学科分类
/ 25
500 个结果
  • 简介:Urbanforestryisunderstoodtobethemanagementoftreesandforestsinurbanareas.Ityieldsmanyenvironmentalandmaterialbenefits.InSabah,theenvironmentalservicesofurbanforestryaremoreimportantthanmaterialproducts.Thepotentialofpractisingurbanforestryinvariouszonesandunderdifferentlandownershipisevaluated.AsurbanisationhasoccurredrecentlyinSabah,urbanforestryhasonlybeenpractisedtoalimitedextent.Tourismisaneconomicsectorwhichhasgainedprominenceinrecentyearsandhashugegrowthpotential.Withthenumerousenvironmentalservicesprovidedbyurbanforestrytomakeurbanareasmoreinhabitable,theincreasingtourismactivitiesnecessitateintensificationofurbanforestryactivities.Themainurbancentrescontainmanytouristattractions,andarealsothegatewaystomanyotherecotouristdestinationslocatedthroughoutSabah.WithtourismhighonthedevelopmentagendainSabah,urbanforestryneedstobepromotedsothatbothlocalsandvisitorscanenjoythenumeroussocial,environmentalandeconomicbenefits.

  • 标签: 城市森林 城市绿地 森林旅游 野生动植物 保护 沙巴州
  • 简介:NiOOHnanosheet/graphenehydrogels(HNiOOH/GS),withmesoporousNiOOHnanosheetsuniformlydispersedwithinthehighlyin-terconnected3Dgraphenenetwork,areconstruct-edandstudiedforthefirsttimebyamixedsolvo-thermalandhydrothermalreaction.Theeffectofsol-ventcompositiononthemorphology,phase,anddispersibilityofnanocrystalandhydrogelstrengthis

  • 标签: 英语 阅读 理解 复合材料
  • 简介:Thevulnerableeco-areaisoneoftheimportantresearchtargetsinthefieldofsustainabledevelopment.Itistherequirementofbuildingawell-offsocietyinanall-roundwaythatweshouldstudymoreonthevulnerableeco-areas,dealwiththerelationshipbetweenenvironmentalprotectionandeconomicdevelopment,speeduptheeconomicdevelopmentintheseareasandincreasethelivingstandardofthelocalpeople.Thispaperputsforwardthecountermeasuresofenvironment---economycoordination,onthebasisoftherecognitionofeco-environmentfeaturesandsocialeconomicconditionsinthevulnerableeco-areasofChina,inviewoftheprogressinsustainabledevelopmentstudiesofthevulnerableones,takingthetransitionalareasoffarmingandpasturinginnortheastChinaasanexampletostudytheregionalenvironmentvulnerability.

  • 标签:
  • 简介:Sustainabledevelopmentofrefineryisanimportantproblemthatrefiningindustryfacesinthe21stCentury.Thesituationandchallengesinfrontofrefiningindustryareanalyzedandillustratedbyexamplesinthispaper.Itisalsorecognizedthatlarge-scale,clean,light-orientedandintegratedrefineryisthemodeofdevelopmentinfuture,andalsoanimportantmeasureforthesustainabledevelopmentofpetroleumresource.

  • 标签: SUSTAINABLE DEVELOPMENT REFINERY design CONSTRUCTION CLEAN
  • 简介:Fromthe1980stothemid-1990s,Africa’seconomicdevelopmentstagnated.ItsgeopoliticalimportancediminishedremarkablyaftertheendoftheColdWar.Africawasonceastrategic'abandonedpawn'oftheWest.Forquitealongperiodoftime,'Africapessimism'wasverypopularininternationalsociety.Nevertheless,overthepastdecade,majorchangeshavetakenplaceinAfrica.Itseconomicdevelopmenthaschangedfroma'low-ebb'periodintoagrowthperiod.Itsinternationalstatushaschangedfrom'beingmarginalized'into'beingupgraded.''Africanfever'isontheriseacrosstheglobe.Judgingfromboththedomesticandinternationalsituations,Africahasenteredintoitsmostfavorablestrategicperiodofpeaceanddevelopmentsinceindependence,greatlyincreasingtheworld’sexpectationofAfrica’sfuture.However,restrictedbymanyfactors,bothdomesticandinternational,Africastillhasalongandtoughwaytogotomakeitsrejuvenationdreamcometrue.

  • 标签: 非洲 国际社会 经济发展 地缘政治 悲观主义 国际形势
  • 简介:国际油价格的继续的逐步上升为中国的煤化学药品工业的开发提供了崭新的机会。同时,煤化学药品工业的技术完成了的大量钥匙有从甲醇在基于煤的甲醇和石蜡生产,在压力下面的煤的气,煤气纯化,syncrude制造,和乙酸的制造的地里认识到的重要进步的显著突破。

  • 标签: 中国 煤化学工业 发展趋势 煤气化 甲醇
  • 简介:Thisyearmarksthe60~(th)anniversaryoftheestablishmentofdiplomaticrelationsbetweenChinaandIndia.Duringtheperiod,China-Indiarelationsexperiencedsmoothdevelopment,twistsandturns,andfinedaysafterstorms,withfriendshipand

  • 标签: 中国 印度 中印关系 发展现状
  • 简介:Modernforestryfocusingonecologicaldimensionneedssomenewindicatorsdifferentfromthosedesignedforthetraditionalforestry.Onthebasisoftheevaluationindicatorsfortraditionalforestry,suchasforestcoverage,totalstandingstockvolumeandforestvolumeperunitarea,thepapercameupwithanewindicatorcalled"forestthickness"(FT).FTreferstothethicknesswhichcanbegotifusingtotalstockvolumeofforestandtreestocoverthetotallandinagivenarea,anditischargedb...

  • 标签:
  • 简介:ThesteelslagatBaosteelmainlycomesfrombasicoxygenfurnaces(BOF),electricarcfurnaces(EAF),continuouscastingandhotmetalpretreatment.TheoutputofthesteelslagatBaosteelwas4.43Mtin2010.Thesteelslagwasutilizedbothwithinthecompanyandacrossthesociety,andtheutilizationratewithinthecompanyachievedwas16%.Thisstudydescribesthecurrentstatusandexistingproblemsinthosetechnologiesoftreatingandusingsteelslag,intheaspectsofprimarytreatment,secondarytreatmentandadvancedtreatment,anditpointsoutthedevelopment'sdirection.

  • 标签: 钢渣 综合利用 宝钢 铁水预处理 氧气转炉 初级处理
  • 简介:Thereproducingalumina-magnesia-carbonbrickswerepreparedwiththedumpedbricksasstartingmaterials.Thebulkdensity,apparentporosity,crushingstrength,modolusofruptureandslagresistanceofthespecimenwereanalyzed.Theresultsshowthattheusedrefractoriescanbereusedandrecycledbytherightmethod.Thereproducingalumina-magnesia-carbonbrickswithbetterabilitieswereprepared.

  • 标签: 氧化铝 氧化镁 再制造砖 容积密度 抗渣性
  • 简介:Inthisstudy,28,691genomesequencesand16,566expressedsequencetags(ESTs)ofEucalyptuswerederivedfromtheGenBankdatabase.Atotalof2292SSRlociweresoughtoutfrom1785effectivesequences.ThroughanalysesofSSRlociinformation,theSSRmotiflengthwasnegativelycorrelatedwiththeabundanceoftheSSRs.IntheESTsequencesofEucalyptus,tripletrepeatmotifswerethemostabundant,anddinucleotiderepeatsmotifshadthehighestfrequencies.Subsequently,395pairsofprimersweredesignedbasedontheSSRloci.UsingoptimizedSSR-PCRconditions,340pairsofprimersweresuccessfullyscreened,withasuccessrateof86.1%.Byconstructionofamaximumlikelihoodphylogenetictreeofsixeucalyptspecies,representedbyfivespeciesofthegenusEucalyptusandoneofthegenusCorymbia,thegeneticrelationshipsofEucalyptusurophyllaandE.camaldulensissuggestedbythistreewasfoundtodifferfromthatsuggestedbytraditionalmorphologicaltaxonomy.TheresultsprovideinsightsforevaluatinggeneticdiversityofEucalyptusandanalysisofEucalyptusphylogeneticsusingSSRmarkers.

  • 标签: SSR EUCALYPTUS SSR MARKERS SSR LOCI
  • 简介:WiththeimplementationofNaturalForestsProtectionProgram,woodresourcebaseinChinaisshiftingfromnaturallygrownforeststoplantationforests.Thispaperreviews:1)TheevolutionofChinesedecade-longreforestationprogramanditscontributiontosustainablewoodsupplyanddevelopment,and2)impactsof"China'sNaturalForestProtectionProgramand"Fast-GrowingandHigh-YieldPlantationPrograminChina"onChina'swoodsupplyandsustainability.Inaddition,thispaperhighlightsChi...

  • 标签:
  • 简介:Inthispaper,IwillbrieflyanalyzetheroleofmassmediainthedevelopmentofTibettourism.ThroughsomeexamplesandsometheoreticalanalysiswewillmainlydiscusstheproblemsandtheprospectsofTibettourismmedia.IsincerelyhopethisthesiswillprovidesomegoodsuggestionsandviewstothedevelopingofTibettourism.

  • 标签: TIBET TOURISM TOURISM MEDIA MASS MEDIA