简介：HowSpringFestivaliscelebratedAlthoughthedateoftheSpringFestivalwasswitchedfromthebeginningofspringtothefirstdayofthefirstlunarmonth,themainwaysofcelebratingit,frombygonedays,remainpopular.

简介：Throughthesinusoidloadingdynamictriaxialtest,theliquefactionpropertyofsaturatedloessandsandselectedfromacivilairportofLanzhou,Gansuisexamined.Basedonthelaboratoryresults,acomprehensiveassessmentontheearthquakeliquefactionpotentialoftheloessandsandisgiven,usingtheliquefactionresistanceshearstressmethodandtheresultsofseismichazardassessment.Itisfoundthatundertheeffectofgroundmotionwithexceedanceprobabilityof10%within50years,theloessinthestudyismoresusceptibletoliquefactionthansand.

简介：

简介：

简介：ＧＲＥＥＮＩＮＧＴＨＥＬＯＥＳＳＰＬＡＴＥＡＵ：ＦＯＵＲ“ＧＯＬＤＥＮＦＬＯＷＥＲＳ”￥ＢｙＺｈｕＪｉａｎＷａｎｇＭｉａｏｘｉａ，ａｒｅｓｉｄｅｎｔｏｆＱｉａｏｔｏｕＶｉｌｌａｇｅｉｎＺｈｉｙａｎｇＴｏｗｎｓｈｉｐ，ＳｈａａｎｘｉＰｒｏｖｉｎｃｅ，ｉ...

简介：在这介绍了纸试验性的学习的结果和沉淀特征的分析不过与泥土粒子的不同内容从土壤样品被获得实验室扫描的动态triaxial测试，激光粒子尺寸分析，化学分析和电子显微镜。由获得的数据的比较，下列结论被抽出：(1)黄土的稳定性与泥土的不同内容变化；(2)关系在之间动态砍力量和泥土粒子不单调，却寓言；(3)在一样的巩固比率，粘土似的黄土是最弱沉淀抵抗当泥土粒子内容在之间时16%17%。

简介：ThispapersummarizesasetofinterpretationtechnologiesforMesozoicsandstonereservoirpredictionintheLongdongloessplateau,suchasseismicsequenceprocessingandinterpretationbasedongeneralizedStransform,theerodedpaleo-geomorphologyinterpretationofthetopoftheTriassicandavarietyoflateralreservoirpredictions.Theeffectsofemployingthesetechnologiesarecomparedandanalyzed,aswell.TheresearchresultsshowthatseismicsequenceprocessinginterpretationtechnologybasedongeneralizedStransformcandistinguish3ms(aboutthethicknessof6m)sequenceinterface.ConsequentlythetechnologycanascertainthedistributionofasandbodyoftheformationCh8andexpandtheexplorationareaoftheXifengoilfieldintheLongdongarea.

简介：摘要近年来随着GPS技术的成熟，通过GPS技术进行测绘作业得到了广泛的应用，目前如何利用GPS的大地高信息得到高程信息是测绘界研究的重点内容之一，本文以多项式曲面拟合为例，研究了多项式曲面拟合的基本原理，并通过案例做了详细的分析和论证。

简介：

简介：在深黄土土壤存储的水是在黄土高原的半干旱的区域调整植被生长的最重要的资源之一，但是种灌木和森林经常破坏自然的水周期并且接着影响植物生长。这研究的目的是在土壤潮湿和它的内部年度的变化上检验主要植被类型的效果。在六植被的010m深度的土壤潮湿打字，即，庄稼，草，锦鸡儿属植物的种的灌木，侧柏的种的森林，松和松和侧柏的混合在2001，2005和2006被测量。在农田的大约03m和另外的植被类型的大约02m的土壤潮湿内部每年在年度降水上改变了依赖者，但是在这些深度下面内部每年是稳定的。在02m，农田的土壤潮湿比所有另外的植被类型的那些显著地大，并且在另外的植被类型之中没有重要差别。在210m，农田和草地之间没有重要潮湿差别，但是在他们俩下面的土壤潮湿比种的灌木和森林的那些显著地高。种的灌木和森林弄空在2m到或近永久的枯萎点下面的土壤潮湿，并且在森林类型之中没有重要潮湿差别。锦鸡儿属植物灌木的土壤潮湿是比森林的那些显著地低的，但是绝对差别是很小的。这研究的结果含有种的灌木和森林深弄空土壤潮湿到他们能提取到的最低限制并且他们为蒸发主要靠现在的年降水生活了。

简介：

简介：

简介：探讨用最小二乘法解决空间直线方程的拟合问题.先拟合三个直角坐标系中的投影直线,再通过投影直线求出空间直线方程,并对拟合出来的三个不同的直线方程进行比较,选择最佳拟合方案.

简介：Mineralogical,physicalandchemicalanalysesofthesoilsderivedfromXiashuloesswerecarriedout.Theprimarymineralsofthesesoilswerefoundtobemainlycomposedoflightminerals,suchasquartz,feldsparandmica,withtracesofheavyminerals.Clayminerals,morecomplicateincomposition,weredominatedbyhydromica,accompaniedbysmectite,vermiculite,chlorite,kaolinite,2:1/1:1randomlyinterstratifiedmineralsandsmallamountsofquartz,goethite,lepidocrociteandhematite,Claymineralswerecharacterizedbylowcrystallinityandfineparticlesize.Inlightofthequartz/feldsparsratioofthe0.01-0.05mmsiltfraction,andtheclaymineralcomposition,thefreenessofironoxide,andthesilica/sesquioxideandsilica/aluminaratiosin<0.002mmclayfraction,itisconcludedthattheweatheringintensityofthesesoilswaslowerthanthoseofredsoilandyellowearth,buthigherthanthatofbrownearth,andthatthesoilallitization,depotassicationandhydroxylationofclaymineralsincreasedfromwesttoeastandfromnorthtosouthgeographically.However,thisgeneraltendencedidnotcoincideexactlywiththegradualalterationofthegeographiccoordinates,andinsomeplaces,areversetendencyalsoappeared,whichcouldbeattributedtotheinfluenceofsomesoilformingfactorssuchasparentmaterialandmicrotopography.

简介：目前，在小分水岭规模的土地使用优化是关键措施控制土壤侵蚀，恢复eco环境并且改进农民黄土高原上的生活标准，中国。基于1966的陆地使用调查地图，1988，1997，

简介：RillerosionisadominantprocessofmorphologicalevolutionoftheLoessPlateauinChina,anddeliveriesmuchloesssedimenttorivers.Datafromtwoflumeexperimentsconductedonthebareandglass-coveredbedsindicatedthatthefillflowdevelopsintoaseriesofrollingwaves.Theshearstressontherillbeddistributesunevenlybothspatiallyandtemporally.Anewmethodbasedontheenergyconservationlawisproposedinthisstudy.Thustherelationshipbetweentherunoffenergyconsumptionfromtheinteractionofwaterflowandslopebedandsoildetachmentisformulated.Theresultsshowedthatthedataforthesoildetachmentrateonslope(Dr)andtheenergyconsumptionofrunoff(E1)fittedwellwithnewly-developedfunction.Therillerosionoccurswhentherunoffenergyconsumptionexceedsacriticalvalue.

简介：在这篇论文，在沉积的变化在中国在黄土高原在Kuye河里从1955～2006搬运超过51年被估计。给影响沉积产量和沉积运输的因素调音，例如降水深度，排出，并且人的活动被学习。为了在这在沉积产量调查变化，分水岭，沉积集中上的趋势分析，降水深度，和分泌物被进行。在2个气候车站(CS)的降水深度，以及分泌物和沉积在3点搬运估计车站(GS)被用来在Kuye河里估计沉积运输的特征。流量模量(每统一区域定义为年度平均分泌物，L/(s.km2))并且沉积运输模量(每联合起来定义为年度推迟的沉积运输区域，t/(年km2))在这研究被介绍为这个分水岭在流量和沉积产量估计变化。结果证明最高平均的月刊在Kuye河里在学习时期期间排出是在有一期平均月刊的8月的66.23m3/s88.9kg/m3的沉积集中。然而，最高平均的每月的沉积集中在Kuye河里的学习经期期间是125.34kg/m3并且发生在7月，它有多的42.6m3/s的平均分泌物不到在8月的平均每月的分泌物。在在Kuye河里的WenjiachuanGS的流量模量和沉积运输模量有，这被发现一清楚向下趋势。在到8月的从7月的夏天季节期间，在WenjiachuanGS的沉积运输模量在黄河上比在Toudaoguai和LongmenGS的那些高得多。容易在Kuye河分水岭和稀少的植被的erodible黄土为从Kuye河分水岭的极其高的沉积收益负责。Kuye河里的推迟的负担的谷物尺寸分发的分析被介绍。Kuye河里的推迟的负担的平均每月中部的谷物尺寸在2月是最大的然后减少直到6月。在7月，推迟的负担的平均每月中部的谷物尺寸接近另一座山峰并且减少直到9月。然后，推迟的负担的中部的谷物尺寸开始增加直到下列年的2月。然而，在在Toudaoguai和LongmenGS的黄河的推迟的负担的平均每月中部的谷物尺寸在早夏天和迟了的秋天之间

简介：Liquefactiontestingatasaturatedloesssitewasperformedunderthesimulatedearthquakegroundmotioninducedbyartificialexplosionswithmicro-timeintervals.Thetimehistoriesofgroundacceleration,porewaterpressureandtheultimatevalueofresidualstrainwererecordedandmeasured.ThemodifiedFEQdraincomputationsoftwarewasusedtoanalyzetheliquefaction.Boththetestandtheanalysisconfumtheobjectiveoccurrenceofloessliquefaction.Furthermore,thereliabilityofthemethodoftheloessliquefactionanalysisbasedonFEQdrainandthemodelofporewaterpressuredevelopmentofsaturatedloessareexamined.

简介：ThepaperanalyzesthesedimentsourceofwatershedbymeansofstudyingwatershedinwestemShanxioftheLossesPlateau.Onthebasisofwatershedsclassification,7typicalwatershedswerechosenandobservedfor11years.Theresultshowsthatthesedimentatthesmallwatershedmainlycomesfromgullies,whichis60%ofthetotalsediment.Erosionmodulusofvalley(includinggullyhead,gullybed,valleyside)is1.28-2.48timesasthatoftheareabetweenchannels(includinghillslopeandmoundoftheLoessPlateau).Themainsedimentsourceofslopeerosioniscultivatedlandonslopewithoutwaterandsoilconservationmeasures.

简介：Unsaturatedradionuclidemigrationexperimentswereconductedinapitinsidethetestinghall.Severaltypesofradionuclideswereusedintheexperiments.Tritiumwasusedasatracerforwatermovementinunsaturatedloess.Otherkindsofradionuclideswerealsousedinordertoobtainfundamentalparametersforradionuclidemigrationsothatfurtherenvironmentalassessmentoflow—levelradioactivewastedisposalcanbecar-riedout.Mechanismsgoverningunsaturatedflowinloess,thatis,principlesofone—waylateralflow,arepresentedqualitativelyinthispaper.Andacontinuumone—dimensionalmodelforradionuclidemigrationtestingisdevelopedbasedontheex-perimentsconductedundertheparticularconditionsatthetestsite.Thedatameasuredfromthetestswerecomparedwithsolutionsofthisone—dimensionalmodel.Resultsshowthatthismodelisfeasibleformodelingradionuclidemigrationinunsaturatedloess.