Impact of coupling coordination development of port and city environments on urban economic competitiveness:Evidence from the coastal port cities in eastern China

Promoting the coupling coordination development of port and its hinterland city environments is an important way to improve urban economic competitiveness.Based on relevant data of 13 coastal port cities in eastern China from 2000 to 2018,this study explores the coupling coordination development of port and city environments and its impact on urban economic competitiveness by constructing the coupling coordination degree model and the panel threshold model.The research results show that:(1)In terms of the coupling coordination development of port and city environments,most coastal ports and their hinterland cities are in a state of moderate or serious disorder.Overall,the degree of coupling coordination of port and city environments needs to be further improved;(2)The coupling coordination degree of port and city environments has a significant impact on urban economic competitiveness,and this effect gradually increases with the development of the ports and the urban economy.Among the variables that impact the urban economic competitiveness,fixed assets investment and foreign trade are significant factors that can enhance urban economic competitiveness.(3)At present,there is a“U-shaped”relationship between the coupling coordination degree of port-city environments and the urban economic competitiveness.This relationship lies on the right side of the inflection point of the“U-shaped”curve.Therefore,following the concept of assigning priority to ecological development,expanding fixed assets investment and actively developing foreign trade can further enhance the urban economic competitiveness.

Function Evolution and Landscape Planning Strategy of Inland Rivers in Beilun Port City of Ningbo

In the history, the main roles of inland rivers in Beilun Port City of Ningbo were desalination,blocking tides, shipping, and flood control. Nowadays, with the continuous spread and deepening ofurbanization, the ecological environment of river courses has been destroyed. In the past, remediationmeasures based on engineering and technology played a certain role, but can not “cure the root cause”. Itshould respect the historical evolution process of river courses, and highlight the ecological service functionand leisure tourism value of river courses from the coordination perspective of urban and rural ecologicalenvironment, economic industries, society and culture in the planning ideas of ecology, production, andlife integration. Four aspects of the measures are as below: protecting and repairing the ecological matrixof river courses;building green space system and maintaining flood control functions through the waternetwork;protecting cultural heritage along the rivers;developing waterfront leisure tourism scenic area.

Spatial Pattern and Heterogeneity of Port & Shipping Service Enterprises in the Yangtze River Delta,2002–2016

Using the ‘theoretical hypothesis—empirical study—case verification' method, this paper studies the spatial distribution and differentiation of port & shipping service enterprises(PSSE), as well as the variation process and underlying mechanism in the Yangtze River Delta(YRD). First, through inductive and deductive reasoning, we propose the following hypothesis: the regional distribution of different types of PSSE would show different spatial agglomeration-decentralization tendency; and there would be distinct regional differentiation in the industrial structure of the enterprises. Second, based on data obtained from enterprises, empirical research is conducted using Gini coefficient and spatial interpolation simulation methods. Results show that: 1) The overall enterprise distribution is decentralized within a city. 2) Different types of enterprises show different spatial agglomeration-decentralization tendencies. At 3000 m×3000 m grid scale, there is an agglomeration tendency along seas and rivers in the spatial distribution of enterprises. Shanghai has been identified consistently as a hot spot. 3) There is significant regional differentiation in 12 port cities with respect to the industrial structures of enterprises. Finally, the transportization and the increase of shipping service demand, the globalization and the expansion of multinational corporate activities, the hierarchization and the cooperation among port cities as well as the decentralization and the behavioral difference between the central and local states can be seen as main driving mechanism of the spatial phenomenon.

Strategic Study on Integration of Port and City Development in Rizhao

agglomeration of the Yangtze Delta （UAYD）, one of the most developed regions of China, has witnessed an increasing prevalence in building ecological cities when the ecological cities are pursued by many modern cities, and great achievements have been made in this regard. It is inevitable, however, that certain problems exist during the construction of ecological city, which include but not limited to non-harmonious development of urban complex ecosystem, and the difficulty in quantifying eco-city construction or incomplete quantification in assessing the con- structiori of present and future eco-city. Based on the analysis on social-economic conditions and regional conditions of the UAYD, this paper attempts to set up an index system of eco-cities combining with local characteristics, and to adopt the indices of eco-city, urban harmony, and eco-city colligate to evaluate the ecological level, urban harmonious development and eco-city construction of cities within the UAYD. Results indicate that among 15 cities in UAYD, Suzhou City ranks the highest in terms of eco-city construction, whereas Nantong ranks relatively lower; sustainable eco-city construction is possible only when cities are developed in every respect of harmony.

Path for the “Interaction between Industrialization and Urbanization” in Low Hilly Areas of Sichuan Against the Background of New Urbanization: A Case Study of Overall Planning of Lianjie Town in Weiyuan County

Taking the practical experience of Lianjie Town, Weiyuan County for example, this paper analyzed regional characteristics of the low hilly areas in Sichuan and interaction mechanism of "industrialization and urbanization", explored the path for the interaction between industrialization and urbanization from 5 perspectives, namely accelerating industrial upgrading, optimizing industrial structure, breaking through the dual system, industry back-feeding town, and protecting ecological background.

Expansion Plans for the Port of Durban： What Are the Issues for the City of Durban？

The Port of Durban is one of the largest ports in the Southern Hemisphere and is the main port for the Southern African region. However, the port is reaching its capacity limit and it is apparent that for South Africa＇s economic growth this port needs to expand. In order to expand the port needs to not only expand its waterside infrastructure but it would need to provide new logistics corridors though the city of Durban. The city of Durban has completely surrounded the port making expansion options difficult and intertwined with the planning of the city. This paper examines the various options and timelines for port expansion as well as the issues from the city perspective. Areas of possible conflict in this process revolve around traffic capacity and related road/rail infrastructure, environmental issues, social and economic impacts.

Introduction to the Port City of Seattle

Seattle Located on a neck of land between the Elliott Bay (the Puget Sound) and Lake Washington, Seattle is a major city of Washington State and the largest metropolis of the Pacific Northwest in the USA. It is a port of entry and gateway to Asia and Alaska. The city has an area of 84 square miles and a population of about 516,000 (1992), with a density of 10,879 per Square mile.

BORDER PORT MANZHOULI:URBAN FUNCTION AND SPACE DEVELOPMENT

Manzhouli is the largest land port city on the Sino-Russia border,transit cargo through the land port amount -ed to 5.95million tons,transit tour ists were 304500in 2000.It stands at the joint place of China,Mongolia an d Russi-a,faces to Siberia area of Russia,re ceives direct support from the North east China and Bohai Sea Rim Area,and possess-es priorities in geographical location,land port infrastructure,wate r resources,coal resources,touris t resources and great potentiality in economic coop eration with Russia.The future urban function is a key port on the First Eurasia Continen-tal Bridge.Manzhouli Port will keep its first place between China and Russia land transport,and it is forecasted that the transit amount through Manzhouli Port will go up to 10million tons in 2005and 20million tons in 2010.It will be construct-ed to be a trade center of the peripheral area extending to Russia and Mongolia,a key export-oriented processing industri-al zone supported by industries such as export processing industries,export agriculture,trade services,t echnology trad-ing and the other service industries.It keeps being a well-known touring city for trade,shopping,sightseeing,vocation,local food,recreation and cultural events.To build Manzhouli Export Pr ocessing Industry Zone will improve city econom-ic structure,and the main sectors are organic food processing,livestock products processing,garment and f urniture indus-try.Moreover,Manzhouli Export Pro cessing Industry Zone will eventually be upgraded to be a border free trad e zone.The city functional transition will inevitably affect urban spatial restructure and its expansion.The city space transforma-tion will develop as such:one develo pment axis of No.301highway paralle ling with Bin -Zhou(Harbin -Manzhouli)rail-way which cuts through central part o f Manzhouli City,and links Zhalainuoer District with central city;thre e urban units including central city,Zhalainuoer District and Manzhouli Interchange Trade Zone;cohesion with Aoerjin a nd Cuogang pastures;regional dual-nuclei str ucture of Hailaer City and Manhzouli City;and the Manzhouli-Zabaykalsk Free Trade Zone.

Research of the morphology of Zhejiang coastal port cities

Lince port cities are the first new force of China's economy to outside world, they have been developing rapidly under the open policy In this article, Zhejiang's coast port cities are taken as research subject Through intensive analysis of a great number of data which had been obtained during onthespot investigations, the regional conditions, superior and inferior conditions for development of Zhejiang's coast port cities are systematically surveyed, the development of their overall distribution trait, internal structure morphology and outer morphology is examined and the development trend of port city allocation is identified which provide theoretical basis for the further development of port cities

Zhangjiagang——A Modern Port City

Zhangjiagang, located on the lower reaches of the Yangtze River and an important military town in ancient times, was previously under the. jurisdiction of Shazhou County. It became Zhangjiagang City in 1986, named after Zhangjiagang, a natural port in the area. With fertile soil, a good climate and sufficient rainfall, Zhangjiagang is a production base for high yield grain and good quality cotton. In addition, it is renowned for its variety of river food, chicken, peaches, grapes, wine, water melons and tea.

Identification of major sources controlling groundwater geochemistry in Mount Makabaï in the Far-North of Cameroon(the northernmost part of the Pan-African Belt)

The present work focuses on the volcanic basement rock geochemistry of Mount Makabaï(MarouaCameroon city)in relation to groundwater geochemistry.Investigations were centered on an approach involving an association of several methods such as geological cartography,hydrogeology,and geochemistry.Three rock samples,four disturbed soil samples,three undisturbed soil samples,and 20 samples of groundwater in 10 wells were collected during fieldwork and prepared for laboratory analyses.Bedrocks exhibit porphyritic,aphyric,and subaphiric textures.The phenocryst phases are mainly olivine,clinopyroxene,and plagioclase.Based on whole rock major element chemical compositions,the Makabaï samples,plotted on Na_(2)O+K_(2)O versus SiO_(2)diagram,are mugearite,hawaiite,and basalt.The ratio of(MgO+CaO)/(Na_(2)O+K_(2)O)exceeds unity and shows dominance of alkaline Earth metals(MgO:2.99-4.48%;CaO:6.19-9.80%)relatively to alkali metals(Na_(2)O:2.27-4.46%;K_(2)O:2.09-2.51%).Exchangeable base contents are high,mostly represented by Ca and Mg,whose contents vary from 14.6 to 35.28 cmol(+)kg^(-1)and from 3.28 to9.48 cmol(+)kg^(-1)respectively.The CECclayis likewise high,fluctuating between 116.80 and181.38 cmol(+)kg^(-1),values in line with the presence of 2:1 clay minerals represented in the study area by montmorillonite.In the water samples,the Ca2+and Na+contents are generally higher than K^(+)and Mg^(2+),reflecting the relative abundance of Na_(2)O and CaO oxides to K_(2)O and MgO oxides in rocks where different waters were sampled.The waters of Makabaï are acidic to neutral(6.3≤pH≤7.4)and weakly to highly mineralized(110.0≤EC≤1190.0μS/cm).Hydro-geochemical classification by using the Piper diagram revealed two water types:(1)CaMg-HCO_(3)(40%)and(2)CaMg-Cl or CaMg-SO4(60%).The average content of ions in all the analyzed samples was HCO_(3)^(-)>>NO_(3)^(-)>SO_(4)^(2-)>Cl-for anions and Ca^(2+)>>Mg^(2+)>Na^(+)>K^(+)for cations.Major mechanisms governing ionic constituents of groundwater in the study area are water-rock interactions,silicate weathering,and ion exchange.

Ar^+/Ar, O_2^+/O_2 and N_2^+/N_2 Elastic Momentum Collision Cross Sections: Calculation and Validation Using the Semi-Classical Model

The aim of this paper is to obtain relevant sets of collision cross sections of the parent ions in low pressure discharges in argon, oxygen, and nitrogen, i.e., Ar＋ in Ar, O2＋ in O2 and N2＋ in N2. These ion data are first discussed and then validated from comparisons between the calculated transport coefficients and those measured in the literature. The elastic momentum transfer collision cross sections are determined from a semi-classical approximation for the phase shift calculation based on a 12-6-4 inter-particle potential while ion transport coefficients are determined versus the reduced electric field from Monte Carlo simulations.

Saigon River Valley: A Navigation, Trade, Mitigation, Invasion, Liberation, and Unification Pathway

The Saigon River is located in southern Vietnam with headwaters starting in southeastern Cambodia. The river flows southeast for about 225 km to the South China Sea. Most readers of Vietnam’s history know about the American-Vietnam War (1965-1973). However, centuries before that time, Vietnam fought with the Chinese, the Khmers, the Chams and the Mongols. The history of Vietnam begins in the Red River Delta, where farmers first cultivated rice. A millenia of struggle against the Chinese then followed. The Saigon River Valley was the pathway used by the North Vietnamese Army (NVA) to get from the Ho Chi Minh Trail in Cambodia to Saigon during the 1968 Tet Offensive. The NVA dug Cu Chi and Iron Triangle soil tunnels near Cu Chi in the Old Alluvium terrace to hide from American Forces and Air Force bombers. In 1962, the Tan Son Nhut Air Force base on the northern edge of Saigon received the first shipments of Agent Blue, the arsenic based herbicide, used to destroy the rice crop. The most dioxin TCDD and arsenic contaminated site in Vietnam was Bien Hoa Air Force base on the Saigon River just 30 km northeast east of Ho Chi Minh City. The adjacent Bien Hoa City has a population of over 800,000. The Port of Ho Chi Minh City is the most significant river port in Vietnam and Southeast Asia. The river is navigable by ships which draft up to 9 m. Vietnam only became a united country in the 19th century. Its independence was soon affected by French colonialism and then the destructive American intervention in the Vietnam War. The Vietnam War Archive no. 2 in Ho Chi Minh City houses residual correspondence between the Republic of Vietnam (RV) President Diem’s administration and US President Kennedy’s administration related to the Khai Huang program (hamlet strategy). In addition, the archive contains some of the tactical herbicide spray records of the RV military for the Mekong Delta. The primary objective this study is to document the role that the Saigon River Valley played, in modern warfare. The Saigon River Valley was used as a navigation, trade, invasion, liberation and unification pathway. The Vietnamese people have survived centuries of stormy, troubled times and their power of character has served them well.

国内外陆港研究进展与我国研究前景展望——基于CiteSpace知识图谱分析

基于WOS及CNKI数据库,依托CiteSpace可视化文献计量工具,构建陆港研究进展知识图谱,在分析我国陆港发展演化阶段基础上,对陆港研究进展进行评述与展望。研究发现:近年来,国内外陆港研究发展较快,研究发文量日益丰富,研究热点不断更新。当前研究的重点和热点主要体现在陆港的内涵与外延、陆港建设背景下的集装箱多式联运网络、港产城联动机理等方面,以面向陆港规划和建设阶段研究为主。但在陆港概念上结合我国陆港发展的集群化、产业化特征的研究还不够;在陆港多式联运网络方面,还缺乏对陆港选址、多式联运通道等的点、线、面协同优化的研究;在港产城联动机理方面主要以经济互动实证研究为主,缺乏对港产城联动模式的研究。未来研究应重点关注丰富陆港概念新内涵、构建陆港联运网络、拓展港产城共生演化等方面新问题的研究,使陆港研究伴随实践的发展不断深入。

社会交往内卷化对进城农民工就业质量的影响研究

实现农民工高质量就业是解决收入不平等、实现共同富裕的一个重要途径。文章基于2017年中国流动人口动态监测调查(CMDS)数据,构建OLS、Probit回归模型探讨了社会交往内卷化对进城农民工就业质量的影响和作用机制。研究发现,社会交往内卷化显著抑制进城农民工就业质量的提升,分维度回归结果显示,社会交往内卷化抑制了农民工劳动合同的签订以及医疗保险的获取,同时也增加了工作时间,但并没有发现社会交往内卷化对其工资水平有不利影响;机制检验表明,社会交往内卷化通过降低居留意愿、减少工会参与、强化就业歧视而抑制进城农民工就业质量的提升;异质性分析显示,社会交往内卷化对“新生代”农民工就业质量的影响更大。因此,应当加深进城农民工的城市融合,优化制度设计并加强劳动监管,推动农民工居留意愿长期化,增加教育培训投入等。

考虑建筑群-沉积盆地动力相互作用的建筑群震害评估方法

我国大量城镇位于沉积盆地,沉积盆地对地震动具有显著的幅值放大和持时增长效应,同时沉积盆地与建筑群间的动力相互作用将导致地震动空间重分布。针对此问题,本文提出了一种考虑建筑群-沉积盆地动力相互作用的建筑群震害评估方法:首先,以剪切层模型、弯剪耦合模型等简化力学模型模拟建筑结构,计算建筑群-沉积盆地动力相互作用,获得建筑群的基础顶面地震动;然后,基于精细化有限元模型分析典型单体建筑的地震易损性;最后,结合所求建筑群元模型模拟建筑结构时,上部建筑对基础顶面地震动的影响具有等?效?性,因此所建方法适用于考虑建筑群-沉积盆地动力相互作用的建筑群震害评估;建筑群-沉积盆地动力相互作用主要导致盆地内地表地震动峰值降低,但局部位置会在盆地效应基础上产生附加放大效应;建筑群-沉积盆地动力相互作用导致不同地表点地震动加速度反应谱峰值相差3倍,同时放大邻近建筑出现相同等级震害的概率差异,所分析算例中,在是否考虑建筑群-沉积盆地动力相互作用的情况下,邻近四栋相同框架结构发生中等损坏的概率范围分别为66%—92%和87%—93%,此结果与实际震害中建筑结构交替破坏的现象一致。

“城市治理”与“智慧城市”的交互文献计量及发展思路进路

为了掌握城市治理与智慧城市的研究进展,探究我国城市治理与智慧城市的研究热点和研究演变,对中国知网内城市治理与智慧城市相关中文文献进行可视化分析,目的在于深入探究中国城市治理与智慧城市发展的现状以及未来发展趋势,以期能够更加深入地研究二者之间存在的关系,从而更好地指导我国的城市治理和智慧城市的建设。智慧城市既是城市治理的必由之路,也是城市治理的必然结果;打造数字孪生城市,实现智慧城市建设的超高速迭代创新;特大城市精细化治理是城市治理的创新引擎和未来范本;夜间旅游与智慧应急成为城市治理与智慧城市发展的潜在可能性。

内陆城市发展口岸经济提升双向开放水平研究——以石家庄市为例

口岸是内陆城市发展开放型经济的重要支撑。近年来石家庄市对外贸易持续走强、口岸功能不断拓展、改革创新能力增强、招商引资态势向好。但在口岸经济发展中仍存在管理体制协同性不够、缺乏战略统筹、口岸功能相对较少、口岸与腹地产业互动不足、营商环境有待提升等问题。针对这些问题,提出以重点工作专班推动体制机制破冰突围、做强口岸功能、创新推行服务企业专员制度、树立“项目为王”理念并打造强势专业招商团队、构建人才支撑体系等改进对策。

港城环境协调发展对城市经济竞争力影响的门限效应分析

基于2000~2021年中国东部地区13个沿海港口城市相关数据,构建协调度模型和面板门限模型,探析港城环境协调发展及其对城市经济竞争力的影响。研究结果表明:1)在港城环境协调度等级上,东部地区大多数港口与其腹地城市处于中度失调或严重失调阶段,整体上港城环境协调发展程度有待提升;2)港城环境协调度对城市经济竞争力具有显著影响,并且随着港口和城市经济发展,这种影响效应略微减弱,在协调度的影响变量中,固定资产投资、对外贸易是提升城市经济竞争力的显著因素;3)目前沿海港口城市港城环境协调度和城市经济竞争力之间呈“U”型关系,且处于“U”型曲线拐点右侧,因此,需坚持生态优先发展理念、扩大固定资产投资和积极发展对外贸易,以进一步提升城市经济竞争力。