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229 个结果
  • 简介:Byanalyzinghigher-accuracylocationdataoftheTangshanearthquakesequence,acleardistributionpatternofthreeaftershockbeltsintheNE,NWW,andNWdirectionsofhasbeenobtained.TheanalysisrevealsthreeruptureplanesofstrongeventsofMS7.8,MS7.1andMS6.9inthesequence.Itindicatesthatthecomplexpatterniscloselyrelatedtotheearthquakesource,andtheNE-,NWW-andNW-trendingregionalfaultzones,whichhavebeenrevealedbytheresearchofthepre-seismicityanomaly.Insummary,thesourceislocatedinthejunctionofthethreefaultzones,andtheruptureplanesofthethreestrongeventslocatedinthesourcecanberegardedasthelockedsegmentsonthethreefaultzones.Onthesegrounds,thepaperexplainsthecomplexityofthesourceandepicentraldistributionofaftershocks.

  • 标签: 地震序列 空间分布 唐山 原因 地震活动异常 数据分析
  • 简介:Inthepaper,weinvestigatethecompleteconvergenceandcompletemomentconvergenceforthemaximalpartialsumofmartingalediferencesequence.Especially,wegettheBaum–Katz-typeTheoremandHsu–Robbins-typeTheoremformartingalediferencesequence.Asanapplication,astronglawoflargenumbersformartingalediferencesequenceisobtained.

  • 标签: 完全收敛性 序列 最大部分和 强大数定律 定理
  • 简介:Wesystematicallystudiedtheinfluenceofmagneticfieldonzero-linemodes(ZLMs)ingrapheneanddemonstratedthephysicaloriginoftheirenhancedrobustnessbyemployingnoneqnilibriumGreen'sfunctionsandtheLandauerBiittikerformula.Wefoundthataperpendicularmagneticfieldcanseparatethewavefunctionsofthecounter-propagatingkinkstatesintooppositedirections.Specifically,theseparationvanishesatthechargeneutralitypointandincreasesastheFermileveldeviatesfromthechargeneutralitypointandcanreachamagnitudecomparabletothewavefunctionspreadatamoderatefieldstrength.SuchspatialseparationofoppositelypropagatingZLMseffectivelysuppressesbackseatteringandismoresignificantunderzigzagboundaryconditionthailunderarmchairboundarycondition.Moreover,thepresenceofmagneticfieldenlargesthebulkgapandsuppressestheboundstates,therebyfurtherreducingthescattering.ThesemechanismseffectivelyincreasethemeanfreepathsoftheZLMstoapproximately1|iniinthepresenceofadisorder.

  • 标签: GRAPHENE TOPOLOGICAL STATE zero-line STATE electronic
  • 简介:Thispaperwillpresentanapproximate/adaptivedynamicprogramming(ADP)algorithm,thatusestheideaofintegralreinforcementlearning(IRL),todetermineonlinetheNashequilibriumsolutionforthetwo-playerzerosumdifferentialgamewithlineardynamicsandinfinitehorizonquadraticcost.Thealgorithmisbuiltaroundaniterativemethodthathasbeendevelopedinthecontrolengineeringcommunityforsolvingthecontinuous-timegamealgebraicRiccatiequation(CT-GARE),whichunderliesthegameproblem.W...

  • 标签: 近似 / 适应的动态编程 游戏代数学的 Riccati 方程 零和的微分游戏 纳什平衡
  • 简介:今天的许多宇宙论的大小建议宇宙以经常的率正在膨胀。这从观察年龄对redshift关系和各种各样的距离指示物被推断,所有哪个到状态(曙光女神)的一个宇宙的方程的点p=/3并且分别地,p是全部的精力密度和宇宙的液体的压力。这结果不是巧合并且简单地证实在Friedmann-Robertson-Walker(FRW)度量标准的对称看起来为有零个活跃的团的媒介仅仅可行的事实,这最近被显示出,即,+3p=0。然而,在他们的最近的论文,Kim,Lasenby和霍布森(2016)提供了他们相信是到这个结论的一个相反的论据的。这里,,我们证明这些作者仅仅正在重复不正确地同时把观察员放在一个comoving框架的常规错误差错功能g当时,tt是并列依赖者+3p0,并且一据说不同,freefalling框架,在哪个gtt=1,不暗示时间膨胀。当时,我们证明小瘤流动不是惯性的+3p0因此,comoving框架通常不在FRW在免费秋天,comoving和自自落下的框架应当在每个spacetime点是相同的。那么框架的这混乱不仅与有的一般相关性,但是,另外的基本信条组成一个矛盾使用计量器转变选择一套坐标为的没有可能性哪个gtt=1什么时候+3p0。

  • 标签: 弗里德曼 活性物质 宇宙论 物质条件 时间膨胀 自由下落
  • 简介:在一个伪同步的代码部门多重存取(QS-CDMA)系统,在起源附近的关联函数影响系统性能和奇怪的函数象平函数一样重要。三种零个关联地区(ZCZ)序列被用来分析并且比较关联功能。调音的二进制阶段移动(BPSK)有传播在添加剂白人Gaussian噪音(AWGN)上编码隧道的三种QS序列的QS-CDMA系统的模拟证明这些序列是伪直角的,他们因此对QS-CDMA合适系统。在系统表演和顺序的零个关联地区之间的关联也被证明。

  • 标签: 准同步码分多址系统 无线通信 零相关 序列信号
  • 简介:Inordertomeettheneedsofhotrepairingtechnologyofcokeoven,thezeroexpansionsilicabrickwithsuperpropertieshasbeendeveloped,andtheproblemofpoorthermalstabilityofcommonsilicabrickhasbeenovercomned.Thisproductcanbedirectlyusedafterbeingrapidlyheatedafterconstruction.Atpresent,ithasbeenappliedincokeovensinItalyandBaosteel.

  • 标签: 零膨胀硅砖 热修补技术 炼焦炉 热稳定性 耐火材料 冶金
  • 简介:PerformancesofBPSK,balanced-quaternarymodulation,dual-quaternarymodulationandcomplex-quaternarymodulationindirect-sequencespectrum-spread(DS-SS)systemarediscussedinthispaper.Basedonthecriterionthepoweroforiginalsignalisthesame,itisshownthatcomplex-quaternarymodulationhasthebestperformance,anddual-quaternarymodulationdegrades2dB.Moreover,thefrequencyefficientofthetwomodulationsis2bit/Hz.Balanced-quaternaryhasthesameperformanceasBPSKwithfrequencyefficient1bit/Hz.

  • 标签: Modulation Direct-sequence spectrum-spread FREQUENCY efficient.
  • 简介:焊接顺序在通常在轮船使用的大直角地使硬的面板的失真模式上有重要效果并且近海结构。这些变丑不利地影响邻近的面板的随后的移动舞台和排列。它可以也导致结构的正直的损失。这些面板首先受不了尖、弄弯的失真。失真的程度取决于象焊接焊接的速度,板厚度,焊接电流,电压,当焊接时,用于这个工作的抑制,热历史以及顺序那样的几个参数。焊接和FE模型的试验性的确认的数字建模为热历史和产生失真的评价被执行了。在现在的工作,一个FE模型为学习在直角地使硬的板面板的制造在失真模式和它的大小上焊接顺序的效果被开发了。

  • 标签: 焊接顺序 加筋板 板片 结构完整性 有限元模型 制作
  • 简介:压缩(ZRT/IRT-like蛋白质)和CDF(阳离子散开Facilitator)是主要搬运锌进并且从cytosol的二个大金属transporter家庭。几快速做,CDF运输ers在哺乳动物和各种各样的模型有机体被描绘了,并且许多候选人基因被染色体工程识别了,例如酵母,线虫,水果苍蝇,和斑马鱼。压缩和CDF运输ers的意外功能最近在一些模型有机体被报导了,导致在我们哺乳动物的对应物的功能的理解的主要进展。这里,我们在从代表性的模型有机体获得的真核细胞的压缩和CDF运输ers之中在顺序类似和功能的关系上考察最近的信息。

  • 标签: 基因序列 真核细胞 锌元素 转运机制
  • 简介:Anionomer类型水运的聚氨酯分散(手)被获得从poly(丙烯乙二醇)(PPG),isophoronediisocyanate(IPDI)和通过修改prepolymerisocyanate的dimethylolpropionic酸(DMPA)处理。聚氨酯的二个系列被准备(组A和B)并且一个新预言模型基于灰关系分析被介绍在几个性质上预言原料的影响顺序例如固体内容,粘性,酸数字和聚氨酯的电解稳定性。模型罐头成功地通过设计示范实验在性质上预言原料的影响,这被发现。而且,预言模型的结果证明DMPA在粘性,部分酸价值和电解稳定性起一个关键作用。

  • 标签: 水性聚氨酯分散体 原材料 相似性分析 异佛尔酮二异氰酸酯 性能 预测模型
  • 简介:TwosequencescanbeidentifiedinthesedimentarystrataofthelowerTertiaryShahejieFormationintheZhanhuahollow.Thelowstand,lake-transgressiveandhighstandsystemstractswereformedunderthecontrolofancientstructure,palaeotopography,palaeoclimate,sed-imentsupply,marine-transgression,andsoon.Inthepapertheauthorspresentacompositese-quencestratigraphicalsectionoftheShahejieFormationinthisarea,andexpoundthebounda-riesofparasequences,parasequencessetandsystemstractsandevolutionsoflakesequencestratigraphyandsedimentologyanddiscussvariousfactorscontrollingthelakelevelfluctuation.Thedifferencesbetweenlakeandmarinesequencestratigraphyarealsoindicatedinthepaper.Thelakesequencestratigraphicalstudyshouldbebasedonasyntheticanalysisofstructuralevo-lution,palaeomagnetism,palaeoclimaticchanges,geologicalWelllogs,seismicandloggingdata,palaeontologicaldata,globalsealevelchanges,andsoon.Thesequencestratigraphicalevolutioniscloselyrelatedtotheformation,developmentandeliminationofthewholebasinandthesedimentaryprocess.

  • 标签: LAKE sequence STRATIGRAPHY SEDIMENTOLOGY LAKE level
  • 简介:Authenticationperframeisanimplicitnecessityforsecurityinwirelesslocalareanetworks(WLANs).WeproposeanovelperframesecureauthenticationschemewhichprovidesauthenticationtodataframesinWLANs.Theschemeinvolvesnocryptographicoverheadsforauthenticationofframes.Itutilizesthesequencenumberoftheframealongwiththeauthenticationstreamgeneratorsforauthentication.Hence,itrequiresnoextrabitsormessagesfortheauthenticationpurposeandalsonochangeintheexistingframeformatisrequired.Theschemeprovidesauthenticationbymodifyingthesequencenumberoftheframeatthesender,andthatthemodificationisverifiedatthereceiver.ThemodifiedsequencenumberisprotectedbyusingtheXORoperationwitharandomnumberselectedfromtherandomstream.TheauthenticationislightweightduetothefactthatitrequiresonlytrivialarithmeticoperationslikethesubtractionandXORoperation.

  • 标签: 无线局域网 安全认证 序列号 身份验证 异或运算 数据帧
  • 简介:SequencevariationofpartialcytochromebgenesbetweentwoCoiliaspecies,C.ectenesandC.mystus,wasinvestigated.Ofthe402nucleotides,twenty-seven(6.72%)arepolymorphicandallaresynonymoussubstitutions.Atthethirdpositionsofgeneticcondonofcytochromebgene,thetwospeciesshowanextremeanti-Gbias(<4%)andapronouncedbiastowardsAandC(>68%).Thereisnoaminoacidsequencedivergencebetweenthepartialcytochromebgenesofthetwospecies,indicatingaclosegeneticrelationshipbetweenthem.Thek-2pgeneticdistanceofpartialcytochromebsegmentofthetwospeciesis0.072,suggestingthatthespecieswereseparated3.6Maago,inthemiddlePliocene.Ourresultrevealsthatthecytochromebgeneisanappropriatemarkerforstudiesofpopulationgeneticstructuresandphylogeographicpatternsofthetwospecies.

  • 标签: 细胞色素 B基因 基因转化 线粒体DNA 凤尾鱼