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79 个结果
  • 简介:下游的移动与暴风雨长度袭击的假设不到分水岭长度(Ls/L<1.0)放大在以前的研究由运动学波浪的模型显示了的山峰分泌物在无尺寸的山峰分泌物和无尺寸的暴风雨速度的分析被评估。在UrbanaChampaign在伊利诺大学在分水岭试验系统(WES)为一个塑造V的分水岭收集的以前未出版的试验性的数据,与一个运动学波浪的模型的模拟结果比较被使用。与L山峰与静止暴风雨相比解除到有限程度的s/L<1.0增加,和运动学波浪的模型说大话源于下游的移动的山峰流动的增加与Ls/L<1.0。为了评估回水的重要性,在试验性的分水岭完成,为源于在上游、下游的动人的暴风雨的表面流量的模拟的运动学波浪、动态波浪的模型的精确性被评估利用一样的试验性的数据。运动学波浪的模型模仿在上游的移动暴风雨相当好,即模型的NashSutcliffe系数分别地为等于、不等于分水岭长度的暴风雨长度适合等于0.948和0.831的效率。而,运动学的波浪模型实质地过高估计下游地移动暴风雨,和收益的山峰分泌物通常更差比为在上游的动人的暴风雨适合,即为有等于、不等于分水岭长度的长度的暴风雨的NSE平等者到0.867和0.674分别地。动态波浪的模型模仿下游的移动暴风雨相当好,即为有等于、不等于分水岭长度的长度的暴风雨的NSE平等者到0.843和0.879分别地,显示回水显著地为甚至这个简单试验性的分水岭影响流量。考虑到那个暴风雨运动实质地没放大山峰分泌物,在标准hydrologic设计做的静止暴风雨的假设似乎合理、足够。

  • 标签: 实验评价 运动波 流量比 风暴 峰值 模型模拟
  • 简介:TheChinesemainlandisdividedintosometectonicblocksbynearlyNE-andEW-orientatedfaults.MeanwhilestrongearthquakesintheChinesemainlandusuallyclusterintimeandspace.Wecall2earthquakesingroups2.TectonicblocksseparatedbyfaultsandearthquakesingroupsareprominentfeaturesofthetectonicsoftheChi-nesemainland.Correlationbetweenmovementoftectonicblocksandgroupsofearthquakesisdiscussedinthispaper.Theresultsshowthatearthquakesingroupsoftenoccurredatoneorseveralblockboundaryfaults.Thereleasedelasticstrainenergyisbuiltupinthesameperiodsandaroundblocks.Itmeansthatstrongearthquakesingroupsaremainlycausedbymovementofblocks.Fourtypesofblockmovementareidentifiedbasedongroupearthquakes:movementalongasingleboundaryofablock(oracombinedblocks),movementofasingleblock,movementofmulti-blocks,andmovementinblockinteriors.IfweconsiderdistributionofallstrongearthquakesoccurredintheChinesemainland,themovementalongasingleboundaryofablockismorepopularoneinducingstrongearthquakes.Butifweonlyconsiderearthquakesingroupsratherthansingleearthquakesthemovementofablockdominatesamongfourmodes.StatisticswithrespecttogroupearthquakesshowthattheTaihangshanmountainandtheNorthChinablockaremuchactiveintheeasternpartofChinesemainland,andinwesternpartofChinesemainlandtheactiveblocksareSichuan-YunnanandtheKunlun-Songpanones.

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  • 简介:Asaconvenientpassengertransitfacilitybetweenfloorswithdifferentheights,escalatorshavebeenextensivelyusedinshoppingmalls,metrostations,airportterminals,etc.Comparedwithotherverticaltransitfacilitiesincludingstairsandelevators,escalatorsusuallyhavelargetransitcapacity.Itisexpectedtoreducepedestriantravelingtimeandthusimprovethequalityofpedestrian'sexperiencesespeciallyinjammingconditions.However,itisnoticedthatpedestriansmaypresentdifferentmovementpatterns,e.g.,queuingoneachstepoftheescalator,walkingontheleft-sideandmeanwhilestandingontheright-sideoftheescalator.Thesedifferentpatternsaffecttheactualescalatortrafficvolumeandfinallythepassengerspatiotemporaldistributionindifferentbuiltenvironments.Thus,inthepresentstudy,amicroscopiccellularautomaton(CA)simulationmodelconsideringpedestrianmovementbehavioronescalatorsisbuilt.Simulationsareperformedconsid-eringdifferentpedestrianmovementspeeds,queuingmodes,andsegregationonescalatorswithdifferentescalatorspeeds.Theactualescalatorcapacitiesunderdifferentpedestrianmovementpatternsareinvestigated.Itisfoundthatwalkingonescalatorswillnotalwaysbenefitescalatortransitvolumeimprovement,especiallyinjammingconditions.

  • 标签: CELLULAR AUTOMATON PEDESTRIAN MOVEMENT ESCALATOR capacity
  • 简介:1IntroductionMechanismsoftheearth’shardcrust(crustobody)movementhavebeenhypothesizeda8tide,expansionandcontractionofthccarth,mantleconvection,rotationoftheearth,etc’,whicharenotcloselyreasoneddespiteofthesupportofsomegeologica1facts’Anothcrhypothesis-themantlecreep-flowandgeothermalencrgyconccrvatio

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  • 简介:Thispaperusesmulti-quadricequationsinterpolationtoes-tablishawidelycoveredandvaluablespeedfieldmodelofChina,withwhichthehorizontalcrustalmovementpatternsareobtained.Thepresent-dayverticalcrustalmovementvelocityim-ageofChinaisalsoexpressedbyGPSobservations,fromwhichwecanknowtheverticalcrustalmovementpatterns.

  • 标签: 地壳运动 GPS 曲面模型 中国大陆
  • 简介:Thebreakdownandfoundationofgeostrophicbalanceisoneoftheimportantmovementsinthemid-andhigh-latitudeatmosphereandoceans.Inthetropicalarea,thevalueofCoriolispa-rameterissosmallthatitisdifficulttosatisfythebi-geostrophicequilibriumbetweenthepressureandvelocityfields.However,inthetropicalarea,thezonalvelocityofsomemotionsintheatmo-sphereandoceansislarge,sotheCoriolisforceisnotsmall,geostrophicbalancecanexistinzonaldirection,i.e.semi-geostrophicbalance.Furthermore,inthedominantareaofHadleycirculationintheatmosphereortheareaneartheoceanmeridionalboundary,themeridionalvelocityislarge,sogeostrophicbalancecanalsoexistinmeridionaldirection.Inthispaper,theprocessofthedis-persionofinertialgravitywaveandthefoundationofsemi-geostrophicbalancearefirstdiscussed.Second,theadjustmentprocessbetweenthevelocityandpressurefieldsafteradaptationisalsoviewed,andthescalecriterionofthesemi-geostrophicadaptationisdiscussed,i.e.forthemotionwithmeridionalscalegreaterthantheequatorialRossbyradiusofdeformation,thevelocityandpressurefieldsafteradaptationchangetofittheinitialpressurefield;onthecontrary,thefieldschangetofittheinitialzonalvelocityfield,andthestrengthofthefieldsafteradaptationdependsonthezonalscale.

  • 标签: dispersion of INERTIAL GRAVITY wave semi-geostrophic
  • 简介:Thedepletionrateofphosphateinthesoil-rootinterfacezoneincreasedalongwithgrowthandphosphateuptskeofwheatormaize,whichindicatedthatthephosphatedistributioninsoilneartherootsurfaceagreedwellwiththephosphatemovementinrhizosphereandphosphateuptakebyplant,Therelativeaccumulationzoneofphosphatewithin0.5mmapartfromtherootsurfacedevelopedatthe15thdayorsoaftercultivatingwheatormaizesincetherootphosphatesecretionincreasedgraduallyinthisstage.Thephosphatedistributioninthesoil-rootinterfacezoneagainstthegrowingtime(t)andthedistancefromtherootplane(x)couldbedescribedbythenon-linearregressionequationwiththethirdpowersofxandt.

  • 标签: 土壤根-界面区 磷分布 磷迁移 动力学
  • 简介:一个明确的有限差别方法被执行在粘弹性的地点的地震反应上评估地形学效果的意义。真实accelerograms和地狱形状推动小浪,到来的波浪的光谱性质上的峡谷和入射角的斜坡角度都详细被讨论。结论证明地志的因素和这个事件的方向的存在不仅显著地飘动影响一个地点的山峰地面加速,而且在事件波浪的方向上影响到来的波浪,和效果的光谱性质是特别显著的。学习也发现在波浪运动的有限元素模拟与推动小浪的输入分析光谱性质是合理的。

  • 标签: 有限元模拟 光谱 地形学 地震
  • 简介:AbstractBackground:Reports evaluating the efficacy of transcranial sonography (TCS) for the differential diagnosis of Parkinson disease (PD) and other movement disorders in China are scarce. Therefore, this study aimed to assess the application of TCS for the differential diagnosis of PD, multiple system atrophy (MSA), progressive supranuclear palsy (PSP), and essential tremor (ET) in Chinese individuals.Methods:From 2017 to 2019, 500 inpatients treated at the Department of Dyskinesia, Beijing Tiantan Hospital, Capital Medical University underwent routine transcranial ultrasound examination. The cross-sections at the midbrain and thalamus levels were scanned, and the incidence rates of substantia nigra (SN) positivity and the incidence rates of lenticular hyperechoic area were recorded. The echo of the SN was manually measured.Results:Of the 500 patients, 125 were excluded due to poor signal in temporal window sound transmission. Among the 375 individuals with good temporal window sound transmission, 200 were diagnosed with PD, 90 with ET, 50 with MSA, and 35 with PSP. The incidence rates of SN positivity differed significantly among the four patient groups (χ2 = 121.061, P < 0.001). Between-group comparisons were performed, and the PD group showed a higher SN positivity rate than the ET (χ2 = 94.898, P < 0.017), MSA (χ2 = 57.619, P < 0.017), and PSP (χ2 = 37.687, P < 0.017) groups. SN positivity showed a good diagnostic value for differentiating PD from the other three movement diseases, collectively or individually. The incidences of lenticular hyperechoic area significantly differed among the four patient groups (χ2 = 38.904, P < 0.001). Next, between-group comparisons were performed. The lenticular hyperechoic area was higher in the PD group than in the ET (χ2 = 6.714, P < 0.017) and MSA (χ2= 18.680, P < 0.017) groups but lower than that in the PSP group (χ2 = 0.679, P > 0.017).Conclusion:SN positivity could effectively differentiate PD from ET, PSP, and MSA in a Chinese population.

  • 标签: Transcranial sonography Movement disorders Parkinson disease
  • 简介:Purpose:Toidentifythesocial-ecologicalcorrelatesassociatedwithfundamentalmovementskillsatthechild,family,andenvironmentlevelsinyoungchildren.Methods:Preschoolchildrenfrom4ColoradoHeadStart/preschoolcenterswererecruitedfrom2010to2012.Twohundredtwenty-eightchildren(128girls;age=56.08±4.09months;bodymassindex(BMI)z-score=0.53±1.12(mean±SD);42.1%Hispanic/Latino)and159familieswereincludedinthefinalanalysis.Children’sperceivedcompetenceandfundamentalmovementskillswereassessedviathePictorialScaleofPerceivedCompetenceandSocialAcceptanceandtheBruininks-OseretskyTestofMotorProficiency,2ndedition.Dataonthenumberofchildreninthefamily,parentage,BMI,education,employmentstatus,familyincome,perceptionofchildcoordination,andhomephysicalactivityenvironmentwerecollectedviaaquestionnaire.LinearregressionsadjustedforchildBMI,age,sex,andschoolsitewereperformedateachlevel.Results:Childperceivedcognitivecompetencewaspositivelyassociatedwithlocomotorskills(p=0.04;adjustedR2=0.035)andobject-controlskills(p=0.003;adjustedR^2=0.083)atthechildlevel.Parenteducation,BMI,andperceptionofchildcoordinationwerepositivelyassociatedwithlocomotorskillsandexplained8.8%ofvariance,butonlyparenteducationwassignificant(p=0.04)atthefamilylevel.Inaddition,physicalenvironmentwaspositivelyassociatedwithlocomotorskills(p=0.02)andexplained5.5%ofvarianceattheenvironmentlevel.Conclusion:Social-ecologicalcorrelatesassociatedwithyoungchildren’sfundamentalmovementskillsaremultidimensionalanddifferaccordingtoskillcategoryatthechild,family,andenvironmentlevels.

  • 标签: Activity environment FUNDAMENTAL MOVEMENT SKILLS Parent
  • 简介:我们核心之一与使用眼睛的人的计算机相互作用(HCI)系统有关发出的工作地址作为输入凝视。这个问题是在任何眼睛存在的传感器,传播和另外的延期基于追踪者的系统,减少它的表演。延期效果能被眼睛运动轨道的精确预言补偿。这篇论文介绍使用人的视觉系统的解剖性质预言眼睛运动轨道的人的眼睛的一个数学模型。眼睛数学模型被转变成一种Kalman过滤器形式在所有眼睛运动类型期间提供连续眼睛位置信号预言。在这篇论文介绍的模型使用在转变在之间期间采用的大脑茎控制性质快(急束勒马)并且慢(固定,追求)眼睛运动。在这篇论文介绍的结果显示在一种Kalman过滤器形式的建议眼睛模型改进眼睛运动预言的精确性并且能够即时表演。除了HCI,有直接眼睛的系统凝视输入,建议眼睛模型能立即被申请在即时凝视偶然的系统的bit-rate/computational减小。

  • 标签: 人机交互 计算机视觉 图像处理 图像增强
  • 简介:Whenasurfaceisilluminatedbylaser,thefieldofdiffusingreflectivelightcanbedescribedbyFresnel-KirchhoffintegrationintheregionofFresnel.Ifthecorrelation,beforeandafterthechangeofintensityfield,isanalysedbystatisticalmethod,threegoverningequationsforvariationsofintensityfieldandspecklemovementformulascanbeobtained.Intheseequations,thesurfacemotion,deformationandwavelengthchangeareallconsideredtocausethespecklemovement.

  • 标签: LASER SPECKLE SPECKLE INTERFEROMETRY SPECKLE METROLOGY
  • 简介:CrustaldeformationinthenorthernpartofNorthChinaassociatedwithZhangbeiearthquakeisanalyzedusingGPSdatacollectedduring1992,1996and1999,precisere-levelingdatacol-lectedduring1992,1998and2000,andINSARresult(September22,1997-May6,1998).Theresultsindicate:①Theverticaldeformationisnotremarkablesince1992.TheverticalcrustaldeformationinthecentralandnorthernpartofNorthChinainrecent10yearsisofin-heritance.Thescopeofthesignificantdeformationis15km×15kmwithamagnitudeof250mmwhentheeventoccurred.②ThehorizontaldeformationisnotremarkableinanyunitofNorthChina.③Beforeandaftertheevent(1992-1996and1996-1999),thereiskinematicchangeofhorizontalmotionbetweendifferentunits.TheactivitymodealongYinshantectoniczonechangedfromrelativestaticstatetoleft-lateralstrikeslip;ThedominantextensionalmovementalongShanziriftzonechangedtoright-lateralstrikeslip;Yanshantectoniczonechangedfromleft-lateralstrike-slipwithextensiontoleft-lateralstrikeslip;Yanshan-Hebeitransitionalzoneformedbeforetheeventdisappearedaftertheevent.④Thescaleofthedeformationiscloselyrelatedtothephysicalpropertyofmediaandgeologicalstructureenvironment.Furtheranalys-isindicatesthat①ZhangbeiearthquakedoesnotmeanthattheearthquakeactivitybeginstobestrengthenedinNorthChina;②Thecrustalmovementisnormalatpresent;③Nextstron-gerearthquakeinNorthChianmightbelocatedinYanshantectoniczone,especiallyatitsbothends,andShanxitectoniczone.

  • 标签: 中国北部 张北地震 地壳运动 GPS 全球定位系统 地震活动性
  • 简介:Grounddeformationmaybecausedbycrustalmovementandnon-crustalmovement.Thenon-crustalmovementsincludethosecausedbytemperature,rainfall,groundwater,etc.Deformationcausedbycrustalmovementincludesseismogenicdeformation(thatappearingintheprocessofearthquakepreparationandthatdirectlycausedbytheearthquake)andgeneraltectonicactivities.Thekeypointinthestudyoftherelationshipbetweengrounddeformationandearthquakesishowtoeliminateinformationofdeformationcausedbynon-crustalmovementandpermanent(orslow)tectonicdeformationinobserveddata.InthispaperananalysisismadeontheshortlevelingdatarecordedatDahuichangDeformation-ObservingStation,Beijing,for22years(1970-1991)byusingtheLMSalgorithmmethodafterlateraladaptivefilteringofthemoderndigitalsignalprocessingtechnique.Eliminatingtheapproximateannualvariationindeformationcausedbynon-crustalmovementsuchastemperature,rainfall,groundwater,etc.,aunifiedstandardis

  • 标签: adaptive FILTERING SEISMOGENIC DEFORMATION PERMANENT TECTONIC
  • 简介:阶段地水晶(陆军)模型被用来模仿premelting脱臼运动对称当系统温度在时,在紧张行动下面倾斜谷物边界(STGB)远非,到融化的融化的点和结束分别地指。结果证明当premelting温度被接近到,本地premelting发生包围脱臼从在温度下面。STGB的premelting脱臼能在紧张行动下面滑行,并且premelting区域是为脱臼滑行的一个同伴。STGB腐烂的过程以二个高温度条件是很类似的。当premelting介绍,它减少为脱臼的滑行抵抗并且导致脱臼的一个更快的运动,并且也在STGB的腐烂过程期间引起系统的更多的精力减小。尽管有把紧张用于这些,premelting在STGB的整个腐烂过程取样,premelting脱臼区域显然不发展并且延长。这显示外部紧张行动不在高温度支持premelting,并且不能导致更多的premelting脱臼,它能在脱臼展览附近被欠到premelting阶段像液体的性质并且到容易滑行并且放松紧张精力的premelting脱臼;这与实验和分子的动力学的结果一致。

  • 标签: 位错反应 晶界 晶体 相场 温度条件 移动