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:Trump'sMiddleEastpolicycouldbesummarizedas"oneaxisandthreeapproaches."ThemaindriveriscreatinganallianceofIsraelandSaudiArabia,andhisthreeapproachesaretocontainIran,counterterrorism,andlaunchthedealofthecentury.BehindthisMiddleEastpolicyisTrump'saccelerationofglobalcontraction,andareturntotheUSpro-Israeldiplomatictradition,bothinfluencedbyTrumpianstyleandtheJewishpeoplearoundhim.AnyrelianceonanIsrael-SaudiArabiaallianceisinherentlyfragile,thepotentialforIranregimechangeunclear,andTrump'splanneddealwoulddestabilizetheregionandexpandaUS-Europeanrift.ChangingthisdirectionwouldrequiretheUStothinkmoredeeplyaboutMiddleEastlong-termprospectstofindamorebalancedpolicy.
简介:Inthispaper,theoptimalmaintenancepolicyisinvestigatedforasystemwithstochasticleadtimeandtwotypesoffailures.Thesystemhastwotypesoffailures,onetypeisrepairable,whentherepairablefailureoccurs,thesystemwillberepairedbyrepairman,andthesystemafterrepairisnot“asgoodasnew".Theothertypeoffailureisunrepairable,andwhentheunrepairablefailureoccursthesystemmustbereplacedbyanewandidenticalone.Thesparesystemforreplacementisavailableonlybyorder,andtheleadtimefordeliveringthesparesystemisstochastic.Thesuccessivesurvivaltimesofthesystemformastochasticallydecreasinggeometricprocess,theconsecutiverepairtimesafterfailuresofthesystemformarenewalprocess.Byusingtherenewalprocesstheoryandgeometricprocesstheory,theexplicitexpressionofthelong-runaveragecostperunittimeunderorderingpolicy(N-1)isderived,andthecorrespondingoptimalcanbefoundanalytically.Finally,thenumericalanalysesaregiven.
简介:Since2017,theadjustmentofJapan’ssecuritypolicyhasacceleratedtowarditsgoalofself-defense.In2018,JapanwillreviseitsNationalDefenseProgramGuidelines.AccordingtoPrimeMinisterShinzoAbe,therevision,“insteadofextendingtheexistingpolicyline,willconsiderthevisionofthedefensecapabilitiestrulynecessaryforprotectingtheJapanesepeople,”1whichindicatesthattheJapanesedefenseforcewillundergoaqualitativechange.Withtheadjustmentofitssecuritypolicy,Japanwilladoptmoreprogressivemeasuresindefensespending,procurementofdefenseequipment,improvementofdefensesystems,andbreakthroughofitsdefenseregulations.Externally,Japanwillfurtheradvancedefensediplomacy,andconsolidateandexpanditssecuritycooperationnetwork,whichwillhaveasignificantimpactonregionalsecurityandthusdeservescloseattention.
简介:Culturalheritagedoesnothavedirecteconomicbenefits.However,ifproperlymanageditcanstimulatesocialcohesions,improvingtheenvironmentandhavebeneficialeconomicspinoffsforthelocalcommunities.Thispaperdiscussestheroleofcommunitiesintheformulationofthepoliciesconcerningtheirlocalenvironment.Itarguesthatcommunityengagementbypolicymakersisimportantingivinglegitimacyandownershipofthepolicies.Furthermore,thispaperdiscussesthepotentialofculturalheritageindiversifyingtheeconomyinBotswana.Thispaperrecommendsforthere-assessmentoftherelationshipbetweenthestateandlocalcommunitieswhichiscriticalinresuscitatingtheseeminglyailingcommunitybusinessorganizations.Inconclusion,itarguesforthesustainablemanagementofculturalheritageasasocialandeconomicresourceinthenext50yearsofBotswana’sindependence.
简介:Performanceenhancementisconsideredanessentialpartofsport.1However,intheworldofcompetitiveandhigh-performancesports,thereisincreasingevidenceofahighprevalenceofperformance-enhancingdrugabuse.2-4Theuseofdrugsthatis,bannedsubstances-hasbecomeaseriousproblemwithsignificantsocial,ethical,policy,andpersonalconsequences,5-7andconsequentlycompromisestheintegrityofsportsandsportsmanshipatalllevelsofcompetition,aswellasthehealthandwell-beingofindividualathletesandpublichealthingeneral.