简介:Asacontagiousbacterialinfectionthataffectstheconjunctivalcoveringoftheeye,thecorneaandtheeyelids,trachomaiscontrolledbyanendorsedintegratedstrategyconsistingofsurgeryfortrichiasis,antibiotictherapy,facialcleanlinessandenvironmentalimprovement,namely,theSAFEstrategydevelopedbyWorldHealthOrganization.Developedbasedonevidencefrompreviousfieldtrialsandconstantlymodifiedinpractice,SAFEstrategyhasgreatlyboostedtheprogressintrachomacontrol.Regardlessofthefactthattherearestillmanypendingquestions,nationalprogramcoordinatorsareconvincedthattrachomacontrolinitiativebasedonSAFEstrategywouldbeeffective.
简介:Thispaperconsidersaworst-caseinvestmentoptimizationproblemwithdelayforafundmanagerwhoisinacrash-threatenedfinancialmarket.Drivenbyexistingofcapitalinflow/outflowrelatedtohistoryperformance,weinvestigatetheoptimalinvestmentstrategiesundertheworst-casescenarioandthestochasticcontrolframeworkwithdelay.Thefinancialmarketisassumedtobeeitherinanormalstate(crash-free)orinacrashstate.InthenormalstatethepricesofriskyassetsbehaveasgeometricBrownianmotion,andinthecrashstatethepricesofriskyassetssuddenlydropbyacertainrelativeamount,whichinducestoadroppingofthetotalwealthrelativetothatofcrash-freestate.Weobtaintheordinarydifferentialequationssatisfiedbytheoptimalinvestmentstrategiesandtheoptimalvaluefunctionsunderthepowerandexponentialutilities,respectively.Finally,anumericalsimulationisprovidedtoillustratethesensitivityoftheoptimalstrategieswithrespectivetothemodelparameters.
简介:Unmannedaerialvehicles(UAVs)mayplayanimportantroleindatacollectionandoffloadinginvastareasdeployingwirelesssensornetworks,andtheUAV’sactionstrategyhasavitalinfluenceonachievingapplicabilityandcomputationalcomplexity.Dynamicprogramming(DP)hasagoodapplicationinthepathplanningofUAV,butthereareproblemsintheapplicabilityofspecialterrainenvironmentandthecomplexityofthealgorithm.BasedontheanalysisofDP,thispaperproposesahierarchicaldirectionalDP(DDP)algorithmbasedondirectiondeterminationandhierarchicalmodel.WecompareourmethodswithQ-learningandDPalgorithmbyexperiments,andtheresultsshowthatourmethodcanimprovetheterrainapplicability,meanwhilegreatlyreducethecomputationalcomplexity.
简介:Learningstyleisdefinedasone’snatural,habitual,andpreferredwaysofabsorbing,processingandretainingnewinformationandskills.Inlanguagelearningprocess,learners’learningstylemayhelporhinderthemasteryofnewlanguage.Basedontheinfluentialpower,learningstyleshouldbecarefullynoticedinthewayofstrategytraining.ThispaperfocusesontheEnglishwritingstrategytrainingandaimstoputforwardsomesuggestions,puttingtheinfluenceoflearningstyleataprominentposition.
简介:对一个新震动的交配混乱方法的最近的描述关于它的可能的申请开了问题控制叶蝉Scaphoideustitanus球到另外的叶蝉害虫。自从为成功的申请是交配行为和联系信号的准确角色的种类的深知识的方法的前提,我们在绿叶蝉EmpoascavitisG上进行了行为的试金?,葡萄藤和其它的一个害虫在欧洲和亚洲收割。单身、配对的个人(男性和女性)的激光振动计记录在一个24h时期期间使我们能检测并且描述2男性和1个女信号。当一个男电话和一句对话的女答复被建立时,对形成开始,然后,它通过2个不同行为的阶段继续:地点和求爱。仅仅当男性找到女性时,合适的求爱开始。后者被一个重要变化在考虑信号和对话结构的时间的参数描绘。尽管男性打电话活动和女性的答复率在24h期间是一样,matings的一个更低的数字在夜里期间被记录。我们作为繁殖成功和交配策略的因素讨论视觉并且种类生态学的可能的角色。我们的结论是机械交配混乱技术为未来申请似乎可行到这种。
简介:BasedontheresearchofChinaandabroad,thisthesiscarriedonanempiricalstudyon272EnglishmajorsusingtheinstrumentofquestionnairesandgainedsomeimportantfindingsthatEnglishmajors’BeliefsaboutTranslationandTheirUseofChineseTranslationasalearningarecloselyrelatedwitheachotherwhichprovedthefindingsofPosenLiao.
简介:Inthethree-phasetrafficflowstudies,thetrafficflowcharacteristicatthebottlenecksectionisahotspotintheacademicfield.Thecontroversyaboutthecharacteristicsofthesynchronizedflowatbottleneckisalsothemaincontradictionbetweenthethree-phasetrafficflowtheoryandthetraditionaltrafficflowtheory.Undertheframeworkofthree-phasetrafficflowtheory,thispapertakestheon-rampasanexampletodiscussthetrafficflowcharacteristicsatthebottlenecksection.Inparticular,thispapermainlyconductsthemicro-analysistotheeffectoflanechangeunderthetwolaneconditions,aswellastheeffectoftheon-ramponthemainlinetrafficflow.Itisfoundthatwhenthemainroadflowislow,thegreatertheon-rampinflowrate,thehighertheaveragespeedofthewholeroadsection.Astheprobabilityofvehiclesenteringfromtheon-rampincreases,theflowandtheaveragespeedofthemainroadaregraduallystabilized,andthentheon-rampinflowvehiclesnolongerhaveasignificantimpactonthetrafficflow.Inaddition,thispaperfocusesonthevelocitydisturbancegeneratedattheon-ramp,andproposesthecorrespondingon-rampcontrolstrategybasedonit,andthesimulationverifiedthatthecontrolstrategycanreasonablycontrolthetrafficflowbytheon-ramp,whichcanmeetthecontrolstrategyrequirementstosomeextent.
简介:有双性人目标策略的一个扩充Lagrangian信任区域方法被建议因为解决非线性的平等抑制了优化,它在惩罚类型方法和没有惩罚的之间掉落。在每次重复,试用步被在一个信任区域以内最小化一个二次的近似模型到扩充Lagrangian功能计算。模型是为非强迫的优化的标准信任区域subproblem并且能被许多存在方法高效地因此解决。选择惩罚参数,辅助信任区域subproblem与限制违背有关被介绍。结果,惩罚参数不必monotonically正在增加并且不趋于到无穷。双性人目标策略,与客观功能和限制违背的措施有关,被利用决定试用步是否将被接受。方法的全球集中在温和假设下面被建立。数字实验被做,它在各种各样的困难的状况上说明算法的效率。
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简介:没有已知的州的方程,新州的评价策略被设计对为电子的恶意的攻击是物理系统。由数据重建的想法启发了,(CS)压缩察觉到基于系统状态的Markov图在察觉和鉴定计划以后被用于剩余大小的重建,它对欺骗攻击增加州的评价策略的跳回。首先,observability分析被介绍从攻击决定测量重建和损坏水平的被触发的时间。特别地,学习的字典被建议由K单个的值分解(K-SVD)形成过去完成的字典,它根据测量数据的特征适应地被生产。由于剩余大小的不规则,另外,一个采样矩阵作为测量矩阵被设计。最后,模拟实验在6公共汽车力量系统上被执行。大小的重建被建议重建方法完成很好的结果表演,和相应效果分别地基于联合字典和传统的高斯或Bernoulli随机的矩阵比重建计划好。特别,当仅仅29%可得到的干净大小是左的时,建议策略的性能仍然是非凡的,它为五种恢复算法反映概论。
简介:训练策略的一条河的选择为更低的黄河(LYR)是极其重要的。当前,宽河的训练策略在训练LYR适用。然而,在在黄河盆的水文学过程的显著变化,以及从在黄河盆的社会经济的开发的立即的压力,使如果有可能性改变从到狭窄河的训练的宽河的训练训练策略的河,考虑必要。这研究调查通过数字模拟在LYR上训练策略的不同的河的影响。一一个维(1-D)模型被用来为未来模仿河的过程50年并且一三维(3-D)模型被使用学习典型洪水。学习集中了于河形态学,结果看那在两水分泌物的在场减少趋势和沉积负担是否坚持,在LYR的免职率将进一步减少不管什么策略被使用。特别,狭窄河的训练能达到目的与宽河的训练相比在LYR增加沉积运输能力。如果到来的水和沉积负担恢复到最后世纪的吝啬的水平,主要隧道收缩不管多么不可避免地由于沉积发生为宽河、狭窄河训练。最重要地,这研究证明狭窄河的训练在整个LYR上减少免职数量,但是它几乎不在减轻推迟的河的发展提供很少帮助。相反,狭窄河的训练能在河模式从高度漫步到蜿蜒地流变化的过渡活动范围引起沉积,进一步的变得更坏在那里的驼峰免职。因为关于在在可行工程的黄河盆,和缺乏的水文学过程的未来变化的无常,测量在LYR减轻推迟的河和驼峰免职问题,小心应该在为LYR训练策略的河里关于变化被行使。
简介:Anall-fiberizedandnarrow-bandwidthmasteroscillatorpoweramplification(MOPA)systemwithrecordoutputpowerof4kWlevelandslopeefficiencyof78%isdemonstrated.Tandempumpingstrategyistentativelyintroducedintothenarrow-bandwidthMOPAsystemforthermallyinducedmodeinstability(TMI)suppression.ThestimulatedBrillouinscattering(SBS)effectisbalancedbysimplyusingone-stagephasemodulationtechnique.Withdifferentphasemodulationsignals,SBSlimitedoutputpowersof336W,1.2kWand3.94kWarerespectivelyachievedwithspectralbandwidthsaccountingfor90%powerof~0.025,0.17and~0.89nm.Comparedwithourprevious976nmpumpingsystem,TMIthresholdisoverallboostedtobe>5timesinwhichtandempumpingincreasestheTMIthresholdof>3times.Thebeamquality(M~2factor)oftheoutputlaseriswellwithin1.5belowtheTMIthresholdwhileitisultimatelysaturatedtobe1.86withtheinfluenceofTMIatmaximaloutputpower.ExceptforSBSandTMI,stimulatedRamanscattering(SRS)effectwillbeanotherchallengeforfurtherpowerscaling.InsuchahighpowerMOPAsystem,multidetrimentaleffects(SBS,SRSandTMI)willcoexistandmaybemutual-coupled,whichcouldprovideawellplatformforfurthercomprehensivelyinvestigatingandoptimizingthehighpower,narrow-bandwidthfiberamplifiers.