Spatial Structure of China's E-commerce Express Logistics Network Based on Space of Flows

The intermediate link compression characteristics of e-commerce express logistics ne tworks influence the tradition al mode of circulation of goods and economic organization,and alter the city spatial pattern.Based on the theory of space of flows,this study adopts China Smart Logistics Network relational data to build China's e-commerce express logistics network and explore its spatial structure characteristics through social network analysis(SNA),the PageRank technique,and geospatial methods.The results are as follows:the network density is 0.9270,which is close to 1;hence,indicating that e-commerce express logistics lines between Chinese cities are nearly complete and they form a typical network structure,thereby eliminating fragmented spaces.Moreover,the average minimum number of edges is 1.1375,which indicates that the network has a small world effect and thus has a high flow efficiency of logistics elements.A significant hierarchical diffusion effect was observed in dominant flows with the highest edge weights.A diamond-structured network was formed with Shanghai,Guangzhou,Chongqing,and Beijing as the four core nodes.Other node cities with a large logistics scale and importance in the network are mainly located in the 19 city agglomerations of China,revealing the fact that the development of city agglomerations is essential for promoting the separation of experience space and changing the urban spatial pattern.This study enriches the theory of urban networks,reveals the flow laws of modern logistics elements,and encourages coordinated development of urban logistics.

Delivery Invoice Information Classification System for Joint Courier Logistics Infrastructure

With the growth of the online market,demand for logistics and courier cargo is increasing rapidly.Accordingly,in the case of urban areas,road congestion and environmental problems due to cargo vehicles are mainly occurring.The joint courier logistics system,a plan to solve this problem,aims to establish an efficient logistics transportation system by utilizing one joint logistics delivery terminal by several logistics and delivery companies.However,several courier companies use different types of courier invoices.Such a system has a problem of information data transmission interruption.Therefore,the data processing process was systematically analyzed,a practically feasible methodology was devised,and delivery invoice information processing standards were established for this.In addition,the importance of this paper can be emphasized in terms of data processing in the logistics sector,which is expected to grow rapidly in the future.The results of this study can be used as basic data for the implementation of the logistics joint delivery terminal system in the future.And it can be used as a basis for securing the operational reliability of the joint courier logistics system.

Logistics Implications of Urban Road Pricing

Urban road pricing schemes are becoming increasingly popular among researchers and politicians as they promise a handle on increasing inner city traffic and economy as well as sustainable improvements for cities facing huge congestion and pollution problems. As in the cases of London and Stockholm, many European cities are going to implement such toll systems, especially as also the European Commission is voting for such pricing schemes in the recent white book on transportation and traffic, This research therefore provides a description of different urban road pricing schemes, their cost implications for city （last mile） transport as well as the decision and management options derived from these schemes for logistics companies. These options are furthermore checked regarding their advantages and disadvantages under the described toll schemes.

Improvements of City Logistics Methods in Thriasio Area, Greece

Urban freight transport is a very important part of the logistics chain. Creating the right conditions for the economic and commercial development of urban transport is extremely important. The purpose of this paper is to explore the concept of city logistics while presenting the situation in Greece, a country lagging in the implementation of good practices, and some suggestions for improving the existing reality of urban transport. In order to achieve the objectives of the present work, a review of the relevant literature and primary research, was conducted through personal interviews for the implementation of urban freight transport. The results, according to the literature, have shown that designing the right way and organizing an appropriate route for the product increases the quantities produced that are shipped for sale, either directly from the producers, through traders, suppliers, or logistics companies, which simply carry the products. Wrong design, on the other hand, leads to a complex system with significant losses, both in cost and quality. Also, according to primary research, businesses now active in the Thriasio area report the importance and positive impact they have had on the wider local community, as well as that urban shopping centers play a very important role, organizing and coordinating freight transport in the city centers. Moreover, the establishment of businesses in the center of Thriasio gives a positive impact on their establishment as their business has evolved and increased.

Exploring the drivers of urban expansion in a medium-class urban agglomeration in India using the remote sensing techniques and geographically weighted models

Rapid urbanization urges the immediate attention of policymakers to ensure sustainable city development.Under-standing the urban growth drivers is essential to address effective strategies for urbanization-related challenges.This work aims to study Raiganj’s urban development and the factors associated with this expansion.This study employed global logistic regression(LR)and geographical weighted logistic regression(GWLR)to explore the role of different factors.The results showed that the role of the central business district(covariate>-1),commercial market(covariate>-3),and police station(covariate>-4)were significant to the development of new built-up areas.In the second period,major roads(covariate>-2)and new infrastructures(covariate>-4)became more relevant,particularly in the eastern and southern areas.GWLR was more accurate in assessing the different fac-tors’impact than LR.The results obtained are essential to understanding urban expansion in India’s medium-class cities,which is critical to effective policies for sustainable urbanization.

Themes and Challenges in Making Urban Freight Distribution Sustainable

The purpose of this article is to explore and classify themes and challenges in making urban freight distribution sustainable.The study has a cross sectional design which started by a narrative literature review and analysis of a sample of related literature(like peer-reviewed articles and EU(European Union)documents).It ended with complementary discussion and recommendation for tackling the challenges.The results of the study illustrate eight and seven emerged categories of themes and challenges,respectively.It is concluded that there is great need for a packet of mixed strategies as well as a more holistic perspective where all actors together analyse and design future set-ups and operation of urban freight distribution.Such a holistic view is essential in order to:understand how different actors of the chain look upon sustainable urban freight distribution,avoid sub-optimal policies/governing rules,and suggest close-to-reality solutions for tackling the challenges.Freight distribution in urban areas is the main focus of this article.In addition,the study is demarcated to eco/environmental aspect of sustainability although it is impossible to completely exclude its interaction with economic and social aspects.The results offered in this paper provide a systematic structure for classifying issues related to sustainable urban freight distribution;something which will be beneficial for managers and policy-makers when they approach sustainable supply chain management challenges.This study provides a synthesized classification of themes and challenges which can guide researchers,industries,authorities,and policy-makers in future sustainability efforts.

新型城镇化、乡村振兴与物流业动态关系研究

探究新型城镇化、乡村振兴与物流业的互动关系,对构建经济发展新格局、促进经济高质量发展具有重要意义。因此,基于中国1998—2021年的时间序列数据,利用VAR构建三元估计模型,通过脉冲响应以及方差分解动态分析三者之间的交互关系。研究发现:新型城镇化、乡村振兴与物流业三者之间并未形成良性互动局面;新型城镇化与乡村振兴建设是促进物流业高质量发展的关键,但物流业无论是对新型城镇化还是乡村振兴的带动效果都不明显;城乡协调一体化是新型城镇化与乡村振兴的内在要求,物流业亟需变革自身发展模式,实现高质量转型,才能发挥其促进城乡融合发展、畅通经济循环的积极作用。

灵活就业人员参加城镇职工养老保险问题与对策研究——以石家庄为例

灵活就业人员在国民经济发展中发挥着重要的作用,但是我国的基本养老政策并未对灵活就业人员缴费提出刚性要求,有相当数量的灵活就业人员在被纳入城镇职工养老保险政策范围的过程中面临着诸多困难。研究从微观角度入手,将影响灵活就业人员是否参加城镇职工养老保险的因素分为个人特征、政策环境、工作环境三个维度和13个指标进行分析。得出工作满意度与选择城镇职工养老保险成正向关系;政策环境可以促进灵活就业人员选择城镇职工养老保险;个人特征的四个因素通过不同方面对灵活就业人员的行为进行影响。最终提出提升灵活就业人员的工作满意度,营造参加基本养老保险的社会氛围,完善基本养老保险相关法律法规来提高灵活就业人员的参保率。

高质量发展视域下中国城市群物流标准化效率及其影响因素研究

基于技术异质性框架,构建包含非期望产出的共同前沿-SBM-DEA模型,测算2012—2020年间中国八大城市群物流标准化两阶段效率,并分析影响效率损失的外部环境与内部企业管理等因素。研究发现:在共同前沿下,中国城市群物流标准化两阶段效率值分别为0.65和0.40,分别有35%和60%的提升空间。无效率值分解发现,总体和高、中质量城市群两阶段效率损失主要来源于管理无效率,而低质量城市群两阶段效率损失包含了技术无效率和管理无效率两方面。在效率影响因素中,FDI和企业创新氛围显著减少物流标准化两阶段的效率损失,知识产权保护只对物流标准制定阶段的效率损失减小有正向作用,政府科技支持、政府环境治理费用、金融环境、消化吸收能力只对物流标准实施阶段效率损失下降起正向作用,政府污染处罚对物流标准化两阶段效率损失均无影响。

城市外围地区农村物流设施空间分布演变及影响因素--以广州市为例

城市外围地区农村物流设施是保障城乡物资双向流通和农村产业发展的重要支撑。以广东省广州市为例,综合使用多源空间数据和空间回归模型等分析方法,探索城市外围地区农村物流设施空间分布演变特征及影响因素。在空间分布演变方面,城市外围地区农村物流设施从单核转向多核,具有圈层化、等级化特征,与广州市空间发展方向和空间格局相一致,最外围地区物流设施建设短板突出;受村级设施分布变化影响,物流设施集聚性呈现“增强—减弱—增强”的波动。影响因素方面,人口因素、交通因素和工业因素对物流设施分布有显著正向影响,农业因素对其有显著负向影响,区位因素对其无明显影响。研究结果能够丰富对农村物流设施分布演变规律的认识,为城市尺度的农村物流设施的布局优化和支撑要素的建设等提供参考。

长三角城市群物流业高质量发展水平测度研究及评价

以长三角城市群物流业为研究对象,采用熵权TOPSIS法和核密度估计分析方法,测度2010—2021年长三角城市群物流业高质量发展水平并分析区域发展差异。研究发现:长三角城市群物流业高质量发展水平向好趋势明显,但仍然有待提高。有18个城市的物流业高质量发展水平低于均值。其中上海的物流业高质量发展水平最高,居于第2位的苏州相比于上海还有较大差距。从各区域来看,区域发展不均衡的特征较明显,各区域物流业高质量发展水平存在一定差距,上海物流业高质量发展水平显著高于其他区域,物流业高质量发展水平排名靠后的城市主要集中在安徽,该区域内发展差距呈现缩小趋势。

长三角一体化城市群数字经济对物流业高质量发展的影响研究

以长三角一体化城市群为研究样本,运用2011-2020年长三角一体化城市群的数据实证检验该区域数字经济对物流业高质量发展的影响,并在此基础上进一步探讨其作用机制。研究结果表明:(1)长三角一体化城市群数字经济的发展能够推动物流业高质量发展,在进行稳健性检验后,结论依然成立;(2)从作用机制研究可以发现,长三角一体化城市群数字经济的发展能够直接推动物流业高质量发展,并且可以通过物流业全要素生产率间接推动物流业高质量发展;(3)异质性结果显示,经济越发达地区其数字经济的发展对于物流业高质量发展的推动作用越明显。根据上述研究结论提出三点政策建议:一是大力发展长三角一体化城市群数字经济与物流业,加强产业与城市间的交流合作;二是通过提高物流业全要素生产率来推动物流业高质量发展;三是根据不同城市的不同经济情况因地制宜地发展数字经济。

城市物流无人机平行航线横向间隔研究

面向未来城市物流无人机高密飞行下安全运行需求,选取空域利用率高的平行航线,聚焦平行航线运行中碰撞风险,研究同时考虑冲突频率和碰撞概率的间隔模型,提出符合安全要求的平行航线横向间隔。借鉴有人机管制经验,确定安全目标水平,并以平行航线上相邻无人机纵向距离小于纵向间隔视为冲突评判标准,再根据实际运行数据,计算区域无人机冲突实际发生频率。综合考虑无人机参数、飞行流量、空域性能、偏离概率及角度、冲突探测与解脱机制等因素,构建多参数、多约束的平行航线城市物流无人机运行场景模拟平台。引入蒙特卡洛方法,给定冲突发生频率和意外偏离概率,假设无人机以一定概率因随机意外偏离而引发无人机之间飞行冲突,模拟冲突下无人机的运行结果,记录违反测试标准的事件。设定1~51 m多个横向间隔待选值,实施510万次仿真实验并统计实验结果,结果发现:①发生违反测试标准事件共计50302起;②事故发生的概率密度与横向间隔服从负指数分布;③可采用施加合适的横向间隔策略,实现安全目标水平。基于拟合的概率密度函数,通过计算剩余风险,对比安全目标水平,确定城市物流无人机平行航线横向间隔为33米。

基于“信号灯”策略的无人机航线交叉口控制方法:以杭州华正起降场空域为例

近年来,城市场景下的无人机短距物流运输发展迅速,随之而来的城市空域规划问题引起广泛关注。选择无人机航线汇集的航线交叉口作为研究对象,首先分析了航线交叉口的设计影响因素与当前研究现状,接着选取其中的受控平面交叉口进行研究,引入地面“信号灯”策略加以优化。针对平面交叉口和无人机的运行特点,提出了无人机航线通用交叉口模型、信号灯优化控制策略。在杭州华正无人机起降场的真实环境中,仿真验证了本文提出的控制策略可以在保证通行能力的情况下,降低平均延误。研究结果对未来无人机航线交叉口设计和控制具有重要的指导意义。

冲突探测与解脱机制下城市物流无人机自由飞行间隔研究

聚焦自由飞行场景,为确保城市物流无人机运行安全,需要为无人机配备安全间隔。借鉴气体模型和位置误差概率模型,提出考虑冲突探测与解脱机制的无人机自由飞行间隔综合评估模型。首先应用气体模型评估无人机冲突发生频率;接着综合考虑空中交通特性、冲突探测与解脱机制、航线结构、空中交通服务能力,计算冲突发生时碰撞概率,得到总体碰撞概率。最后,对标安全目标水平,计算城市物流无人机自由飞行所需间隔。应用该模型,针对某运行空间无人机自由飞行场景,制定所需间隔。研究结果为城市物流无人机间隔标准制定提供可行方法,同时可用于指导冲突探测与解脱机制,降低突破间隔后碰撞概率。

城市应急物流系统韧性的概念、内涵及构建

城市应急物流系统建设对提升城市应急管理治理能力具有重要意义。运用韧性城市治理理念对城市应急物流的概念及内涵进行系统分析,可以发现:城市应急物流系统韧性是静态城市应急物流能力和动态持续变革改进过程的组合,其内涵涉及城市应急物流系统的工程韧性、生态韧性和演进韧性,更多表现为子系统之间相互耦合嵌套的结构化整体韧性。城市应急物流系统韧性的构建目标是在突发事件冲击背景下降低应急物流系统损坏程度并提升其恢复速度。风险因素、城市系统状态和城市应急管理能力对城市应急物流系统韧性存在直接影响,构建城市应急物流系统韧性需重视城市应急管理建设机制创新、保障城市应急物流系统物质基础、促进城市应急物流系统多主体协同共建。

公交辅助无人机的城市物流配送模式研究

电子商务迅猛发展倒逼物流行业不断转型升级,针对各地政府鼓励公共交通发展,倡导绿色低碳的物流配送方式,研究了一种公交辅助无人机的配送模式。对问题做出说明后,构建了以配送成本最小的数学模型,并设计了智能通用变邻域搜索算法对问题求解,同时为提高算法求解效率,引入K-means分簇与贪婪算法生成初始解。针对不同规模算例,进行多种局部搜索策略、多种算法对比实验,验证了算法有效性;选取标准CVRP算例,将单卡车配送、卡车无人机协同配送与公交辅助无人机配送模式进行对比,证明其成本、时间优势;选取北京快速公交2号线及周边客户点,通过改变公交站点间距、发车间隔做出敏感度分析,实验结果证明增大站点间距的影响大于发车间隔的改变。

中国城市物流发展潜力评价及空间自相关演化

对于中国城市物流发展潜力的充分认识有助于优化我国物流发展布局,提高物流效率。但是在现有的研究中缺乏对于中国城市物流发展潜力的认识。基于此,通过对2009-2021年中国284个地级及以上城市的物流发展潜力进行评价,并运用空间自相关的研究方法,对2009-2021年中国城市物流发展潜力的变化情况以及空间自相关的演化情况进行了分析,得到以下研究结论:目前我国城市物流发展潜力现状表现为东高西低,京津冀、成渝、长三角、珠三角表现优异,总体呈现十字型布局,以武汉、郑州为代表的中部城市正在崛起;在此期间,中国城市物流发展潜力总体处于缓慢增长的态势,但是城市之间的差距依然非常大;中国城市物流发展潜力总体呈现集聚情况,这种集聚总体呈现出先增高再减小的趋势;中国城市物流发展潜力集聚情况总体变动较小,并且大多数城市处于LL(低低)集聚之中,HH(高高)集聚型城市数量有所增加。

海南省城乡冷链物流一体化发展现状与对策研究

大力推动城乡冷链物流一体化,是巩固和增强农村经济发展的重要手段之一,有利于打破城乡二元格局。本文以海南城乡冷链物流为研究对象,分析城乡冷链物流一体化必要性,通过实地调研海南省城乡冷链物流发展现状,发现存在冷链供应链尚未建立、城乡冷链资源分布不均、专业冷链物流人才匮乏、农村冷链信息化水平低、“最先一公里”冷链认知不足等问题,并针对存在的问题提出了相应对策,以期促进海南省城乡冷链物流一体化健康发展。

城市公交快递配送中的公交线路匹配问题研究

针对中小城市公交系统面临的客流下降和运力闲置问题,以及末端快递配送在“最后一公里”面临的运力挑战,提出了一种创新的快递-公交线路匹配模型。该模型以提高线路快递配送量与需求量的匹配率为优化目标,同时确保不影响公交正常运营和乘客体验。研究通过满载率筛选、距离计算、服务半径设定等方法,综合考虑了公交车辆的配送能力和需求点的服务需求,构建了目标规划模型。以湖南益阳桃江县公交配送网络为例,实证分析验证了模型的有效性,为城市公交快递配送提供了科学决策支持和实用价值的路线规划工具。该研究不仅提升了公交物流配送能力利用率,增加了公交企业收入,降低了快递企业的运输成本,还为缓解城市交通压力和推动公交行业转型升级提供了新思路和解决方案。