简介:监督分类法在遥感影像分类中应用广泛,结合已有地质资料和实测地质剖面信息,将研究区岩性分为苏维依组泥岩和粗砂岩,库姆格列木群泥岩、砾岩和含砾粗砂岩,巴什基奇克组粗砂岩和砾岩,巴西改组细砂岩等8个类型,运用ENVI提供的常用监督分类方法——最大似然法,对研究区的遥感影像进行岩性分类研究。并利用混淆矩阵分别对不同影像的分类结果进行精度评价,结果表明ZY-3影像的分类总体精度达到了78.65%,Kappa系数为0.7606,能够较好地进行岩性信息提取,具有较高的可靠性,可在地质调查工作中推广,能够有效地减少面积性地质测量工作,特别适用于岩石裸露程度较高的艰苦工作区。
简介:SongkeWellNo.2,oneofthemainpartofthescientificdrillingprojectinSongliaoBasin,whichwasdrilled7018mandacquiredthepartofcorescontinuouslyfromtheLowCretaceoustotheCarboniferousandthePermianfromthe2843mdeep,canbeconsideredasthedeepestcontinentaldrillingprojectinAsia.Aimingatthefeaturesoflongerwellsections,largerdiametersandmultiplespud-insforcoringofSongkeWellNo.2,thisprojectbrokethroughthe"coringinsmalldiameterandreaminginlargediameter"spud-indrilling-completionprocedureswhicharealwaysusedinlarge-diameter-wellcoringforcontinentalscientificdrillingprojectsindomesticandoverseasandthedrillingmethodofshort-singlecylinderroundtripfootage.Atthesametime,"coringinthesamediameterandcompletingdrillingatonesinglediameter"wasachievedatallφ311mmandφ216mmcoringsectionsofmorethanonethousandmeterslong,high-efficientoperationwith"drillinglongfootagewithdrilltoolscombinedinmulticylinders"wasachievedatdeepcoringsection.Fourworlddrillingrecordswerecreatedwhichincludemorethanathousandmeterscontinuouscoringatφ311mm,andthefootageperroundtripfootageatφ311mm,φ216mmandφ152mmisallmorethan30m,allofthesebreakthroughsreducedatleast300daysforthisproject;moreover,consideringthecharacteristicsofformationsthatthegeothermalgradientishighinthedrilledsectionsandtheinside-welltemperatureisover240℃afterdrillingcompletion,aformate-polymerwater-basedmudsystemwasdevelopedbycompoundingattapulgiteandsodiumbentoniteandbyaddingindependentlydevelopedhigh-temperaturestabilizer,whichcanprovidecriticaltechnicalsupportforsuccessfulwellcompletionat7018minthesuper-high-temperatureenvironmentItisthefirsttimethatthewater-basedmudisoperatedattheworkingtemperaturehigherthan240℃inChina;Besides,consideringthehigh-qualityrequirementoncoresimposedbytheproject,themethod"mechanicalcor
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简介:摘要本文章简要讨论了在数学中有关圆的不遗漏、不重复的一些问题。通过典型例题与思维方法相结合,强调了师生不要忽视这种问题。
简介:Theinvestmentriskmanagementoftheexistingbuildingenergy-savingrenovationprojectforESCOcannotbeseparatedfromthescientificriskmeasurementandevaluation.Theinvestmentriskassessmentisthebasisofinvestmentdecisionandprojectimplementation.Basedonthecontentanalysisandbalanceofevaluationprincipleofinvestmentriskevaluationontheexistingbuildingenergy-savingrenovationproject,wesetupthreelevelsofexistingbuildingenergy-savingrenovationprojectinvestmentriskevaluationindexsystem,usefuzzycomprehensiveevaluationmethodtoevaluatethequantitativeprocess,getthescientificassessmentoftheinvestmentriskofexistingbuildingenergy-savingrenovationproject,andsupporttheinvestmentriskresponsestrategyandcontrolmeasuresofexistingbuildingenergy-savingrenovationprojectforESCO.
简介:摘要本篇文章主要是从三个方面对电力营销中的客户分类策略应用进行的简要分析。第一个方面就是简要阐述电力营销中的客户分类理论与电力公司之间的关系,并且详细分析客户分类这一个工作的意义、特性以及必要性。第二个方面就是针对电力营销中经常会出现的客户分类问题,进行简要的分析以及研究,指出以前客户分类办法的缺点以及隐患问题。第三个方面就是对当前社会中电力营销的客户分类策略应用进行陈述,并且在使用客户分类策略的时候,工作人员必须要运用价值分类作为主要内容,将高危等级分类作为辅助的前原则,而且应该针对这个问题进行不断的补充说明。工作人员一定要科学、合理的应用电力营销中的客户分类策略,只有这个样才能够更好的完成电力营销方面的工作。