructuraltransformationoffattyacidmethylester(FAME)ofthebiodieselswasanalyzedbyaninfraredspectrometerandanultravioletabsorptionspectrometer.TheresultsdemonstratedthattheoxidationbehaviorofbiodieselsofdifferentoriginswascloselyrelatedtothecompositionanddistributionofFAMEs.HigherconcentrationofunsaturatedFAMEwithmulti-doublebondsexhibitedpooreroxidationresistance.Furthermore,cis-transisomerizationtransformationoccurredintheunsaturatedFAMEmoleculesandconjugateddouble-bondproducedduringtheoxidationprocessofbiodiesel.Greatercis-transvariationscorrespondedtodeeperoxidationdegree.ThehigherthecontentofunsaturatedFAMEwithmulti-doublebondsinabiodiesel,themoretheconjugateddoublebondswasformed.

简介：

简介：

简介：Asystemreliabilityestimationmethodforspatialjacketplatformsisdevelopedinthispaper,Thejacketplatformismodeledintothree-dimensionalassemblyofspatialbeamandplateelementsinFi-niteElementMethod(FEM).Thelimitfailurestatescorrespondtocollapseofaseriesofstructuralmem-berswhichareidentifiedbyengineeringdesigncriteria.Inthispaperthefollowingaspectsaretakenintoaccount:thepunchingshearandbuckiingfailuresinmemberfailuremodesforthetubularjointsandtubu-larcolumnsrespectively;incrementalloadingapproachforestablishmentofthesafetymarginequationsofsystemfailure;thealgorithmofenumeratingsignificantfailuremodesforthestructuralsystemsandotherconcepts,suchasthefalsefailuremodeandthevirtuallimitstate.Thefinalworkisdevotedtothereliabili-tyanalysisforapracticaljacketplatformpresentlyputintooperationontheBohaiSea.Thecomputedre-sultsshowsthatmethodsuggestedinthispaperisfeasibleandeffectivefor