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1.
以福州空港物流与城市经济增长之间的关系为研究对象,选取福州空港2000~2014年旅客吞吐量,货物吞吐量,地区生产总值等统计数据,基于多元线性回归思路,建立地区生产总值与空港旅客吞吐量与货物吞吐量的二元线性回归模型,并通过统计分析验证该模型的有效性。经模型分析可知空港物流的发展与城市经济有着较强的相关性。  相似文献   

2.
福建省区域物流与区域经济的实证研究   总被引:1,自引:0,他引:1  
福建作为中国东部沿海地区经济最具活力的地区之一,通过大力发展现代区域物流业,促进了区域经济的增长,同时,经济的增长也带动了区域物流的发展.本文将采用误差修正模型及格兰杰因果检验,通过对1978~2010年福建省的经济指标时间序列进行协整分析,探讨福建GDP、物流产值、货物周转量、物流里程的协整关系,从而得出福建区域物流与区域经济增长之间的互动效应.本文发现区域物流的发展水平与区域经济增长存在长期均衡关系.  相似文献   

3.
运用回归分析法,选取货物周转量和旅客周转量作为主要的统计指标,对广西的物流与经济增长关系进行实证分析.结果发现,自1953年以来,物流弹性E随时间的变化大致呈上升趋势.这说明当前广西的物流弹性上升较快,物流能力的增长对区域经济的拉动作用明显,加大对物流能力的投入将能更好地发展广西的经济.  相似文献   

4.
交通拥堵是城市发展所面临的的困局之一,而货物物流需求的增长已成为影响城市交通的重要因素.利用某城市的交通货运区域划分图和货物流量矩阵对该区域的地下物流系统进行了设计;以该区域的物流吞吐量和区域需求量以及一级节点的转运率为优化目标,然后通过线性规划对偶问题方法给出节点选址方案,在节点部署位置的前提下,以最小化总体建设成本和运输成本为目标,以网络的连通性和管道服务能力为约束,给出多目标优化模型,并通过遗传算法实现ULS物流网络的构建.最后,针对该区域物流发展规律,以满足30年后的物流吞吐量为设计目标,给出了关键节点和关键物流链路,从而建立起网络建设的时序关系.  相似文献   

5.
区域物流产业对地区经济发展的推动作用日益凸显。以浙江省为例,采用灰关联分析方法,测度物流发展水平和若干影响因素之间的灰关联度,分析得到:港口物流对物流产业发展影响最大,对地区生产总值、信息化程度、产业结构等均有一定影响。根据所得结论,在浙江省大力发展海洋经济的背景下,对加快港口物流的发展提出了建议。  相似文献   

6.
文中在描述福州港地理环境、外贸基础设施建设以及统计了福州港近几年港口的吞吐量作为预测的基本数据;介绍了本文采用的预测方法—灰色模型GM(1,1)的理论基础和建模方法.采用了灰色模型,预测了福州港和福建省港口未来五年的货物吞吐量的预测值,提出福州港应利用自身优势建立国际物流中心来应对未来货物吞吐量俱增的对策,对福建港口物流业的发展具有借鉴意义.  相似文献   

7.
从2011年和2012年粤港珠三角区域的季度生产总值和空气污染监测网络子站监测月度数据出发,研究粤港珠三角区域的经济增长与空气污染之间的关系.为使数据统一,将季度的生产总值通过三次样条插值转变为月度生产总值.接着建立粤港珠三角区域的向量误差修正模型.然后运用格兰杰因果检验分析生产总值和空气污染变动的因果联系.结果表明粤港珠三角区域的生产总值与空气污染指数之间存在同向变化关系.  相似文献   

8.
港口货物吞吐量是港口物流的主要组成部分,对它的准确预测是确定港口规模建设的前提.根据舟山统计信息网提供的数据,整理得到宁波——舟山港2004年1月-2012年7月的港口货物吞吐量和外贸货物吞吐量.把货物吞吐量划分成训练集和测试集,分别用A'RIMA模型、分形预测方法、神经网络技术和支持向量机四种方法对该港的货物吞吐量进行了预测.以MATLAB为技术基础,对这四种方法进行了仿真计算.结果表明,四种预测方法均得到了满意的效果,但是利用神经网络预测误差较小,显示了神经网络模型在具有非线性随机的港口物流预测中的潜力.  相似文献   

9.
结合福建区域物流发展现状,运用灰色关联分析法,从物流供给和物流需求两个方面分析福建区域物流发展的影响因素。结果表明福建区域物流发展中需求因素对物流业发展起促进作用,而物流供给因素则相对不足,存在物流人才匮乏,港口优势未突出等问题。因此,应大力发展物流增值服务,加大物流人才储备,进一步突出港口优势,以促进福建区域物流的健康发展。  相似文献   

10.
海上运输承担着全球80% 以上的货物贸易运输,而集装箱化是大势所趋.因此,集装箱运输业的景气程度是世界经济与贸易发展的晴雨表,集装箱运输业的吞吐量增长情况直接体现着世界贸易的繁荣与发展.集装箱吞吐量预测可以支持政策制定者把握世界经济走势,跟踪经济波动的传导.同时,可以帮助管理部门和企业了解港口发展周期,把握港口发展趋势,科学制定港口发展战略,合理分配港口建设资源,促进当地经济社会发展.本研究基于TEI@I 方法论,对2014 年全球Top20 港口集装箱吞吐量进行了预测,进一步得到相关结论,并分析了2014 年全球各区域港口集装箱吞吐量的增长特点.  相似文献   

11.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.  相似文献   

12.
何延凌 《科技信息》2008,(4):258-258
Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly.  相似文献   

13.
The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3~4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰~ -7.8‰, PDB) and matrix dolomites (-6.6‰~ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084~0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078~0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.  相似文献   

14.
理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。  相似文献   

15.
As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.  相似文献   

16.
AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…  相似文献   

17.
There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.  相似文献   

18.
In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.  相似文献   

19.
正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-  相似文献   

20.
We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-  相似文献   

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