简介:BasedontheplantleveldatafromtheFirstNationalCensusofBasicUnits,theSecondNationalCensusofBasicUnits,andtheFirstNationalEconomicCensusofChina,thispaperex-aminesthegeographicalagglomerationofChinesemanufacturingindustriesatamoredisaggregatedlevelbothbyindustrialclassi-ficationandspatialunitanalysis.ApplyingtheagglomerationindexproposedbyMaurelandSedillot,studiesshowthatthemostagglomeratedindustriesareresource-intensive,andcapitalandtechnologyintensivewhileindustriesdemandinglocalizedinputsorservinglocalizedmarketsorfavoredbylocalgovernmentsarefairlydispersed.Themoredisaggregatedindustriesaremorespa-tiallyagglomerated.Atthefinerspatialscale,industriesaremoredispersed.Resultsindicatethatwithin-countyspilloversarestrongerthannearby-countyspillovers,andwithin-prefecturespilloversarestrongerthannearbyprefecturespillovers.Local-izedspilloversarestillquitesubstantialatarangebeyondthatofcounties.ComparingtheagglomerationindexofChinesemanu-facturingindustriesin1996,2001and2004,agglomerationseemstobeageneraltendency.Resultsalsoindicatethatsomeindustrieshaveexperiencedremarkablechangesintheirlevelsofagglom-erationintheperiod1996–2004.
简介:长江三角洲(UA-YRD)上的城市的凝块在水,土地,生态的环境,地点和交通的方面有一些优点。依靠资源环境库和另外的优点,UA-YRD完成了大开发。基于索引系统和全面评估的模型,自从1978,纸计算UA-YRD的发展水平。从1978~2007,开发水平以0.0333的年度率逐年增加了的结果表演,和开发的进程能被划分成三个阶段,即低速度的开发舞台(19781991),快速的开发舞台(19912000),并且高速度的开发舞台(20002007)。速度分别地是0.0083,0.0356和0.0766。在30年的发展期间,外国经济活动在开发有最大的效果,由交通,工业经济活动和电信列在后面(有序)。另外,不同驱动力在不同阶段有不同效果。纸建议更多的注意应该对高速度的发展阶段和重要驱动力被给予驾驶它的发展。同时,资源和环境的限制不应该被忽视,长有效的机制需要被证实在UA发展,资源利用和环境保护之中支撑和谐开发。一些比较研究应该着急地被执行有效地支持并且支持UA的持续开发,特别向进化,驱动力和braking力量。
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简介:ThispapercalculatestheindustrialcarbonemissionsoftheYangtzeRiverDeltaurbanagglomerationovertheperiod2006-2013.AnempiricalanalysisisconductedtofindouttheinfluencingfactorsofindustrialcarbonemissionsoftheYangtzeRiverDeltaurbanagglomeration,usingaspatialDurbinpanelmodel.Theresultsshowthatcitieswithlargerindustrialcarbonemissionsoftenenjoylowannualgrowthrates,whilethecitieswithsmalleronesenjoyhigherannualgrowthrate;Thereexistsacomparativelystrongpositivecorrelationinspaceinpercapitacarbonemission;urbanization,andtotalpopulation.GDPpercapitaandinternationaltradearethemaininfluencingfactorsofindustrialcarbonemissions;Therearespatialspillovereffectsoninternationaltradeandurbanizationofneighboringcities,whichhaveasignificantimpactonlocalindustrialcarbonemissions.
简介:Thearticleestablishestheappraisalindexsystemforentireurbanagglomerationanditsinteriorcitiesindividually,concretelyincludingfiveaspects:drivingforcesfortourismdevelopment,theleveloftourismdevelopment,tourismimpacts,tourismeconomicconnectionandtourismcontributionsofdifferentcitiestothewholeurbanagglomeration.Astourismcompetitivenesshasthecharacteristicsofcomprehensiveness,systematicnessanddynamicness,thearticleattemptstoapplythestructuralpredictionmeansofsystemdynamicstoevaluatingtourismcompetitiveness,aimingtoprovidesomeresearchmethodsandanalysisideasfortourismcompetitivenessmeasurementandtrendsanalysisinurbanagglomeration.TakingShandongPeninsulaurbanagglomerationasthestudyarea,thearticlesimulatesandanalyzesthetourismcompetitivenesstrendofthewholeregionanditsinteriorcitiesfrom2005to2020,andtheresultreflectsthatintegrateddevelopmentandregionalcombinationoftourismareimportantmeanstoupgradetourismcompetitivenessinthisregion.
简介:Withtheexpansionoftheurbanization,theurbanagglomerationisformingintheregionandshowingaunificationtrend.Thedevelopmentofurbanagglomerationanditsunificationdependsonthecoordinationofthedivisionoflabor.Itissignificanttothefurtherdevelopmentofurbanagglomerationthatthecoordinationmechanismwasconstructed.TakingthesouthSichuanurbanagglomerations(SSUA)asanexample,theresearchanalyzesthecurrentsituationandproblemsofcities’unification,studiestheindustrialdistributionlayoutanddesignstheframeworkoftheregionallycoordinateddevelopment.Thentheauthorconstructsthecoordinationmechanismofurbanagglomerationdevelopmentandpresentsstrategiesforthecoordinateddevelopmentofurbanagglomerationanditsunification.
简介:TheZnOquantumdots(QDs)weresynthesizedwithimprovedchemicalsolutionmethod.ThesizeoftheZnOQDsisexceedinglyuniformwithadiameterofapproximately4.8nm,whicharehomogeneouslydispersedinethanol.Theopticalabsorptionedgeshiftsfrom370nmofbulkmaterialto359nmofQDmaterialsduetothequantumsizeeffect,whilethephotoluminescencepeakshiftsfrom375nmto387nmwiththeincreaseofthedensityofZnOQDs.ThestabilityofZnOQDswasstudiedwithdifferentdispersiondegreesat0?Candatroomtemperatureof25?C.Theagglomerationmechanismsandtheirrelationshipwiththeemissionspectrawereuncoveredforthefirsttime.WiththeageingofZnOQDs,theagglomerationisaggravatedandthesurfacedefectsincrease,whichleadstothedefectemission.
简介:在瓷器革新驱动的发展策略下面,风险资本在城市的凝块集成和合作革新成为了一个重要驱动力。这份报纸使用社会网络分析为时期2005-2015在Beijing-Tianjin-Hebei城市的凝块分析风险资本的空间与时间的差别。一个严肃模型和面板数据回归模型被用来在这个区域在风险资本在空间与时间的差别上揭示影响因素。这研究发现在在北京的风险资本网络有某个轮转的变化和不平的区别--Tianjin-Hebei城市的凝块以全部的投资,并且风险资本(北京,Shijiazhuang和Tangshan)的三个中心在包围城市上有stimulatory效果;在城市之间的风险资本的流动显示某些联网规则,而是他们是慢的发展并且强烈向心;在信息基础结构开发和经济开发和风险资本投资的层次之间有强壮的积极关联;并且有相对不发达的金融环境和服务工业的地方不太能使用革新和entrepreneurship的水果并且吸引资金。这研究能在在中国与最好的革新能力造世界级的超级城市的凝块里为Beijing-Tianjin-Hebei城市的凝块充当一本参考书。
简介:由于它在集成地区性的协调开发并且提高华中的上升的大战略意义,在Changjiang(Yangtze)河的中间的活动范围的城市的凝块从理论、实际的方面吸引了许多注意。对区域经济网络结构的如此的研究为城市发展、地区性发展的策略的形成是有益的。这篇论文基于一个修改引力模型构造一个经济领带模型。随后,指社会网络分析,论文以经验为主地学习网络密度,网络中心性,亚群和Changjiang河城市的凝块的中间的活动范围的结构的洞经济网络。调查结果是四折的:(1)在Changjiang河的中间的活动范围的城市的凝块的一个经济网络被形成了,并且在在这个网络的城市之间的经济关系是比较地稠密的;(2)在Changjiang河的中间的活动范围的城市的凝块能被划分成四重要亚群,与有它的自己的明显的经济通讯的每亚群,当在亚群之中有不太经济行为的异质时,这为在波伊昂·莱克存在的二亚群是特别真的生态的经济地区;(3)由武汉,长沙和南昌的中央城市驾驶的一个经济模式出现在Changjiang河的中间的活动范围的城市的凝块,当这三个首都的城市施加了大放射能力到他们的包围城市时,后者不太能从前者吸收资源;(4)武汉大城市的区域和波伊昂·莱克生态的经济地区比长沙,Zhuzhou和Xiangtan城市簇的戒指有更结构的洞,意味着在这二个区域的圆周的城市是容易由中央城市抑制了。长沙,Zhuzhou和Xiangtan城市的戒指聚类有更少结构的洞;因此,在这个区域的城市不在另外的二个区域与那些比面对同样多限制。
简介:Chinahasexperiencedarapidurbanizationsincelate1970s.Thegreatincreaseofurbanpopulationhasresultedinvariousenvironmentalchanges,ofwhichurbanwatershortageandwaterenvironmentproblemshaveoc-curredinmostcities,especiallyintherapidlydevelopingurbanagglomerationsintheeasterncoastalregion.Thisresearch,takingShandongPeninsulaUrbanAgglomeration(SPUA)asacasestudyarea,analyzestheurbanizationexpansioninthelastdecades,discussesthewatershortageandwaterenvironmentchangesfollowingtherapideco-nomicdevelopmentandurbanizationsuchasgroundwatersinkingintheurbanandplainarea,seawaterandsalt-waterintrusioninthecoastalcities,waterpollutionoverspreadingandwaterecosystemdegradation,andputsfor-wardssomestrategiesforsustainabilityinpopulousregionswithseverewatershortage.SomecountermeasuresforsustainabledevelopmentofSPUAareputforward,suchasconstructingmodernwaterresourcesinter-citynetworkstoregulatewaterresourcebetweencities,adjustingurbanizationpolicyandurbanscaleplanningtopromotethede-velopmentofsmalltownsandmediumsizedcities,optimizingurbanindustrystructurebyrestrictinghighwatercon-sumptionenterprisesandstimulatingthegrowthoftertiaryindustry,improvingwateruseefficiencytoreducefreshwaterconsumptionandwastewaterdischarge,introducingeconomicmeanstowaterpricingandwatermanagementsystem,andrestoringecologicalconditionstostrengthenthenaturalwater-makingcapacity.