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36 个结果
  • 简介:Thepseudoexcitationmethod(PEM)hasbeenimprovedintoamorepracticalform,onwhichtheanalyticformulaeofseismicresponsepowerspectraldensity(PSD)ofsimplifiedlarge-spanstructuralmodelshavebeenderived.TheanalyticformulaeandnumericalcomputingresultsofseismicresponsePSDhavebeenderivedtostudythemechanismofmulti-supportexcitationeffects,suchasthewave-passageeffectandincoherenceeffect,fortheseismicresponseofmultiandlarge-spanstructures.Byusingamulti-spantrussasanexample,theinfluenceofmulti-supportexcitationeffectsontheseismicresponseofsuchstructuresisstudied.

  • 标签: RANDOM SEISMIC RESPONSE multi-support EXCITATIONS
  • 简介:DNAcondensationisanimportantprocessinmanyfieldsincludinglifesciences,polymerphysics,andappliedtechnology.Inthenucleus,DNAiscondensedintochromosomes.Inpolymerphysics,DNAistreatedasasemi-flexiblemoleculeandapolyelectrolyte.Manyagents,includingmulti-valentcations,surfactants,andneutralpoorsolvents,cancauseDNAcondensation,alsoreferredtoascoil–globuletransition.Moreover,DNAcondensationhasbeenusedforextractionandgenedeliveryinappliedtechnology.ManyphysicaltheorieshavebeenpresentedtoelucidatethemechanismunderlyingDNAcondensation,includingthecounterioncorrelationtheory,theelectrostaticzippertheory,andthehydrationforcetheory.Recentlyseveralsingle-moleculestudieshavefocusedonDNAcondensation,sheddingnewlightonoldconcepts.Inthisdocument,themulti-fieldconceptsandtheoriesrelatedtoDNAcondensationareintroducedandclarifiedaswellastheadvancesandconsiderationsofsingle-moleculeDNAcondensationexperimentsareintroduced.

  • 标签: 脱氧核糖核酸 阳离子表面活性剂 场方法 高分子物理 缩合机理 DNA
  • 简介:Thehumancardiovascularsystemisaclosedloopandcomplexvascularnetworkwithmulti-scaledheterogeneoushemodynamicphenomena.Here,wegiveaselectivereviewofrecentprogressinmacro-hemodynamicmodeling,withafocusongeometricalmulti-scalemodelingofthevascularnetwork,micro-hemodynamicmodelingofmicrocirculation,aswellasbloodcellular,subcellular,endothelialbiomechanics,andtheirinteractionwitharterialvesselmechanics.Wedescribeindetailthemethodologyofhemodynamicmodelinganditspotentialapplicationsincardiovascularresearchandclinicalpractice.Inaddition,wepresentmajortopicsforfuturestudy:recentprogressofpatient-specifihemodynamicmodelinginclinicalapplications,micro-hemodynamicmodelingincapillariesandbloodcells,andtheimportanceandpotentialofthemulti-scalehemodynamicmodeling.

  • 标签: 血流动力学 心血管系统 多尺度建模 动力学模型 临床应用 多尺度模型
  • 简介:Themechanicalstructureaswellastheschematicorganizationhasbeendesignedtoachievelowerlimbrehabilitationtrainingfunction;Solidworkshasbeenusedtomodeltherobot.Andtherobothasbeenoptimizedbythemeansofhuman-interferenceengineering.TheprimarycomponentsoftherobothavebeenanalyzedbyAnsysworkbench.

  • 标签: 康复机器人 数字化设计 多功能 SolidWork WORKBENCH ANSYS
  • 简介:Atheoreticalinvestigationiscarriedouttostudytheexistence,formationandbasicpropertiesofionacoustic(IA)doublelayers(DLs)inamagnetizedbi-ionplasmaconsistingofwarm/coldionsandBoltzmanndistributedelectrons.Basedonthereductiveperturbationtechnique,anextendedKortewegde-Vries(KdV)equationisderived.Thepropagationoftwopossiblemodes(fastandslow),andtheirevolutionareinvestigated.Theeffectsofobhqueness,magnitudeofthemagneticfield,ionconcentration,polarityofions,andiontemperatureontheIADLprofileareanalyzed,andthentherangesofparametersforwhichtheIADLsexistareinvestigatedindetails.

  • 标签: ION ACOUSTIC WAVES bi-ion PLASMA DOUBLE-LAYERS
  • 简介:Inthispaper,wederivethebi-Hamiltonianstructureofamulti-componentCamassa–Holmsystem,whichassociateswiththemulti-componentAKNShierarchyandmulti-componentKNhierarchyviathetri-Hamiltoniandualitymethod.Furthermore,thespectralproblemsofthedualhierarchiesmaybeobtained.

  • 标签: bi-Hamiltonian STRUCTURE DUAL HIERARCHIES Camasssa
  • 简介:Thisarticlepresentsanovelimageinterpolationbasedonrationalfractalfunction.Therationalfunctionhasasimpleandexplicitexpression.Atthesametime,thefractalinterpolationsurfacecanbedefinedbyproperparameters.Inthispaper,weusedthemethodof‘coveringblanket’combinedwithmulti-scaleanalysis;thethresholdisselectedbasedonthemulti-scaleanalysis.Selectingdifferentparametersintherationalfunctionmodel,thetextureregionsandsmoothregionsareinterpolatedbyrationalfractalinterpolationandrationalinterpolationrespectively.Experimentalresultsonbenchmarktestimagesdemonstratethattheproposedmethodachievesverycompetitiveperformancecomparedwiththestate-of-the-artinterpolationalgorithms,especiallyinimagedetailsandtexturefeatures.

  • 标签: 图像插值 多尺度分形维数 有理函数模型 多尺度分析 纹理特征 分形函数
  • 简介:Accordingtothestudyonseat-backcurvesaboutdifferentpeople,themethodthatusingtwoarc-shapedroofstogivebacksupportingforceofthehumanbodyisproposed.Throughacleverdesignapplicationofpiezoelectricsensor,microcontroller,motors,andarc-shapedroofsformaclosedloopcontrolsystem.Throughthedesignofhorizontalandverticaladjustmentmechanism,aflexibleandadaptivemulti-dimensionalbackcanreducetheharmtohumanspinewhichcausedbypoorpostureandsedentarylifestyle.ModelbuildingandstressanalysisaredonebyInventorsoftwaretoverifythemechanismofstrength.

  • 标签: 人机工程学 自适应 闭环控制系统 压电传感器 调节机制 生活方式
  • 简介:Theestablishmentofaglobalmulti-regionalcarbonmarketisconsideredtobeacosteffectiveapproachtofacilitateglobalemissionabatementandhasbeenwidelyconcerned.TheongoingplannedlinkagebetweentheEuropeanUnion’scarbonmarketandanewemissiontradingsysteminAustraliain2015wouldbeanimportantattempttothepracticeofbuildingupaninternationalcarbonmarketacrossdifferentregions.Tounderstandtheabatementeffectofsuchaglobalcarbonmarketandtostudyitsenergyandeconomicimpactondifferentmarketparticipants,thisarticleadoptsaglobaldynamiccomputablegeneralequilibriummodelwithadetailedrepresentationoftheinteractionsbetweenenergyandeconomicsystems.Ourmodelincludes20economicsectorsand19regions,anddescribesindetail17energytechnologies.Bundledwithfossilfuelconsumptions,theemissionpermitsareconsideredtobeessentialinputsineachoftheproductionandconsumptionactivitiesintheeconomicsystemtosimulateglobalcarbonmarketpolicies.Carbonemissionpermitsareendogenouslysetinthemodel,andcanbetradedbetweensectorsandregions.Consideringthecurrentdevelopmentoftheglobalcarbonmarket,thisstudytakes2020asthestudyperiod.Fourscenarios(referencescenario,independentcarbonmarketscenario,EuropeUnion(EUh-Australiascenario,andChina-EU-Australiascenario)aredesignedtoevaluatetheimpactoftheglobalcarbonmarketinvolvingChina,theEU,andAustralia.Wefindthatthecarbonpriceinthethreecountriesvariesalot,from$32/tCO2inAustralia,to$17.5/tCO2intheEU,andto$10/tCO2inChina.Thoughtherelativeemissionreduction(3%)inChinaislowerthanthatintheEU(9%)andAustralia(18%),theabsoluteemissionreductioninChinaisfargreaterthanthatintheEUandAustralia.WhenChinaisincludedinthecarbonmarket,whichalreadyincludestheEUandAustralia,theprevailingglobalcarbonpricefallsfrom$22pertoncarbondioxide(CO2

  • 标签: EMISSIONS TRADING system GLOBAL CARBON MARKET
  • 简介:Inthispaper,theerenkovradiationoflightpulseinamicroringandgratingsissimulatedandinvestigated.Thesystemdesignconsistsofatwo-defectgratingincorporatingamicroring,connectedwithauniformgrating.Insimulation,thecontinuouswave(CW)lightpulsewithwavelengthcenteredat1.55μmisinputintothemicroringdeviceviathetwo-defectgrating.Theresonantoutputsfromthetwo-defectgratingpropagatethroughthemicroringanduniformgrating,wherethetimedelaysofthosetwoinputpulseswithdifferentwavelengthsthroughthesystemaredistinguishedbytheoutputuniformgrating.Fromtheobtainedresonantoutputpulses,wefindthatthered-shiftedandblue-shiftederenkovpulsesareobserved.Inapplications,suchaproposedsystemcanbeusedtoformtwodifferentopticaldelaypulses,inwhichthechangeinerenkovradiationofthem,i.e.,timedelaywithinamicroringdevicesystem,canbeusefulforerenkovradiationimagingandsensingapplications.

  • 标签: 切伦科夫辐射 谐振器 多波长 光栅 微环 输出脉冲
  • 简介:Flocculationtimeisconventionallybelievedtobeproportionaltotheflocculationefficiencyofacylindricalfluidizedbedflocculator.However,inasingle-stagevelocitygradientsituation,theflocculationefficiencydecreaseswhentheoptimalflocculationtimeisexceeded.Amulti-stagevelocitygradientwasestablishedinacylindricalfluidizedbedflocculator,basedonthehydraulicclassificationtheory.Thismulti-stagevelocitygradientfluidizedbedflocculator(MGF)createdamoresuitableenvironmentforflocgrowthandprotection,whichwasconfirmedbythesizedistributionofflocsalongthebedheight.Correspondingly,theabatementefficienciesforKaolinslurryanddyedwastewatertreatmentintheMGFwereenhancedby5-10%,andby7-20%,respectively,comparedwiththoseinthesingle-stagevelocitygradientfluidizedbedflocculators(SGFs).TheinitialbedheightdistributionratioalongthevelocitygradientswasanimportantfactorforMGFoptimization.

  • 标签: 絮凝时间 速度梯度 流化床 多级 优化 圆筒形
  • 简介:直角的多匹配的追求(OMMP)是直角的匹配追求(OMP)的自然扩展.We作为M1是一个整数的OMMP(M)与参数M表示OMMP。OMP和OMMP(M)之间的主要差别是OMMP(M)每重复选择M原子,当OMP仅仅把一个原子加到最佳的原子集合时。在这份报纸,我们学习直角的多匹配的追求的表演在下面裂开。特别地,我们看那测量矩阵A是否满足(25年代,1/10)有12能恢复的M0=的-RIP,OMMP(M0)在s重复以内的s稀少的信号。我们而且证明OMMP(M)能为M的一个大班在O(s/M)重复以内恢复s稀少的信号。[从作者抽象]

  • 标签: 正交 性能 等距 迭代方法 匹配追踪 OMP
  • 简介:Usingbi-spinorfieldswewritethepseudo-scalarandbi-spinorfieldsthatarecharacterizedbythefieldfunctionsofcoordinatesofseveralparticles,namelymulti-particlefields.Byapplyingthequantizationproceduretothesemulti-particlefields,hadroniccreationandannihilationoperatorshavebeenobtained.

  • 标签: MULTI-PARTICLE FIELD OPERATORS
  • 简介:我们在场与多重奇特测量光旋涡的拓扑的费用的一个简单方法。用一个圆柱的透镜,一根旋涡横梁能与多重分开的黑暗的洞腐烂进轻地分布,谁的数,就等于输入横梁的拓扑的费用。这个结论然后与多重奇特经由实验和旋涡横梁的繁殖的数字模拟被验证。这个方法也是可靠的与奇特的不同分布测量宽带旋涡横梁的拓扑的费用,它不诉诸多重横梁interferometric实验。

  • 标签: 柱面透镜 拓扑荷 旋涡 光学 测量 奇异
  • 简介:城市的总线网络的多客观的优化能帮助改进运输系统的操作效率并且为在中国减少城市的交通拥挤开发策略。工作使用了累积前景理论,当前为在无常下面的决定的最有影响的模型,优化城市的公共汽车网络。完成研究目的,工作开发了城市的总线网络优化,包括的优化原则,优化目的和限制的理论框架。而且,优化目的能包括地从时间,空间和价值的尺寸反映旅客和总线公司的期望。它在以前的研究独自与仅仅一个股东或尺寸相比更科学、合理。另外,为由到理想的答案TOPSIS的类似的顺序偏爱的技术被用来决定积极、否定的理想的选择。在优化选择和理想的选择之间的关联被灰关系分析同时估计。累积前景理论CPT被用来由比较每种选择的全面前景价值决定最好的选择,精确地在实际生活与期望的用途理论相比描述决策行为。最后,Xian的大小写证明方法能更好调整总线网络,并且优化解决方案是更合理的满足实际需要。

  • 标签: 多目标优化 城市公交 公交网络 累积 逼近理想解 TOPSIS
  • 简介:Weproposeatwin-arraycapacitance(TAC)sensorforthemeasurementofconcentration,velocity,andflowrateofgas-solidtwo-phaseflow.Usingthesensitivitynon-uniformityofaneighboringelectrode,theregionalconcentrationofthecross-sectionwasreconstructeddirectly.Additionally,thefiniteelementmethodwasusedtoanalyzethecapacitanceofthesensorscomposedofadifferentnumberofelectrodes.TACsensorswith4,6,and8electrodeswerefoundtobethebestforregionalconcentrationmeasurements.Basedonthis,the8-electrodetwin-planeelectricalcapacitancetomography(ECT)sensor,the4-electrodeTACsensor,andthe6-electrodeTACsensorwereusedtomeasuretheconcentration,velocity,andflowrateofgranulesingranularflow.TheflowratesmeasuredbyECTandTACwerecomparedwiththeflowrateobtainedbyagravitysensortoverifythemeasurementaccuracy.Experimentsonverticalandinclinedpipelineswithgranularflowwerecarriedout.Wefoundthattheflowrateaccuracyofthe4-electrodeTACisdistinctlybetterthanthatofthe6-electrodeTACintheverticalpipelinewhiletheflowrateaccuracyofthe4-electrodeTACandthe6-electrodeTACweresimilarfortheinclinedpipeline.

  • 标签: 电容传感器 多参数测量 阵列 多相流 电极传感器 流量精度
  • 简介:在现在的纸,在有弹性的媒介嵌入的多围的碳nanotubes(MWCNT)的动态稳定性包括热环境效果被调查。到这个目的,一个非局部的Timoshenko横梁模型被开发它捕获小规模效果。碳nanotubes的动态管理方程包括轴的压缩力量的效果基于Timoshenko横梁理论被提出。然后,参量的研究被进行与简单地支持的结束支持在MWCNT的动态稳定性特征上调查静态的负担因素,温度变化,非局部的参数,苗条比率和有弹性的媒介的春天常数的影响。

  • 标签: 下线 服务 迁移
  • 简介:地震照明在表面下的成像起一个重要作用。一幅更好的图象也能通过优化获得几何学或介绍包含照明赔偿的更先进的地震移植或tomographic倒置方法被期望。垂直电报调查是为它的灵活性和数据质量的传统的海洋的地震调查的潜在的代替。处理的常规垂直电缆线数据在移植前要求primaries和multiples的分离。我们建议使用多尺度的完整的波形倒置(FWI)改进垂直电报调查的照明范围。一个深水速度模型被造在在海床下面检测低速度异例测试多尺度的FWI的能力。合成结果证明多尺度的FWI是在深海的探索的一个有效模型大楼工具。通过面向的照明分析和多尺度的FWI可以帮助减轻垂直电报调查的风险的目标的几何学优化。多尺度的FWI,低频率的数据和multi-vertical-cable获得系统的联合可以提供高分辨率和高保真度表面下的模型。

  • 标签: 垂直电缆 反演方法 波形反演 多尺度 海上地震勘探 海洋