大连港在建设东北亚国际航运中心中的作用   总被引：4，自引：0，他引：4  

张耀光  王宁  赵永宏 《地域研究与开发》2006,25(1):19-22

从国际航运中心发展来看，港口是航运中心建设的基础。我国提出：“充分利用东北地区现有港口条件和优势，把大连建设成东北亚重要的国际航运中心”，根据振兴东北老工业基地对大连港今后发展的要求，探讨了今后发展的指导思想、发展目标、基础设施和港口建设布局，并提出了对策和相应措施。  相似文献   

产业集群概念理解的若干误区评析   总被引：28，自引：4，他引：28  

王缉慈  谭文柱  林涛  梅丽霞 《地域研究与开发》2006,25(2):1-6

文章针对在我国学术研究和媒体报道中关于产业集群概念理解中的一些误区进行评析。其误区主要是:(1)把产业集群等同于专业化城市;(2)把产业集群等同于产业部门或特色产业;(3)把产业集群等同于产业的投入产出链;(4)把产业集群等同于企业的地理邻近。文章指出,产业集群是在20世纪80年代中期以后在全球产业分工和信息技术革命条件下出现的产业地方化现象,是与产业区理论、区域创新系统理论等新区域主义学说联系在一起的。通过集群政策促进地方产业升级,首先需要地方政府准确理解产业集群的真正内涵。  相似文献   

东北老工业基地核心城市物流体系规划研究——以哈尔滨市为例   总被引：1，自引：0，他引：1  

朱庆伟  相伟  马双全 《地域研究与开发》2006,25(5):14-17

振兴东北老工业基地是我国重大区域发展战略之一，其关键环节在于促使核心城市快速发展，发挥其对区域的带动作用。文章以哈尔滨市为例，分析了核心城市物流发展对推动东北老工业基地振兴的基础作用。在运用城市物流规划理论与方法、借鉴国内外经验的基础上，结合城市发展需要和现存问题，对哈尔滨市城市物流体系规划进行了探讨，为其他城市的物流规划提供了一定的思路和模式借鉴。  相似文献   

Mantle plumes from top to bottom   总被引：5，自引：0，他引：5  

Norman H. Sleep 《Earth》2006,77(4):231-271

Hotspots include midplate features like Hawaii and on-axis features like Iceland. Mantle plumes are a well-posed hypothesis for their formation. Starting plume heads provide an explanation of brief episodes of flood basalts, mafic intrusions, and radial dike swarms. Yet the essence of the hypothesis hides deep in the mantle. Tests independent of surface geology and geochemistry to date have been at best tantalizing. It is productive to bare the current ignorance, rather than to dump the plume hypothesis. One finds potentially fruitful lines of inquiry using simple dynamics and observations. Ancient lithospheric xenoliths may reveal heating by plumes and subsequent thermal equilibration in the past. The effect at the base of the chemical layer is modest 50-100 K for transient heating by plume heads. Thinning of nonbuoyant platform lithosphere is readily observed but not directly attributable to plumes. The plume history in Antarctica is ill constrained because of poor geological exposure. This locality provides a worst case on what is known about surface evidence of hotspots. Direct detection of plume tail conduits in the mid-mantle is now at the edge of seismic resolution. Seismology does not provide adequate resolution of the deep mantle. We do not know the extent of a chemically dense dregs layer or whether superplume regions are cooler or hotter than an adiabat in equilibrium with the asthenosphere. Overall, mid-mantle seismology is most likely to give definitive results as plume conduits are the guts of the dynamic hypothesis. Finding them would bring unresolved deep and shallow processes into place.  相似文献   

Permeable Reactive Barrier for the treatment of contaminated surface water in Katedan industrial development area, Hyderabad, India     

Savitri Tripathi Vandana Parth Phani Homeshwari M. Vittal Babu N. Murthy N.N. Sorlie J.E. Govil P.K. 《中国地球化学学报》2006,25(B08):117-118

Permeable Reactive Barrier （PRB） is an emplacement of inert material （s） in the subsurface, designed to intercept a contaminated plume, provides a preferential flow path through the reactive media, and transforms the contaminant into environmentally acceptable forms to attain concentration remediation goals at the discharge of the barrier. The phenomena, which help in remediation within PRB, are adsorption/sorption, precipitation, oxidation/reduction and biodegradation. Various materials like zero-valent iron, zero-valent bi-metals, natural zeolites, organic carbon, fly ash, zeolites, limestone, activated alumina, apatites, etc. have been tried by many researchers to remove organic and inorganic contaminants. In USA, Canada, and many European countries commercial full-scale and pilot scale PRBs are successfully working. The design and installation of full scale PRBs needs laboratory treatability and dynamic flow column experiments？ The concept of PRB is being applied to treat contaminated surface water in the Katedan industrial area, Hyderabad, India. National Geophysical Research Institute （NGRI）, Hyderabad, India, conducted systematic studies in collaboration with Norwegian Geotechnical Institute （NGI）, Norway, to develop PRB technique to decontaminate the surface water pollution due to industrial effluent. A site assessment study in the Katedan Industrial Area, were carried out and water, soil and sediment from the lakes of the area were found to be polluted with high concentrations of heavy metals like As, Pb, Cr, Cd, Ni, etc. Adsorption studies at NGRI with synthetic samples and in-situ industrial effluent using different reactive media for removing contaminants like arsenic, chromium, cadmium, copper, nickel, lead and zinc have been carried out and yielded satisfactory results. The performance of zero-valent iron and limestone is encouraging in removing As,  相似文献   

Crustal structure of the Eastern Alps along the TRANSALP profile from wide-angle seismic tomography   总被引：1，自引：1，他引：1  

Florian Bleibinhaus  Helmut Gebrande 《Tectonophysics》2006,414(1-4):51

The objective of the TRANSALP project is an investigation of the Eastern Alps with regard to their deep structure and dynamic evolution. The core of the project is a 340-km-long seismic profile at 12°E between Munich and Venice. This paper deals with the P-wave velocity distribution as derived from active source travel time tomography. Our database consists of Vibroseis and explosion seismic travel times recorded at up to 100 seismological stations distributed in a 30-km-wide corridor along the profile. In order to derive a velocity and reflector model, we simultaneously inverted refractions and reflections using a derivative of a damped least squares approach for local earthquake tomography. 8000 travel time picks from dense Vibroseis recordings provide the basis for high resolution in the upper crust. Explosion seismic wide-angle reflection travel times constrain both deeper crustal velocities and structure of the crust–mantle boundary with low resolution. In the resulting model, the Adriatic crust shows significantly higher P-wave velocities than the European crust. The European Moho is dipping south at an angle of 7°. The Adriatic Moho dips north with a gentle inclination at shallower depths. This geometry suggests S-directed subduction. Azimuthal variations of the first-break velocities as well as observations of shear wave splitting reveal strong anisotropy in the Tauern Window. We explain this finding by foliations and laminations generated by lateral extrusion. Based on the P-wave model we also localized almost 100 local earthquakes recorded during the 2-month acquisition campaign in 1999. Seismicity patterns in the North seem related to the Inn valley shear zone, and to thrusting of Austroalpine units over European basement. The alignment of deep seismicity in the Trento-Vicenza region with the top of the Adriatic lower crust corroborates the suggestion of a deep thrust fault in the Southern Alps.  相似文献   

3-D seismic structure of the source area of the 1993 Latur, India, earthquake and its implications for rupture nucleations   总被引：1，自引：0，他引：1  

S. Mukhopadhyay  O.P. Mishra  D. Zhao  J.R. Kayal 《Tectonophysics》2006,415(1-4):1-16

The Latur earthquake (M_w 6.1) of 29 September 1993 is a rare stable continental region (SCR) earthquake that occurred on a previously unknown blind fault. In this study, we determined detailed three-dimensional (3-D) P- and S-wave velocity (V_p, V_s) and Poisson's ratio (σ) structures by inverting the first P- and S-wave high-quality arrival time data from 142 aftershocks that were recorded by a network of temporary seismic stations. The source zone of the Latur earthquake shows strong lateral heterogeneities in V_p, V_s and σ structures, extending in a volume of about 90 × 90 × 15 km³. The mainshock occurred within, but near the boundary, of a low-V_p, high-V_s and low-σ zone. This suggests that the structural asperities at the mainshock hypocenter are associated with a partially fluid-saturated fractured rock in a previously unknown source zone with intersecting fault surfaces. This might have triggered the 1993 Latur mainshock and its aftershock sequence. Our results are in good agreement with other geophysical studies that suggest high conductivity and high concentration of radiogenic helium gas beneath the source zone of the Latur earthquake. Our study provides an additional evidence for the presence of fluid related anomaly at the hidden source zone of the Latur earthquake in the SCR and helps us understand the genesis of damaging earthquakes in the SCR of the world.  相似文献   

The Tornquist Zone, a north east inclining lithospheric transition at the south western margin of the Baltic Shield: Revealed through a nonlinear teleseismic tomographic inversion     

P. Voss  K. Mosegaard  S. Gregersen  TOR Working Group 《Tectonophysics》2006,416(1-4):151

From July 1996 to August 1997 the TOR project operated 130 seismographs in North Germany, Denmark and South Sweden, with the aim of collecting signals from local, regional and teleseismic earthquakes. This data set is particularly interesting since the seismic antenna crosses the most significant geological boundary in Europe, the Tornquist Zone, which in the northern part is the border between the Baltic Shield and the younger European lithosphere. Previous studies have shown significant physical changes in the crust and upper mantle across this transition zone, including two independent teleseismic tomographic studies of the TOR data set. But these two studies disagree on the orientation of the slope of the transition. Both studies used an iterative linearized inversion method. We will in this work Preprint submitted to Elsevier Science 27 July 2005 present an inversion based on Bayesian statistics, where the solution space is examined in order to study a very large number of tomographic solutions and to examine the solution uniqueness and uncertainty. The method is applied to measurements of 3345 relative teleseismic P-phase travel times from 48 teleseismic earthquakes with good azimuthal coverage with respect to the great circle arc of the TOR array. We find the lithospheric transition to be a north east inclination of around 30° to 45° off vertical.  相似文献   

中国地区制造业竞争力类型划分   总被引：4，自引：0，他引：4  

千庆兰  陈颖彪 《地理研究》2006,25(6):1050-1062

借鉴国内外相关研究,遵从科学性、系统性、动态性和可操作性原则,针对我国区域经济特点,从规模、市场、效率、成长、结构和创新6方面选取11个指标构建我国地区制造业竞争力评价指标体系,以省区为单位,从宏观层面划分我国地区制造业竞争力类型,旨在对不同类型区制造业竞争力的提升提供理论依据。研究表明:根据竞争力综合指数,1985年和2003年我国各省区制造业竞争力均可划分为最强、较强、一般、较弱和最弱五类;结合近20年来各省(市、区)制造业综合竞争力在全国的位次变化,可将其划分为高水平稳定型、较高水平波动型、低水平波动型和较低水平振动型四类;根据竞争力内部结构,可将其划分为绝对市场主导型、强创新弱市场型、规模-成长主导型、结构基本均衡型和结构特殊不均衡型五类。  相似文献   

欠发达地区工业园区发展动力机制与实证研究     

任登峰  郑林  王志国 《地域研究与开发》2006,25(1):49-53

随着沿海发达地区民间资本积累的不断增加和产业结构的高度化，大量的民间富余资本从沿海发达地区流向内陆欠发达地区，众多的制造产业也开始大规模地向中西部欠发达地区转移。在这一背景下，欠发迭地区的工业园区建设如火如茶。为了总结欠发达地区工业园区建设的成功经验，并进一步探索工业园区发展的内在规律，文章从分析欠发达地区的经济社会特征入手，通过区位、成本、政府作用、外部辐射及制度文化因素等多个方面对其发展的动力机制做了较为深入的探究，并结合实例对理论分析作了初步验证。  相似文献