简介：世界介绍需求因为油和气体为超过60%全球油和煤气的供应仍然在一个快速的生长时期，和传统的油和煤气的资源报道。美洲是第二最大的生产和液体的消费中心造成的世界，并且也是世界最大的天然气制片人。在2016，美洲有853亿大量证明的油储备和证明天然气储备的18.7万亿m3，它说明35.4%世界和10.0%分别地总计储备。它生产了油的1267.1山和天然气的11254亿m3，它分别地说明28.9%世界和31.7%总数生产。原油和天然气储备主要在美国，加拿大和委内瑞拉被散布。美国是在页岩气体探索和开发的最早、很成功的国家，并且它的页岩气体在南部、中央、东方的美国被集中，包括Marcellcus页岩，Barnett页岩，EagleFord页岩，Bakken页岩，Fayettevis页岩，Haynsvill页岩，Woodford页岩和Monterey/Santos页岩。在美洲的潜在的油和煤气的资源主要在西方的加拿大沉积的盆在Williston盆，主导的stratigraphic陷井和很少结构的陷井在北方斜坡盆，古生代的Madsion组白云石和石灰石的中间上面的侏罗记斜坡免职在背斜和stratigraphic陷井被集中，始新世structural-stratigraphic烃联合，结构不顺从的陷井和结构的烃联合，和上面的Miocen另外，地震subsalt成像技术的突破使subsalt成为东方Barzil的深海的海区域重要的油和煤气的潜在的区域。

简介：Thereweredifferentbiogeographicaltintinnidsintheoceans.Knowledgeoftheirdistributionpatternandmixingwasimportanttotheunderstandingofecosystemfunctions.YellowSea(YS)andBohaiSea(BS)weresemi-enclosedseasinfluencedbywarmwaterintrusionandYScoldbottomwater.TheoccurrenceoftintinnidsinYSandBSduringtwocruises(summerandwinter)wereinvestigatedtofindout:i)whetherwarm-watertintinnidsappearedinYSandBS;ii)whetherborealtintinnidsappearedinhighsummer;iii)thecoreareaofneritictintinnidsandiv)howthesedifferentbiogeographicaltintinnidsmixed.Ourresultsshowedthattintinnidcommunitywasdominatedbyneritictintinnid.Weconfirmedtheoccurrenceofwarm-watertintinnidsinsummerandwinter.Insummer,theyintrudedintoBSandmainlydistributedintheupper20mwhereYellowSeaSurfaceWarmWater(YSSWW)developed.Inwinter,theywerelimitedinthesurfacewaterofcentraldeepregion(bottomdepth>50m)ofYSwherewereaffectedbyYellowSeaWarmWater(YSWW).BorealtintinnidsoccurredinYSinhighsummer(August)andinwinter,whiletheywerenotobservedinBS.Insummer,thehighestabundanceofborealtintinnidsoccurredinYellowSeaBottomColdWater,indicatingthepresenceofanoversummeringstock.Inwinter,theywereconcentratedinthenorthofYSWW.Vertically,neritictintinnidsabundancewashighinthebottomlayers.Horizontally,highneritictintinnidsabundanceinbottomlayersoccurredalongthe50misobathcoincidingwiththepositionoffrontsystems.Frontsystemswerethecoredistributionareaofneritictintinnids.Highabundanceareasofwarm-waterandborealtintinnidswereclearlyseparatedverticallyinsummer,andhorizontallyinwinter.Highabundanceofneritictintinnidsrarelyoverlappedwiththatofwarm-waterorborealtintinnids.

简介：Thereisadearthofinformationaboutthedistributionoftraceelementsinkerogenfromshalerocksdespiteseveralreportsontraceelementcompositioninmanyshalesamples.Inthisstudy,traceelementsinshalerocksandtheirresidualkerogensweredeterminedbyinductivelycoupledplasma–massspectrometry.Theresultsfromthisstudyshowredox-sensitiveelementsrelativelyconcentratedinthekerogensascomparedtotheshales.Thismaybeprimarilyduetotheadsorptionandcomplexationabilityofkerogen,whichenablesenrichmentinNi,Co,Cu,andZn.Fortherareearthelements(REEs),distinctdistributioncharacteristicswereobservedforshalesdominatedbyterrigenousmineralsandtheirkerogencounterparts.However,shaleswithlessinputofterrigenousmineralsshowedsimilarREEdistributionpatternstotheirresidualkerogen.ItisspeculatedthatthedistributionpatternsoftheREEsinshalesandkerogensmaybesourcerelated.

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简介：我们在北伊朗的多山的森林里根据包含的山腰材料(土壤或岩石)和山腰坡度的类型调查了邻近小量的道路的树看台的损坏的分发和频率。80个阴谋的一个总数系统地并且随机被取样记录损坏的树(弯曲，压碎并且伤害)由在道路的边的山腰坡度和材料的班。树在岩石斜坡伤害并且压碎比在有黏土的混合的山腰显著地大(p?45%是比在有斜坡坡度的山腰上更经常的2，8.5和2.3次<15%为分别地弯曲，压碎并且伤害。类型和最经常的损坏改变的损坏分发是树伤害(p?

简介：Inthispaper,wedevotetoconstructingtheone-sidedempiricalBayes(EB)testforthelocationparameterintheGammadistributionbynonparametricmethod.Undersomemildconditions,weprovethattheEBtestisasymptoticallyoptimalwiththerateoftheorderO(n-δs/2s+1),where1/2≦δ<1ands>1isagivennaturalnumber.Anexampleisalsogiventoillustratethattheconditionsofthemaintheoremsareeasilysatisfied.

简介：Inthispaper,weusetheinterflowareaastheresearchobjectinthelogicalscienceparkforsoilandwaterconservationinJiangxiprovince;andthePaspalumnatatumanditslittercoverareusedasthegroundflora.WediscussesandanalysestheverticaldistributionofrunoffsoastoprovidetheoreticalsupportforthewideapplicationofthePaspalumnatatumforsoilandwaterconservationintheregionofredsoilinsouthChina.

简介：这份报纸与错过反应数据的nonignorable考虑分发函数和quantiles的评价问题。三条途径被开发估计分发功能和quantiles，即，Horvtiz-Thompson-type方法，回归归罪方法和扩充反的概率加权的途径。倾向分数被semiparametric指定指数的倾斜模型。为了在倾向估计倾斜的参数，得分，作者建议一个调整实验可能性的方法处理过去识别的系统。在一些常规条件下面，作者调查asymptotic性质为分发功能和quantiles建议了三个评估者，并且发现这些评估者有一样的asymptotic变化。大折刀方法被采用一致地估计asymptotic变化。模拟研究被进行调查建议方法论的有限样品表演。

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简介：InMayandJulyof2017,ChinaGeologicalSurvey(CGS),andGuangzhouMarineGeologicalSurvey(GMGS)carriedoutaproductiontestofgashydrateintheShenhuareaoftheSouthChinaSeaandacquiredabreakthroughoftwomonthscontinuousgasproductionandnearly3.1×10^5m^3ofproduction.ThegashydratereservoirintheShenhuareaofChina,ismainlycomposedoffine-grainedclaysiltwithlowpermeability,andverydifficultforexploitation,whichisverydifferentfromthosediscoveredintheUSA,andCanada(bothareconglomerate),Japan(generally,coarsesand)andIndia(fracture-filledgashydrate).Basedon3Dseismicdatapreserved-amplitudeprocessingandfineimaging,combinedwithlogging-while-drilling(LWD)andcoreanalysisdata,thispaperdiscussestheidentificationandreservoircharacterizationofgashydrateorebodiesintheShenhuproductiontestarea.Wealsodescribethedistributioncharacteristicsofthegashydratedepositsandprovidedreliabledatasupportfortheoptimizationoftheproductionwelllocation.ThroughBSRfeaturerecognition,seismicattributeanalysis,modelbasedseismicinversionandgashydratereservoircharacterization,thispaperdescribestworelativelyindependentgashydrateorebodiesintheShenhuarea,whicharedistributedinthenorth-southstripandtendtobethickerinthemiddleandthinnerattheedge.Theeffectivethicknessofoneorebodyisbiggerbutthedistributionareaisrelativelysmall.ThemodelcalculationresultsshowthatthedistributionareaofthegashydrateorebodycontrolledbyW18/W19isabout11.24km^2,withanaveragethicknessof19mandamaximumthicknessof39m,andthedistributionareaofthegashydrateorebodycontrolledbyW11/W17isabout6.42km^2,withanaveragethicknessof26mandamaximumthicknessof90m.

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简介：我们使用了GIS和最大的熵预言六蛇种的潜在的分发在Kroumiria(西北的突尼斯)属于三个家庭：Natricidae(Natrixmaura和Natrixastreptophora)，Colubridae(Hemorrhoishippocrepis，Coronellagirondica和Macroprotodonmauritanicus)，和Lamprophiidae(Malpoloninsignitus)。为每种的合适的产地用最大的熵算法被建模，联合存在地数据(在16期间镇定?年：2000-2015)与一套七个环境变量(吝啬的年度降水，举起，斜坡坡度，方面，到水路的距离，陆地表面温度和规范的微分植被索引。这些环境变量的相对重要性被大折刀测试评估，我们的模型的预兆的力量在操作特征的接收装置下面用区域被估计。种类分发的主要解释变量是来自流和举起的距离，与分别地从60～77并且从10～25%的贡献。我们的学习提供了适用性在Kroumiria为蛇建模的第一个产地，这个信息能被担心在Kroumiria保存蛇的保存生物学家和陆地经理使用。

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