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125 个结果
  • 简介:稳定河槽几何学在相当很长时间吸引了水力的工程师的注意。各种各样的标准被建议了解释一条隧道的自我形成的几何学。基于流动系统,和使用的几何编程的最佳的费用结构,现在的调查提出客观功能产出Lacey的稳定河槽尺寸。功能可能是有用的披露稳定河槽几何学的许多详情。

  • 标签: ALLUVIAL STREAMS CANALS GEOMETRIC programming River
  • 简介:Chinaisacountrywiththemostneighboringcountriesintheworld.China'slandborderstotalmorethan22,000kilometersinlength;itsmainlandcoastlinestretchesforsome18,000kilometers;anditsharescommonborderswith14countries.Includingcountriesseparatedbystretchesofsea,Chinahas

  • 标签: 周边环境 稳定 社会制度 中国 海岸线 邻国
  • 简介:让的p7是一个奇怪的素数。基于Toda托架11p1,11,p,作者显示出的s,关系11p1h2,0s=p/p111ph2,0s=0*S为2sp的02,尽管1h2,0s并且11h1p11h2,03是重要的在*S0并且推测那1p11h2,0s是重要的在p/p1

  • 标签: 稳定同伦群 DELTA 奇素数 ph2 BP PI
  • 简介:包含perfluorooctyl一半的基于Fluorene的聚合物被设计并且综合。高electronegativity和FH-C相互作用在氟化的聚合物是在场的,它稍微导致在电影的紫外力的吸收蓝移动。从氟化的溶剂准备的含氟聚合物电影比在非氟化的溶剂准备的那些显示出lager接触角度。

  • 标签: 含氟聚合物 超疏水 聚合物薄膜 聚芴 稳定 UV-VIS
  • 简介:这篇文章的目的是在Morita类型的稳定的等价下面学习联合代数学的某invariants。首先,我们证明如果二有限维的self-injectivek代数学Morita类型是稳定地相等的,那么,他们的轨道代数学是同形的。第二,代数学的quasitilted性质在Morita类型的稳定的等价下面是不变的,这被验证。作为这结果的应用,如果代数学具有有限表示类型,那么,它的倾斜的性质在Morita类型的稳定的等价下面是不变的,这被获得;到部分倾斜的模块的另外的申请在节4被给。最后,我们证明当二有限维的k代数学Morita类型是稳定地相等的时,他们的重复代数学在某些条件下面的Morita类型也是稳定地相等的。

  • 标签: 稳定等价 关联代数 变性 应用程序 K-代数 K-代数
  • 简介:敏感的二种类型为静态地稳定的sailcrafts被建议。一种类型是关于质量的中心的位置的solar-radiation-pressure力量的敏感,并且另外的类型是关于态度的solar-radiation-pressure力量的敏感。敏感的二种类型代表solar-radiation-pressure力量怎么随着集体中心和态度的位置变化。有更大的敏感的Sailcrafts经历solar-radiation-pressure力量的更大的错误,导致更大的轨道错误,,由模拟示威了。然后作为案例研究,详细公式被导出与四张三角形的风帆为sailcrafts计算敏感。根据这些公式,敏感打字以便减少两个,在反对风帆之间的角度不应该太大,并且质量的中心应该远是离四张风帆并且尽可能的对称的轴尽可能靠近的离开sailcraft的压力的中心。

  • 标签: 敏感性分析 静态稳定 类型 辐射压力 重心位置 公式推导
  • 简介:Watersolubleconductingpolyanilinewithelectricalconductivityof10-1-10-2S/cmwaspreparedemployingdopantinducedwatersolubilitytechnology.Thewaterresistanceoftheconductingfilmwassignificantlyimprovedemployingsol-gelhybridsmethod,especiallywhentheconductivepolyanilineloadingwasbelow30wt%.Thereasonfortheimprovementisthattheconductingpolyanilinechainsareconfinedinastableinorganicnetwork.

  • 标签: 聚苯胺 溶胶-凝胶混合 无机网络 防水性 稳定性
  • 简介:<正>Thispaperconstructsanewfamilyinthestablehomotopyofspheresπt-SrepresentedbyhngoY3∈E26(,t)intheAdamsspctralsequencewhichrevisitsthebn-1goY3-elements∈π-7Scon-structcedin[3].wheret=2p11(p-1)+6(p2+p+1)(p-1)andp≥7isaprime.11≥4

  • 标签: STABLE HOMOTOPY of SPHERES ADAMS spectral
  • 简介:Objective:ToconstructsurvivinshRNAexpressionvectorcartingenhancedgreenfluorescentproteingene,transfectitintoGBC-SDHcellsviaelectroporation,andgetGBC-SDcellswhicharestableexpressingsurvivinshRNA.Methods:ThesiRNAsequencetargetingsurvivinmRNAwassynthesizedandclonedintopEGFP-H1.TheconstructedplasmidandpEGFP-H1weretransfectedintoGBC-SDcellsrespectivelyvialiposome,andthetransfectingeffectwasdetectedwithFlowCytometry.ThenthetransfectedcellswereselectedwithG418.Results:Therecombinantplasmidwassuccessfullyconstructed,namedpEGFP-survivin.ThegenetransfectionefficienciesinpEGFP-H1-transfectedgroupandpEGFP-survivin-transfectedgroupwerethe80.29%±2.71%and83.85%±2.34%(P>0.05),whichwassuccessfultogetthecellsthatarestableexpressingshRNA,namedGBC-SD/EGFPandGBC-SD/survivin.Conclusion:SurvivinshRNAexpressionvectorwasconstructedsuccessfullyandgotGBC-SDcellswhicharestableexpressionshRNA.

  • 标签: SURVIVIN基因 SHRNA 稳定表达 表达载体 增强型绿色荧光蛋白基因 SURVIVIN
  • 简介:Inthispaper,wepresentatechniqueforensuringthestabilityofalargeclassofadaptivelycontrolledsystems.WecombineIQCmodelsofboththecontrolledsystemandthecontrollerwithamethodoffilteringcontrolparameterupdatestoensurestablebehaviorofthecontrolledsystemunderadaptationofthecontroller.Wepresentaspecificapplicationtoasystemthatusesrecurrentneuralnetworksadaptedviareinforcementlearningtechniques.Theworkpresentedextendsearlierworksonstablereinforce...

  • 标签: 稳定性分析 不可分的二次的限制 周期性的神经网络 加强学习 线性矩阵不平等
  • 简介:Thephotochemicalpropertiesofpolypropylviologen(PPrV)-cationexchangeableresincomplexeswerestudies.Thecolorofthesecomplexeschangedtobluewhenirradiatedbyamercurylamp.UVandESRstudiesindicatedthatanefficientviologenradicalaccumulationoccursinPPrV-resincomplexes.Anexplanationforthestablephotoinducedredicalaccumulationisproposed.

  • 标签: 光化学 稳定光诱导自由基积累 PPrV-阳离子交换树脂络合物
  • 简介:Elmannetworks'dynamicalmodelingcapabilityisdiscussedinthispaperfirstly.AccordingtoElmannetworks'uniquestructure,aweighttrainingalgorithmisdesignedandanonlinearadaptivecontrollerisconstructed.WithoutthePEpresumption,neuralnetworkscontroller'sclosed-looppropertiesarestudiedandthewholeElmannetworks'passivityisdemonstrated.

  • 标签: ELMAN网络 动力学模型 非线性控制系统 神经网络
  • 简介:Ananomalousisotopeeffectexistsinmanyheavyelementisotopesystems(e.g.,Sr,Gd,Zn,U).Thiseffectusedtobecalledthe‘‘odd–evenisotopeeffect’’becausetheoddmassnumberisotopesbehavedifferentlyfromtheevenmassnumberisotopes.Thismass-independentisotopefractionationdrivingforce,whichoriginatesfromthedifferenceintheground-stateelectronicenergiescausedbydifferencesinnuclearsizeandshape,iscurrentlydenotedasthenuclearfieldshifteffect(NFSE).ItisfoundthattheNFSEcandriveisotopefractionationofsomeheavyelements(e.g.,Hg,Tl,U)toanastonishingdegree,farmorethanthemagnitudecausedbytheconventionalmass-dependenteffect(MDE).Forlightelements,theMDEisthedominantfactorinisotopefractionation,whiletheNFSEisneglectable.Furthermore,theMDEandtheNFSEbothdecreaseastemperaturesincrease,thoughatdifferentrates.TheMDEdecreasesrapidlywithafactorof1/T2,whiletheNFSEdecreasesslowlywithafactorof1/T.Asaresult,evenathightemperatures,theNFSEisstillsignificantformanyheavyelementisotopesystems.Inthisreviewpaper,webeginwithanintroductionofthebasicconceptoftheNSFE,includingitshistoryandrecentprogress,andfollowwiththepotentialimplicationsoftheinclusionoftheNFSEintothekineticisotopefractionationeffect(KIE)andheavyisotopegeochronology.

  • 标签: 同位素分馏效应 同位素效应 稳定 位移 同位素年代学 重金属元素
  • 简介:LetAandBbeC^*-algebras,SupposethatKisthealgebraofallcompactoperatoraonaseperableHilbertspace,andαisanactiononthestablealgebraκ×AinducedbySU(∞).ItisprovedthatifAisα-invariantstableisomorphictoB1thenthereisa^*-isomorphismbetweenAandB.AnanalogousresultisobtainedbyconsideringOn×κ×Aintheplaceofκ×A,whereOnistheCuntsalgebra(3≤n<∞)。

  • 标签: 稳定代数 昆兹代数 不变量 群序列
  • 简介:Stableisotopesofmostimportantbiologicalelements,suchasC,H,NandO,affectlivingorganisms.Inrapidlygrowingspecies,deuteriumandtoalesserextentotherheavyisotopesreducethegrowthrate.Atleastfordeuteriumitisknownthatitsdepletionalsonegativelyimpactsthespeedofbiologicalprocesses.Asarule,livingorganisms'resist'changesintheirisotopicenvironment,preferringnaturalisotopicabundances.Thispreferencecouldbeduetoevolutionaryoptimization;anadditionaleffectcouldbeduetothepresenceofthe'isotopicreso-nance'.Theisotopicresonancephenomenonhasbeenlinkedtothechoiceofearliestaminoacids,andthusaffectedtheevolutionofgeneticcode.Totesttheisotopicresonancehypothesis,literaturedatawereanalyzedagainstquantitativeandqualitativepredictionsofthehypothesis.Fourstudiesprovidedfiveindependentdatasets,eachinverygoodquantitativeagreementwiththepredictions.Thus,theisotopicresonancehypothesisisnolongersimplyplausible;itcannowbedeemedlikely.Additionaltestingisneeded,however,beforefullacceptanceofthishypothesis.

  • 标签: 稳定同位素 同位素测试 共振现象 假说 生活 同位素丰度