简介:摘要:随着我国城市化进程不断推进,人们在生活质量提高的同时,越来越注重环境保护。生态工程和环境工程的应用原理和目标有相似之处,都能够作为环境破坏和污染的修复手段,在实际环境修复工程中关系密切,但由于生态工程和环境工程仍存在一定差异,制约了使用过程中的工程效益。本文主要对环境工程和生态工程进行比较,对二者形成的复合体系进行分析,希望能够对我国环境保护事业有所帮助。
简介:用合成分析方法探讨MCC热力学结构的演变规律,结果表明:MCC整个生命史里,对流层中下部为正涡度区,200hPa以上为负涡度区;发展时刻辐合区突然抬升;MCC前期的垂直上升速度最大中心高度低于后期的;MCC的高低空的冷心、中层暖心的温度结构在成熟期以后不明显
简介:使用上海天文台的25米天线和12.2GHz的接收系统,对银道面附近的一个HⅡ区复合体G18.2-0.3进行了射电连续谱观测。采用沿源运动轨迹,对观测曲线进行多子源模型拟合的方法将该复合体中的6个子源从延展的HⅡ区辐射中离了出来,并导出了每个子源在122GHz频率上的流量和角大小。结合国外台站的2695MHz、4750MHz和10.55GHz上的流量还得到了这些子源的辐射频谱。分析表明它们具有热辐射性质,对具有射电复合线(H76a)资料和角尺度的4个子源导出了它们的电子密度在(1-3)×10^2cm^-3间,此外通过对G18.2-0.3复合子源IRAS资料的分析和模型拟合还得到了每个子源周围冷尘埃的等效黑体温度。其中4个子源并具有IRAS-LRS资料,分析它们得到了该HⅡ区成协尘埃的性质。根据5个子源的IRAS流理、频带以及色改正因子又求出了这些子源在1-500μm间的总红外光度在2×10^4-10^5L⊙间。它表明与G18.2-0.3中各子源成协的新形成星是一些大质量的OB型星,它们在同一个延展HⅡ区中如此密集证明了大质量星“致密一堆积”形成模式的合理性。
简介:基于三维地震数据的剖面、切片和属性解释,在南海北部莺歌海盆地东方1—1地区发现一种特殊类型的沉积体。按照侧积复合体弯曲度大小可分为高弯度型和低弯度型两类,在地震剖面上均以叠瓦状强振幅反射为主要识别标志,不同之处是前者在平面上通常呈一组同心半环,后者则表现为带状展布。侧积复合体可能为重力流水道多期“下切-充填”并发生连续横向迁移而成,其下部由互相切叠的水道底部沉积组成,一般粒度较粗且横向连续性好,可作为良好的油气储集层;而向上变为砂泥间互的岩性组合,连通性减弱、储集性能降低。侧积复合体的发现对深水重力流沉积体系研究具有重要意义,且可为研究区的油气勘探提供新的远景目标。
简介:ThereisagoodcorrelationbetweenanomalousSchumannresonanceandseismicactivities.Pre-earthquakeanomalousSchumannresonanceisanimportantmanifestationofLAIC(Lithosphere-Atmosphere-IonosphereCoupling),whichisprobablyassociatedwithseismicionosphericdisturbance.TheobservationsystemparametersoftheYunnanSchumannresonancemonitoringstationsandtheresultsofstatisticalandseismiccasesanalysisareintroducedinthispaper.ThreedaysbeforetheMarch10,2011MS5.8Yingjiangearthquake,anomalousSchumannresonanceintheBycomponent(E-W)wasobservedbyYongshengstation,andtwodaysbeforetheLincangMS4.0earthquakeofJanuary23,2011,anomalousSchumannresonanceintheBycomponentwasdetectedbythesamestation.SpectrumanalysisresultsontheBycomponentobservationsofTonghaistationshowthatstrongdisturbanceswereobservedinspectraldensitycorrespondingtothefirstthreeSchumannresonantfrequenciesontheverydayoftheMS4.2HongheearthquakeofMay22,2011.ResearchshowsthatSchumannresonancemonitoringisafeasiblemethodforseismic-electromagneticprecursorsmonitoring.
简介:TheNorthYellowSeaBasin(NYSB),whichwasdevelopedonthebasementofNorthChina(Huabei)continentalblock,isatypicalcontinentalMesozoic-Cenozoicsedimentarybasinintheseaarea.ItsMesozoicbasinisaresidualbasin,belowwhichthereisprobablyalargerPaleozoicsedimentarybasin.TheNorthYellowSeaBasincomprisesfoursagsandthreeuplifts.Ofthem,theeasternsagisaMesozoic-CenozoicsedimentarysaginNYSBandhasthebiggestsedimentthickness;thecurrentKoreandrillingwellsareconcentratedintheeasternsag.Thissagiscomparativelyrichinoilandgasresourcesandthushasarelativelygoodpetroleumprospectinthesea.ThecentralsaghasalsoaccommodatedthickMesozoic-Cenozoicsediments.ThelatestresearchresultsshowthattherearethreeseriesofhydrocarbonsourcerocksintheNorthYellowSeaBasin,namely,blackshalesofthePaleogene,JurassicandCretaceous.TheprincipalhydrocarbonsourcerocksinNYSBaretheMesozoicblackshale.AccordingtothedrillingdataofKorea,theblackshalesofthePaleogene,JurassicandCretaceoushaveallcomeuptothestandardsofgoodandmaturesourcerocks.TheNYSBownsanintactsystemofoilgeneration,reservoirandcappingrocksthatcanhelphydrocarbontoforminthebasinandthusithasthegreatpotentialofoilandgas.TheverticaldistributionofthehydrocarbonresourcesismainlyconsideredtobeintheCretaceousandthenintheJurassic.
简介:Common-reflection-point(CRP)集合是连接地震数据和petrophysical参数的一座桥。预先叠属性抽取并且预先叠倒置,他们俩是水库预言的重要工具。CRP集合的质量通常在地震探索的精确性上有大影响。因此,预先叠CRP集合噪音抑制技术成为一个主要研究方向。基于向量分解原则,这里,我们建议一个方法压制噪音。这个方法由在各种各样的方向寻找估计最佳的单位向量然后通过向量角度变光滑和限制压制噪音。模型测试显示建议方法能把有效信号与噪音分开很好并且在单个wavenumber大小写中有效地压制随机的噪音。我们到真实数据的方法的申请证明方法能恢复有效信号,好振幅保存了从预先叠甚至在到噪音比率(SNR)的低信号的情况中的吵闹的地震数据。
简介:改进集中的能力预先叠时间移植允许想象的节反映结构的特征,深度,和接口形状,它是为起始的深度迁居速度模型的准备的关键步。传统的对称的旅行时间方程基于一个分层的模型的假设被导出。完成与强壮的侧面的变化集中在媒介的需要的效果是困难的。非对称的旅行时间方程基于谎言代数学和一个伪differential操作符包含能甚至在强烈侧面的可变媒介并且也改进集中的能力的侧面的速度衍生物为相对振幅保藏的重量系数的计算精确。与对称的方法相比,非对称的方法是更有效的。在这篇论文,我们描述几关键步非对称预先叠旅行时间计算和现在的一些测试用合成、真实的数据结果。
简介:Consideringtheheterogeneityofgeomechanicalmaterials,seismicityduringbrittlerockfailureundercompressiveloadingonthesamplewithanoriginalweakzoneissimulatedbyusingrockfailureprocessanalysiscode(RFPA2D).Therun-throughprocessofweakzone,theformingofnewfaultandassociatedmicro-seismicitiesarestudied.Themodelingdemonstratesthetotalprocessofsourcedevelopmentofearthquakefromdeformation,micro-failuretocollapseandthebehavioroftemporal-spatialdistributionofmicro-seismicities.Thestress,strainandthetemporal-spatialdistributionofmicro-seismicitieslife-likelyportrayedthephenomenaoflocalizationandtemporal-spatialtransitions,whichissimilartothoseobservedinourrealcrust.Also,theresultsobtainedinsimulationsareinagreementwithorsimilartothereportedexperimentalobservations.
简介:ReportedinthispaperaretheNdisotopiccompositionsofthepre-SinianandSinian-CambriansedimentaryrocksintheXiushuiarea,JiangxiProvince.SignificantdifferencesarenoticedbetweenthemintheirNdisotopicdompositions.Asforthepre-Sinianlightlymetmorphozedsedimentaryrocks,^143Nd/^144Nd=0.512000-0.512214,CNd(T)=-8.04-9.99,andTDM=18332426MaaresuggestedfortheSinian-Cambriansedimentaryrocks.ThesedifferenceswouldreflectthediversityofmaterialsourceforthesedimentaryrocksdepositedbeforeandaftertheSinianperiod.Mantlematerialap-pearstohavebeeninvolvedintheformationofthepre-Siniansedimentaryrockswhilethepost-Siniansedimentaryrocksarecomposedmainlyofrecycleddetritusfromthecontinentalcrust.
简介:摘要: 建设田园综合体是实施乡村振兴战略的有效途径之一 。石楼梁庄村在人口数量、 景观资源 、产业基础 和传统文化 等方面 ,具备建设 田园综合体的优越 条件。该村 充分开发 地方资源特色, 创造 集现代农业、休闲旅游、田园社区为一体的新型乡村生产生活模式 。
简介:ThetimeseriesofcoordinatesofalargenumberofGPSstationsintheworld,processedbyProf.GeoffreyBlewittwithGIPSYsoftwareareavailableathttp://geodesy.unr.edu.BasedonthetimeseriesofcoordinatesintheglobalreferenceframeofIGS08atmorethan250stationsofcontinuousGPSobservations,downloadedfromthewebsite,theco-seismicdisplacementsoftheM7.3KyushuearthquakeonApril16,2016inJapanandthepre-seismicstrainaccumulationsanddisplacementsintheregionalreferenceframewereobtained.ThestationofcontinuousGPSobservationatBJFSnearBeijinghasbeenquitestableindisplacementintheeasternpartofChinaformorethan17yearssincethebeginningofitsoperation,andthisstationisusedasthecorestationintheregionalreferenceframeforthepre-seismicdisplacementoftheKyushuearthquakeofM7.3.Themainfeatureofthepre-seismicdisplacementsoftheKyushuearthquakeischaracterizedbylockinginthecrustatandneartheepicenter.Theanomalouspre-seismicstrainaccumulationdevelopedinanareaofanomalousaccumulationoftheshearstraincomponentofγ1onthenortheastsideoftheepicenter,withincreasingsizeoftheareaandincreasingmagnitudeinγ1.Thelargestareacoveredbytheanomalousγ1isabout2000km2.ThechangeintheEcomponentatBJFSsinceNovember26,2015wascausedbythereplacementofthereceiverandtheantennaatthestation.Inordertostudytheshort-termchangeindisplacementsatstationsatandneartheepicenter,thetimeseriesat3stationswithcontinuousGPSobservations,2atSUWNandDAEJinsouthKoreaand1atBJSHnearBeijingwereanalyzed.Theanalysisshowsthatthedisplacementsatthe3stationshavebeenquitestableinthesamemannerineastAsia.Thus,BJSHisusedasthecorestationintheregionalreferenceframeofdisplacementandthedisplacementtimeseriesshowthattherewerenosignificantshorttermanomaliesbeforetheearthquake