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218 个结果
  • 简介:AIM:Toinvestigatethefactorsinfluencingtheoccurrenceofgastricvarioliformlesions(GVLs)andtheirpossiblelinkwithgastriccancer.METHODS:A1:1matchedcase-controlstudywasperformedtoretrospectivelyanalyzedatafrom1638chronicgastritispatientswhohadundergonegastroscopyatoneoftwoChinesehospitalsbetween2009and2014.PatientswithGVLs(cases)werecomparedtothosewithoutsuchlesions(controls).Endoscopicandpathologicalfindingswererecorded,alongwithinterviewinformationonHelicobacterpylori(H.pylori)infection,medical,drugandfamilyhistories,lifestyleandeatinghabits.TheassociationbetweeneachfactorandtheoccurrenceofGVLswasestimated,andthenmultivariateconditionallogisticregressionwasusedtoevaluatetheindependentfactors.RESULTS:Thefrequencyandseverityofglandularatrophy,intestinalmetaplasia(IM)andlow-gradeintraepithelialneoplasiaweresignificantlyincreasedintheGVLgroup(P<0.01).OverallanalysisshowedthatH.pyloriinfection[3.051(2.157,4.317),P<0.001],allergicrespiratorydiseases[3.636(2.183,6.055),P<0.001],work-relatedstress[2.019(1.568,2.600),P<0.001],irregularmeals[2.300(1.462,3.619),P<0.001],highintakeofspicyfood[1.754(1.227,2.507),P=0.002]andhighintakeoffreshfruit[0.231(0.101,0.529),P=0.001]weresignificantlycorrelatedwiththeoccurrenceofGVLs(positively,exceptforthelatter).Stratifiedanalysesindicatedthatpickledfoodconsumptioninpatientsover50yearsold[7.224(2.360,22.115),P=0.001]andexcessivesmokinginmen[2.013(1.282,3.163),P=0.002]werealsopositivelycorrelated,andthat,forantralGVLs,vegetableconsumption[0.491(0.311,0.776),P=0.002]wasnegativelycorrelated.CONCLUSION:SevenriskfactorsandtwoprotectivefactorsaredeterminedforGVLs,whichwerefoundtobeassociatedwithpremalignantabnormalities.

  • 标签: GASTRIC cancer GASTRIC varioliform LESIONS PRECANCEROUS
  • 简介:Withvillageeliteflowastheclues,thisstudymainlydescribesthedevelopmentoftheHongqivillagecooperativeorganization.Throughanalyzingtheflowconditionindevelopmentprocessofthevillageelitepersonnelinthevillagecooperatives,thispaperexploresthestruggleandcooperationbetweenthedevelopmentsofcooperativesofendogenousforceinruralstructure.Thestudyfoundthatunderthelimitedsituationofruralelitecapacity,asanembeddedbasevillagebottom-upformationofcooperatives,theinternalforcesareconstantlyinatensionstructure,thevariousforcesinthedifferentdevelopmentperiodareconversionbetweenthesymbioticandopposition;Combination,differentiation,struggleofvariousforceswithinthecooperativearesupportedbytheirownwealth,genetic,factionalsocialcapital;thesplitsandrealignmentsofmalignantcompetitionforcescausedbyinternalcooperativesarethekeypowertorestrictthedevelopmentofvillagecooperatives.Thebase-levelcountrysideandcooperativesneedslimitedeliteunityandequilibriumofinternalforcestoobtaineffectivegovernanceandlong-termdevelopment.

  • 标签: cooperatives workers VILLAGE the BACKBONE MEMBERS
  • 简介:Basedonthebackgroundof'Internet+',afterfullysortingandstudyingontherelevantliteratureoffocusstrategy,thepapersummarizesthebasicmodesandinfluencefactors.Choosingtheimplementationoffocusstrategyisthebestwaytogainthecompetitiveadvantageinthenarrowmarket,butnotalltheenterprisesaresuitabletochoosefocusstrategy.Thispapermainlyusesthecasestudymethod,KunmingCh999isselectedasacasestudysample,throughtheresourcesandcapabilityanalysisofCh999,aswellasthecomparisonswithtwoe-commerceplatformsofTaobaoandJingdong,extractingfocusstrategymodesofCh999,theinfluencefactorsandrisksoffocusstrategyofCh999arealsostudied.Finally,inordertoensurethesmoothimplementationoffocusstrategy,puttingforwardsomeriskpreventionmeasures.

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  • 简介:Ecologicalconservationarea,asthemainwatersourceandecologicalbarrierofacity,providesecosystemserviceforurbansustainabledevelopment.Landusesimulationandforecastcouldbebeneficialtoimprovefuturelanduseefficiencyandenvironmentalprotection.Inthispaper,wetooktheMiyundistrictasthestudyareaandappliedtheCLUE-Smodelforlandusesimulation,basedonlandusedatain2001and2010.Eightkeydrivingfactorswereselected,includingelevation,slope,distance,populationdensityandothers.Basedontheadjustedmodelparameters,thelandusepatternsof2020inMiyundistrictweresimulatedrespectivelyforrapidgrowthscenario,landuseplanningscenarioandecologicalprotectionscenarioandthenidentifytheareaneededextraordinarysupervisioninlandplanningimplementation.Theresultsshowedthatthesimulationaccuracyfor2010reached85%considerably,implyingthattheCLUE-SmodeliswellfittedformodelingthelandusepatterninMiyundistrict.Constructionlandincreasesandcultivatedlanddecreasesdramaticallyby2020inrapidgrowthandlanduseplanningscenarios.ThepotentiallandusechangetendstooccurnearMiyunreservoir,whilethesensitiveareaforecologicalprotectionandlandplanningimplementationaredistributedaroundurbanarea,FengjiayuandJugezhuangtown.Someopencastmineareas,whichwouldbeconvertedtoforestlandinplanning,willbehardtoexecuteintheactualsituation,sotheseareasshouldbepaidmoreattentioninlandmanagement.TheconclusionsmadeinthisstudywillprovidedatareferenceandbasicinformationforthefutureecologicalprotectionandlanduseplanningimplementationinMiyundistrict,whichcouldalsobeusefulforothersimilarcities.

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  • 简介:Withtheexpansionoftheurbanization,theurbanagglomerationisformingintheregionandshowingaunificationtrend.Thedevelopmentofurbanagglomerationanditsunificationdependsonthecoordinationofthedivisionoflabor.Itissignificanttothefurtherdevelopmentofurbanagglomerationthatthecoordinationmechanismwasconstructed.TakingthesouthSichuanurbanagglomerations(SSUA)asanexample,theresearchanalyzesthecurrentsituationandproblemsofcities’unification,studiestheindustrialdistributionlayoutanddesignstheframeworkoftheregionallycoordinateddevelopment.Thentheauthorconstructsthecoordinationmechanismofurbanagglomerationdevelopmentandpresentsstrategiesforthecoordinateddevelopmentofurbanagglomerationanditsunification.

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  • 简介:AsamasterpieceofHawthorne’sworks,TheScarletLettersetsuponNewEnglandintheseventiethcenturyandsuccessfullydepictsthecrueltyofPuritansocietyandthekilltohumannature.However,itseemsthatthisisnottheonlypurposefortheauthortocriticizethePuritanism.Hawthornealsoendeavorstopursuitanidealharmonythroughtheimageoftheforest,whichisomittedbymostofthescholarswhoresearchHawthorne’sworks,especiallyforTheScarletLetter.Inthisthesis,itaimstoillustratetheidealharmonyfromtwoperspectives:first,theimageoftheforeststandsfortheharmonyoftheprimitivelife;second,theimageoftheforestrepresentstheharmonyofthedevelopmentbothinbodyandmind.

  • 标签: PURITAN society human nature HARMONY IMAGE
  • 简介:ThisstudytakesGannanTibetanAutonomousPrefectureastheplaceofcasestudyandtouristsasresearchobjects.Fromtheperspectivesofgeographicaldistributionofsourcetouristmarkets,TouristactivitybehavioralandspatialpatternsofTourists,thisstudylooksintothegeographicalstructureofthesourcetouristsandspatialpatternsbygeography.Theanalysisof341questionnairesontouristsshowsthat:(1)ThetourismcycleofGannanisinthedevelopmentphase,competingwithadjacentAba,andgreatlyimpactedbythesubstitutioneffectandshadoweffectofAba.(2)Thespatialdistributionoftouristsourcesisconcentrated,indicatingthatGannanisaregionaltourismdestination.Thetemporaldistanceoftouristsismainlyconcentratedwithinthe6-hourtrafficcircle.(3)GannanTibetanAutonomousPrefecturehasalreadybecomethecompositetouristdestinationdominatedbyleisurevacation.Theminorityfolkcustomandspeciallandscapearethemostattractivetourismresources.Duetotheimpactofman-landharmoniouslifestyleinthetouristareas,theenvironmentalattitudeoftouristsisimproved,andthetransportationandshoppingarethemostvulnerablelinksintourismserviceinGannanTibetanAutonomousPrefecture.(4)ThespatialbehavioroftouristsinGannanismainlyofsingle-destinationstyle(52%),Transitlegandcircletourstyle(7%)aswellascircletourstyle(41%).ThespatialdistributionoftouristflowinGannanshowsasignificantfeature"moreinthenorth,lessinthesouthanddependentonNationalRoad".Tourismresources,transportfacilities,regionalcompetitionandlackofrouteconnectingdifferentecologicalunitsareimportantcausesofthespatialdistributionofself-helptourists.

  • 标签: ECOTOURISM TOURIST activity BEHAVIOR spatial BEHAVIOR
  • 简介:福雷斯特植被碳模式为评估碳排放和累积是重要的。许多方法被用来然而,在以前的研究模仿森林植被碳存货的模式无常显然在不同方法的结果之间存在,甚至在不同研究的一样的方法的估计。三个以前的方法,包括空气植被相互作用模型2(AVIM2),Kriging,卫星数据基于的途径(SBA),和一个新方法,当模特儿的高精确性表面(HASM),被用来在中国在江西省模仿森林植被碳股票模式。交叉验证被用来评估方法。省的规模上的四个方法的无常和适用性被分析并且讨论。结果分别地证明HASM有最高的精确性,它在50.66%,33.37%和28.58%改善了,与AVIM2,Kriging和SBA相比。森林生物资源碳存货的模拟的无常主要从为错误,采样错误和森林区域的统计错误建模被导出。全部的森林碳存货,碳密度和江西的森林区域是288.62Tg,3.06kg/m2和94.32湡穩瑡潩n

  • 标签: 森林碳存货 HASM AVIM2 KRIGING 卫星数据基于途径(SBA )
  • 简介:Thehazardassessmentofpotentialearthquake-inducedlandslidesisanimportantaspectofthestudyofearthquake-inducedlandslides.Inthisstudy,weassessedthehazardofpotentialearthquake-inducedlandslidesinHuaxianCountywithanewhazardassessmentmethod.ThismethodisbasedonprobabilisticseismichazardanalysisandtheNewmarkcumulativedisplacementassessmentmodel.Themodelconsidersacomprehensivesuiteofinformation,includingtheseismicactivitiesandengineeringgeologicalconditionsinthestudyarea,andsimulatestheuncertaintyoftheintensityparametersoftheengineeringgeologicalrockgroupsusingtheMonteCarlomethod.Unlikepreviousassessmentstudiesongroundmotionswithagivenexceedanceprobabilitylevel,thehazardofearthquake-inducedlandslidesobtainedbythemethodpresentedinthisstudyallowsforthepossibilityofearthquake-inducedlandslidesindifferentpartsofthestudyareainthefuture.Theassessmentofthehazardofearthquake-inducedlandslidesinthisstudyshowedgoodagreementwiththehistoricaldistributionofearthquake-inducedlandslides.Thisindicatesthattheassessmentproperlyreflectsthemacroscopicrulesforthedevelopmentofearthquake-inducedlandslidesinthestudyarea,andcanprovideareferenceframeworkforthemanagementoftheriskofearthquakeinducedlandslidesandlandplanning.

  • 标签: 地震滑坡 灾害危险性 评价方法 滑县 概率地震危险性分析 危险性评估
  • 简介:基于性交的bivariate频率分析能被用来在能被气候变化引起的Huai河盆在洪水特征调查变化。历史的洪水山峰,在19612000的最大的3天、7天的卷和在20612100的未来值的univariate分布在A2,A1B和B1下面从二投射了GCM(CSIRO-MK3.5和CCCma-CGCM3.1)排放情形被分析并且比较。然后,山峰和体积的bivariate分布基于性交方法被构造,在联合回来时期的可能的变化被描绘。结果显示Clayton性交是更适当的为历史并且CCCma-CGCM3.1模仿洪水变量,当弗兰克和Gumbel的更好被适合到CSIRO-MK3.5模拟时。univariate和bivariate回来时期的变化表明洪水特征可能比不同排放情形对不同GCM更敏感。在二GCM之间,CSIRO-MK3.5显然在未来预言更严重的洪水条件,特别在B1情形下面,而CCCma-CGCM3.1通常建议矛盾的变化信号。这研究支持性交能用作一个可行、灵活的工具连接univariate边缘的分布充满变量并且确定联系了风险,它可以为基于风险的洪水控制提供有用信息。

  • 标签: COPULA 洪水频率分析 气候变化 淮河流域 大气环流模式 二维
  • 简介:Immigrationrelocationofthepoorinruralareasisaneffectivetargetedmeasuretohelppeopleoutofpovertyinthenewnormal.Thestructuralconstraintslieintheheavypressureoflandresourcesandenvironmentalcarryingcapacity,highcostofimmigrationsettlementanddelayedcounterpartfunds,insufficientindustrialsupportanddifficultyinliving-making.Torealizethegoaloftargetedpovertyalleviation,itdemandsdeterminationandcapabilityfromthepolicydesigner,aswellthesocialbasis.Theeffectimposedbythestructuralconstraintstoimplementationofsuchpolicyshouldbepaidadequateattentionbypublicsectors.Itissupposedtochangetheguidingdirectionofthepolicytimelyandtorelievefinancialburdenofimmigrationsettlementandresourceenvironmentalbearingcapacitythroughmechanismofjointeffortsfrominternalandmoreexternalsupport.

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  • 简介:Basedon6-hourlysensibleheatfluxandlatentheatfluxfromtheNCEPClimateForecastSystemReanalysis(CFSR)andcirculationdatafromtheJapanese25-yearReanalysis(JRA-25),theinitialdevelopingprocessoftropicalcycloneMindulle(1005)in2010hasbeendiagnosedtorevealtheimpactofair-seainteractionovertheSouthChinaSea(SCS)onthegenesisofitsincipientvortex.TheresultsshowthattheincipientvortexfirstoccurredeastoftheLuzonIslandon0000UTC20August,suggestingthatthetopographicforcingoftheLuzonIslandforeasterlywindsoverthewesternPacificmightbeoneofthefactorsresponsiblefortheformationoftheincipientvortex.Duringtheformationstageoftheincipientvortex,strongsoutheasterliesovertheSCScausedwarmwaterofthemiddleandeasternSCStoflowtowardtheLuzonIslandduetoEkmantransportresultingfromwindstress,leadingtoanincreaseoftheseasurfacetemperatureandsensibleheatfluxintotheatmosphere.Althoughtheanomaloussensibleheatingfavoredsurfacepressuretoreduce,itwasnotconducivetotheincreaseoflocalvorticityassociatedwiththevortexabovetheheatingareabecause,accordingtotheatmosphericthermaladaptationtheory,theanticyclonicvorticitywouldbecreatedinthelowertroposphereduetothedecreasedverticalgradientofthesensibleheating.However,theascendingmotionsoccurredovertheeasternareaoftheanomaloussensibleheatingduetotheaugmentationofthevorticityadvectionwithincreasingheight,causingwatervaportocondenseinthemiddleanduppertroposphere.Inturn,cyclonicvorticitywasgeneratedinthelowertroposphereduetotheincreasedverticalgradientofthecondensationlatentheating,resultingintheformationandfurthergrowthoftheincipientvortex.Therefore,thevorticitycreationduetothecondensationheatingplayedadominantroleduringthesubsequentenhancingstageoftheincipientvortex.

  • 标签: TROPICAL CYCLOGENESIS AIR-SEA interaction incipient VORTEX