Quantitative Analysis of Contribution of Industrial Structure to Economic Growth in Jiangsu Province

The industrial structure in Jiangsu Province realizes the transformation from "secondary industry-primary industry-tertiary industry" to "tertiary industry-secondary industry-primary industry". However, the effectiveness of this model of industry-dominate industrial structure and the role of industrial structure pattern in promoting regional economic growth are yet to be researched. By using shift-share analysis method, we judge the importance of factors of industrial structure in regional economic growth of Jiangsu Province, and point out that factors of industrial structure are not the dominant forces in economic growth of Jiangsu Province; among the contributions of three industries to economic growth of Jiangsu Province, the contribution of the primary industry is greatest, followed by the contribution of secondary industry and the contribution of tertiary industry successively; real estate industry makes the greatest contribution to economic growth of Jiangsu Province; financial industry and construction industry make relatively small contributions; the potential of industry needs to be further developed. In the process of economic development of Jiangsu Province, the industrial structure is yet to be further optimized so as to give play to the role of industry in promoting the development of Jiangsu Province.

Separate Analysis of Remote Sensing Information of Structures of Different Geological Periods and Quantitative Study of Corresponding Tectonic Stress Fields

The structural feature shown on a remote sensing image is a synthetic result ofcombination of the deformations produced during the entire geological history of an area.Therefore, the respective tectonic stress field of each of the different stages in the complexdeformation of an area can be reconstructed in three steps: (1) geological structures formed atdifferent times are distinguished in remote sensing image interpretation; (2) structuraldeformation fields at different stages are determined by analyzing relationships betweenmicrostructures (joints and fractures) and the related structures (folds and faults); and (3)tectonic stress fields at different stages are respectively recovered through a study of the featuresof structural deformation fields in different periods. Circular structures and related circlular and radial joints are correlated in space to con-cealed structural rises. The authors propose a new method for establishing a natural model ofthe concealed structural rises and calculating the tectonic stress field by using quantitative dataof the remote sensing information of circular structures and related linear structures.

A Study of the Industrial Circular Economy Using an Essence Analysis Model

The concept of a circular economy can be applied to different business fields.The development of the existing industrial cycles with an overemphasis on economic development and the twisting concept of a circular economy,has limited any substantial contribution of the circular economy to environmental resources.In some cases,resources are even being consumed to create resource recycling.This puts a greater burden on the environment.To gain an understanding of the actual value of a circular economy to the environment and resources,an“Essence Analysis Model”has been used in this study.This combines sustainable development issues in a multi-faceted and multi-leveled analysis of the industrial circular economy model to guide its development more directly towards fundamentals.An analysis of the results of the“Essence Analysis Model”was used to find and change the original strategy,and develop a means of improving the circular economy model.The results of the study make an essential contribution to the sustainable development of environmental resources and the reduction of greenhouse gas emission.

Emergy-analysis based approaches to develop circular economy in the Three Gorges Reservoir area

The eco-environment and the condition of economic development in the Three Gorges area were evaluated with emergy indices calculated with the statistic data of the years from 1997 to 2005. The rising environmental loading ratio indicates an increasing pressure of economic activities on the environment and the economic development achieved at the cost of over-exploitation of resources and environment deterioration. The net emergy yield ratio implies that the economic system of this area was a self-contained, resource-export-oriented type at a relatively low level of technology. The emergy sustainability index of about 6 implies the economy of this area was under developed but had a potential to grow. According to the results of the emergy analysis, circular economy should be taken as the economic model of this region's development. This economic system should be water-resource-oriented and more open, make combined use of local and extraneous resources, and have an updated systematic structure with emphasis on emergy recirculation.

Latent dimensions between water use and socio-economic development: A global exploratory statistical analysis

Water use and socio-economic development are interconnected in complex ways.Causalities are not easy to identify but it is evident that a nexus between water use and socio-economic development does exist.Considering the diversity of national situations relating to these interrelated phenomena,its study should be considered from a global perspective.This article critically reviews the literature and information from official sources on the relevance of water use and circular economy in order to create a global picture,linking water with socio-economic development.Data from 195 countries were analyzed statistically.A factor analysis defined five essential latent dimensions on the nexus between water use and socio-economic development:development and basic services,population and resources,economic volume,health and well-being,and population density.Based on the identified factors,countries were classified into six groups:Global South in difficulty,global semi-periphery,advanced economy,Middle East and other Global South developing economy,global weight,and small highly developed economy.The clustering results clarify connections between water use conditions and socioeconomic development.Understanding the variety of national profiles is helpful to reveal the magnitude and urgency of dealing with the nexus between water use and socio-economic development for many countries.

Innovation and Development Strategies of Investment and Financing Modes for Circular Economy

Circular economy adapts to large-scale production, has higher requirement on technical level, and possesses positive externality. There- fore, circular economy requires a lot of financial support. Facing investment and financing problems of circular economy by enterprise, the govern- ment should strengthen the regulatory role, increase investment support on circular economy, strengthen the bank＇s green credit business, reduce barriers to business loans, diversify financing channels for enterprises, guide social investment＇s flow direction, and promote circular economy form- ing larger scale, thereby providing policy support for building a resource-saving and environment-friendly society.

Construction of Circular Economy Industrial System

It is difficult to realize the transformation from tradi- tional economy industrial system to circular economy industrial system. Regarding primary raw materials as the indicators, the industrial system has been specified according to the divergence among the indicators and the circular utilization modes. In com- parison with the association among industrial systems, the rela- tionship among industrial sub-systems is named as industrial cross-linking in this paper. The industrial system which could completely utilize and recycle the indicators should be increased and strengthened, and the circular economy industrial system with complete industrial association and industrial cross-linking should also be constructed. Taking the development of circular agricul- tural system basing on the traditional agricultural system as an example, the traditional agricultural products are regarded as the indicators which have been divided into foodstuff and crop straws which are used to produce food and articles for use, like fertilizer, energy and papers etc. The way to construct the circular agricul- tural industrial system is to increase the industrial systems that could utilize the products generated from crop straws, feces and other castoffs and transform the wastewater and other trucks into environmental friendly products. It has also been pointed out that the construction of circular economy industrial system is condu- cive to the foundation of circular industrial economics and the establishment of the construction layout of circular economy and the application schemes. Suggestions to the theoretical and prac- tical work of the next step have also been brought forward in this paper.

基于回归分析法的矩形槽圆管吸能特性研究

为了研究矩形槽圆管吸能特性规律,提出了一种基于回归分析法的结构参数与吸能特性关系的拟合方法。针对轴向冲击下的圆管动态响应,首先,建立了6005A-T6材料的Cowper-Symonds本构模型,并验证了仿真模型的准确性;其次,设计了正交试验,建立了吸能特性与结构参数之间的计算模型;然后,利用多元线性与非线性回归分析方法对计算模型参数求解,并对比了两种拟合结果,得到了峰值力和吸能量的经验公式;接着,对比经验公式与有限元数值计算值表明,经验公式在研究范围内具有较高准确性,误差在8%以内;最后,引入吸能性能指标并使用遗传算法对圆管进行了结构优化,优化结果表明,在研究范围内当直径和槽端距最小、壁厚和槽宽最大、槽深最浅时,矩形槽圆管的吸能性能最优。

中国民营经济高质量发展空间关联网络结构特征及影响因素分析

了解民营经济高质量发展的空间关联网络结构状态及其影响因素,对促进民营经济实现高质量发展具有重要作用。以2014年至2021年我国31个省(自治区、直辖市)民营经济的省际面板数据为样本,基于修正后的引力模型测算民营经济高质量发展空间关联关系,在此基础上运用社会网络分析法(SNA)和二次指派程序(QAP)探究其空间关联网络结构整体、个体、块模特征及其影响因素。结果表明:我国民营经济高质量发展的空间关联网络结构特征相对稳定,并具有一定等级性;省际民营经济高质量发展的空间关联网络可以分为四个板块;城市距离对民营经济高质量发展的空间关联强度产生显著负向作用,科技投入水平差异、贸易经济水平差异和经济发展水平差异对其产生显著正向影响。研究结果可为推动民营经济高质量发展及引导省际民营经济形成高质量发展的关联网络结构提供参考。

我国数字经济发展水平及区域网络结构

基于2013—2021全国30个省(区、市)的面板数据,利用CRITIC-熵权法测度省域数字经济发展水平,借助QAP分析法揭示各维度差异对数字经济发展水平差异的影响程度,并运用改进的修正引力模型,构建有向加权的省域数字经济关联网络,从整体、局部、个体3个维度量化其网络结构。研究发现,各省数字经济发展水平稳步提升,但不同省域间数字经济发展水平存在较大差异,北京、广东、上海数字经济发展水平遥遥领先;各省域数实融合平均水平变化最小,数字产业平均水平变化次之,数字基础设施和数字创新平均水平变化较大,数字基础设施差异和数字创新差异是数字经济发展水平差异的主要来源。从网络结构来看,各省份之间数字经济联系不够紧密,邻近省份更易形成凝聚子群,北京、上海、江苏、广东等省(市)占据网络中心位置,在数字经济关联网络中具有较强的影响力和吸引力。

数字经济赋能黄河流域高质量发展内在机理及其实证检验

为探讨数字经济赋能黄河流域高质量发展的机理,并为黄河流域生态保护和高质量发展重大国家战略的全面实施提供参考,在数字经济与高质量发展关系理论分析基础上,分别构建高质量发展水平和数字经济发展水平指标体系,基于黄河沿线60个城市2011—2020年的面板数据,采用熵值法测度黄河流域数字经济发展水平和高质量发展水平,进而以高质量发展水平为被解释变量、以数字经济发展水平为核心解释变量、以产业结构升级和绿色技术创新为机制变量、以环境水平和就业水平等为控制变量,构建基准计量模型和机制检验模型,通过模型回归实证分析数字经济推动黄河流域高质量发展的作用机制,并对实证分析结果进行内生性和稳健性检验。结果表明:数字经济赋能黄河流域高质量发展具有显著性,其内在机理是促进产业结构升级和绿色技术创新;数字经济赋能黄河流域高质量发展存在空间异质性,其作用在黄河中游地区最明显、在上游地区和下游地区相对较小。提出了全面推动黄河流域数字经济发展并使其进一步赋能高质量发展、推动产业结构升级、提升绿色技术创新水平、实施区域差异化发展战略、推动区域一体化发展等政策建议。

中国数字经济空间网络结构演化及其驱动因素

本文运用修正的CRITIC评价法测度了2013—2020年中国省域数字经济发展水平,运用社会网络分析方法探究了数字经济空间网络结构演化特征及其成因。结果表明:①中国数字经济发展水平总体呈现稳步上升态势,空间格局上表现为东高西低的特征。②研究期内,中国省域数字经济的空间关联网络呈现出多线程与稠密化的复杂结网态势,网络密度有所提升,整体不存在等级森严的空间结构。③经济发达地区在空间网络结构中的优势地位显著,西部及边陲地区与其他地区的互联互通能力有待提升;凝聚子群空间分布逐渐形成有序的团块化分布。④数字经济空间网络结构是多因素综合作用的结果,科技创新水平、政府支持力度及地理空间距离始终表现出显著作用,而经济发展水平、产业结构水平和城镇化水平的效应则体现出先强后弱的阶段性特征,上述因素共同驱动着中国省域数字经济空间网络结构的优化与重组。

乡村振兴背景下发展循环农业经济的路径研究——以秸秆综合利用为例

为实现乡村振兴,推进农业现代化成为当前农业工作的重中之重,循环农业成为了实现农业高速发展的有效途径。我国是农业大国,可利用的农业资源极为丰富。推动农业循环经济发展,建立健全绿色低碳发展的循环农业体系,不仅可以提高资源的利用效率,改善能源结构,同时可以加快农业农村经济向绿色低碳发展模式转变。文章以秸秆综合利用为例,提出循环农业经济发展的重要性,在此基础上,探索循环农业经济发展的路径,并提出相关政策建议,为我国实现乡村振兴和双碳目标作出积极贡献。

以畜禽粪便为原料的生物天然气能源潜力和碳强度分析

以畜禽粪便为原料的生物天然气有显著的资源和环境效益。针对其能源潜力和碳强度在省级地区尺度上的差异问题,提出生命周期碳排放核算模型,分析以畜禽粪便为原料的生物天然气的时空分布特征。结果表明,随着畜牧业规模的扩大和集约化,以畜禽粪便为原料的生物天然气潜力越来越大,各省之间的能源潜力存在较大的差异。以畜禽粪便为原料的生物天然气的年碳减排潜力达到12.5亿t。能源潜力、空间特征和碳强度的量化方法为区域畜禽粪便资源化利用管理提供支持。

低碳循环经济下鞋服企业的绿色发展研究

鞋服产业对我国的经济发展及劳动力就业做出重要的贡献。随着新一轮产业变革的开始,鞋服企业需要直面自身的污染问题,加快绿色发展步伐才能够为我国的低碳经济发展添砖加瓦。本文对鞋服企业的常见污染进行了分析,讨论了影响鞋服企业绿色发展的内外部因素,并提出针对性的绿色发展策略,希望能够推动鞋服企业的绿色转型升级,实现更为长效的发展。

新发展格局的科学内涵、现实意义及实践路径

党的二十大报告指出,高质量发展是全面建设社会主义现代化国家的首要任务。构建新发展格局是高质量发展的必然选择,这是基于我国经济社会所处的发展阶段做出的重大战略决策。当前,无论是从中国经济社会的发展速度、中国对世界经济的贡献度,以及中国现阶段的国际地位和经济体量来看,以国内市场为主体的大循环都是新发展格局的必然选择。新发展格局的构建,不仅有利于促进经济结构转型升级,解决发展不平衡不充分问题,更能让中国经济掌握创新发展主动权,推进对外开放跃上新台阶,实现“内循环驱动、外循环助推”的良性发展格局。新发展格局的实现,首先,要以科技创新为动力,持续加强研发投入力度,提升科研自主创新能力,为新发展格局的构建提供动能;其次,以供给侧结构性改革为主线,创造新供给,释放新需求,为新发展格局的构建奠基固本;再次,以深化经济体制改革为抓手,通过深化经济体制改革为构建新发展格局破除体制机制障碍;最后,要以推进区域协调发展为重点,构建国内统一大市场,为新发展格局的构建开辟新局。

全域旅游视角下旅游经济空间网络结构研究——以山西省为例

以山西省为研究对象,基于2001—2020年11个地市人均旅游收入统计数据,运用Granger因果检验和社会网络分析法从网络密度、网络中心性和块模型等方面探究其旅游经济空间网络结构特征.研究结果表明:旅游经济空间网络结构较紧密,呈现以太原、忻州为核心,运城、朔州、长治、大同为次核心,临汾、阳泉、晋城、晋中、吕梁为边缘的“2-4-5”环状空间结构;旅游经济空间网络结构对称性较好,扩散水平与吸引水平不相上下,太原和忻州在网络中的支配能力最强,太原发挥着较强的桥梁作用;山西省旅游经济空间网络可划分为四大板块.基于此,山西省可完善跨区域全域旅游协作机制,强化核心及次核心地市的区域辐射带动力.同时,关注旅游经济板块特征,强化全域旅游空间的优化作用,积极推进国家全域旅游示范区的创建.

数字经济对经济发展的影响及其异质性研究——基于全国270个地级城市的实证分析

本文围绕数字经济对城市经济发展的影响及其异质性分析展开深入研究,基于2011—2020年我国 270 个地级以上城市的数字经济发展水平,构建了检验数字经济发展对经济发展影响的实证模型,并从地理区位、产业结构和经济发展水平三方面展开异质性分析。结果表明:数字经济显著促进了经济发展,在稳健性检验后仍成立。异质性分析方面,数字经济对中部地区的促进作用比东西部地区更显著;按产业结构和经济发展水平分类结果均在低产业结构水平和低经济发展水平下,数字经济对经济发展有更强的促进作用,并随着第三产业占比和经济发展水平的提高而减弱。

超深圆形基坑地下连续墙支护结构体系力学性能分析

为了定量研究超深圆形基坑地下连续墙支护结构体系的受力和变形机理,通过Midas GTS建立超深圆形基坑施作过程的精细化有限元模型,通过改变地下连续墙局部弱化程度、地下连续墙先行幅和后续幅数量和嵌固深度等参数,对围护结构受力、变形和基坑周边地表沉降等规律进行了分析,分析结果显示:本工程的围护结构设计具有一定的优化空间;围护结构的水平最大变形和最大应力集中于第8~10道环梁处;围护结构的变形随幅间弱化程度和幅数的增加而增加,围护结构应力随幅间弱化程度和幅数增加而减小;基坑周边地表沉降随幅间弱化程度和幅数的增加而增加。分析结果对类似超深圆形基坑的设计和施工具有一定的借鉴意义。