简介：Inordertoexaminetheeffectivenessofengineeringprotectionagainstlocalizedscourinfrontofthesouthgroin-groupoftheYangtzeEstuaryWaterwayImprovementProject,PhaseI,anundistort-edphysicalmodelonageometricscaleof1:250isbuiltinthisstudy,coveringtwogroinsandtheiradacentestuarineareas.Byuseofrinsingfix-bedmodelaswellaslocalizedmobile-bedmodel,theexperimentisundertakenunderbi-directionalsteadyflow.Accordingtotheexperimentalresults,waterwaydredgingleadstotheincreaseinsteramvelocity,theincreasebeinglargerduringtheebbthanduringtheflood.Con-structionoftheupstreamgroinhassomeinfluenceontheflowpatternsnearthedownstreamgroin.Local-izedscourinfrontofthegroin-headsiscontrolledmainlybyebbflow.Inthecaseofariverbedcomposedentirelyofsilt,thedepthsoflocalizedscourinfrontofthetwogroin-headsare27mand29m,respectively.Inreality,theunderneathsedimentoftheprototyperiverbedisclaywhosethresholdve

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简介：Background：Physicaleducation（PE）isakeychannelthatimpactschildren＇sdecisionsandbehaviorsforhealthfulliving.Thisstudyevaluatedtheeffectsofaconcept-basedPE（CBPE）instructionalunit,featuredbyenergybalance（EB）education,onstudents＇knowledgelearning,situationalinterest,cognitive,andphysicalengagementsaswellasteachers＇perceptions.Methods：Fourthand5thgradestudents（n=468）inamid-westernstateoftheUnitedStateswererecruitedastheparticipants.FourelementaryschoolswererandomizedtotheCBPEorcontrolgroups.Students＇EBknowledge,situationalinterest,cognitiveengagement,andphysicalengagementweremeasuredbyaknowledgetest,theSituationalInterestScale—Elementary,writtentasksheets,andaccelerometers,respectively,whileteachers＇perceptionsoftheCBPEunitwerecapturedbyindividualinterviewsattheendoftheexperiment.Results：TheCBPEgroupshowedasignificantincreaseinEBknowledge,whilethecontroldidnot.Bothgroupsshowedasimilarincreasingtrendforsituationalinterestovertime,althoughthestatisticalresultsfavoredthecontrolgroup.Forphysicalengagement,theCBPEgroupdemonstratedastatisticallydifferentbutsubstantivelysimilarlevelofin-classphysicalactivitycomparedtothecontrolgroup.TheCBPEgroupalsoshowedamoderatelevelofcognitiveengagementthroughouttheunit.ThePEteachersreportedoverallpositiveperceptionsaboutteachingtheCBPEunit.Conclusion：TheseresultssupporttheutilityoftheCBPEunitinenhancingEBeducationalongwithfacilitatingpositivestudentinterestandengagementaswellaspositiveteachingexperiences.

简介：PhysicalsimulationisusedtostudythemovementofnonmetallicparticlesinAlmeltinelectromagneticfield.ItisfoundthattheterminalvelocityofparticlesindifferentReynoldsnumberrangehasdifferentfunctions.ByconfirmingdragforcecoefficientofnonmetallicparticleswithReynoldsnumberintherangeof0.2～10and10～25respectively,twofunctionsofterminalvelocityforsphericalnonmetallicparticleshavebeengotaccordingly,whichprovideatheoreticalbasisforseparatingnonmetallicinclusionsfromAlmeltinelectromagneticfield.

简介：Throughphysicalmodelingandnumericalsimulation,theflowfieldinaslabcontinuouscastingmoldwithelectromagneticstirringismeasuredunderdifferentcastingparametersandstirringcurrents.Toqualitativelyevaluatetheflowfieldinthemold,twoindexes,i.e.,moldfluxentrapmentandvelocityuniformity,areproposed.Basedonthesetwoindexes,someoptimizedstirringparametersunderdifferentcastingconditionscanbedetermined.

简介：Determiningthephysicalandmechanicalpropertiesofsoilanditsbehaviorforengineeringprojectsisessentialforroadconstructionoperations.Oneofthemostimportantprinciplesinforestroadconstruction,whichisusuallyneglected,istoavoidmixingorganicmatterwithroadmaterialsduringexcavationandembankmentconstruction.Thecurrentstudyaimedtoassesstheinfluenceoforganicmatteronthephysicalpropertiesandmechanicalbehaviorsofforestsoilandtoanalyzetherelationbetweentheamountoforganicmatterandthebehaviorofforestsoilasroadmaterial.Atypicalsoilsamplefromthestudyareawascollectedbesideanewlyconstructedroadbed.Thesoilwasmixedwithdifferentpercentagesoforganicmatter(controltreatment,5,10,and15%bymass)anddifferenttestsincludingAtterberglimits,standardcompaction,andCaliforniabearingratio(CBR)testswereconductedonthesedifferentsoilmixtures.Theresultsshowedthatsoilplasticityincreasedlinearlywithincreasingorganicmatter.Increasingtheorganicmatterfrom0%(control)to15%resultedinanincreaseof11.64%oftheplasticlimitand15.22%oftheliquidlimitafterdryingat110℃.Also,increasingtheorganicmattercontentreducedthesoilmaximumdrydensityandincreasedtheoptimummoisturecontent.Increasingtheorganicmatterfrom0to15%resultedinanincreaseof11.0%oftheoptimummoisturecontentandadecreaseof0.29g/cm3ofthemaximumdrydensity.OrganicmatterdecreasedtheCBR,whichisusedastheindexofroadstrength.Adding15%organicmattertothesoilresultedinadecreaseoftheCBRfrom15.72to4.75%.Therewasasignificantdifferencebetweenthetwodryingtemperatures(60and110℃)forthesameorganicmattermixtureswithlowerwatercontentvaluesafterdryingat60℃.Theresultsrevealedtheadverseinfluenceoforganicmatteronsoilengineeringpropertiesandshowedtheimportanceoforganicmatterremovalbeforeexcavationandfillconstruction.

简介：1.IntroductionChinahasbeentransforming.Sincethelate1970s,China’seconomyhasincreasedmanyfold,theproportionofChineselivinginurbanareashasmorethandoubled,lifeexpectancyhasincreasedby10years~1andthecountryhastransitionedfromthe'bicyclekingdom'totheworld’slargest'automarket'.~2Asaresult,Chinaisnowchallengedbythe'sideeffects'ofeco-

简介：Twokindsofbigsympodialbamboo,D.YunnanicusHsuehandWhangee(D.MembranaceusMunro)andtheirphysicalandmechanicalpropertieshavebeenstudiedinthepaper.TheresultsshowedthatthewhangeehasbetterphysicalpropertiesthanthatoftheYunnanicus,suchashigherdensity,lowertangentialandlongitudinaldryshrinkages.ThatalsoshowedthatWhangeehasstrongermechanicalpropertiesinMORandMOE,compressivestrengthandshearstrengthparalleltothegrain.Comparedwithsomewoodspeciesusedinarchitecture,thephysicalandmechanicalpropertiesofthetwokindshavereachedtherequirementofsomewoodarchitecturestructurematerials.

简介：喷雾器粒子清除的降水是在能改变物理的喷雾器和光性质的空气的一个重要移动过程。这份报纸在在集体集中的situ观察使用的四个雨事件前后在物理的喷雾器和光性质分析变化，数字集中，粒子尺寸分发，散布并且在在Xianghe全面大气的观察的6月和2013年7月的喷雾器的吸收系数在中国驻扎。清除的雨的效果与雨紧张和持续时间，风速度和方向有关的结果表演。在雨事件期间，喷雾器数字集中的时间的变化与在集体集中的变化一致，但是他们的解决尺寸的清除比率是不同的。在雨事件以后，喷雾器团集中的增加与直径以粒子的增加开始了<0.8m[使用空气动力学的粒子sizer(APS)测量]，并且有直径的好粒子<0.1m[使用扫描活动性粒子sizer(SMPS)测量]。降雨在与直径~移开粒子是很有效的0.6m并且比3.5m大。在粒子数字分发的山峰价值的变化(使用SMPS测量)在雨事件在100-120nm以内在粒子上反映强壮的清除效果前后，缩放范围。喷雾器在雨事件前后散布和吸收系数的变化模式是类似的，但是他们的清除比率不同它可能与喷雾器粒子尺寸分发和化学作文有关。

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简介：Purpose:Theaimofthisstudywastoevaluatetheprogram"Nomoresmoking!It’stimeforphysicalactivity",withamixedmethodsdesign,inordertocollectinformationtoimprovetheprogramforfutureapplications.Methods:Fortypatientsacrossfiveanti-smokingclinicsinCentralGreececompletedtheprogram.Counselors’recordsandparticipants’questionnairesandinterviewswereusedasdatainordertoevaluatetheprograms’processandoutcome.Results:Quantitativemeasuresbeforeandaftertheprogramrevealedsignificantdifferencesonsmokingbehavior,physicalactivity(PA)behavior,self-efficacy,andsmokinghabitmeasures.QualitativedataimpliedthatthepromotionofPAasacessationaidwasperceivedaspositivebytheparticipantsandbothparticipants’andcounselors’statementswereencouragingfortheeffectivenessofPApromotionduringtheprogramasacessation-aidtechnique.Conclusion:Evaluationofthe"Nomoresmoking!It’stimeforphysicalactivity"programshowedencouragingresults.PeoplewhotrytoquitsmokingcanbecomemorephysicallyactivethroughtargetedinterventionandtheyregardPAasasignificantaidintheireffortstoquitsmoking.

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简介：Intensevisibleemissionsfromdysprosium（Dy3+）ionsdopedglassesbecameprospectivefordiversetechnologicalapplications.Inthispaper,physical,opticalandstructuralpropertiesofmagnesiumborateglassesdopedwithvariedconcentrationsofDy2O3wereexamined.Suchglassesweresynthesisedbymeltquenchingmethodandcharacterizedatroomtemperatureusingseveralanalyticaltechniques.Luminescenceandabsorptionspectra（inthevisibleregion）ofas-quenchedsampleswereusedtoevaluatethephysicalandopticalproperties.XRDpatternconfimstheamorphousstateofas-quenchedsamples.TheFouriertransforminfrared（FTIR）spectraofglassesrevealvariousbondingvibrationsassignedtodifferentfunctionalgroups.UV-vis-NIRspectradiscloseeightabsorptionbandsaccompaniedbyabandforhypersensitivetransitionpositionedat1260nm(6H15/2→6F11/2).ThevaluesofdirectandindirectopticalenergybandgapofthestudiedglassesaredecreasedwiththeincreaseofDy3+ioncontents.Thephotoluminescencespectraofallglassesundertheexcitationof380nmdisplaytwoprominentemissionbandscentredat497nm(4F9/2→6H15/2,blue)and587nm(4F9/2→6H13/2,green).Theachievedintenseluminescencefromtheproposedglasscompositionmaybebeneficialforsolidstatelaserapplications.

简介：植物侵略创造新奇plantinsect相互作用。EICA(增加的竞争能力的进化)因为他们逃离他们的共同演变的昆虫天赋敌人，假设建议侵略植物将从防卫重新分配资源到生长或复制。由monophagous和寡食性的草食动物和各种各样的植物特点的同时的测量的严峻的多重herbivory将提供新卓见进侵略植物的进化变化。在这上下文，我们进行了一个普通花园实验比较植物生长和复制，化学、物理的防卫，和对由在侵略北美的人口和mile-a-minute的本国的东方亚洲人口之间的草食动物的不同类型的herbivory的植物回答除草，Persicariaperfoliata。我们发现侵略mile-a-minute展出了更低的生物资源，flowered更早、有的更大的繁殖输出比从本国的范围的植物。与本国的人口相比，从侵略人口的植物有更低的丹宁内容，但是在节点和叶子上展出了更高的皮刺密度。因此，我们的结果部分支持EICA假设。当暴露了到monophagous昆虫，Rhinoncomimuslatipes和寡食性的昆虫时，Gallerucidagrisescens和Smaragdinanigrifrons，由herbivory的更多的损坏比在土著人上在侵略植物上被发现。R。latipes，G。grisescens和S。nigrifrons分别地在mile-a-minute的生长和繁殖上有强壮、中等、弱的影响。结果显示mile-a-minute可能发展了一个更高繁殖的能力在里面与缺乏一起的介绍范围，和这寡食性并且在新范围的monophagous草食动物可能在北美洲贡献了它的侵略。

简介：这份报纸基于模型引用论述一个新奇提高的人机器人的相互作用系统适应控制。介绍方法交付保证稳定性和任务性能并且让二控制环。一个机器人特定的内部环，是一个neuroadaptive控制器，在网上学习机器人动力学并且让机器人象一个规定阻抗模型一样反应。这个环不使用任务信息，包括没有规定轨道。一个任务特定的外部环考虑人的操作符动力学并且使规定机器人阻抗模特儿适应以便联合人机器人的系统为任务性能有理想的特征。这个图案基于模型参考适应控制，但是一种非标准的形式。网络结果是有扩充人的操作符提供人机器人的队的改进任务性能的两个适应阻抗特征和assistive输入的一个控制器。模拟在一项重复点对点的运动任务验证建议控制器的表演。一个PR2机器人上的实际试验性的实现进一步支持途径的有效性。

简介：MethodofVSC(VoltageShortedCompaction)canbeusedtodeterminetheintrinsictemperaturedependenceofconductivityofpolycrystallinecompaction.TheexperimentalconditionsandtechnicalkeyforpreparationofVSCdeviceanditsphysicalmodelaswellasitsapplicationsinconductingpolymersarediscussedindetail.

简介：Dr.NeilLotantin,thehonorarypresidentoftheHarvardUniversity,oncesaid,“Weshouldweakentheprofessionaltrainingofuniversities,butstrengthenthehumanitieseducationofcollegestudents.”Infact,underthebackgroundofhighereducationinhighereducation,thecultivationofstudents’excellenthumanisticqualityshouldbebasedonthecultivationoftechnicalability,whichisthebasiccoreofthecurrentqualityeducation.Thispapermainlystudiesthehumanisticqualityeducationofcollegephysicaleducationstudents,pointsouttheinfluencingfactorsaffectingtheconnotationoftheirhumanisticqualityeducation,andputsforwardcorrespondingcountermeasures,hopingtodevelopanewwayforcollegesportsmajorstoeffectivelycarryoutthecorrecthumanisticqualityeducation.

简介：Thethermalforcingsofannualandinterannualperiodicvariationsareintroducedintothebarotropicvorticityequation,byusingloworderspectralmodeloftheequation,morethan40numericalexperimentswhoseintegrationtimeislargerthan100modelyearsareperformedinordertoinvestigatevariationsoflarge-scaleflowpatternsarisingfrombothexternalinterannualthermalforcingandinternaldynamicalprocesses.Incertainparametricrange,whenthefre-quencyoftheforcingtermwithinterannualperiodequalstothefrequencywhichiscreatedbytheinternaldynamicalprocessesalone,theamplitudeofinterannualvariationsofflowpatternsincreasesobviously,andtheperiodbecomesdouble.Inotherparametricrange,theamplitudeofinterannualvariationsofflowpatternsshowsabruptchangesandothernonlinearbehavior,alongwithgradualchangesofinterannualforcingparameters.

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