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簡介:MODERNECONOMY,2014,5,152160PUBLISHEDONLINEFEBRUARY2014HTTP//WWWSCIRPORG/JOURNAL/MEHTTP//DXDOIORG/104236/ME201452017OPENACCESSMERURALTOURISMINTHESOUTHOFSPAINANOPPORTUNITYFORRURALDEVELOPMENTGENOVEVAMILLáNVáZQUEZDELATORRE1,LUISAMADORHIDALGO2,JUANMANUELARJONAFUENTES11DEPARTAMENTOFQUANTITATIVEMETHODS,UNIVERSIDADLOYOLAANDALUCíA,CóRDOBA,SPAIN2DEPARTAMENTOFECONOMICS,UNIVERSIDADLOYOLAANDALUCíA,CóRDOBA,SPAINEMAILGMILLANULOYOLAES,LAMADORULOYOLAES,JMARJONAULOYOLAESRECEIVEDDECEMBER24,2013REVISEDJANUARY24,2014ACCEPTEDJANUARY31,2014COPYRIGHT?2014GENOVEVAMILLáNVáZQUEZDELATORREETALTHISISANOPENACCESSARTICLEDISTRIBUTEDUNDERTHECREATIVECOMMONSATTRIBUTIONLICENSE,WHICHPERMITSUNRESTRICTEDUSE,DISTRIBUTION,ANDREPRODUCTIONINANYMEDIUM,PROVIDEDTHEORIGINALWORKISPROPERLYCITEDINACCORDANCEOFTHECREATIVECOMMONSATTRIBUTIONLICENSEALLCOPYRIGHTS?2014ARERESERVEDFORSCIRPANDTHEOWNEROFTHEINTELLECTUALPROPERTYGENOVEVAMILLáNVáZQUEZDELATORREETALALLCOPYRIGHT?2014AREGUARDEDBYLAWANDBYSCIRPASAGUARDIANABSTRACTTOURISMISONEOFTHEMOSTENRICHINGEXPERIENCES,ANDEVENMORESOIFITINVOLVESARURALHABITAT,INCONTACTWITHTHEENVIRONMENTTHISKINDOFTOURISM,ONEOFTHEMOSTREQUESTEDBYSOCIETYCURRENTLY,OFFERSAGREATCHANCEFORDEVELOPINGRURALAREASRURALTOURISMHASBECOMETHESOLUTIONFORSOMEPROBLEMSTHATHAVEBECOMEEVIDENTINTHOSEAREASTHEHIGHRATEOFUNEMPLOYMENT,RURALEXODUSANDPRIMARYSECTORDEPENDENCESOTHEPRACTICEOFTHISACTIVITYWILLGENERATEANDDIVERSIFYINCOME,ANDCREATEEMPLOYMENTFORTHISREASONITISNECESSARYTOOFFERAPRODUCTADAPTEDTOCONSUMERTOURISTDEMAND,ANDTHEREFOREITISESSENTIALTOKNOWPROFILEOFTHETOURISTTHEANDALUSIANREGION,INTHESOUTHOFSPAIN,ISFAMOUSFORBEINGATOURISTAREAOFGREATSINGULARITYEXHIBITINGDIFFERENTDEGREESOFDEVELOPMENTANDMODELSOFTOURISTICEXPLOITATION,STRONGLYCHARACTERIZEDBYITSOFFEROFSUNANDBEACHTODAY,THISCOMMUNITYDOESNOTLIMITITSELFTOOFFERINGONLYASUNANDBEACHEXPERIENCESINCENOTALLTOURISTSTHATCHOOSEITASTHEIRDESTINATIONHAVEEXCLUSIVEPREFERENCEFORTHISSECTORAMONGALLTHENEWPROPOSALS,ONEMODALITYISRURALTOURISM,WHICHISTHEFOCALPOINTOFTHISSTUDY,ESPECIALLYTHOSEINITIATIVESFORRURALTOURISMINNATURALPARKSRURALTOURISMISADEVELOPMENTFACTORTHATWILLHELPTOCORRECTREGIONALIMBALANCESDEVELOPMENTALPOLITICSRELATEDDIRECTLYTOWEALTHGENERATIONINTHESERURALAREASCANBEBOLSTEREDBYTHISACTIVITYTHISSTUDYWILLESTIMATEAFORECASTTOMODELMONTHLYRURALTOURISTDEMANDINANDALUSIAFOR2014ITSAIMISTOREVEALITSEVOLUTIONINTHEIMMEDIATEFUTUREINORDERTOPROPOSEMEASURESTOENCOURAGEACTIVITYINSAIDTOURISMSECTOR,BYMAKINGUSEOFTHE24NATURALPARKSANDPROTECTEDAREASLOCATEDINTHISREGIONKEYWORDSRURALTOURISMRURALDEVELOPMENTNATURALPARKSANDALUSIADEMANDFORECAST1INTRODUCTIONRURALTOURISMISATOOLTOFURTHERREGIONALDEVELOPMENTWHERETHEREISASOCIOECONOMICIMBALANCEINSPAIN,RURALAREASWITHLOWLEVELSOFINCOMEANDPRODUCTIVITYSTILLPREVAILGENERALLY,THEYFOCUSTHEIRPRODUCTIONONECONOMICACTIVITIESDIRECTLYRELATEDTOTHEPRIMARYSECTORANDSUFFERHIGHRATESOFUNEMPLOYMENTTHEYNEEDTODIVERSIFYTHEIRINCOMETHESEREGIONSNEEDSUSTAINABLEGROWTHTHROUGHANECONOMICCULTUREBASEDONTHEEFFICIENTADMINISTRATIONOFRURALRESOURCES,INVOLVINGTHEPOPULATIONWHOSEMAINAIMISTOACHIEVEASOCIOECONOMICANDENVIRONMENTALBALANCEACCORDINGTOETXANO1,RURALTOURISMWILLPROVIDEADDITIONALINCOMETOWHATTHEYALREADYRECEIVEANDSTABLEEMPLOYMENTALLINALL,ITWILLCONTRIBUTETOREDUCINGPOVERTYANDREDISTRIBUTINGINCOMEWEDONOTPROPOSEMAKINGTOURISMTHEMAINSOURCEOFINCOMEINTHESEREGIONS,BUTWEFEELITCOULDBEANADDITIONALINCOMECONTRIBUTIONFORTHEINHABITANTMEDIANO2ANDBUCKLEY3POINTOUTTHATWHENTOURISTSWISHTOENJOYTHENATURALENVIRONMENT,THEYAREINCLINEDTOOPTFORRURALTOURISMINCONTACTWITHTHATNATURALENVIRONMENTTOGETAWAYFROMTRADITIONALSUNANDSEATOURISM,BECAUSETHELATTERTOURISMNOLONGERSATISFIESNEWINCLINATIONSTHATHAVEBEENAPPEARINGINOURSOCIETYGMVDLTORREETALOPENACCESSME154FIGURE1RURALTOURISMCONCEPTMAPITOFCOURSE,THEPARTICIPATIONOFTHEPEOPLEISAMOMENTOUSFACTORINRAISINGTHELEVELOFASSOCIATIONBETWEENTOWNSANDONEOFTHEMAINWEAKNESSESISTHEINCREASINGPUBLICAWARENESSOFTHISPOTENTIALBOONTOBEEXPLOITEDINTHEREGIONITISNECESSARYTORAISETHEREGION’SINHABITANTS’DEGREEOFCOMMITMENTTOWARDTOURISMMATTERS,BECAUSETHEYWILLBETHEMOSTBENEFITEDEQUALLY,PUBLICBODIESSHOULDPROMOTEDEVELOPMENTPLANSTOMAKETOURISMACTIVITYEASIERINTHESEZONESALTHOUGHTHEGROWTHOFEVERYREGIONHASTOCOMEFROMWITHINTHEREGIONITSELF,WESHOULDCONSIDERTHERESOURCESANDPOSSIBILITIESOFTHEAREATOENCOURAGETHEMTOOFFERAPRODUCTWHICHSATISFIESTOURISTCONSUMERS’NEEDSFULLYANTON,NELOINTHELONGTERM,THECOSTOFLIVINGWILLINCREASE,AGRICULTURALAREAWILLDECREASEBECAUSEOFALLTHESETHINGSITWILLBENECESSARYTOHAVEEFFECTIVEANDEFFICIENTPLANNINGANDMANAGEMENTOFALLREGIONALRESOURCESANDBEAWARETHATTOURISTDESTINATIONSSHOULDNOTRUNTHERISKOFFLOODING,WHICHWOULDCAUSETHEMTOLOSEALLTHEIRCHARM,AFFIRMZHONG,DENG,SONGANDDING183RURALTOURISMINANDALUSIA31INTRODUCTIONTHEREGIONALAUTONOMYOFANDALUSIAEXHIBITSAPRECARIOUSECONOMICSITUATIONWITHHIGHUNEMPLOYMENTRATES3637,10POINTSOVERTHESPANISHAVERAGE2898,ALONGWITHLOWACTIVITYRATES5894COMPAREDTOTHE5994NATIONALAVERAGEFORTHETHIRDTRIMESTEROF2013ITISONEOFTHECOMMUNITIESMOSTAFFECTEDBYTHEECONOMICCRISIS,WHICHISESPECIALLYSERIOUSINTHERURALAREASOFTHEREGIONANALYZINGEMPLOYMENTBYSECTORSTABLE1,THEANDALUSIANPOPULATIONCOMPRISES253MILLIONPEOPLE,WHI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10 賞幣上傳時(shí)間:2024-03-13頁數(shù): 914人已閱讀
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簡介:中文中文4400字出處蔣正武出處蔣正武HEALINGEFFECTIVENESSOFCRACKSREHABILITATIONINREINFORCEDCONCRETEUSINGELECTRODEPOSITIONMETHODJJOURNALOFWUHANUNIVERSITYOFTECHNOLOGYMATERSCIED2008,236917922采用電沉積法修復(fù)鋼筋混凝土裂縫的愈合效果采用電沉積法修復(fù)鋼筋混凝土裂縫的愈合效果摘要摘要針對鋼筋混凝土裂縫的修復(fù),電沉積法及其實(shí)驗(yàn)裝置被提出;多孔混凝土被用于模擬開裂的混凝土,該方法用質(zhì)量增量、滲透系數(shù)以及超聲波聲速作為裂縫修復(fù)愈合效果的評價(jià)指標(biāo),進(jìn)行電流密度、電解質(zhì)溶液濃度對不同孔隙率多孔混凝土愈合效果影響的研究。實(shí)驗(yàn)結(jié)果表明,多孔混凝土模擬裂縫的實(shí)驗(yàn)?zāi)苡行Х从畴姵练e法的修復(fù)效果;在早期,多孔混凝土總孔隙率對電沉積法的修復(fù)效果影響不大;電流密度或電解質(zhì)濃度越高,在多孔混凝土中沉積速度和聲速越快,多孔混凝土的滲透系數(shù)越低;在高電流密度下產(chǎn)生排列疏松的較大薄板狀MGOH2晶體。關(guān)鍵詞關(guān)鍵詞電沉積;多孔的;鋼筋混凝土;裂縫;愈合11引言鋼筋混凝土(RC)是一種廣泛運(yùn)用于建筑、橋梁、水利結(jié)構(gòu)和海洋工程等的建筑材料。然而,鋼筋混凝土結(jié)構(gòu)在它們使用壽命期間通常會受到周圍環(huán)境侵蝕而不可避免的產(chǎn)生微裂縫,從而降低鋼筋混凝土結(jié)構(gòu)的承載力和耐久性,因此,有必要恢復(fù)或修復(fù)。根據(jù)裂縫產(chǎn)生的原因和環(huán)境條件,有很多修復(fù)的方法,如加固、錨固、灌漿、密封和更換等;然而,這些方法在處理置于水環(huán)境中的鋼筋混凝土結(jié)構(gòu)裂縫表現(xiàn)出一定的局限性。針對水下混凝土結(jié)構(gòu),開發(fā)新的無損修復(fù)方法具有重要的現(xiàn)實(shí)意義。電沉積法是一種新開發(fā)的水下混凝土裂縫修復(fù)技術(shù)。它充分利用混凝土和水環(huán)境條件的特點(diǎn),在鋼筋混凝土結(jié)構(gòu)鋼筋與外部電極(陽極)間施加一種微弱直流電,使其在鋼筋混凝土鋼筋周圍產(chǎn)生電沉積,在裂縫和表面形成無機(jī)難溶化合物屏障涂層,如ZNO、CACO3和MGOH2等填充鋼筋混凝土裂縫和密封表面。近年來,一些關(guān)于使用電沉積法修復(fù)鋼筋混凝土裂縫的可行性、原理和實(shí)驗(yàn)控制的研究報(bào)告被提出。然而,如何在實(shí)驗(yàn)室模擬鋼筋混凝土中的裂縫,如何在混凝土試件中預(yù)置裂縫,如何對鋼筋混凝土裂縫愈合效果的有效性進(jìn)行評估,是采用電沉積法修復(fù)鋼筋混凝土裂縫的困難研究課題。目前,主要提出了兩種在鋼筋混凝土中預(yù)置裂紋的模擬方法,包括破裂法圖1鋼筋籠及其多孔混凝土試樣示意圖鋼筋籠及其多孔混凝土試樣示意圖/MM/MM多孔混凝土試件進(jìn)行以下操作過程首先,骨料和水泥放入攪拌機(jī)攪拌30秒,然后加水?dāng)嚢?分鐘,之后將混合物填入模具內(nèi),模具在頻率為50赫茲的振動(dòng)器上振動(dòng)20秒,用抹刀將模具表面壓實(shí)和刮平,同時(shí),為了防止水分蒸發(fā)在模具表面覆蓋一層塑料薄膜,最后,將它們搬至相對濕度>90、溫度為20±3℃的標(biāo)準(zhǔn)養(yǎng)護(hù)室養(yǎng)護(hù);養(yǎng)護(hù)48小時(shí)后將試樣從模具中取出,繼續(xù)養(yǎng)護(hù)至七天,然后對它們進(jìn)行電沉積修復(fù)實(shí)驗(yàn)。2323實(shí)驗(yàn)裝置設(shè)計(jì)實(shí)驗(yàn)裝置設(shè)計(jì)電沉積法裂紋修復(fù)實(shí)驗(yàn)裝置示意圖如圖2所示;多孔混凝土試件放入充滿電解質(zhì)溶液的容器,基于實(shí)驗(yàn)結(jié)果,MG(N03)2被選擇作為電解質(zhì),溶液濃度控制為005MOL/L和01MOL/L,惰性鈦板作為外部陽極材料放在容器的底部,直流穩(wěn)壓電源的電壓范圍為036V,它的正極連接陽極鈦板,負(fù)極連接試件的鋼筋,通過電解質(zhì)溶液形成一個(gè)閉合電路,電路中的電流密度通過調(diào)整供應(yīng)的電壓被控制在05A/M2和10A/M2兩個(gè)值上,根據(jù)鋼筋的總表面面積計(jì)算電流密度;實(shí)驗(yàn)保持在溫度為20±3℃的恒定環(huán)境條件下進(jìn)行,持續(xù)9周,電解質(zhì)溶液每兩周更換一次。圖2電沉積法裂紋修復(fù)實(shí)驗(yàn)裝置示意圖電沉積法裂紋修復(fù)實(shí)驗(yàn)裝置示意圖1多孔混凝土試件;多孔混凝土試件;2鋼筋;鋼筋;3孔隙;孔隙;4電解質(zhì)溶液;電解質(zhì)溶液;5鈦板;鈦板;6直流穩(wěn)壓電源直流穩(wěn)壓電源下載積分: 10 賞幣上傳時(shí)間:2024-03-15頁數(shù): 918人已閱讀
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