共查询到18条相似文献，搜索用时 250 毫秒
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文章在对港口与腹地经济耦合协调发展机理分析的基础上,构建了港口与腹地经济协同发展模型和"港口-腹地经济"复合系统指标体系,并采用PLS通径模型测度了2000-2014年环北部湾地区"港口-腹地经济"复合系统及其各子系统协调发展水平。研究表明:考察期间内环北部湾地区"港口-腹地经济"复合系统及其子系统协调发展水平呈现出逐步递增的态势,其中港口子系统增长较快,是复合系统协调发展水平增长的重要保证;湛江港口子系统及其复合系统发展水平明显高于广西北部湾其他3地区;4地区腹地经济子系统协调发展水平基本持平。 相似文献
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港口物流和港口经济对腹地经济以及国民经济的促进带动作用日益突出,如何利用港口这个切入点发展腹地经济以及如何发展港口物流业来提升港口竞争力已成为各大港口的重要课题。文章利用2007年的统计数据对我国沿海各主要港口物流竞争力指标通过因子分析法进行横向比较,找出大连港物流竞争力的优势和劣势,为政策的制定和实施以及大连港物流竞争力的进一步提高提供依据。 相似文献
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为充分发挥粤港澳大湾区港口的竞争优势,促进港口经济的协调发展,文章基于粤港澳大湾区主要港口的实际情况,构建供应链博弈模型并进行数值仿真,研究相关因素对深圳港和香港港绩效的影响。研究结果表明:随着商品价格和库存成本的提高,货物从深圳港向香港港转移,但转移幅度逐渐趋缓;深圳港在中低端商品的货源收集方面具有明显的竞争优势,而香港港对高端商品的吸引力更强;货运结构逐渐向中高端商品过渡对于提高港口收益具有促进作用,其中深圳港应通过降低商品库存成本而降低经营风险;深中通道和港珠澳大桥通车有效缩短腹地运输时间,对于绝大部分商品价格和库存成本组合都将提高粤港澳大湾区港口的总收益。 相似文献
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1994年世界贸易增长率由上年的3.5％增至8.9％,从而带动了世界海运贸易繁荣。据海运权威机构“费恩来”统计,1994年世界海运量达到创纪录的44.75亿吨,比1993年增长了1.36亿吨,增幅达3.1％(1993年的增幅为2.8％)。与之相比,1994年世界海运周转量增幅略低于运量,为2.8％,达195 000亿吨海里。 1994年世界原油海运量温和增长,由1993年的13.56亿吨增至13.8亿吨。成品油运量由 相似文献
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青岛国际航运中心构想 总被引：2，自引：0，他引：2
当今世界海洋运输特别是集装箱运输迅猛发展，急需海港同步发展。青岛具有优良港口资源和地理区位优势及广阔丰富的经济腹地，可持续发展为国际航运中心。 相似文献
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近年来,随着国家资源管理体制改革的加快,海域资源市场化配置程度不断提高,海域招拍挂即将成为海域使用权出让的主要方式。对海域基准价格进行研究,可以科学确定海域使用权的价格,为海域资源市场化配置提供科学支撑。本文建立了海域定级和海域基准价格评估方法,并利用建立的方法评估了厦门市货运港口用海、客运港口用海、游乐场用海和游艇泊位用海的海域基准价格。结果显示,厦门市各级各类海域基准价格差异很大,各地区各类用海的海域基准价格在11.04～89.32万元/公顷之间。从区域看,同一区域不同用海类型的海域基准价格相差很大,厦门岛周边海域基准价格普遍较高,与陆域的经济发展水平相对一致;从用途看,同级别海域游艇泊位用海年均海域基准价格最高,货运港口用海最低。 相似文献
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利用规模优势降低成本是海洋运输业经营行为的基本逻辑,在当前的经济形势下,不确定性的增加促使厂商寻求更加灵活的合作方式来实现这一目标。文章利用面板向量自回归方法对班轮企业的合作行为进行了分析,结果显示:企业间的合作行为对运量的提升有正向的促进作用,但没有显著的长期效果。运价的提升会促进企业间的合作行为,这种影响具有长期性和系统性的特征,但会随时间逐渐弱化,冲击反应的结果显示大部分的冲击反应呈震荡衰减的趋势,其中合作投入的变化仅在短期内对运量产生影响。 相似文献
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《Marine Policy》2002,26(3):167-178
The past, present and expected future growth rates of freight transport have led the European Union to promote a common transport policy supporting the shift of goods from road to sea, thereby making use of the latter's underused available capacity. Therefore, the provision of a door-to-door transport service, where a sea-leg is introduced, requires both the complementarity of the other modes of transport and the implementation of the concept of mode interoperability. The latter provides for the smooth transfer of goods since wastes, which are represented in terms of friction costs, are eliminated or reduced to a minimum. However, to implement that shift it is necessary to appreciate the strengths and weaknesses of short sea shipping (SSS), so that the right strategies are identified, though a list of possible measures to utilise this mode has already been identified. A new approach to SSS is also introduced to clarify some concepts attached to it. 相似文献
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文章以环渤海地区17个沿海城市和27个内陆城市为研究对象,系统构建旅游产业发展指数评价体系,采用综合指数评价模型、改进的引力模型和Arcgis10.0地理空间分析等方法,测度环渤海地区沿海与腹地旅游空间联系强度,揭示海陆旅游产业的相互作用关系和时空演化态势。研究表明,环渤海地区沿海城市旅游产业发展水平普遍高于内陆城市,时序上海陆系统的联系逐渐增强,空间上呈现局部聚集和整体分异态势;区域经济发展水平、旅游资源禀赋基础和交通运输体系建设是影响沿海与腹地旅游空间联系强度的主要因素。进而提出促进跨区域产业融合和资源配置、优化旅游开发空间格局、建立整体营销机制等对策建议,以期推动环渤海地区沿海与腹地旅游产业的协同发展。 相似文献
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One of the major drawbacks of the conventional method of land reclamation, which involves mixing cement with the dredged soils at the disposal site, is the high cost associated with its manufacturing and transportation. In this study, a new solidified dredged fill (SDF) technique and a new additive are proposed and their practical applications are discussed. Unlike the conventional approach, the dredged marine soils were mixed with the solidifiers using a newly designed mixing technique prior to its transport to site, which would significantly reduce the cost of site machinery and effectively reclaim land with adequate engineering properties necessary for the construction of infrastructure. To evaluate the performance of the reclaimed land using the proposed technique, a series of laboratory and field tests (namely, static and dynamic cone penetration tests, and plate load tests) were conducted on grounds filled with and without solidified dredged marine soils, respectively. The results showed that the engineering behavior of the reclaimed land with dredged marine soils using SDF technique had significantly improved. The SDF technique combined with the newly designed mixing system improved the performance of ground and has thus proved to be both cost-effective and safe. 相似文献
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In this work, the possible exploitation of fiber-reinforced composites in the context of maritime transportation of compressed natural gas (CNG) is investigated. In addition to a more conventional steel configuration, two different fiber materials, carbon and glass, are considered as construction materials for pressure vessels (PVs) to be stored on board ships, with thickness optimized by FEM analysis.The considered scenario is represented by the transportation of CNG from an offshore well to a terminal on shore. Fleets of ships carrying CNG in pressure vessels manufactured with the investigated materials are generated by means of a ship synthesis model (SSM) software and compared on the basis of technical and economical indicators.The choice of the construction material influences considerably the weight of the PVs, which represent a major item of total ship weight and reflects directly on the general transport performances in terms of resistance, seakeeping and reliability in the service. On the other hand, capital as well as operating expenditures are considerably affected by the choice. When exploring the design space, the ship synthesis model is able, at a preliminary stage of the design, to account for the various technical and economical aspects, their implications and relationships. Results are presented of computations carried out in a specific case, identified by the annual gas production and other characteristics of the well terminal and a cruising route for the ships. The comparison is carried out on the basis of the cost per transported unit of gas and of the percentage of success in the transportation process. The computations show that the choice of the PV material has a key influence on the results in terms of optimal number, dimensions and speed of the ships. 相似文献
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时间服务系统对利用走时层析成像方法进行地下介质速度结构反演至关重要。海底地震仪(ocean bottom seismometer, OBS)工作期间由于没有GPS时间接入, 其时间误差(包括守时误差和授时误差)主要来源于内部石英晶振的准确程度, 受到外部环境变化以及开关机等因素影响。长期实践发现, 部分国产OBS在记录气枪信号以及天然地震信号时存在较大的时间偏差。本文对2019年福建及台湾海峡地壳结构海陆探测实验所获得的53台次国产OBS记录进行了时间服务系统矫正。其中, 针对OBS授时误差, 利用出海前不中断采集的一致性试验和运输船运输过程中产生的晃动互相关进行时间矫正; 针对守时误差, 采用计算实际采样频率与理论采样频率偏差进行矫正; 通过对比矫正前后OBS记录到的天然地震信号, 进行秒级别的检测。结果表明, 经过以上步骤矫正的OBS数据, 其时间记录的准确性得到了显著提高, 从而降低了震相识别、走时拾取的时间误差, 为标准化国产OBS数据采集作业流程提供了重要参考。 相似文献