简介:EnergyisthedeterminantfactorforthesurvivalofMobileSensorNetworks(MSN).Basedontheanalysisoftheenergydistributioninthispaper,atwo-phaserelocationalgorithmisproposedbasedonthebalancebetweentheenergyprovisionandenergyconsumptiondistribution.Ourmainobjectivesaretomaximizethecoveragepercentageandtominimizethetotaldistanceofnodemovements.Thisalgorithmisdesignedtomeettherequirementofnon-uniformdistributionnetworkapplications,toextendthelifetimeofMSNandtosimplifythedesignoftheroutingprotocol.Inad-dition,testresultsshowthefeasibilityofourproposedrelocationalgorithm.
简介:TherecurrencealgorithmisgivenforthecalculationofNUAHB-splinesinthespaceSn+1=span{sinht,cosht,tn-3,...,t2.t,1}(n≥3).ThecaseofNUAHB-splinebasesofloworderwithmultipleknotsequencesisstudied.ThelimitingcasesofUAHB-splinesarerecoveredwhenshapeparametersa's→0+and+∞.ThenthecorrespondingNUAHB-splinecurveisdefinedanditsmainpropertiessuchasshape-preservingpropertiesareinvestigated.
简介:Whenoneendofanair-dryigneousrockblockwasuniaxiallyloadedinlaboratory,thereappearedanelectromotiveforcethatmadeelectriccurrentsflowfromthestressedvolumetotheunstressedvolume.Quartz-freerockssuchasgabbroalsogeneratedthisforce,strongerthanquartz-bearingrockssuchasgranite.Thisindicatesthatthepiezoelectriceffectofquartzandtheelectrokineticeffectofporewaterdonotmakealargecontributiontowardgeneratingtheelectromotiveforce.Wefocusonperoxybondthatisoneoftheabundantlatticedefectsinigneousrock-formingminerals.Whenmechanicalloadingdeformsthelatticestructurearoundthisdefectandbreaksitsbond,itsenergylevelschangeandactlikeanaccepter.AsanelectronistrappedatthisdefectfromaneighborO2-site,apositiveholeisactivatedthere.Theyattempttodiffusetowardtheunstressedvolumethroughthevalencebandandaresimultaneouslyaffectedbytheattractiveelectricforcewiththeelectronstrappedinperoxybonds.Thisleadstoapolarizationinthestressedvolumeandthegenerationofelectromotiveforcebetweenthestressedandunstressedvolumes.SimilarelectromotiveforcemaybegeneratedintheEarth’scrustwhereinhomogeneousstress/strainischanging.
简介:Non-uniformalgebraic-trigonometricB-splinessharesmostofthepropertiesasthoseoftheusualpolynomialB-splines.Buttheyarenotorthogonal.Weconstructanorthogonalbasisforthen-order(n≥3)algebraic-trigonometricsplinespaceinordertoresolvethetheoreticalproblemthatthereisnotanexplicitorthogonalbasisinthespacebynow.MotivatedbytheLegendrepolynomials,wepresentanovelapproachtodefineasetofauxiliaryfunctions,whichhavesimpleandexplicitexpressions.Thentheproposedorthogonalsplinesaregivenasthederivativesoftheseauxiliaryfunctions.
简介:Thispaperpresentsasimpleapproachforimprovingtheperformanceoftheweightedessentiallynonoscillatory(WENO)finitevolumeschemeonnon-uniformgrids.ThistechniquereliesonthereformulationofthefifthorderWENO-JS(WENOschemepresentedbyJiangandShuinJ.Comput.Phys.126:202–228,1995)schemedesignedonuniformgridsintermsofonecell-averagedvalueanditsleftand/orrightinterfacialvaluesofthedependentvariable.Theeffectofgridnon-uniformityistakenintoconsiderationbyaproperinterpolationoftheinterfacialvalues.Onnonuniformgrids,theproposedschemeismuchmoreaccuratethantheoriginalWENO-JSscheme,whichwasdesignedforuniformgrids.Whenthegridisuniform,theresultingschemereducestotheoriginalWENO-JSscheme.Inthemeantime,theproposedschemeiscomputationallymuchmoreefficientthanthefifth-orderWENOschemedesignedspecificallyforthenon-uniformgrids.Anumberofnumericaltestcasesaresimulatedtoverifytheperformanceofthepresentscheme.
简介:这份报纸处理一个模式III界面的裂缝题目到反飞机应力和在里面飞机电场。分析专注于从不一致的ferroelectric-ferroelastic领域由一个电场切换调节破裂坚韧。电的装载改变不对称的切换地区的尺寸。采用重量功能方法,我们获得韧化为的电子上依赖的开关静止并且变得界面的伪静电干扰分别地裂开。多域答案为杆得非、杆得充分的铁电体composites被导出。数字结果在批评应用压力紧张因素调节的电场上被介绍。研究提供方法由改变电场优化铁电体composites的破裂性质。
简介:有不同的片插头角度的离心的扇子的流动特征基本上为一把矩形的casing扇子在稳定、不稳定的模拟上被讨论。impellers的片插头角度是35?
简介:Amulti-objectiveoptimizationofnon-uniformbeamsispresentedforminimumradiatedsoundpowerandweight.Thetransfermatrixmethodisusedtocomputethestructuralandacousticresponsesofanon-uniformbeamaccuratelyandefficiently.Themulti-objectiveparticleswarmoptimizationtechniqueisappliedtosearchtheParetooptimalsolutionsthatrepresentvariouscompromisesbetweenweightandsoundradiation.Severalconstraintsareimposed,whichsubstantiallyreducethevolumefractionoffeasiblesolutionsinthedesignspace.Twononuniformbeamswithdifferentboundaryconditionsarestudiedtodemonstratethemulti-objectiveoptimaldesignsofthestructure.
简介:最后二十年在自然的河里为浅流动见证正常数字模型的开发和应用程序。然而,直到现在,为有不一致的沉积运输的流动没有如此的模型。这篇论文论述1D在冲积的河里模仿流动和不一致的沉积的非能力运输的正常模型。活跃的层明确的表达被采用解决床沉积作文的变化。在集中的有限体积斜坡LImiter(SLIC)的框架策划,一个表面坡度方法被合并达到正常答案到管理方程。建议模型与不规则的地形学靠着典型盒子被测试,包括挖出的沟再装满,沉积由于沉积由于山崩水坝失败过载和洪水流动。在计算结果和测量数据之间的协议是令人鼓舞的。比作一个非正常的模型,正常模型特征在复制舞台,速度和床变丑改进了性能。它应该在冲积的河里为不一致的沉积运输建模发现一般应用,特别在床地形学主要是不规则的山区。
简介:Thispapergivesthestrictsolutionofopticalfieldequationintheopticalwaveguideswithparabolic.Itshowsthatthephotonsinthenon-uniformopti-calwaveguidepropagatealongz-axisinspiralform,justlikeachargedparticlesmovinginthemagneticfield.Onlyinthestep-indexwaveguides,itcanthephotonspropagateinzizagform.
简介:因为他们能容易与二维、三维的数字模型相比被规划并且花去更少的时间,一个维的数字模型流行地在沉积运输研究被使用。特别地,他们拥有更大的能力与许多支流在大河盆被使用。这篇论文论述能够精明的全部负担的沉积运输的一个一个维的数字模型。cross-section-averaged沉积运输能力和恢复系数在推迟的负担模型被探讨。因此,这个一个维的模型能在黄河被用于好推迟的负担并且到hyperconcentrated流动。而且,为不稳定的不一致的推迟的沉积运输的方程的一个新discretization计划被建议。模型用在黄河上在Hongshui河和Sanmenxia水库里从Yantan水库测量的数据被校准。有地大小的计算的水水平和河床变丑的比较证明改进数字模型能够预言处于各种各样的状况排序的流动,沉积运输,床变化,和床材料,与合理精确性和可靠性。
简介:在在一个长期的服务时期上的好攻击的海洋的环境,沿海的桥不可避免地由于高海盐和湿度支撑导致腐蚀的损坏。这份报纸调查沿海的桥的力量减小,特别沿着桥墩的高度集中于不一致的腐蚀的效果。首先,腐蚀开始时间和加强和水泥的降级在海洋的环境为桥墩被分析。为了调查水泥的各种各样的损坏模式,盖住,有纤维房间的一个discretization方法在轴的力量和弯曲时刻的联合下面在大气的地区和潮汐的地区被用于桥墩的剖面图的精明的时间依赖者相互作用图。第二,这些变老的结构的shear力量被分析。数字模拟显示具体的墩的力量从腐蚀开始经历戏剧的减小到具体盖子的spalling。在骚动和潮汐的地区的力量损失比在大气的地区什么时候组织服务时间,被假定是一样的是更重要的。
简介:Anintegratedcouplingelementconsideringwheel-railinterfaceforanalyzingthedynamicresponsesofvehicle-rail-bridgeinteractionsystemwithanon-uniformcontinuousbridgeispresented.Thegoverningequationsoftheinteractionsystemareestablishedfirst,andthesolutionprocedureandassemblymethodofthecouplingelementaredemonstrated.Finally,theaccuracy,efficiencyandfunctionoftheintegratedcouplingelementaretestedusingtwonumericalexamples.Theinfluencesofdifferentcombinationsofrailandbridgeelementlengthinthecouplingelementonthesolutionareinvestigated,andtheeffectsofdifferentrailirregularitiesonthedynamicresponsesarediscussed.