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简介：Accordingtothelower-boundtheoremoflimitanalysistheRigidFiniteElementMeth-od(RFEM)isappliedtostructurallimitanalysisandthelinearprogrammingsforlimitanalysisarededucedinthispaper.Moreover,theThermo-ParameterMethod(TPM)andParametricVariationalprinciples(PVP)areusedtoreducethecomputationaleffortwhilemaintainingtheaccuracyofsolutions.Abettersolutionisalsoobtainedinthispaper.

简介：Thispaperdealswiththelimitanalysesofperfectrigid-plasticcontinua.Basedonthekinematictheoremofthelimitanalysistheory,amathematicalprogrammingfiniteelementformulafordeterminingtheupperboundloadmultiplierhasbeenestablished,andaniterationalgorithmproposedaccordingly.Inthisalgorithmtheplasticandrigidzonesaredistinguishedforeveryiterationstep,andthegoalfunctionismodifiedgradually.Thedifficultiescausedbythenonsmoothnessofthegoalfunctionareover-come.Someexamplessolvedbythisalgorithmarepresented.

简介：WehavedevelopedacomprehensivesoftwaresuiteforbioinformaticsresearchofcDNAs;itisaimedatrapidcharacterizationofthefeaturesofgenesandtheproteinstheycode.Methodsimplementedincludethedetectionoftranslationinitiationandterminationsignals,statisticalanalysisofcodonusage,comparativestudyofaminoacidcomposition,comparativemodelingofthestructuresofproductproteins,predictionofalternativespliceforms,andmetabolicpathwayreconstruction.ThesoftwarepackageisfreelyavailableundertheGNUGeneralPublicLicenseathttp://www.g-language.org/data/cdna/.

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简介：Themainresearchobjectsinthispaperarethecausessearchingandriskestimatingmethodfortelecomenterprises'financialrisks.Themulti-modefinancingfortelecomenterprisesmakesitflexibletoinducethecapitalandobtaintheprofitbycorrespondingprojects.Buttherearealsopotentialrisksgoingwiththesefinancingmodes.Aftermakinganalysisofcategoriesandcausesoftelecomenterprises'financingrisk,amethodbyAnalyticHierarchyProcess(AHP)isputforwardtoestimatingthefinancingrisk.Andtheauthormakeshersuggestionandopinionbyexampleanalysis,inordertoprovidesomeideasandbasisfortelecomenterprise'sfinancingdecision-making.

简介：Eccentricphoto-refractionusuallyisusedasearlyeyesightdiagnostictestofinfantsandsmallchildren.Unlikecurrentlyapprovedgeometricalopticalmodelofeccentricphotorefractometer,thecrescentformationandthelight-intensitydistributioninthepupilimageofamyopiceyeareanalyzedbyFourieropticswiththeassumptionofanisotropicscatteringretina.Inthecaseoflittlecircularlightsourceandrectangularslit,thesimulationresultsofdifferentmyopicdioptersareobtainedbygeometricalopticaltheoryandFourieropticsrespectively.ItisfoundthatthesimulationresultsbyFourieropticsaresimilarasthoseobtainedbygeometricaloptics,andallsimulationsarealmostcorrespondingtotheexperimentalresult.Theresultdemonstratesthatthenewmethodpresentedhereisfeasible.

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简介：Gymnarchusniloticusswimsbyundulationsofalong-baseddorsalfin,whileitsbodyaxisisinmanycasesheldstraightduringswimming.ThispaperprovidesabriefrelevantintroductiontoGymnarchusniloticus,whichbelongstotheAfricanfreshwaterelectriceelsbutcaninspireourbionicinterestsinpropulsionbesidesitsabilitiesinelectricsensing.AspeciallarvaofGymnarchusniloticuswasmorphologicallymeasuredbyphotographingitwithapieceofscale-calibratedpaperasthebackground.ThenweanalyzedthedatabyaCFD-aidedapproach.DetailedflowpatternsaroundthelarvaandaNACA0012hydrofoilwererespectivelycalculatedandvisualizedattheReynoldsnumberof7350orso.TheresultsshowthattheprofileofGymnarchusniloticusiswellstreamlined.

简介：疲劳失败长是为轮船的一个重要问题并且近海结构。在为预言疲劳生命的众多的方法之中，光谱方法作为最可靠被接受。尽管在光谱分析后面的理论是直接的，因为它仔细与象疲劳的申请那样的批评技术细节有关正在装载，分析本身复杂、费时间(由于货物挥动压力和惯性的力量)，压力的抽取，并且压力RAO的计算。这里，四关键装载technicaldetails应用，排水量边界条件，压力RAO的计算，和疲劳压力的抽取彻底地讨论了。为每个方面，分辨率基于有限元素pre被介绍--并且processing以后软件MSC/PATRAN或FEsolverMSC/NASTRAN。决定有效、有效，它能帮助工程师表现光谱精确地并且更快使分析疲劳。

简介：WehavestudiedabiomimeticswimmerbasedonthemotionofbacteriasuchasEscherichiacoli(E.coli)theoreticallyandexperimentally.Theswimmerhasanellipsoidalcellbodypropelledbyahelicalfilament.Theperformanceofthisswimmerwasestimatedbymodelingthedynamicsofaswimmerinviscousfluid.WeappliedtheResistiveForceTheory(RFT)onthismodeltocalculatethelinearswimmingspeedandtheefficiencyofthemodel.Aparametricstudyonlinearvelocityandefficiencytooptimizethedesignofthisswimmerwasdemonstrated.Inordertovalidatethetheoreticalresults,abiomimeticswimmerwasfabricatedandanexperimentsetupwaspreparedtomeasuretheswimmingspeedandthrustforceinsiliconeoil.TheexperimentalresultsagreewellwiththetheoreticalvaluespredictedbyRFT.Inaddition,westudiedtheflowpatternssurroundingthefilamentwithafiniteelementsimulationwithdifferentReynoldsnumber(Re)tounderstandthemechanismofpropulsion.Thesimulationresultsprovideinformationonthenatureofflowpatternsgeneratedbyswimmingfilament.Furthermore,thethrustforcesfromthesimulationwerecomparedwiththethrustforcesfromtheory.Thesimulationresultsareingoodagreementwiththetheoreticalresults.

简介：摘要：煤缝接和充满煤的地区的形成是在煤累积过程的一系列因素的综合结果。煤累积系统是煤累积因素的建筑上的聚集。它能被分类进4个层次：全球煤累积超级系统，煤累积领域大系统，煤累积盆系统，和煤缝接或煤缝接设定分系统。煤累积进程是一个开、动态、灰的系统，并且是同时有象聚集的如此的性质的一个系统，关联，全部，面向目的，层次，和环境适应性。在这份报纸，我们作为一个系统拿煤累积过程学习煤缝接和充满煤的地区的起源；并且我们将讨论煤累积过程的系统的分析的方法论。作为一个例子，Ordos煤盆被调查阐明煤累积系统分析的方法的应用程序。

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简介：TheIslamicworldrepresentsanimportantforcetobereckonedwithintheinternationalpoliticalarena.Beingendowedwithhugeoilandgasresourcesandcommandingaspecialstrategicpositiononavitalrouteforinternationalcommerce,tradeandshipping,ithasalwaysbeenafocusofcontentionamongmajorpowers,andisnowanareatowhichtheU.S.globalstrategypaysspecialattention.Underthedoublepressureofeconomic

简介：objectivesTodemonstratethephenomenaandexplorethecausesofanemiainpatientswithchronicheartfailure(CHF).MethodsToobservethephenomenaofanemiainpatientswithCHF,atotalof276patientswithCHFwereincludedinthisretrospectivestudy.Theclinicalcharacteristicsofthepatientsare;meanage69.2±11.0years;male151,female125;NYHAⅢandⅣ115(41.7%).Results①Amongthe276patientswithCHF,81(29.4%)hadanemia(Meanhemoglobulinconcentration101.5±13.0g/L).②PatientswithAnemiaweremorelikelytobefemaleandtohavegreaterNYHA(ⅢorⅣ)(P<0.05),higherserumcreatinine,aswellaslowerserumalbuminandlow-densitylipoproteinlevels(P<0.01).③AweaknegativecorrelationwasalsonotedbetweenthelevelofNYHAandhemoglobulin.④Therewasnosignificantdifferenceinage,theprimarycardiacetiologyoftheCHF,thehistoryofdiabetes,leftventricularenddiastolicdiameter,andleftventricularejectionfractionbetweenCHFpatientwithandwithoutanemia.ConclusionsTheprevalenceofanemiaishighamongpatientswithCHF.TheanemiapatientswithCHFtendtobefemale,havegreatercardiacandrenalfunctionalimpairment,butwithlowerserumalbuminandLDLthatsuggestssomedegreeofmalnutrition.

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