Progress of welding technology in aviation industry

Welding in aviation industry has become one of the dominate processing technologies for manufacturing flying apparatus.The percentage of welded structures in designs of new flying apparatus has been continuously growing up.Welding technology provides a freedom and guarantee to new structure design and new material application. Technical and economic benefits have been obtaining in application of newly developed welding technologies and achievements in research, such as, SPF/DB,electron beam welding, breezing,low stress nondistortion welding etc.

Progress of the Chinese shipbuilding industry and welding technology

The China state shipbuilding corporation (CSSC), a leading shipbuilding enterprise of the Chinese shipbuilding industry, has made rapid progress during recent years. The welding technology, considered as the crucial factor in the development of the industry, plays a significant role. This paper presents the growth of shipbuilding technology, the associated welding processes and the prospects for the shipbuilding industry.

Will Market-Oriented Reforms Propel Technology Progress?Empirical Evidence from China’s High-Tech Sectors

This paper aims to explore the effects of market-oriented reforms on industrial technology progress.Based on a theoretical analysis,we performed an empirical study with a marketization index and panel data of high-tech sectors in China.We found that market-oriented reforms had significantly propelled technology progress in China’s high-tech sectors,and the effects became more evident after China’s WTO entry.Market-oriented reforms induced technology progress by increasing capital allocation efficiency,R&D input,and technology diffusion.Among various aspects of market-oriented reforms,the institutional environment exerted the most significant effects,followed by the economy’s non-state sector,product market development,and factor market development;the government-market relationship index influenced technology’s progress the least.The effects are heterogeneous across sectors with different technology attributes and more significant for technology-intensive sectors.Our findings offer policy implications for China’s ongoing market-oriented reforms and policy design for technology progress in high-tech sectors.

Changes in Total Factor Productivity,Technological Progress and Efficiency of Banana Industry in China

Based on the DEA-based Malmquist index method,the total factor productivity was calculated for 5 major banana production areas in 2003-2004,and it was further divided into technological progress and technical efficiency.The results show that the total factor productivity of banana industry in China was 1.3% in the sample period,mainly due to technological progress,the average growth rate was 2.6%,while the pure technical efficiency and scale efficiency was -0.1% and -1.2% respectively.The improvement of total factor productivity in banana industry in China relied mainly on technological progress,cultivation of new banana varieties,management of high quality cultivation,popularization and application of water conservation and fertilizer saving technology,and injury-free picking technologies.The pure technical efficiency and scale efficiency of banana production were negative,indicating that the management level of banana was not high.The effect of scale economy of this industry through agglomeration and consolidation is still to be practiced.Banana growers should promote the improvement of large scale and management level of the banana industry at the same time of promoting the technological progress.

Productivity Growth, Technological Progress, and Efficiency Change in Vietnamese Manufacturing Industries: A Stochastic Frontier Approach

This study applies a stochastic frontier production approach to decompose the sources of total productivity (TFP) growth into technical progress and changes in technical efficiency of 8057 firms in Vietnamese manufacturing industries during 2003-2007. Using both total manufacturing industry and sub-manufacturing industrial regressions, the analysis focuses on the trend of technological progress (TP) and technical efficiency change (TEC), and the role of productivity change in economic growth. According to the estimated results, the annual technical progress for the manufacturing industry and sub-manufacturing industries are calculated directly from the estimated parameters of the translog stochastic frontier production function by taking a partial derivative of output with respect to time t. The average technical changes in manufacturing industry and sub-manufacturing industries are positive, with an average technical change about 5.2%, 5.8%, 5.4%, 11.8%, 4.6%, 4.1%, 7.3%, 4.8%, 4.8% and 4.8% for total sample, food products & beverages, textile & wearing apparel, footwear, paper & products, industrial chemicals, rubber & plastic products, non- metallic mineral, basic & fabricated metal and other sub-industries, respectively. Total TFP in the manufacturing sector has grown at the annual rate of 0.052, although the rate of growth decreased continuously during the sample period. For the sub-industry estimates during the sample period, TFP grew fastest in the footwear sub-industry, with annual average growth rate of 11.8%, followed by the rubber & plastic products with a rate of 7.3%, and the food products & beverages with a rate of 5.8% per annum.

Spatial Pattern Evolution and Industrial Characteristics of Economic and Technological Development Zones and High-tech Industrial Zones in China

Economic and technological development zone and high-tech industrial zone are important types of development zone in China,and there are differences in their connotation and goal setting.In this paper,basic data of national and provincial economic and technological development zones and high-tech industrial zones in China were collected and arranged.Kernel density analysis and other GIS spatial analysis techniques were used to analyze the evolution laws of spatial patterns of economic and technological development zones and high-tech industrial zones in cities from 2006 to 2018.First,the agglomeration intensity was compared by measuring the degree of regional agglomeration and dispersion on the two time nodes.Next,kernel density method was used to explore the evolution of the two in the spatial layout and location,and analyze development commonness and difference of economic and technological development zones and high-tech industrial zones.Finally,the trend and reason of spatial evolution of development zones with different leading industries were explored.Research results show that:①the agglomeration degree of layout of high-tech industrial zones is stronger than that of economic and technological development zones,and there are similarities and differences in distribution trend of spatial patterns of the two types of development zones;②the distribution of labor-intensive,capital-intensive and technology-intensive development zones is concentrated at smaller scales and dispersed at larger ones;③although there are differences between the economic and technological development zones and the high-tech industrial zones in the goal,support,structure and function,management system and so on,their spatial development presents a trend of convergence.In the future,when enhancing urban-rural planning and public administration,governments should combine the trend of industrial transformation and upgrading,and optimize spatial layout of development zones by adjusting industrial structure,layout,transportation and land use.

Progress in Technology of Main Liquid Rocket Engines of Launch Vehicles in China

Liquid propellant rocket engines for a launch vehicle are an essential aerospace technology, representing the advanced level of hi-tech in a country. In recent years, China’s aerospace industry has made remarkable achievements, and liquid rocket engine technology has also been effectively developed. In this article, the development processes of China’s liquid rocket engines are discussed. Then, the performance features of China’s new generation liquid rocket engines as well as the flight tests of the new-generation launch vehicles are introduced. Finally, the development direction and the most recent progress of the next generation large-thrust liquid rocket engine is presented.

Empirical Analysis of the Impact of Green Finance and Technological Progress on Total Factor Productivity in China’s Industrial Sector

The enhancement of industrial green total factor productivity is pivotal for achieving high-quality and sustainable economic development.This study assesses China’s performance using the SBM-GML model,employing province-level panel data spanning from 2004 to 2020.Furthermore,we examine the influence of green finance and technological progress on industrial green total factor productivity using a spatial econometric model.The findings uncover that the relationship between the level of green financial development and industrial green total factor productivity follows a U-shaped curve.Initially,low levels of green financial development exert a suppressive effect on industrial green total factor productivity,proving ineffective in the short term.However,with the progression of green finance development,a positive and significant long-term impact on industrial green total factor productivity emerges.Moreover,technological progress demonstrates a noteworthy promotional effect on industrial green total factor productivity.The analysis delves deeper into revealing that industrial structure and environmental regulation intensity exhibit a significant negative relationship with industrial green total factor productivity.In contrast,both energy structure and education level showcase a substantial positive relationship with industrial green total factor productivity.

Financial Capital Deepening, Technological Progress and Industrial Structure Upgrading

A necessary condition for realizing macroeconomics is to rationally upgrade the industrial structure.In this process of upgrading,financial capital deepening and technological progress are important ways to promote the upgrading of industrial structure.From an endogenous perspective,this essay explores the internal links between financial capital deepening,technological progress,and industrial structure upgrading.The analysis shows that factors of technological progress have not make a tremendous impact on the upgrading of Chinese industrial structure,nor are they a positive reason for promoting the development of the industry to a higher level.The deepening of financial capital obviously promotes the optimization and upgrading of industrial institutions,which is its main factor.

The Progress on China's Petrochemical Technologies

The progress of petrochemical technologies in China is introduced on the basis of briefing current status of China’s petrochemical industry. Prospects are made on the development of China’s petrochemical technologies in the early 21st century.

Progress and industrialization development trends of the anaerobic digestion technologies for bio-natural gas

The production of bio-natural gas through anaerobic digestion not only realize the resource utilization and harmless treatment of urban and rural organic wastes,but also reduce the emission of methane and carbon dioxide.However,as an independently industry,bio-natural gas has some prominent challenges compared to household biogas and small-scale biogas projects.For the healthy development of the bio-natural gas industry,system analysis and planning have become particularly important.This study reviews the current development status of the bio-natural gas industry and innovatively analyzes the development direction of industry from a multidimensional perspective.Leading opinions are provided based on system analysis.Three major technological breakthroughs that have supported the success of regional bio-natural gas industry are revealed.The completeness of industrial technology,the objectivity of industrial regional development and the inevitability of the comprehensive benefits of the industrial chain are the major development direction of the bio-natural gas.Finally,according to the three major demands of new energy fuel,electricity and energy storage,two new energy systems based on bio-natural gas and the synergistic development of multiple new energy sources are proposed.This study provides theoretical and practical guidance for the bio-natural gas industry.

数字经济、技术进步与制造业转型升级

制造业水平是一个国家综合实力和国际竞争力的重要标志,技术进步提供了制造业转型升级的动力和基础。而数字经济作为推动技术进步和企业变革的重要力量,为传统制造业注入新的增长动力。基于2010—2020年我国省级面板数据,运用固定效应模型和门槛效应模型实证研究数字经济背景下技术进步对我国制造业转型升级的作用机制,并探究数字经济在此过程中发挥的调节效应。研究结果显示:(1)数字经济时代下,技术进步对制造业转型升级依旧具有很强的驱动效应;(2)在技术进步对制造业转型升级的作用过程中,数字经济可以有效发挥正向调节作用;(3)技术进步驱动制造业转型升级存在显著的数字经济门槛效应。

Textile Industry Twelfthy-Five-Year-Plan Technology Progress Outline Release

Nov. 19th, Beijing. China National Textile & Apparel Council release the Textile Industry Twelfthy-Five-Year-Plan Technology Progress Outline. The outline describes the key tasks of technology progress

农村产业融合的农业碳减排效应研究

运用2011—2020年中国30个省份面板数据,采用双向固定效应模型实证分析农村产业融合对农业碳排放的影响及其作用渠道。结果表明:农村产业融合显著抑制农业碳排放,在经过一系列稳健性检验后结论依旧成立;机制分析表明,农业技术进步是农村产业融合发展抑制农业碳排放的重要渠道;异质性分析表明,在农村数字化水平更高的地区,农村产业融合的农业碳减排效应更加明显;相较于粮食主产区、东部地区,农村产业融合的农业碳减排效应在非粮食主产区、中西部地区更为显著。基于此,建议因地制宜地推动一二三产业深度融合发展,加快数字乡村建设,不断加强数字技术赋能农业,增强农村产业韧性,全面推动农业农村现代化。

数字技术进步如何影响我国就业技能结构--基于省级面板数据的研究

本文通过构建2010—2020年省级面板数据,针对数字技术进步与我国就业技能结构之间的关系展开实证研究,分析了消费互联网和工业互联网两类技术对就业技能结构的影响及其作用机制。研究结果表明:(1)从全国层面来看,消费互联网和工业互联网发展均提升中高技能就业人数占比,降低低技能就业人数占比,数字技术进步总体上促进了我国就业技能结构升级。(2)从影响程度来看,工业互联网发展对就业结构升级的促进作用明显高于消费互联网。(3)从影响方式来看,工业互联网主要通过提升高技能劳动者相对薪资水平促进就业结构升级;而消费互联网在提升高技能溢价的同时也增加中等技能劳动者的相对薪资水平,同时通过提升地区生活成本挤出低技能劳动力。(4)从影响范围来看,消费互联网发展推动就业技能结构升级的影响范围更广,而工业互联网发展的就业技能结构升级作用则集中于中、西部地区。结论的政策含义是,应当持续推进数字技术进步,重视工业互联网技术对就业结构升级的基础作用,同时充分发挥消费互联网的岗位创造作用,各地区在发展数字经济时应注意不同类型数字技术对地区人力资本水平提升效果上的差异,同时加强区域间数字经济一体化建设。

新质生产力驱动农业产业链供应链现代化:理论机制与实证检验

文章基于2012—2022年中国30个省份的面板数据,深入考察新质生产力对农业产业链供应链现代化的影响及作用机制。研究表明,新质生产力发展与农业产业链供应链现代化具有显著正相关关系。中介效应检验结果表明,推动农业技术进步和乡村产业融合是新质生产力影响农业产业链供应链现代化的关键途径。异质性分析结果显示,在东部地区和农业劳动生产率较高地区,新质生产力对农业产业链供应链现代化的赋能效应更为明显。空间溢出效应检验结果表明,新质生产力不仅可驱动本地区农业产业链供应链现代化发展,而且能够对周边地区农业产业链供应链现代化产生正向影响。

技术进步偏向、要素适宜性与环境治理效能——基于制造业面板数据的实证检验

技术进步偏向与要素禀赋结构适宜性是影响环境治理效能的关键因素。本文在阐明技术进步偏向对环境治理效能作用机制的基础上,使用2004-2020年制造业27个细分行业面板数据,构建技术进步偏向指数测度模型与环境治理效能动态模型,实证检验了技术进步偏向对制造业细分行业环境治理效能的影响,并通过质性检验验证研究结论的稳健性。实证结果显示,技术进步偏向与环境治理效能之间呈现正相关关系,技术进步偏向与要素禀赋结构适宜性越高,环境治理效能越高,技术进步偏向通过投资、需求、研发、资本配置效率共同作用于环境治理效能。

基于PDA模型的中国水资源消耗及其政策影响因素研究

利用中国2011—2020年31个省(自治区、直辖市)三大产业面板数据,基于生产理论分解方法,选取多层级共同前沿DEA模型中的非径向距离函数,对中国水资源消耗及其政策影响因素进行了分析。结果表明,西部地区正逐渐成为中国第二大水资源消耗区域,且中国水资源消耗从“一二三”向“一三二”的产业用水态势转变;在提出的新分解因素中,产业结构调整、区域均衡发展和市场化改革分别有助于减少西、中、东部地区的水资源消耗;在所有的分解因素中,技术效率对减少水资源消耗的贡献最为突出。提出了加快产业结构调整、提高产业数字化和绿色化对水资源利用的正向影响等政策建议。

新质生产力对创新生态系统韧性的影响研究

积极培育新质生产力增强创新生态系统韧性是我国实现经济高质量发展的重要引擎之一。本文基于2013~2023年中国30个省(区、市)面板数据,探讨了新质生产力对创新生态系统韧性的影响及其作用机制。研究表明,新质生产力发展能增强创新生态系统韧性,劳动资料对创新生态系统韧性的促进作用最强;作用效果因地理位置和经济发展水平表现出明显的异质性,东部地区和高经济发展水平地区赋能效果更好;从传导机制来看,新质生产力可通过劳动力结构优化、技术创新进步和产业结构升级赋能创新生态系统韧性;另外,新质生产力对创新生态系统韧性的促进作用具有阶段性特征。以上结果深化了新质生产力对创新生态系统韧性的相关研究,可为政策制定提供理论支持和实践指导。

数农融合发展对农业韧性的影响

数字经济与农业融合发展改变了传统农业低值低效的发展模式,而面对气候、市场等外部风险威胁,数农融合抵御不确定性冲击的能力尚未可知。本文以2010—2021年中国30个省份数据为样本,对数农融合发展水平进行全面评估,并构建农业韧性的多维度量化标准,借助双向固定效应模型、系统广义矩估计模型、三步法分析模型、空间杜宾模型从静态和动态双视角剖析数农融合发展对农业韧性的赋能效果与作用机制。研究结果显示,数农融合发展在静态和动态视角下均对农业韧性存在正向影响,短期内促进适应性和抵抗性,长期内对预防性、抵抗性和适应性贡献显著。在粮食主产区、高数字经济区域,数农融合发展的赋能效果更明显。传导机制方面,数农融合对农业韧性的赋能效果受农业技术进步、农业产业集聚和农村经济增长的影响。数农融合发展不仅对本地区农业韧性提升有积极作用,而且对周边地区农业韧性存在空间溢出效应。本文的研究可以为强化农业韧性、保障粮食安全、建设农业现代化强国的政策制定提供经验依据。