学科分类
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500 个结果
  • 简介:我们学习肿瘤房间生长的动力学,推迟时间的反馈在一个不均匀的双稳态的潜力由趋于增加的噪音开车很好。在一小延期时间,概率分发和第一经过时间的分析答案显示出那,与增加的延期时间,处于一个更低的人口状态的概率分发的山峰将增加,但是在一张更高的人口声明它减少。趋于增加的噪音和时间延期在肿瘤细胞生长在角色对面玩,这被显示出。

  • 标签: 延迟时间 肿瘤生长 延迟反馈 随机 乘性噪声 状态概率
  • 简介:Thequantumvibrationalenergy-spectraincludinghighexcitedstatesoftheproteinmoleculeshavebeencalculatedbynewtheoryofbio-energytransportalongtheproteinmoleculesanditsdynamicequation,discretenonlinearSchrodingerequation,appropriatetotheproteinmoleculesonthebasisofthelevelofmolecularstructure.Thisenergy-spectraobtainedarebasicallyconsistentwiththeexperimentalvaluesbyinfraredabsorptionandradiatedmeasurementofperson'shandsandlaser-RamanspectrumfrommetabolicallyactiveE.Coli..Fromthisenergy-spectraweknowthattheinfraredlightswith(1-3)x1000nmand(5-7)x1000nmwavelengthcanbeabsorbedbytheproteinmoleculesinthelivingsystems.Inaccordancewiththenon-lineartheoryofthebio-energytransportweknowthattheenergyoftheinfraredlightabsorbedbytheproteinscanresultinvibrationsofamide-Iinaminoacidsandcanfacilitatethebio-energytransportalongtheproteinmolecularchainsfromoneplacetootherforthegrowthoflivingbodies.Thisprocesseisnon-thermal.Thisisjustnon-thermaleffectoftheinfraredlights.Accordingtothemechanismweexplainedfurtherthemedicalfunctionsoftheinfraredlightsabsorbed.

  • 标签: INFRARED light BIO-ENERGY transport energy-spectra NON-THERMAL
  • 简介:Theformulaeusedtocalculatethefrictioninthenon-uniformflowchutewereexaminedwiththeexperimentaldata,andtheresultsshowthattheaccuracyoftheformulaisenoughforengineeringapplications.Acomparisonbetweentheresultsoffrictionrespectivelyfromtheuniformflowassumptionandthenon-uniformflowapproximationindicatesthattheformerisanorderofmagnitudelargerthanthelatterinthecaseofsteepchute.Thehydraulicdragonasteepchutewithaeratorswasmeasuredonthehydraulicmodeldirectlyandthecoefficientoftheaeratoreffectonthedragwasobtained.Thevariationpatternsofthewallshearjustdownstreamoftheaeratorswereinvestigatedandthemechanismoftheincreaseinthedragbyaeratorwereanalyzedqualitativelywiththemeasuredwater-depthsjustdownstreamtheaerators.

  • 标签: 溢流槽 壁剪应力 水力阻力 摩擦实验 计算公式
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  • 简介:ProblemsofChinaBuilding&SanitaryCeramicsindustrialclusters,Currentstatusanddevelopmentofbuildingceramicsindustryathomeandabroad,TheformationanddevelopmentofJiajiang'sbuildingceramicsindustrialclusters,Resourceismomentumforindustrialclusters'development

  • 标签: 中国 建筑卫生陶瓷 工业群效应 工业发展
  • 简介:GravitationaleffectofwatercirculationinthenorthwestYunnanMin-YuJIA;(贾民育)Shao-AnSUN;(孙少安)Ai-MinXIANG;(项爱民)andDong-ZhiLIU(刘冬至)(...

  • 标签: EARTHQUAKE prediction test SITE GRAVITATIONAL EFFECT
  • 简介:Astudyonthetransportcharacteristicsofzincinlousoilwithphosphateatdifferentconcentrationswascarriedoutbythemethodofstepinput.Theeffectsofphosphateandtemperatureonzinctransportwerestudiedthroughanalysingthediffusion-dipsersioncoefficients(D)andtheretardationfactor(R)obtainedbytheprogramCXTFIT.TheresultsshowedthatDdecreasedandRincreasedwithincreasigconcentrationofphosphatesothativwasdifficultforzinctobreakthroughthesoilcolumn,andzincstoppedtobreakthroughthecolumnathightemperature.Oneorderequation,doubleconstantequationandtheElovichequationwereallsuitablefortheescriptionofzincdynamics.Effectsofphosphateandtemperatureonzinctransportwerefurtherconfirmedbytheanalysisonpseudo-thermodynamicparametersofzinctransport.

  • 标签: 扩散系数 磷酸盐 伪热力学参数 延迟因素 运移动力学
  • 简介:明显的antiplasticizing效果与MOCA的小数量在PVC被观察了,3,3-dichloro-4,4-diamino-diphenylmethane。PVC/MOCA混合的PVC-MOCA相互作用和结晶化行为详细被调查包括直接存储器存取,FTIR,和DSC根据一系列技术解释antiplasticization的机制。有MOCA的5phr的PVC的张力的力量到达的机械性质测试表演的结果最大的价值,69.5Mpa,它比纯PVC的高是大约23%。在张力的力量的上升在由直接存储器存取大小证实了的PVC上被归因于MOCA的antiplasticizing效果。从FTIR的证据表明一个强壮的结合氢的相互作用在MOCA和PVC重复单位的methine质子发生在-NH2组的氮原子之间。DSC分析的结果显示MOCA的那结晶化行为完全被压制,PVC的crystallinity随MOCA数量的增加减少。

  • 标签: 聚氯乙烯 艺术馆 二氨基二苯甲烷 DSC分析 力学性能测试 氢键相互作用
  • 简介:这篇文章在优秀通货膨胀的存在下面与消费者参考质量效果学习联合定价和动态产品质量投资的一个问题。最佳的控制模型被构造与一个有限优秀投资能力最大化全部的利润,在需求对历史的产品质量水平敏感的地方。为有限、无限的计划地平线的最佳的优秀投资策略被根据Pontryagins最大的原则解决这些最佳的控制模型分别地给,它随着时间的过去与引用质量效果使最佳的优秀投资的准确轨道能被描绘。另外,一个有效算法被设计为系统产生最佳的联合定价和动态优秀投资政策。有限计划地平线和无限的计划地平线的策略之间的主要差别是后者是一个常数。我们的学习显示公司在整个计划地平线一路上增加优秀投资从来不是最佳的。当考虑参考质量的影响时,优秀投资的水平更高。而且,数字例子被给说明理论结果的正当。另外,敏感分析被执行显示出系统参数怎么影响最佳的政策,并且一些经理的建议被介绍。

  • 标签: 质量效应 质量改进 最优控制模型 敏感性分析 有限规划 价格
  • 简介:BacterialwiltcausedbyPseudomonassolanacearum,isaveryseriousdiseaseofEucalyptusinsouthernChina,mainlyinGuangdong,HainanandGuangxiprovinces.Itcausesthedeathofseedlingsandyoungtreesandthemortalitymayexceed90percentinsomesites.SusceptiblespeciesincludeE.grandis,E.urophylla,hybridsbetweenthetwoandE.citriodora.InnurseryandfieldtrialswithE.urophyllaandfieldtrialwithE.grandisxE.urophyllainoculationofectomycorrhizalfungiwasfoundtored...

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  • 简介:Theobjectiveofthisresearchistodeterminetheeffectearthquakeshaveontheperformanceoftransportationnetworksystems.Todothis,bridgefragilitycurves,expressedasafunctionofpeakgroundacceleration(PGA)andpeakgroundvelocity(PGV),weredeveloped.Networkdamagewasevaluatedunderthe1994Northridgeearthquakeandscenarioearthquakes.Aprobabilisticmodelwasdevelopedtodeterminetheeffectofrepairofbridgedamageontheimprovementofthenetworkperformanceasdayspassedaftertheevent.Asanexample,thesystemperformancedegradationmeasuredintermsofanindex,"DriversDelay,"iscalculatedfortheLosAngelesareatransportationsystem,andlossesduetoDriversDelaywithandwithoutretrofitwereestimated.

  • 标签: FRAGILITY CURVES seismic RETROFIT PROBABILISTIC model
  • 简介:TransparentYAG(yttriumaluminumgarnet)ceramicswerefabricatedbysolid-statereactionmethod.Effectofadditive(tetraethylorthosilicate,TEOS)onmicrostructureofYAGceramicswasinvestigated.IftheadditionofTEOSismorethan3%(massfraction),largeamountofliquidphasecanbeyieldedatgrainboundaries,resultingintheformationofsecondphaseparticlesatgrainboundaries.Iftheadditionislessthan0.05%(massfraction),poresareentrappedinthegrains.Thesuitableamountis0.5%(massfraction).AfullytransparentYAGceramicwasfabricatedbyvacuumsinteringat1700℃for5h.OpticaltransmittanceoftheYAGceramicis63%inthevisiblelightwavelengthsand70%intheinfraredwavelengths.

  • 标签: 无机材料 YAG 透明陶瓷 稀土 光学陶瓷
  • 简介:目的:观察针刺治疗黄褐斑的疗效。方法:将90例患者随机分为治疗组和对照组,每组各45例。其中,治疗组又辨证分成3型,予针刺治疗。对照组予维生素C和维生素E治疗。结果:治疗组和对照组有效率分别为93.3%和73.3%(P<0.05),而治疗组内各型疗效无差异(P>0.05)。结论:针刺治疗各型黄竭斑均有明显的效果。

  • 标签: 针刺疗法 黄褐斑 治疗 临床资料 色素沉着异常 辨证分型
  • 简介:Inthepresentwork,aparametricnumericalstudyisconductedinordertoassesstheeffectofairfoilcamberingontheaerodynamicperformanceofrigidheavingairfoils.TheincompressibleNavier-Stokesequationsaresolvedintheirvelocity-pressureformulationusingasecond-orderaccurateinspaceandtimefinite-differencescheme.Totackletheproblemofmovingboundaries,thegoverningequationsaresolvedonoverlappingstructuredgrids.ThenumericalsimulationsareperformedataReynoldsnumberofRe=1100andatdifferentvaluesofStrouhalnumberandreducedfrequency.Theresultsobtainedshowthattheairfoilcamberinggeometricparameterhasastronginfluenceontheaverageliftcoefficient,whileithasasmallerimpactontheaveragethrustcoefficientandpropulsiveefficiencyofheavingairfoils.

  • 标签: heaving AIRFOILS STRUCTURED OVERLAPPING grids INCOMPRESSIBLE
  • 简介:—Inthispaper,anonlinearmodelispresentedtodescribewavetransformationinshallowwat-erwiththezero-vorticityequationofwave-numbervectorandenergyconservationequation.Thenonlineareffectduetoanempiricaldispersionrelation(byHedges)iscomparedwiththatofDalrymple'sdispersionrelation.Themodelistestedagainstthelaboratorymeasurementsforthecaseofasubmergedellipticalshoalonaslopebeach,wherebothrefractionanddiffractionaresignificant.Thecomputationre-sults,comparedwiththoseobtainedthroughlineardispersionrelation.showthatthenonlineareffectofwavetransformationinshallowwaterisimportant.Andtheempiricaldispersionrelationissuitableforre-searchingthenonlinearityofwaveinshallowwater.

  • 标签: wave propagation: SHALLOW water non/inearity REFRACTION
  • 简介:Objective:Toevaluatetheassociationbetweenobesityandtheriskofcolorectalcancer.Methods:331patientswithrectalcancerand175withcoloncancerwhoacceptedsurgicaloperationatBeijingCancerHospitalduring1995and2002wereenrolled.Datawerecollectedbyreviewingthepathologymaterialsandhospitalrecords.258healthypeoplewhoacceptedhealthexaminationatBeijingCancerHospitalduring2000and2002werealsoenrolledascontrol.Dataofheight,weightandgenderatthetimeofexaminationwerealsocollected.Obesitywasestimatedbybodymassindex(BMI),computedasweightinkilogramsdividedbyheightinmeterssquared(kg/m2).ThedegreeofobesitywascomparedbetweenthetwogroupsusingBMI(18.5,24-27.9and(28(kg/m2)asthecut-offpointsforunderweight,overweightandobesity.Associationswithobesitywereestimatedbyoddsratios(ORs)and95%confidenceintervals(CIs).AllORswereadjustedforageandsex.Results:Obesitywassignificantlyprevalentinfemalepatientswithrectalcancer.AllthepatientswithcoloncancershowedlowerlevelofBMIthancontrolsubjects.TheORsforrectalcancerrosewithincreasingBMIinwomen.Meanwhile,theORsforcoloncancerdroppedwithincreasingBMIinbothmenandwomen.Obesitywasanindependentriskfactorforrectalcancer,butnotanindependentriskfactorforcoloncancer.Conclusion:Rectalcancerandcoloncancermayhavedifferentbiologicalbehavior.Obesewomenhaverelativelyhighriskforrectalcancer.

  • 标签: 结肠癌 直肠癌 外科治疗 肥胖 相关性
  • 简介:AFokker-Planckstudyiscarriedoutfortokamaklowerhybridcurrentdrivewithconsideringthewavesentoftrappingabsorptioninthepreeffectsituation.ThisFokker-PlanckcodeisdevelopedbasedonFASTFP,andsuitableforvariousauxiliaryheatingandcurrentdrivesituationsTheenergylossmechanismthroughanomaloustransportismodeledbyusingasuitablelosstenn.Intheheatingphase,theelectrondistributiondeviatesfromtheMaxwellianclearly,

  • 标签: 捕获电子效应 低杂波电流驱动 磁约束聚变装置 剖面控制 FOKKER-PLANCK方程