Eco-environmental Impact Assessment of the Change of Regional Industrial Structure and Regulative Measures

Acting as an important driving force for the change of the regional land use,the change of industrial structure also has some influences on the ecological environment.The assessment and mechanism analysis of these influences will be beneficial to the sustainable development of regional economy and the im- provement of relationships between man and earth.Taking Chuzhou City in Anhui Province as an example,on the basis of a qualitative analysis of the influence of the development of differ- ent industry on the regional ecological environment,this paper builds the influence factor of industrial structure on natural envi- ronment and the influence index of industrial structure on natural environment,makes a quantitative assessment of the change of the industrial structure and its comprehensive influences on the eco- logical environment in the Chuzhou City from 1974 to 1995. Studies show that,during the analysed period,Chuzhou City's industrial structure has changed markedly,having undergone two transformations.The influence of industrial structure on natural environment from 1974 to 1995 increased as a whole,while from 1996 to 2004,the influence of industrial structure on natural en- vironment decreased year-on-year.These changes indicate that the regional change of industrial structure results in better ecological effects.Finally,we propose appropriate regulatory measures ac- cording to our research results.

Quantitative analysis on the contribution of industrial structure change to sustainable development: a case study of Fujian Province

Development and sustainability are the core connotation of sustainable development. Sustainability of economic development and the provision capability of resources and environment are two aspects of sustainable development. The former ones are the foundation of the latter ones. Industrial structure has a close relationship with sustainable development. The optimization of industrial structure is the important base for the sustainable development of modern economy and also the important ways of the sustainable utilization of resources and environment. The intensive growth effect of industrial structure change has the meaning of sustainable development. This paper reviews and explains the theory on the contribution of industrial structure change to sustainable development, builds the calculation model through introducing the coeff icient of industrial structure change, makes an empirical study on the contribution of industrial structure change to sustainable development in Fujian, and puts forward ways and policies of optimizing industrial structure both among industries and inside the industry in the process of industrial structure change.

Study on Changes of Industrial Structure and Its Ecological Environment Benefit in Shaanxi Province

[Objective] To reduce influences of adjustment of regional industrial structure on ecological environment,promote coordinated development of regional economy and ecological environment,and improve the relationship between human beings and natural environment. [Method]Based on the statistical data of Shaanxi Province during 1978- 2013,the ecological environmental impact index and effect index of industrial structure in Shaanxi Province were calculated,and then the ecological environment benefit of changes in industrial structure in Shaanxi Province from1978 to 2013 was assessed quantitatively. [Result]The impact of changes in industrial structure on ecological environment in Shaanxi Province was moderate,but later changes in industrial structure had greater influences on ecological environment than before. [Conclusion]Industrial structure in Shaanxi Province should be optimized further to ensure the healthy development of ecological environment.

Research on the Variability and Impact of Industrial Organizational Structure under the Background of Internet Plus Era

This paper determines the basic principles and compares the effects of industrial structure changes through hierarchical analysis of industrial organizational structure on five empirical objects according to a combination of theoretical and empirical analysis and also a combination of macroeconomics and econometrics.This will provide three necessary conditions and four basic conditions for the change of industrial structure to improve the entity economy based on industrial upgradation.

STUDY ON CRYOGENIC PHASE CHANGE & WEAR CHARACTERISTIC OF HIGH SPEED STEEL

The microscopic structure change rule in high speed steel (HSS) after an additional cryogenic treatment was studied in this paper. Highly dispersed nano-carbide (η-Fe2 C) separated from tempering martensite was found distributed on twin planes of marten-site and dislocation places. Retained austenite was found sheared into martensite and nano-carbide separated at the same time. In addition, the tempering martensite was fine-grained. The stated changes of HSS evidently improve the lifespan of HSS cutter and fully show the advantages of nano-structure. The cryogenic treatment of HSS also improves the roughness of HSS cutter (decrease Ra number by about 50%) and greatly increases the wear resistance of HSS cutter. Further experiments on the wear characteristic of HSS cutter supported the findings mentioned above. The stated HSS treatment technology would implement nano-structure of traditional tool steel through phase change. It could be a new method to improve the performance of HSS cutter.

Industrial Structural Changes in Hong Kong,China under One Country,Two Systems Framework

Hong Kong has undergone substantial economic transformations and developed into a sophisticated busi- ness and financial center in the Asia-Pacific region, since the return of sovereignty to China as a Special Administrative Region under the One Country Two Systems （OCTS） in 1997. This paper discusses and analyzes the industrial struc- tural changes of Hong Kong in recent decades as well as its future challenges and opportunities, The data and finding reveal that even though Hong Kong will face fierce competition from the Mainland＇s cities as the rise of China, the important role as a bridge between China and the rest of the world wilt brace Hong Kong itself under the OCTS for developing into a service hub for business and trade in the Asia-Pacific region.

The Effect of Industrial Structure Change on Carbon Dioxide Emissions: A Cross-Country Panel Analysis

Reduction of carbon dioxide(CO2)emissions is one of the biggest challenges for global sustainable development,in which economic growth characterized by industrialization plays a formidable role.We innovatively adopted the input and output(I-O)table of 41 countries released by World I-O Database to determine the industrial structure change and analyze its impact on CO2 emission evolution by developing a cross-country panel model.The empirical results show that industrial structure change has a significantly negative effect on CO2 emissions;to be specific,0.1 unit increase in the linkage of manufacturing sector and service sector will lead to a decrease of 0.94 metric tons per capita CO2 emissions,indicating that upgrading industrial structure contributes to carbon mitigation and sustainable development.Further,urbanization,technology and trade openness have significantly negative impact on CO2 emissions,while economy growth and energy use take positive impacts.In particular,a 1%increase in per capita income will contribute to an increase of 8.6 metric tons per capita CO2 emissions.However,the effect of industrial structure on environment degradation is moderated by technology level.These findings fill the gaps of previous literature and provide valuable references for effective policies to mitigate CO2 emissions and achieve sustainable development.

CO2 emissions and their bearing on China＇s economic development： the long view

Greenhouse-gas (GHG) emissions in China have aroused much interest, and not least in recent evidence of their reduction. Our intent is to place that reduction in a larger context, that of the process of industrialization. A lengthy time perspective is combined with a cross-sectional approach-China plus five other countries-and addressed through two general models. The findings are salutary. First, they suggest that a diversified economic structure is consistent with diminished intensity in energy use. Secondly, and the obverse of the first, they imply that a diversified energy structure promotes reductions in CO2 emissions. Finally, one is led inevitably to the conclusion that, together, the findings point to a path for countries to transform their economies while at the same time undertaking to drastically moderate their energy use, switching from a pattern of heavy carbon emissions to one in which lighter carbon emissions prevail. The implications of such findings for environmental management are enormous.

The Impacts of the Growth of the Three Industries and Industrial Price Structural Changes on China’s Economic Growth between 1952 and 2019

This paper focuses on the impacts and effects of China’s growth of the three industries and price structural change on the real GDP growth rate.First of all,it presents a new accounting method for decomposing growth rates on the basis of existing accounting method for decomposing growth rates.By using this method,we can identify the impacts and effects of structural changes on the growth rate.The paper uses a new decomposition method to recalculate China’s industry-based real GDP growth rates between 1952 and 2019,focuses on the driving effect of growth of the three industries on the real GDP growth,and the impacts of price structural change on GDP growth rate and the contributin of the growth of the three industries on GDP growth rate.By analysis,this paper shows that between 1952 and 2019 China’s economic growth was mainly driven by the secondary industry,which had contributed to the economic growth by over 50%,the role of the tertiary industry in driving economic growth rose,but that of the secondary industry declined over the time;in the short run,the overall effect of the price structural changes of the three industries has a little impact on the economic growth,but the price change of each industry has strong effects,and the price structural change has signifi cantly changed the effect of the growth of the three industries on the real economic growth;in the long term,the price structural change plays a relatively big hindering effect on economic growth due to the Baumol’s cost disease.

Empirical Analysis of Economic Growth in Sichuan Province

For a long time, the factors influencing a regional economic growth are mainly workforce, capital and scientific and technological progress. But with the further promotion of China＇s reform and opening-up and intensification of the further improvement degree, the main factors influencing a regional economic growth constantly change. This paper utilizes the relevant data of Sichuan to set up the econometric model and quantitatively studies the factors influencing economic growth of Sichuan. Through comparing the greatness that each factor influences the economic growth of Sichuan, the paper takes system changes as leading factor to influence the economic growth during 1984-2003 of Sichuan. At the same time, the upgrading of industrial structure will be a core of economic growth in the future, and the scientific and technological progress is the potential force of economic growth.

财政分权与经济结构转型——一个产业结构变迁的视角

本文构建了一个包含中央政府和地方政府行为的产业结构变迁模型,理论研究发现,财政分权通过影响财政支出在中央政府和地方政府之间的配置来影响全要素生产率,并进一步影响产业结构变迁,促进产业升级。财政分权对产业结构变迁的影响与财政分权水平,以及非农业部门中央政府财政支出和地方政府财政支出的产出弹性有关,经济中可能存在最优的财政分权可以极小化农业部门的劳动力份额。本文通过省级面板数据模型考察财政分权对我国产业结构变迁的影响。在此基础上,我们运用省内县级政府的税收分权指标,以及双重差分方法做了稳健性检验。实证研究发现,财政分权程度越高,农业部门劳动力份额越低,这说明财政分权有利于我国产业结构升级,且这一结论是稳健的。

畜牧产业结构变动对生猪价格的影响

数字经济时代下,畜牧产业作为发展现代农业、促进农业经济增长的关键驱动力,对稳定我国生猪价格具有重要作用。文章基于2011年2月—2023年1月共计144个月的生猪价格数据,利用VAR模型,实证检验畜牧产业结构变动对生猪价格的影响。结果显示:畜牧产业结构变动是引起生猪价格变化的格兰杰原因;生猪价格受畜牧产业结构变动的滞后影响;生猪价格在前两期受畜牧产业结构变动的负向冲击,从第3期开始受畜牧产业结构变动的正向影响,响应程度在第12期达到峰值,在第24期影响逐渐消失;畜牧产业结构变动对生猪价格的冲击响应周期约为2年,直至第2年仍存在10.85%的贡献率。研究表明,畜牧产业结构变动对生猪价格具有正向影响作用。

徐州市人口年龄结构变化对产业结构优化影响的研究

产业结构的演变和人口年龄结构的变迁过程并非相互独立。文章结合徐州当地的实际情况,从供给和消费的角度探讨徐州市人口年龄结构的变化对产业结构优化升级所产生的影响。通过系统的研究,致力于促进徐州当地产业在优化和发展过程中,采取积极有效的措施,减少人口年龄结构对其的负面影响,强化人口年龄结构对其的正面影响。

产业结构变迁下传统村落文化空间生产演化研究——以陕西袁家村为例

传统村落文化空间是乡村文化振兴的关键载体。以陕西袁家村为例,结合空间生产理论探析乡村在传统农业村落、现代工业村落、乡村旅游村落3个产业变迁过程中文化空间生产的演化逻辑。结果表明:袁家村物质文化空间经历了从传统农耕文化到乡镇工业文化,再到乡村旅游文化的转变;精神文化空间由乡土观念和小农意识逐渐发展为集体信仰和组织观念,再到强化道德教育和乡风文明建设;制度文化空间从血缘宗族制度下的礼俗秩序转变为集体主义规范兴起下的制度规范与业缘交往,最终实现了多元主体融合下的三治合一。文化空间的功能价值从最初的农业生产和生活功能拓展为生产、生活与旅游功能并重。这些演化过程是内外部经济资本积累、构建者主导的政治权力以及集体主义导向的社会关系相互交织、相互影响的结果,共同决定了袁家村文化空间的形态和结构。

新型高转速柱塞泵转速变化压力特性研究

为了研发高转速、高流量的燃油泵,以新型双斜盘柱塞泵为原型,搭建其流域简化数值仿真模型,研究不同转速下柱塞腔压力脉动机制及演变规律。对比不同转速下柱塞泵压力脉动,探究转速变化对压力大小影响;结合柱塞泵旋转过程中柱塞腔和配流盘的位置和压力变化,研究运行过程中柱塞腔内部压力波动成因。结果表明:随着转速的增加,柱塞腔内部各点压力值提高,但整体压力波动趋势一致;柱塞腔内部压力波动受到与配流盘接触情况和柱塞泵活塞一侧往复运动的影响。

Numerical simulation of fluid-thermal-structural coupling characteristics of stratospheric non-rigid airship

The voluminous stratospheric non-rigid airship is very sensitive to the external thermal environment.The temperature change of internal gas caused by the variation in the external ther-mal environment and wind speed will lead to a change in the shape and buoyancy of the airship,thereby affecting its flight control.The traditional static analysis method is difficult to accurately reflect this fuid-thermal-structural coupling process.In this paper,the iterative analysis method was established for the fluid-thermal-structural coupling effect of stratospheric non-rigid airship based on the models of fluid,thermal,and structural deformation.Considering the load such as the internal thermal effect and external flow field of the airship,the simulation of the thermo-induced structural deformation effect was conducted using Fluent and Abaqus software.The influ-ence of local time and external wind speed on the structural deformation,volume,and equilibrium altitude of the airship was analyzed.The results demonstrate that,at low wind speed,the influence of aerodynamic pressure on the deformation of the airship is negligible.However,a great amount of heat is carried away by the wind,then the structural deformation caused by internal and external pressure difference is alleviated and the equilibrium altitude of the airship change obviously.This can serve as a guideline for the design and flight test of the long-endurance stratospheric non-rigid airship.

基于乙二醇链段构象变化的涤纶工业丝聚集态结构研究

在150℃烘箱中对3种不同纺丝工艺即常规工艺(A)、提高喷丝头拉伸倍数(B)、提高喷丝头拉伸倍数并降低第二级拉伸倍数(C)制备的涤纶工业丝试样F-A、F-B、F-C进行30~120 d热处理,研究纺丝工艺及热处理时间对涤纶工业丝乙二醇链段构象的影响,以此考察涤纶工业丝的聚集态结构变化。结果表明:提高喷丝头拉伸倍数促使纤维中乙二醇链段的旁式构象向反式构象转变,降低第二级拉伸倍数不足以破坏纤维的原有结构;喷丝头拉伸倍数从109.62提高到120.00,试样的乙二醇链段反式构象相对含量(X_(t))从23.37%增加至29.00%,结晶度(X_(c))从43.04%降至42.57%;第二级拉伸倍数从3.389降至3.200,试样的X_(t)从29.00%增加至41.73%,X_(c)从42.57%提高至45.44%;对于F-A与F-C试样,随着热处理时间的延长,试样的X_(t)及X_(c)均先增加后下降,均在热处理90 d时出现最大值;而对于F-B试样,随着热处理时间的延长,试样的X_(t)及X_(c)均逐渐增大,在热处理120 d时分别达到64.90%与63.36%。

农村人力资本积累对农业产业结构升级的影响

本文旨在探讨农村人力资本定义、重要性和现状。系统阐述农业产业结构升级的必要性及其驱动力。详细分析农村人力资本在技术创新、管理优化、市场需求变动和农业产业链完善中的作用。同时,分析农业产业结构升级对农村人力资本的新要求,并探讨两者之间的协同发展关系。强调农村人力资本是农业产业结构升级的核心力量,两者间存在紧密互动。

乡村产业振兴的关键环节——以安徽省亳州市利辛县X村为例

要素禀赋结构是乡村产业发展的重要基础,有效市场和有为政府是乡村产业发展升级的主要驱动力量,产业技术创新升级和品牌化规模化经营体系是产业升级的必然途径,制度的合理变迁和软硬基础设施建设是乡村产业发展升级的有力保障。在以上各因素的耦合作用下,乡村地区可以在不同要素禀赋结构下实现资源的最优配置,推动乡村产业高质量发展,加快农业农村现代化建设。

中国经济增长的动力溯源:人口红利还是教育红利?

在全面建设现代化产业体系过程中,充分挖掘人口资源优势对中国经济转型的影响作用至关重要。文章利用中国30个省份的面板数据,实证分析了2000—2021年劳动要素在中国经济中的贡献作用与门槛特征。结果表明:在中国经济增长过程中,人口红利与教育红利长期存在,教育红利一直是促进中国经济增长的主要动力因素;而在产业结构变迁过程中,人口红利的波动特征更为明显,人口红利与教育红利随着产业合理化水平的提升而减弱,随着产业高级化的推进而增强。由此提出,要在优化产业结构的同时稳定人口增长速度,促进教育人力资本的持续提升以及农村劳动力的合理流动。