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简介：Heightextractionforbuildingsisafundamentalstepof3Dscenereconstructioninmanyvirtualrealityapplications.Inthispaper,weproposeanautomaticmethodtoextracttheheightofbuildingsinhighresolutionsatelliteimagerybasedonthelengthofshadow.Takingintoaccountthelimitationoftraditionalalgorithms,wemakeuseoftheboundaryinformationofabuildingtofacilitatedetectingandmatchingtheshadowregionswithhigheraccuracy.Then,weintroduceashadow-castmodeltocorrecttheshadowlocationinoursystem.Theexperimentalresultshowsthatwhenextractingtheheightofbuildingsfromcomplexurbanregions,ourmethodhasbetteraccuracy.

简介：Ｓｐａｔｉａｌａｎｄｔｅｍｐｏｒａｌｖａｒｉａｔｉｏｎｏｆ　ｇｒａｖｉｔｙ　ｆｉｅｌｄｉｎｔｈｅｃａｐｉｔａｌｒｅｇｉｏｎＣｈａｎｇ－ＣａｉＨＵＡ；（华昌才）ＹｏｎｇＧＵＯ；（果勇）Ｄｕａｎ－ＦａＬＩＵ；（刘瑞法）ＧａｎｇＸＩＡＯ；（肖钢），Ｊ．Ｔ．...

简介：这四个词均可译为“地区、地带”，但用法上有区别：

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简介：GranitoidsarewidelyspreadintheNanlingRegionofChina.FourrockbodiesintheregionthebeenstudiedfortheirREE,Rb,Sr,BaandScdistributions.Thefourrockbodiesoccurredindifferentlocationsandarecharacterizedasbeingdifferentinageandtype.Therocktypesarepresentedasfollows:Qinghumonzonite,Guangxi;Fuxigranodiorite,Guangdong;Jiufengmonzoniticgranite,Hunan;ZudongK-feldspargranite,Jiangxi.FromthemajorandtraceelementdistributionsinthesegranitoidsitisclearlyshownthatRb/SrratiosintherockstendtoincreasewithincreasingSiO2contentanddifferentiationindex(DI),butLREE/HREE,La/YbandK/Rbratiostendtodecrease,suggestingacorrelationbetweentraceelementdistributionandmajorelementcompositionforthegranitoids.Thedistributioncharacteristicsoftraceelementsineachoftherockbodiesaredescribedindetail.FromthecomparativeanalysisoftheQinghumonzoniteandFuxigranodioriteitisevidencedthattheREEdistributioniscloselyrelatedtothesequenceofcrystallizationfortheminerals,andalsotothepetrochemicaltypesofthesegranitoidsinadditiontotheircrystalchemistry.

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简介：TheseismotectonicenvironmentandseismicactivityinSouthwestChinaregionwerestudiedbasedonnewdataandnewresultsobtainedduringtheEighthandNinthFive-YearPlans,theseismicareasandzonesandpotentialseismicsourcezonesweredetermined.andtherelationbetweenseismicactivityparametersandgroundmotionattenuationwasdetermined.FinallytheseismicgoundmotionzoningmapsofthePangxiregionwascompiledbyusingthemulti-parameterandmulti-schememethod.

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简介：XishuangbannaofYunnanProvinceisafamoustropicalfoggyregion.AfieldexperimentwascarriedoutfromNovember23to30of1997duringwhichfogsoccurredregularlyeveryday.Inthepaperthecharacteristicsofmacrostructureoffogareanalyzedandthephysicalprocessesofformationanddissipationoffogarestudied.TheresultsshowthattheXishuangbannavalleyfogformsfirstlyintheloweratmospherewithtwo-layerstructuresandthendevelopssuddenlyintheverticaldirectionafterreachingtheground.Furthermore,thevegetationeffectontheformationanddissipationoffogisdiscussedspecially.

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简介：TheNanlingregionisoncofthcmostimportantpartsofthewcstPacificmetallogeniczone,andaworld-famousconcentratedregionofnon-ferreousmetals,raremetalsandrarecarthelenlentsorede-posits.Formationofalargeamountofmctallicorcdepositsinthcregionisconccntratedinthcdiwastagc.Forcxplainingformationofthomctallicorcdc

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简介：Throughoneandhalfyearcontinuousin-situmeasurements,thedistributionsandvariationsofsurfaceozoneanditsprecursorsatatypicalmixedagriculturalandmetropolitanarea-Changshu,YangtzeDeltaregion,werestudied.Thepreliminaryanalysisontheconcentrationlevelsandvariationsofsurfaceozoneindicatedtheobviousseasonalanddiurnalcyclesduringtheexperiment.Thehourlyaveragedconcentrationsofsurfaceozonewerehigh,inabout17%oftotalvalidhoursthesurfaceozoneconcentrationexceeded50ppb,andin22daysthehourlyaveragedozoneconcentrationwasgreaterthan100ppb.Therewereabout40%ofthedaysinthatthedailymaximum8-hourozoneconcentrationwasgreaterthan50ppb.Thedayswithdailymaximum8-hourozoneconcentrationgreaterthan80ppbwereabout33daysthataccountedforabout8%oftheobservationaldays.Thevariationsof5-daymovingaveragedozoneconcentrationsdependedbothontheweatherconditionsandonthechangesofozoneinbackgroundatmosphere.Photochemicalprocesshadthesignificantimpactsonozoneproductions.

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简介：SinceAugust2007,whenRussiasetitsnationalflagontheseabeddirectlyunderthegeographicNorthPole,theArcticissueswereonceagainbecamethefocusoftheworldattention.Russia’smovehastriggeredarangeofdeclarationsonterritorialsovereigntybythecountriesalongtheArcticrim,givingrise

简介：Thispaperselectstherecordsof7,412earthquakes,eachrecordedbymorethan10stationsinYunnanbetween2009and2014toacquirethetraveltimecurves.Meanwhile,forimprovingprecision,linearanalysis,reducedtraveltimecurveandintervalstabilityanalysisareconductedfocusingontherecordsof83earthquakeswithML≥3.0recordedeachby≥80%ofthestations,andbycombiningpredecessors??researchresults,theinitialcrustalvelocitymodelofthestudyareaisobtained.Byselecting200earthquakeswithM≥3.0occurringinYunnanbetween2010and2014,usingtheHyposatbatchlocationprocessingmethodtoiteratetheinitialvelocitymodel,andperformingfittingtoSwaveslayeredvelocitystructure,weobtainthecrustalvelocitymodelfortheYunnanregion,namely,the2015Yunnanmodel,with:vP1=6.01km/s,vP2=6.60km/s,vPn=7.89km/s,H1=20km,H2=21km,vS1=3.52km/s,vS2=3.86km/s,vSn=4.43km/s.AnalysisonearthquakerelocationsbasedonthenewmodelshowsthatmostearthquakesoccurringinYunnanareatadepthof10km-20kmoftheuppercrust.TheMarch10,2011MS5.8YingjiangandAugust3,2014MS6.5Ludianearthquakesarerelocated,andthefocaldepthsdeterminedwiththenewmodelarerespectivelyclosetotheprecisepositioningresultandhypocentraldistancetothestrongmotionstationsattheepicenters,indicatingthatthenewone-dimensionalvelocitymodelcanbetterreflecttheaveragevelocitystructureofthestudyarea.

简介：有卫星数据集的表面土壤水分蒸发蒸腾损失总量(et)的评价是在气候变化，灾难在西藏自治区域(tar)监视和水蒸汽和精力的发行量的理解的主要题目之一。这研究在1月11日选择卫星图象，在2010的4月6日，7月31日和象冬季，春天，夏天和秋天的代表的10月19日分别地，与潜在的土壤水分蒸发蒸腾损失总量(宠物)和从Penman-Monteith(下午)方法导出的et一起基于表面精力平衡系统(SEBS)估计每日的表面et的分发。结果如下被获得。(1)et和宠物的季节的分发基本上从东南部分减少到焦油的西北部分。尽管et和宠物有类似的空间分布，仍然有一些差别估计极端特别在焦油的中间、东南的部分珍视最大的价值。不管我们采用了什么样的方法，et和宠物的最大的价值总是出现在夏天，当那在冬季是最小的时，由秋天或春天列在后面。(2)在et的评价当模特儿以便更好理解SEBS的精确性，我们从从下午方法获得的SEBS和ET比较了ET。结果证明从SEBS的ET能估计实际et的变化趋势，但是它稍微总体上低估或过高估计et的价值，特别为有厚森林的那些区域。(3)规范的差别植被索引(NDVI)的空间分发从东南部分展出一个减少的趋势到显示在et和植被索引之间的分布的显著一致性的tar的西北部分。当时，et与在不同季节的NDVI，最小，平均数，最大的空气温度和阳光持续时间有关断然好否定地在夏天与降水，相对湿度和风有关加速。

简介：ＴｈｅＳｉｔｕａｔｉｏｎｉｎＡｓｉａ－ＰａｃｉｆｉｃＲｅｇｉｏｎａｎｄＣｈｉｎａ＇ｓＰｏｌｉｃｙ￥ＺｈａｎｇＸｉａｎｇｓｈａｎ（ＶｉｃｅＰｒｅｓｉｄｅｎｔｏｆｔｈｅＣｈｉｎｅｓｅＡｓｓｏｃｉａｔｉｏｎｆｏｒＩｎｔｅｒｎａｔｉｏｎａｌＵｎｄｅｒｓｔａｎ...