简介:Bydifferentiatingfourdifferenttypesofoutput,thepaperarguesthattheirrolesarealsodifferent.Andlearnersofdiffer-entlanguageproficiencylevelsshouldbeguidedtoproducedif-ferenttypesofoutput.Thusthepaperintroducesanewconcept,namely"optimaloutput".BlindlymakingthelearnerproduceoutputwhichisfarbeyondhiscurrentEnglishlevelwillonlydoharmtohisinterlanguagedevelopment,makingitfossilizeatanearlystage.
简介:这份报纸学习在一个空间领域上演变的一个分布式的双线性的系统的地区性的稳定。为地区性的弱、强壮、指数的稳定的足够的条件被给。另外,我们讨论一个地区性的最佳的稳定问题。获得的结果被例子和模拟说明。
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简介:Thecapabilityofmultilayerperceptrons(MLPs)forapproximatingcontinuousfunctionswitharbitraryaccuracyhasbeendemonstratedinthepastdecades.Backpropagation(BP)algorithmisthemostpopularlearningalgorithmfortrainingofMLPs.Inthispaper,asimpleiterationformulaisusedtoselecttheleamingrateforeachcycleoftrainingprocedure,andaconvergenceresultispresentedfortheBPalgo-rithmfortrainingMLPwithahiddenlayerandalinearoutputunit.Themonotonicityoftheerrorfunctionisalsoguaranteedduringthetrainingiteration.
简介:UVwavelengthauto-tunedoutputsystemisrealizedbythedifferencemethod.Controlledbythemicroprocessor,outputwavelengthauto-trackingisachieved.Besides,equipmentself-checkingauto-positioningandtemperaturecorrectarerealized.Thewavelengthtunedoutputefficiencyintheexperimentisbetterthan97%.
简介:Focusislaidontheadaptivepracticaloutput-trackingproblemofaclassofnonlinearsystemswithhigh-orderlower-triangularstructureanduncontrollableunstablelinearization.Usingthemodifiedadaptiveadditionofapowerintegratortechniqueasabasictool,anewsmoothadaptivestatefeedbackcontrollerisdesigned.Thiscontrollercanensureallsignalsoftheclosed-loopsystemsaregloballyboundedandoutputtrackingerrorisarbitrarysmall.
简介:Thedynamicinput-outputmodeliswellknownineconomictheoryandpractice.Inthispaper,theasymptoticstabilityandbalancedgrowthsolutionsofthedynamicinput-outputsystemareconsidered.Undersomenaturalassumptionswhichdonotrequirethetechnicalcoefficientmatrixtobeindecomposable,ithasbeenprovedthatthedynamicinput-outputsystemisnotasymptoticallystableandthecloseddynamicinput-outputmodelhasabalancedgrowthsolution.
简介:EnvironmentallyExtendedInput-Output(EEIO)tableshavebecomeapowerfulelementinsupportinginformation-basedenvironmentalandeconomicpolicies.National-andprovincial-level10tablesarecurrentlypublishedbytheNationalBureauofStatisticsofthePeople’sRepublicofChinaaccordingtowell-definedconventions.However,county-level10tablesarenotprovidedasarulebyofficialstatisticsorganizations.ThispaperconductsanoverviewofcompilingEEIOtablesforenvironmentalandresourcesaccountingatthecountylevelandthenanswersseveralquestions:First,whatkindofdatashouldbepreparedforthecompilationofcounty-levelEEIOtables?Second,howcanwesetupcomprehensiveEEIOtablesatthecountylevel?Third,regardingthesurveymethodsandtheindirectmodeling,whichoneshouldbechosentobuildEEIOtablesatthecountylevel?Finally,whatpolicyquestionscouldsuchatableanswer?EEIOtablesatthecountylevelcanbeusedtopredicttheeconomicimpactsofenvironmentalpoliciesandtoperformtrendandscenarioanalysis.
简介:CHAOTICOUTPUTOFSSTFLUCTUATIONSTOCHASTICMODELWITHGIVENPARAMETERS¥YanShaojinandPengYongqing严绍瑾,彭永清(NanjingInstituteofMeteorolog...
简介:为有动态无常的非线性的系统的一个类,柔韧的适应稳定问题在这篇论文被考虑。由介绍一个观察员,第一,一个扩充系统被获得。基于系统,我们构造exp-ISpSLyapunov为unmodeled动力学工作,证明unmodeled动力学是exp-ISpS,然后获得一个动态使动态骚乱正常化信号抵抗。由backstepping技术,一个适应控制器被给,在适应控制系统的所有信号最终一致地全球性被围住,这被证明,并且输出能被调整到有任何规定精确性的起源。一个模拟例子进一步表明控制计划的效率。关键词Unmodeled动力学-Exp-ISpS-动态使中国(号码60304003)和节目的国家自然科学基础正常化信号-Backstepping-适应控制这个工作被在大学里为新世纪优秀才能支持(没有。NCET-05-0607)。苏海霞在2003在Qufu师范大学从数学的部门收到了她的学士学位。当前,她在一样的大学的自动化的研究所正在追求她的硕士学位。她的研究兴趣是非线性的适应控制。谢学军从系统科学的研究所收到了他的博士学位,在1999的中国科学院。他当前是在在Qufu师范大学的自动化的研究所的一个教授。他的研究兴趣为复杂系统包括适应控制。刘海宽在1991点从哈尔滨工学院收到了他的学士学位。他是在Xuzhou师范大学的一个教授。他的研究兴趣包括柔韧的控制,电源来源技术,和计算机有申请的综合系统。