简介：

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简介：联合润滑油理论和CFD技术，一个有限元素模型被建立模仿rain-wind-induced颤动(RWIV)。基于Spalart-Allmaras(S-A)骚乱类型，COMSOL软件被采用计算风压力系数和与地点和时间变化的风磨擦系数。为了以不同的风速度验证小河的这个方法，形成和进化的诚实和合理性，被学习并且与存在相比试验性的结果。而且，小河的起始的形成的时间，地点，高度和宽度以不同的风速度被分析，电报倾斜角度和风偏航角度。结果证明上面提及的三个影响因素穿上大效果小河的形成，和影响趋势，范围和度与对方不同。

简介：Inthispaper,anewadaptiveoptimalguidancelawwithimpactangleandseeker’sfield-of-view(FOV)angleconstraintsisproposed.Tothisend,thegeneralizedoptimalguidancelawisderivedfirst.Achangeableimpactangleweighting(IAW)coefficientisintroducedandusedtomodifytheguidancelawtomakeitadaptiveforallguidanceconstraints.Afterintegratingtheclosed-formsolutionoftheguidancecommandwithlinearizedengagementkinematics,theanalyticpredictivemodelsofimpactangleandFOVanglearebuilt,andtheavailablerangeofIAWcorrespondingtoconstraintsiscertain.Next,acalculationschemeispresentedtoacquirethereal-timevalueofIAWduringtheentireguidanceprocess.Whenapplyingtheproposedguidancelaw,theIAWwillkeepsmalltoavoidatrajectoryclimbinguptolimitFOVangleataninitialtimebutwillincreasewiththeclosingtargettoimproveimpactpositionandangleaccuracy,therebyensuringthattheguidancelawcanjuggleordersofguidanceaccuracyandconstraintscontrol.

简介：Aeratorisanimportantdeviceforreleaseworksofhydraulicstructureswithhigh-speedflowinordertoprotectthemfromcavitationdamage.Thiskindofprotectingeffectisrelatedcloselytocavitylengthbelowtheaerator,whilethecavitylengthisdominatedbytheemergenceangleovertheaerator.Thereforeitiscrucialtodeterminethisangleaccurately.Inthepresentpapertheaffectingintensitiesofflowdepthandthefluctuatingvelocityonthisanglewereanalyzedthroughtwointroducedparameters.Furthermore,theimprovedexpressionsofemergenceangleestimation,forbothramp-typeandstep-typeaerators,werepresentedbymeansof68setsofexperimentaldatafrom6projectsbasedonerrortheory.Theresultsshowedthatthepresentmethodhashigheraccuracythanthepreviouslyreportedmethods.

简介：ItwouldbeimpossibletounderstandIndiawithoutanyknowledgeaboutthereligionsofthiscountry.Indiaisadevelopingcountrywithmanyreligions,nationalitiesandlanguages.Thisnationhaslongbeennotedforitsdemocraticpoliticsandmulticulture.Indiawasfoundedontheprincipleofsecularism,butatthesametimeithassufferedfromreligions.Therefore,tohaveaclearideaaboutthebasicconditionsofIndia'smultiplereligiousbeliefsisthefoundationforstudiesofitsreligionsofthecountry,andisalsoonekeytograspingIndiansocialpolitics.InearlySeptember2004,theIndiangovernmentpublishedreligiousdatafromthe2001census.Accordingly,wecanmakesomebasicjudgmentsaboutthereligionsintoday'sIndia.

简介：方面折射是水平角调查的主要错误来源，但是它几乎没由分析影响在方面上有小影响在theultrahigh精确上大气违犯方面和角度调查ing。选择面向的方向对距离关键，在分成三角形定量的角度测量联网怎么在角度测量期间选择面向的方向被介绍，并且检查qua的工具点亮与Georobot调查汽车也向前被带。最后，当处理并且调查超离频精确的分成三角形定量网络时，减少方面折射的影响的一些解决方案被提出。

简介：Aleafinclinationangledistributionmodel,whichisapplicabletosimulateleafinclinationangledistributioninsixheightsoflayeredcanopyatdifferentgrowthstages,wasestablishedbycomponentfactorsaffectingplanttypeinrice.Theaccuracyofthesimulationresultswasvalidatedbymeasuredvaluesfromafieldexperiment.Thecoefficientofdetermination(R2)andtherootmeansquareerror(RMSE)betweenthesimulatedandmeasuredvalueswere0.9472and3.93%,respectively.Thesimulationresultsshowedthatthedistributionofleafinclinationanglesdifferedamongthethreeplanttypes.TheleafinclinationangleswerelargerinthecompactvarietyLiangyoupeijiuwitherectleavesthanintheloosevarietyShanyou63withdroopyleavesandtheintermediatevarietyLiangyouY06.TheleafinclinationanglesweredistributedinthelowerrangeinShanyou63,whichmatchedupwithfieldmeasurements.Thedistributionofleafinclinationanglesinthesamevarietychangedthroughoutthesevengrowthstages.Theleafinclinationanglesenlargedgraduallyfromtransplantingtobooting.Duringthepost-bootingperiod,theleafinclinationangleincreasedinShanyou63andLiangyouY06,butchangedlittleinLiangyoupeijiu.Ateverygrowthstageofeachvariety,canopyleafinclinationangledistributiononthesixheightsofcanopylayerswasvariable.Ascanopyheightincreased,thelayeredleafareaindex(LAI)decreasedinallthethreeplanttypes.However,whiletheleafinclinationanglesshowedlittlechangeinLiangyoupeijiu,theybecamelargerinShanyou63butsmallerinLiangyouY06.Thesimulationresultsusedintheconstructedmodelwereverysimilartotheactualmeasurementvalues.Themodelprovidesamethodforestimatingcanopyleafinclinationangledistributioninriceproduction.

简介：Theworkingprofileofwholecycloidalgearismadeupofepicycloidandhypocycloidentirely,accordingtothetheoryofmeshingofgearsandthepropertiesofthecycloid,dealswiththederivationofthepressureangleformulaforthewholecycloidalgearintheory,andrevealschangesofthepressureangleofwholecycloidalgearthroughexamples,findstheapplicationrelationshipsbetweenthepressureangleandotherdesignparametersofthewholecycloidalgear,provesthepossibilitythatthewholecycloidalgearcanbeusedininternalparallelmovegearmechanism,alsoprovidestheoreticfundamentfordesigninginternalparallelmovewholecycloidalgearcorrectly.

简介：ItisofgreatsignificancetohaveaclearunderstandingoftheinternationalenvironmentthatChinafaces.Butthisisanuneasyjob.SinceSeptember11,theworldsituationhasbecomesocomplicatedthatitishardtograspitsessenceevenwithpainstakingefforts.TojudgesuchanalreadycomplicatedinternationalenvironmentfromChina’sperspectiveaddsmoredifficulties,fordifferentpeopleusuallyhavedifferentviewsduetothedifferentanglesfromwhichtheyseethesituationanddifferentmethodstheyadopt.This,understandably,leadstohotdebateswithintheChineseacademiccircles.Toprovideastageforexchangeofviews,attheinvitationoftheCIRExpertForum,somewell-knownscholarsandexpertsoninternationalrelationsfromBeijinggatheredtoholdasymposiumonNovember5,2002,withthethemeof"HowtoassesstheinternationalenvironmentthatChinafaces".Thespeechesatthesymposiumarepublishedintwoinstallments.Followingarethesecondhalf.

简介：ObjectiveToreportexperienceswithuseofotoendoscopyincerebellopontineangle(CPA)surgeries.MethodsTwentyfivecasesofCPAsurgeriesperformedbetweenNovember2002andDecember2008inwhichmicroscopeenabledotoendoscopywasusedwerereviewed.The25casesincluded19casesofacousticneuroma,3casesofCPAfacialnervetumors,1caseoftrigeminalneurinoma,acaseofglossopharyngealneuralgiaand1caseofhemifacialspasm.Endoscopywasusedinallcasestogetherwithmonitoringofbrainstemauditoryresponsesandfacialelectromyography.Postoperativehearingandfacialnervefunctionwereevaluatedandcomparedtopre-operativelevels.ResultsEndoscopyprovidedimprovedvisualizationoflocalanatomy,revealedhiddenlesionsandreducedunnecessaryanatomicaldistortions.Totalresectionwasachievedin18ofthe19acousticneuromacases,Facialnerveanatomicalintegritywaspreservedinall19cases.OneweekpostoperativeHouse-BrackmanngradingwasIin3cases,Ⅱin10casesandⅢin6cases.Facialnervefunctioncontinuedtoimproveinsomecasesat3months.Totaltumorresectionwasachievedinall3patientswithfacialneurinoma.Thefacialnervewassacrificedin2ofthe3caseswithprimaryfaciohypoglossalnerveanastomosis.FacialnervefunctionwasGradeⅡandGradeIIIoneyearaftersurgery,respectively.Inthecasewithanatomicallypreservedfacialnerve,postoperativefacialnervefunctionwasinitiallyGradeⅢandimprovedtoⅡat3months.ThetumorwascompletelyresectedinthetrigeminalneurinomapatientwithaGradeⅢpostoperativefacialnervefunctionwhichimprovedGradeIIthreemonthslater.Seventeenofthe19patientswithacousticneuromaretainedhearingpostoperatively,ofthese12maintainedpreoperativelevelsofhearing.Preoperativehearingcapacitywaspreservedin2ofthe3patientswithfacialnervetumors,butlostinpatientswithothertumortypes.Glossopharyngealneurotomy(n=1)andmicrovasculardecompression(n=1)resultedinsatisfactorysymptomrelie

简介：Inthisstudy,thesampledatawasbasedon2790samplesof9treesfromdahurianlarch（Larixgmelinii）plantationslocatedinQitaiheForestBureauinHeilongjiangProvince.ThemodifiedLogisticmodely=b1/[1+exp（b2x）]+b3wasselectedtomodelingmicrofibrilanglefromsixmodelsbasedonnonlinearregression.Then,thelogisticmodelwasfittedusingnonlinearmixed-effectmodelingapproachbasedonNLMEofS-PLUSsoftware.Evaluationstatistics,suchasAIC,BIC,LogLikelihoodandLikelihoodratiotestwereusedformodelcomparisons.TheresultsshowedthattheLogisticmodelwithparametersb1,b2,b3asmixedeffectsshowedthebestperformance.Correlationstructuresincludedcompound-symmetrystructure（CS）,first-orderautoregressivecorrelationstructureAR（1）,movingaveragecorrelationstructureMA（1）andautoregressive-movingaveragecorrelationstructure[ARMA（1,1）]wereincorpratedintothebestmicrofibrilanglemixedmodel.[ARMA（1,1）]significantlyimprovedtheprecisionofmixedmodel.Validationconfirmedthatthemixedmodelwithcalibrationofrandomparameterscouldprovidemoreaccurateandpreciseprediction.Therefore,theapplicationofmixedmodelnotonlyshowedthemeantrendsofmicrofibrilangle,butalsoshowedtheindividualdifferencebasedonvariance-covariancestructureandcorrelationstructure.

简介：Microfibrilangle(MFA)inChinesefirwastestedbyX-raydiffractionapparatusandcalculatedbycomputersoftware.Theresultswereasfollows:MFAwascontrolledstronglybyinheritance,andtherewasnosignificantdifferenceinMFAamonginterspecies,juvenileandmaturewood.Inthelongitudinal,MFAreduceswiththeheightrisingfrom0to5.5m,especiallyintheheightsfrom0to1.5m.ThevaluesofMFAarenearlyconsistencefrom1.5to7.5m.Thevariationrangewasbetween10.82oand12.57ofrom1.5to7.5m,R2ofpowerequationachieved0.9321,andanalysisofvarianceindicatedthatthevariationofMFAwasnotsignificantfrom1.5to7.5m.TheageofthetreeshadanimportantinfluenceonMFA,consequently,thedifferenceinMFAwassignificantamongannualringsinradial,whichwasmaximalinnearpithandreducedrapidlyfromthepithtosapwood,anditsdeclinetendencywasslowbeyondtheninthannualring.MFAreachedminimumvalueatthe15thannualring,andthedifferencereachedmorethan20oandR2ofbinomialequationachieved0.7556.

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简介：Thedesignsofinertialconfinementfusion(ICF)targets,whichfieldonShenGuangIII,arebecomingmorecomplexandmorestringentintermsofassemblyprecision.Akeyspecificationofthesetargetsisthespatialanglealignmentaccuracy.Tomeettheseneeds,wepresentanewspatialangleassemblymethod,usingtargetpart's3Dmodel-baseddualorthogonalcameravision,whichisbettersuitedfortheflexibleautomationoftargetassemblyprocesses.Thetwo-handsstructuremicromanipulatesystemanddualorthogonalstructurevisualfeedbacksystemwereinvestigatedbyconsideringthekinematics,spatialanglemeasuring,andmotioncontrolinanintegratedway.Inthispaper,wediscussthemeasurementaccuracyofspatialangleassemblymethod,whichcomparedthereal-timeimageacquisitionwiththeredrawing2Dprojection.Theresultshowsthattheassemblymethodproposedisveryeffectiveandmeetstherequirementsofangleassemblyaccuracy,whichislessthan1°.Also,thisworkisexpectedtocontributegreatlytotheadvancementofothertargetmicroassemblyequipments.

简介：Birthdefectsaffectthequalityofthenewbornpopulation,andhavebecameamajorpublichealthprobleminChina.Geneticfactors,environmentalfactors,andtheinteractionofthetwoisthedirectcauseoftheincidenceofbirthdefects.Thisreview,basedontheneuraltubedefectsasanexample,giveinsightintothepathogenesisofbirthdefectsfromthegenomics,epigenetics,metabonomicsandenvironmentfactorsandexplorenewstrategyofbirthdefectpreventioninChina.

简介：实验与1.5m和四个不同斜坡的经常的长度在一个2-dimentional水池上被执行。速度，雷纳兹压力和骚乱紧张的分布在这份报纸被学习了。结果证明当流动在出口斜坡上面继续，流动速度在隧道床附近增加，减少接近水表面。流动分离没被副词在床形式的冠观察。另外，分离地区的长度与增加入口和出口斜坡增加。最大值使正常化的最大的斜坡角度原因砍应力。基于实验，雷纳兹的形状强调分发通常依赖于入口和水池的出口斜坡，这被结束。另外，雷纳兹压力分发的形状被速度并且加速流动影响。随斜坡角度的增加，另外，第二等的水流被开发并且变得更稳定。在流动和床形式之间的动量主要被转由的象限分析表演的结果扫并且喷射事件。

简介：认出无线网络的边界满足一些特定的需要，在一个网络在每个节点的1-hop邻居散布的节点的相对方位角角度被用来认出网络的边界。一个新奇识别算法基于本地概括的凸的壳被建议让一个节点决定是否它自我是一个边界节点。算法的灵活性，效率和一致性被广泛的模拟在它的表演显示出。

简介：Themainobjectiveofthisresearchistoevaluatethewettabilityoftheprocessedbamboosurfaces.Theimportantsurfaceenergyandacid-basepropertiesforprocessedbamboohavebeenestimatedbyusingcontactangletechniques.Accordingtotheresults,thechangeofageshasapositiverelationwiththecontactanglesofwateronprocessedbamboo.Thecontactangleswereincreasedafterthebamboosurfacetreatedinhightemperatureconditionandpreservation.Thedifferenttreatmethodshaveastro...

简介：为为反映使倾向的发生光反映正常发生光和其它与一DBR带的联合DBR被MOCVD种了。为改进被用来在带的AlGaInP红光增加轻抽取效率的常规DBR被分析。在20妈Dc注射电流，带的山峰波长是630nm，和光紧张上轴是137mcd。产量光力量是2.32mW。轻紧张和产量光力量与常规LEDs相比被改进了。CLC数字TN312+.8工作被北京科技委员会(工程数字D0404003040221)支持