简介：摘要本文从最基础的垂直入射理论入手，对影响鄂尔多斯盆地南部储层预测的强反射界面进行深入分析。通过地球物理正演分析，深入研究了强反射界面对上覆和下伏储层的影响。研究表明，受地震最大分辨能力的影响，强反射界面在地震最大分辨能力范围内对储层有较大的屏蔽作用，超过这个范围，这种影响就逐渐消失了。深入研究这种屏蔽作用，有利于进行精细地震储层预测。

简介：TocomparethedevelopmentofphysicalcrustsinthreetypicalcultivatedsoilsofChina,ablacksoil(LuvicPhaeozem),aloesssoil(HaplicLuvisol),andapurplesoil(CalcaricRegosol)werepackedinsplashplateswithcoveredanduncoveredtreatments,andexposedtosimulatedrainfall.Meshescoveredabovethesurfacesofhalfofsoilsamplestosimulatetheeffectsofcropresidueoncrusting.Theresultsindicatedaprogressivebreakdownofaggregatesonthesoilsurfaceasrainfallcontinued.Thebulkdensityandshearstrengthonthesurfaceofthethreesoiltypesincreasedlogarithmicallyasrainfalldurationincreased.Duringthefirst30minofsimulatedrainfall,thepurplesoildevelopeda7-8mmthickcrustandtheloesssoildevelopeda3-4mmthickcrust.Theblacksoildevelopedadistinguishable,butstillunstable,crustafter80minofsimulatedrainfall.Soilorganicmatter(SOM)content,themeanweightdiameter(MWD)ofsoilaggregates,andsoilclaycontentwerenegativelycorrelatedwiththerateofcrustformation,whereasthepercentageofaggregatedispersion(PAD),theexchangeablesodiumpercentage(ESP),andthesiltandsandcontentswerepositivelycorrelatedwithcrusting.Mechanicalbreakdowncausedbyraindropimpactwastheprimarymechanismofcrustformationintheblacksoilwithmorestableaggregates(MWD25.0mm,PAD3.1%)andhigherSOMcontent(42.6gkg~(-1)).Slakingandmechanicaleluviationweretheprimarymechanismsofcrustformationinthepurplesoilwithlowclaycontent(103gkg~(-1)),cationexchangecapacity(CEC,228mmolkg~(-1)),ESP(0.60%),andSOM(17.2gkg~(-1)).MechanicalbreakdownandslakingwerethemostimportantintheloesssoilwithlowCEC(80.6mmolkg~(-1)),ESP(1.29%),SOM(9.82gkg~(-1)),andhighPAD(71.7%)andMWD(4.6mm).Simulatedresiduecoverreducedcrustformationinblackandloesssoils,butincreasedcrustformationinpurplesoil.

简介：Propertiesofrefractoriesaffecttheirperfor-manceanddeformationbehaviouraswellastheirultimatefailuremode,Thereforeinordrtoassessthecapabilitiesofmaterials,usedforrefractorylin-ings,inservicetheirpropertiesmustbeevaluated.Inthisworktheevaluationofsomephysicalpropertiesofcalcinedkaloin(Kibi,Ghana)aggregatere-fractorybodiesshowedanaverageporosityandspe-cificgravityof24%and2.78respectively,Anav-eragecoldcrushingstrengthof19.6MPawasalsoobtained.Thermalexpansionandbehaviourunderaconstanthotloadof196kPaalsoshowedgoodresis-tancetohightemperaturedeformation.

简介：

简介：

简介：Besidesthebiologicalgrowthfactors,smallorganicmolecules,andchemicalions,physicalsignalsistheothercategoryofveryimportantfactorstotune/regulatethefateofstemcells.Recentyears,moreattentionhasbeenpaidonthedifferentiationofstemcellsonthephysicalsignal,including,electricormagneticfield,surfacetopologyofbiomaterials,photoirradiation,andevenpressureandstrainfromthematerials.With

简介：Deareditor,In2016,severallandmarkgovernmentinitiativeswerelaunchedinanefforttobuildamorehealthyChina.InMarch,theNationalPeople’sCongressofChinaadoptedthe13thFiveYearPlan,whichsetsoutnewobjectives,principles,andtargetsfor2016–2020,1includingactionplansforenhancingenvironmentalprotectionandgreengrowth,promotingindividualand

简介：Purpose:Toexaminetheassociationsamongpreschoolersfundamentalmotorskills,screen-time,physicalactivity(PA),andsedentarybehavior(SB).Methods:Childrenages3-4yearswereenrolledinaprospectiveobservationaltrialofPA.TrainedassessorsconductedtheTestofGrossMotorDevelopment-3rdedition(TGMD-3),andtheMovementAssessmentBatteryforChildren-2ndedition,andparent-reportedchildscreen-timeandsociodemographicinformation.Childrenworeanaccelerometerfor7daystoexamineSBandtotalPA(TPA).TPAwasfurthercharacterizedasmoderateto-vigorousPA(MVPA)orvigorousPA(VPA).Mixedlinearmodelswerecalculated,controllingforage(forTGMD-3),sex,householdincome,andaccelerometerweartime(foraccelerometrymodels),withchildcarecenterasarandomeffect.Theprimaryanalysisreportedonthecross-sectionalbaselinedataof126childrenwithcompletefundamentalmotorskillandscreen-timedata;asubanalysisincluded88childrenwithcompleteaccelerometrydata.Results:Childrenwere3.4±0.5yearsofage(54%girls;46%white,42%AfricanAmerican,12%other).Atotalof48%livedinhouseholdsatorbelowthefederalpovertylevel.Childrenengagedin5.1±3.6h/dayofscreen-time.Children’sscreen-timewasinverselyrelatedtotheMovementAssessmentBatteryforChildren-2ndedition,manualdexterityskillspercentile(β(SE)=-1.7(0.8),p=0.049).Intheaccelerometrysubsample,childrenengagedin5.9±0.9h/dayofTPAofwhich1.7±0.6h/daywasMVPA.BoysengagedinmoreMVPAandVPAandlessSBcomparedwithgirls(allp<0.05).AhigherTGMD-3,totalscore(b(SE)=0.4(0.2),p=0.017)andlocomotorscore(β(SE)=0.7(0.3),p=0.018)wereassociatedwithmoreVPAbutnotwithTPAorMVPA.Screen-timeandtelevisioninthebedroomwerenotrelatedtoSB,TPA,MVPA,orVPA.Conclusion:Children’smotorskillswerepositivelyrelatedtoVPAbutinverselyrelatedtoscreen-time.Furtherinquiryintotheimplicationsofhighexposuretoscreen-timeinyoungchildr

简介：Objective:Toexaminefactorsoftheyouthphysicalactivitypromotion(YPAP)modelthatareassociatedwithChineseinternationalstudents'meetingPArecommendations(MPAR).Methods:Atotalof649(females=320,males=329)Chineseinternationalcollegestudentsparticipatedinthestudy.ThisstudywasconductedintheUnitedStates(US.)betweenJuneandAugustin2011.Participantscompletedanonlinesurveyregardingtheirdemographic,PA,predisposing,enabling,andreinforcingfactors.Results:Logisticnested-regressionanalysissuggestedthatbeingmale,havingahigherbodymassindex,perceivedcompetence,self-efficacy,attitude,andenjoymentallincreased(p<0.001)theparticipants'oddsofMPAR.Exceptlanguagebarriers,alloftheenablingandreinforcingfactorspredictedMPARindirectlythroughthepredisposingfactors(p<0.001).Conclusion:UnderstandingfactorsthatinfluencePAamongChineseinternationalstudentsisanimportantstepintheprocessofpromotingtheirlong-termhealthandwellbeing.Designingprogramthataddresstheidentifiedkeyfactorsmayhelpcollegesanduniversitiesachievethisgoal.

简介：Background:Lately,physicalactivity(PA)inyounggirlshasbeenfrequentlydiscussed,thuswewereinterestedtoexaminewhetheramentaltraininginterventioncanincreasethelevelofPAinyounggirls.Methods:Asampleof56girlsaged15.4±0.3years(mean±SD)wasassignedtoeithertheinterventionorcontrolgroup.Wethenconducteda6-weekmentalimagerytrainingprogramonyoungfemaleparticipants.PAwasevaluatedwithobjectiveaccelerometermonitors.Physicalself-conceptwasalsoassessedinallparticipants.Results:Youngfemales'PAincreasedafteracourseofmentaltrainingcomparedtofemaleparticipantsincontrolgroup.Furthermore,physicalself-conceptimprovedrelatedtomentaltrainingprogram.Conclusion:ExerciseimagerymaybeaneffectivemethodofPAincreasebesidespsychologicalenhancementinyounggirls.

简介：ThephysicalandchemicalpropertiesofFFA-1ionexchangefiberhavebeencharacterizedwithIRspectrum,thermalanalysisandSEMmeans.ThepHtitrationcurve,swellingrate,mechanicalproperties,resistancedropoffilterlayeraswellasthedynamicadsorptionforSO2wasdetermined.TheseexperimentsprovidedtheessentialparametersforthepracticalapplicationofFFA-1materialinadsorptionoftoxicgases.

简介：Background：Beginningintheelementaryschoolyears,therearedifferencesamongchildrenonhowtheyperceivetheircompetenceinphysicalactivity（PA）.Children＇scompetenceperceptionsmayinfluencetheiraffectivereactionstoPA.AcrucialquestionishowtomotivatechildrenwhoholdlowcompetenceperceptionstoenhancetheirenjoymentandPAinvolvement.Becauseparentsplaycriticalrolesinchildren＇sdevelopmentandsocialization,socialsupportfromparentscanbeanimportantfactortocomplementteachers＇efforttoenhancechildren＇senjoymentandPAinvolvement.Inthisresearchweidentifiedtheassociationsamongchildren＇sbeliefsaboutparentalsocialsupport,perceivedcompetence,andenjoymentinschoolPA.Methods：Threehundredandtwentychildren（9-11yearsold）participatedinatwo-wavestudy.Atthefirstwave,childrencompletedquestionnairesmeasuringtheirbeliefsaboutparentalsocialsupport,perceivedcompetence,andenjoymentinschoolPA;theyreportedtheirenjoymentagain8monthslateratthesecondwave.Results：Bothconcurrentandlongitudinalanalysesrevealedthatbeliefsaboutparentalsocialsupportwereimportantfactorsassociatedwithchildren＇senjoymentinschoolPA,especiallyamonggirlswithlowcompetenceperceptions.Conclusion：Familysocializationfactorsshouldbetakenintoconsideration.Theefficacyofindividualandcommunity-levelstrategiesshouldbeincludedandevaluatedwhendesigningeffectiveinterventionstrategiesthatenhancechildren＇sPAinschool.

简介：在连续RapidIO(SRIO)的一个交通管理计划相连被建议处理噪音和电磁的干扰(EMI)引起的性能降级，它被硬件实现和坚韧的工作环境的几乎没可避免的错误产生。这个计划的主要想法包括适应速度转变和结冰承认(freeze-ACK)。适应速度转变能处于高小点错误率(BER)改进产量和还原剂延期环境。同时，freeze-ACK被采用征服反馈隧道的经常的用法。把适应速度转变与freeze-ACK相结合的计划在SRIO网络为大性能提供改进的模拟表演。

简介：Fromaneducationperspective,playhasalwaysbeenviewedasanintegralpartoflearningexperiences1andphysicalactivityisamajorcomponentinmanygamesthatchildrenplay.Inrecenttwodecades,rapidtechnology

简介：

简介：无线网络在更宽的光谱利用的时尚下面被开发(例如，认知无线电)并且多跳跃通讯(例如，无线网孔网络)。在这些范例，怎么有效地与最小化的相互的干扰分配光谱到不同传播连接成为关键担心。在这份报纸，我们在认知收音机网络(CRN)经由光谱分配学习产量优化。以前的研究合并冲突图或SINR模型描绘干扰关系。然而，以前的模型忽视积聚的干扰效果并且导致讨厌的干扰和非最优的结果，当工作在所有潜在的连接之中在估计的RSS(收到的信号力量)的精确性上基于后者模型忽视它的重信赖时。两个是不适当的描绘在干扰和产量之间的复杂关系。到这个目的，由考虑CR的特征，象光谱差异和间断OFDM一样，我们建议一个帮助测量的基于SINR的跨层的产量优化答案。我们的工作在不同的层使特征担心：在物理层，我们在场改进SINR模型的精确性的一个有效RSS评价算法；在上面的层，流动水平为WMN的基于SINR的产量优化问题作为一个混合整数被建模被证明NP难的非线性的编程问题。解决这个问题，一集中(1)最佳的算法和一个有效分布式的算法被提供。评估算法表演，真实世界的踪迹被用来说明我们的计划的有效性。

简介：

简介：S表面控制器被证明了提供有效运动控制为一自治在水下车辆(AUV)。然而，手工地调整他们的控制参数是困难的。为特别AUV的控制器选择最佳参数是重要挑战。自动化这个过程，一个修改的粒子群优化(MPSO)算法被建议。它基于有免疫力的理论，并且使用了非线性的回归策略让惯性重量优化AUV控制参数。为AUV的一个半物理的模拟系统作为一个平台被开发验证建议控制方法，并且它的结构被考虑。模拟结果显示半物理的模拟站台是有用的，优化算法有好本地、全球的寻找的能力，和方法能可靠地为AUV被使用。

简介：Thereareabout17chromosomesinyeastSaccharomycescerevisiae.Amiddlesizedchromosome,chromosomeV,waschoseninthisworkforstudyingandconstructingthephysi-calmaps.ChromosomeVfromstrainA364awasisolatedbypulsed-fieldgradientgelelectrophoresis(PFGE).GelslicescontainingchromosomeVDNAweredigestedwithtworarecuttingenzymes,NotⅠandSfiⅠ,andthree6-Ntrecognizingenzymes,SmaⅠ,SstⅡandApaⅠ.Severalstrategies-partialorcompletedigestions,digestionwithdifferentsetsoftwoenzymes,andhybrid-izationwithclonedgeneticallymappedprobes(CAN1,URA3,CEN5,PRO3,CHO1,SUP19,RAD51,RAD3)——wereusedtoaligntherestrictionfragments.Thereare9,9,15,17,and20sitesforNotⅠ,SfiⅠ,SmaⅠ,SstⅡandApaⅠrespectivelyinthemapoftheA364achromosomeV.Itstotallengthwascalculatedtobe620Kb(Kilo-bases).Thedistributionsofthecuttingsitesforthesefiveenzymesthroughthewholechromosomearenotuniform.Acomp-arisonbetweenthephysicalmapandthegeneticmapwasalsomade.

简介：Themechanismsofseismically-inducedliquefactionofgranularsoilsunderhighconfiningstressesarestillnotfullyunderstood.Evaluationofthesemechanismsisgenerallybasedonextrapolationofobservedbehavioratshallowdepths.ThreecentrifugemodeltestswereconductedatRPI'sexperimentalfacilitytoinvestigatetheeffectsofconfiningstressesonthedynamicresponseoradeephorizontaldepositofsaturatedsand.Liquefactionwasobservedathighconfiningstressesineachofthetests.Asystemidentificationprocedurewasusedtoestimatetheassociatedshearstrainandstresstimehistories.Thesehistoriesrevealedaresponsemarkedbyshearstrengthdegradationanddilativepatterns.Therecordedaccelerationsandporepressureswereemployedtogeneratevisualanimationsofthemodels.Thesevisualizationsrevealedaliquefactionfronttravelingdownwardandleadingtolargeshearstrainsandisolationofuppersoillayers.