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292 个结果
  • 简介:—Thepresentstudyinvestigatestheinteractionofsteepwaveswithsemi-circularbreakwaterwiththecomplexplane'sCauchyboundaryintegraltheorem.Theboundaryintegralmethodisusedtotransformthecalculationinfluiddomainintoitsboundaryalone.Inthecalculationthecomputationdo-mainismovedwiththepropagationofwaves.AnumericalsolutionisobtainedforincidentStokeswavespassingthesubmergedobstacles.Thismethodhasbeenextendedtothecalculationofwaverun-uponaslopeforestimatingwaveovertopping.

  • 标签: SEMI-CIRCULAR BREAKWATER water WAVES interaction CAUCHY
  • 简介:—Theresultsofdesignandexperimentofasubmergedsemi-circularbreakwaterattheYangtzeestuaryshowthatthesubmergedstructurewillbeunsafewhenthegeneralempiricalwaveforceformulaforsemi-circularbreakwaterisusedindesign.Therefore,anewcalculationmethodforthewaveforcesact-ingonasubmergedsemi-circularstructureisgiveninthispaper,inwhichthewaveforceactingonthein-sidecircumferenceofsemi-circulararchisincluded,andthephasemodificationcoefficientinthegeneralempiricalformulaisadjustedaswell.Thenewwaveforcecalculationmethodhasbeenverifiedbythere-sultsofsevenrelatedphysicalmodeltestsandadoptedinthedesignofthesouthesturaryjettyofthefirststageprojectofDeepChannelImprovementProjectoftheYangtzeRiverEstuary,thetotaljettylengthbe-ing17.5km.

  • 标签: SEMI-CIRCULAR BREAKWATER SUBMERGED structure ESTUARY jetty
  • 简介:Thispaperpresentsaclosed-formsolutionfordiffractionofplaneSHwavesbyasemi-circularcavityinhalf-spacebyusingwavefunctionexpansionmethod.Accuracyofthesolutionischeckedbythedisplacementresidualandstressresidualalongtheboundaries.Numericalresultsshowthattherearenotabledifferencesforresponseamplitudesbetweenasemi-circularcavityandawhole-circularcavityinahalf-space.

  • 标签: 平面SH波 半圆孔 半空间 衍射 波函数展开法 封闭形式解
  • 简介:Aradialcrackemanatingfromasemi-circularnotchisofsignificantengineeringimportance.Accuratedeterminationofkeyfracturemechanicsparametersisessentialfordamagetolerancedesignandfatiguecrackgrowthlifepredictions.Thepurposeofthispaperistoprovideanefficientandaccurateclosed-formweightfunctionapproachtothecalculationofcracksurfacedisplacementsforaradialcrackemanatingfromasemi-circularnotchinasemi-infiniteplate.Resultsarepresentedfortwoloadconditions:remoteappliedstressanduniformstresssegmentappliedtocracksurfaces.Basedonacorrectionofstressintensityfactorratio,highlyaccurateanalyticalequationsofcracksurfacedisplacementsunderthetwoloadconditionsaredevelopedbyfittingthedataobtainedwiththeweightfunctionmethod.ItisdemonstratedthattheWuCarlssonclosed-formweightfunctionsareveryefficient,accurateandeasy-to-useforcalculatingcracksurfacedisplacementsforarbitraryloadconditions.Themethodwillfacilitatefatiguecrackclosureandotherfracturemechanicsanalyseswhereaccuratecracksurfacedisplacementsarerequired.

  • 标签: 径向裂纹 表面位移 函数方法 缺口 疲劳裂纹扩展 测定
  • 简介:Theearth’ssurfaceirregularitiescansubstantiallyaffectseismicwavesandinduceamplificationsofgroundmotions.Thisstudyinvestigateswhetherandhowthesourcecharacteristicsaffectthesiteamplificationeffects.Ananalyticalmodelofalinesourceofcylindricalwavesimpingingonanalluvialvalleyisproposedtolinkthesourceandsite.Theanalyticalsolutiontothisproblemprovesoneaspectofthestrongeffectofsourceonsiteamplification,i.e.,thewavecurvatureeffect.Itisfoundthatthesiteamplificationdependsonthesourcelocation,especiallyunderconditionsofasmallsource-to-sitedistance.Whetherthedisplacementisamplifiedorreducedandthesizeoftheamplificationorreductionmaybedeterminedbythelocationofthesource.Itissuggestedthattraditionalstudiesofsiteresponses,whichusuallyignorethesourceeffect,shouldbefurtherimprovedbycombiningthesourcewithsiteeffects.

  • 标签: site EFFECTS source EFFECTS wave function
  • 简介:Basedontheextendedhomogeneouscapacityhighprecisionintegrationmethodandthespectrummethodofvirtualboundarywithacomplexradiusvector,anovelsemi-analyticalmethod,whichhassatisfactorycomputationeffectivenessandprecision,ispresentedforsolvingtheacousticradiationfromasubmergedinfinitenon-circularcylindricalshellstiffenedbylongitudinalribsbymeansoftheFourierintegraltransformationandstationaryphasemethod.Inthiswork,besidesthenormalinteractingforce,whichiscommonlyadoptedbysomeresearchers,theotherinteractingforcesandmomentsbetweenthelongitudinalribsandthenon-circularcylindricalshellareconsideredatthesametime.Theeffectsofthenumberandthesizeofthecross-sectionoflongitudinalribsonthecharacteristicsofacousticradiationareinvestigated.NumericalresultsshowthatthemethodproposedismoreefficientthantheexistingmixedFE-BEmethod.

  • 标签: 同源体积高精度积分法 光谱法 矩阵转换法 柱形壳强化
  • 简介:AnanalyticalsolutionforscatteringofincidentSHwavesbyacircular-archillwithaconcentriccirculartunnelwasderivedbyFourier-Besselseriesexpansionandauxiliaryfunctionstechnique.Thesolutionisreducedtosolvingasetofinfinitelinearalgebraicequationsfinally.Theaccuraciesofthenumericalresultsarecheckedbytheresidualerrorsofboundaryconditionswiththetruncationorderincreasing.Thenumericalresultsshowthattheexistenceanddimensionofthetunnelhavegreateffectonmotionofthegroundsurfacenearbyanddynamicstressconcentrationofthetunnel.

  • 标签: HILL TUNNEL SCATTERING PLANE SH WAVES
  • 简介:AsanewlydiscoveredtypeofRNA,circularRNAs(circRNAs)arewidespreadthroughouttheeukaryoticgenome.TheexpressionofcircRNAsisregulatedbybothcis-elementsandtrans-factors,andtheexpressionpatternofcircRNAsiscelltype-anddiseasespecific.Similartoothertypesofnon-codingRNAs,functionsofcircRNAsarealsoversatile.CircRNAshavebeenreportedpreviouslytofunctionasmicroRNA(miRNA)sponges,proteinsponges,codingRNAsorscaffoldsforproteincomplexes.Recently,severalcircRNAshavebeenreportedtoplayimportantrolesinhumanmalignancies,includingglioma.Here,wereviewedseveralreportsrelatedtocircRNAsandglioma,aswellasthepotentialdiagnosticandtherapeuticapplicationsofcircRNAsinbraincancer.Ingeneral,somecircRNAs,suchascircSMARCA5andcircCFH,arefoundtobeexpressedinagliomaspecificpattern,thesecircRNAsmaybeusedastumorbiomarkers.Inaddition,somecircRNAshavebeenfoundtoplayoncogenicrolesinglioma(e.g.,circNFIXandcircNT5E),whereasothershavebeenreportedtofunctionastumorsuppressors(e.g.,circFBXW7andcircSHPRH).Furthermore,circRNAisagoodtoolforproteinexpressionbecauseofitshigherstabilitycomparedtolinearRNAs.Thus,circRNAsmayalsobeanidealchoiceforgene/proteindeliveryinfuturebraincancertherapies.TherearesomechallengesincircRNAresearchingliomaandotherdiseases.ResearchrelatedtocircRNAsingliomaiscomparativelynewandmanymysteriesremaintobesolved.

  • 标签: CIRCULAR RNA GLIOMA miRNA SPONGE translation
  • 简介:AbstractGastric cancer (GC) is a common malignancy and is the third leading cause of cancer-related death. At present, there is no simple and effective screening method for early-stage GC, and the treatment results and prognosis are poor. With the continuous improvement of molecular biology techniques, research on circular RNA (circRNA) has gradually expanded over time. Much data supports the role of circRNA in tumorigenesis. Moreover, due to its structural specificity and biological stability, circRNA is anticipated to be a potential biomarker for tumor diagnosis. Studies have confirmed that circRNA can participate in the proliferation, invasion, metastasis, and apoptosis of GC. These findings will lead to novel directions for the diagnosis and treatment of GC. This article reviews the structure and function of circRNA, summarizes the current studies on circRNA, and discusses the potential diagnostic value of circRNA in GC.

  • 标签: Circular RNA Gastric cancer Biomarker Diagnosis
  • 简介:在二维的空间R2的bivariate插值在一维的空间R是比那更复杂的,因为没有在R2的连续功能的Haar空间。因此,bivariate插值没为一套任意的不同pairwise点有一个唯一的答案。在这个工作,我们建议取决于点的基础的一种类型以便bivariate插值为不同pairwise点的任何集合有唯一的答案。在这种情况中,bivariate插值的矩阵把半继承因式分解。

  • 标签: 二元插值 SEMI 连续函数空间 一维空间 二维空间 基础类型
  • 简介:Circulareconomy(CE)hasbeenputforwardasanimportantenvironmentalandresourcestrategyinChina.Aimingatthehighutilizationrateofresourcesandreductionofpollutants,CEmeanstorealizeashiftoffundamentalparadigm.Withthemodeofproductionandconsumptionfromlineartorecyclingmodel,thepromotionrequirestransdisciplinaryresearcheswhichintegratetechnological,ecological,social-culturalandothersciences.Thepresentstudyfocusesontheimplementationofcirculareconomyfromaninstitutionalperspective.Institutionactsasacrucialfactorbyprovidingincentivesfortechnicalinnovation,leadinginvestmentorientationanddeterminingpolicyeffectiveness,etc.Thispapermainlydiscussesabout:firstly,thefeatureofinstitution,institutionalchangesandinstitutionalinnovationisarticulated,togetherwitheco-industrialparkstrategy,extendedproducer’sresponsibilityanddematerializationprincipleasinnovativeinstitutionalarrangements;secondly,aspolicyplaysgreatroleoninstitutionalchangingprocess,themechanismofpolicyimplementationisneededtoberelated;asaresult,coevolutionofinstitutionsandpoliciesisthuspresented;atlast,apilotattemptismadetofindoutsomeoperationalavenuesinaccomplishmentofCEthroughboththeoreticalandpracticalmethodology,specialresolutionsareputforwardaftersomeprojectingdifficultiesanddilem-masinChinaaredescribed.

  • 标签: 循环经济 可持续发展 制度改革 政策效力
  • 简介:Thispaperproposesacircularthresholdquantumsecretsharing(TQSS)schemewithpolarizedsinglephotons.Apolarizedsinglephotonsequencerunscircularlyamonganytormoreofnpartiesandanytormoreofnpartiescanreconstructthesecretkeywhentheycollaborate.Itshowsthatentanglementisnotnecessaryforquantumsecretsharing.Moreover,thetheoreticefficiencyisimprovedtoapproach100%asthesinglephotonscarryingthesecretkeyaredeterministicallyforwardedamonganytormoreofnparties,andeachphotoncancarryonebitofinformationwithoutquantumstorage.Thisprotocolisfeasiblewithcurrenttechnology.

  • 标签: 量子秘密共享 阀值量子秘密共享 量子安全 高频率多路通信
  • 简介:Itisdifficulttorealizethetransformationfromtradi-tionaleconomyindustrialsystemtocirculareconomyindustrialsystem.Regardingprimaryrawmaterialsastheindicators,theindustrialsystemhasbeenspecifiedaccordingtothedivergenceamongtheindicatorsandthecircularutilizationmodes.Incom-parisonwiththeassociationamongindustrialsystems,therela-tionshipamongindustrialsub-systemsisnamedasindustrialcross-linkinginthispaper.Theindustrialsystemwhichcouldcompletelyutilizeandrecycletheindicatorsshouldbeincreasedandstrengthened,andthecirculareconomyindustrialsystemwithcompleteindustrialassociationandindustrialcross-linkingshouldalsobeconstructed.Takingthedevelopmentofcircularagricul-turalsystembasingonthetraditionalagriculturalsystemasanexample,thetraditionalagriculturalproductsareregardedastheindicatorswhichhavebeendividedintofoodstuffandcropstrawswhichareusedtoproducefoodandarticlesforuse,likefertilizer,energyandpapersetc.Thewaytoconstructthecircularagricul-turalindustrialsystemistoincreasetheindustrialsystemsthatcouldutilizetheproductsgeneratedfromcropstraws,fecesandothercastoffsandtransformthewastewaterandothertrucksintoenvironmentalfriendlyproducts.Ithasalsobeenpointedoutthattheconstructionofcirculareconomyindustrialsystemiscondu-civetothefoundationofcircularindustrialeconomicsandtheestablishmentoftheconstructionlayoutofcirculareconomyandtheapplicationschemes.Suggestionstothetheoreticalandprac-ticalworkofthenextstephavealsobeenbroughtforwardinthispaper.

  • 标签: 循环经济 工业系统 工业结构 环境保护
  • 简介:Ecologicaleconomicsandsustainabledevelopmenteconomicsarethebasictheoriestoresearchoncirculareconomy.Throughthesystemicallyresearchontherelationshipofthethreeabove,thispaperthinksthatthereuseandrecycleofcirculareconomyisawaythatthestallismendedafterasheepislost.Althoughthereductiontechnicallycontrolstheproductionprocess,itcannotsolvethewastecausedbyblindproductionandexcesscompetition.Wehaveexperiencedvarietyobstacleswhenimplementingthecirculareconomy,whosemainreasonistheconflictbetweentheindividualrationandthesocialration.Therefore,onlywhentheindividualrationandsocialrationinclinetoconformity,thecooperatingNashequilibriumwillbeappeared.Inordertorealizetheharmonyofecology,economyandsociety,wehavetoexploreeffectiveevaluationtheory.Thispapercitesthe'fiveflowsofwealthoperationtheory'fromprofessorMaChuandongtosearchoperationmechanismofcirculareconomy,makesclearthedevelopingthoughtsofcirculareconomybasedontherealities,andbringsforwardsomecountermeasurestodevelopcirculareconomybasedontheabovetheoreticalanalysis.

  • 标签: 经济循环 机械化运作 五流合理操作 措施
  • 简介:Theanalysisofthedataofmodeltestsoftwolargedeepwharvesandmonographicexperimentalstudiesshowthattwoaspectsaretobeimprovedsoastopredictthewaveupliftforcesonthebottomofacircularcylinder.Thefirstaspectistheupliftpressuredistributiononthebottom,andthesecondisthecorrectdeterminationofthephaseformaximumhorizontalwaveforces.Thesecondproblemhasbeensolved.Synthesizingtheresultsoftheoreticalanalysisandexperiments,wesuggestadiagramforthedeterminationofthephasewhenthemaximumhorizontalwaveforceappears.Onthebasis-efthediagramthesimultaneouswaveupliftforcescanbeobtainedforthestructuralstabilityanalysis.

  • 标签: DIFFRACTION theory stability of circular cylinders
  • 简介:NUMERICAL SIMULATION OF DISCONTINUOUS FLOW IN CIRCULAR CONDUITSNUMERICALSIMULATIONOFDISCONTINUOUSFLOWINCIRCULARCONDUITS¥MaoZe...

  • 标签: numerical simulation DISCONTINUOUS flow MOVING BOUNDARY