Trends and driving forces of low-carbon energy technology innovation in China’s industrial sectors from 1998 to 2017: from a regional perspective

Low-carbon energy technology (LC) innovation contributes to both environmental protection and economic development. Using the panel data of 30 provinces/autonomous regions/municipalities in China from 1998 to 2017, this paper constructs a two-layer logarithmic mean Divisia index (LMDI) model to uncover the factors influencing the variation of the innovation of LC in China’s industrial sectors, including the alternative energy production technology (AEPT) and the energy conversation technology (ECT). The results show that China’s industrial LC patent applications rapidly increased after 2005 and AEPT patent applications outweighed ECT patent applications all the time with a gradually narrowing gap. Low-carbon degree played the dominant role in promoting the increase in China’s industrial LC patent applications, followed by the economic scale, R&D (research and development) efficiency, and R&D share. Economic structure contributed to the increases in LC patent applications in the central and the western regions, while led to the decreases in the eastern region, the north-eastern region, and Chinese mainland Xizang(Tibet) Autonoomous Region is not considered due to lack of data. This note applies to the entire article.. Low-carbon degree and economic scale were two main contributors to the growths of both industrial AEPT patent applications and ECT patent applications in Chinese mainland and the four regions. Several policy recommendations are made to further promote industrial innovation in China.     

A novel ultra-high-temperature oxidation protective MoSi2-TaSi2 ceramic coating for tantalum substrate

To protect refractory metal against oxidation at ultra-high temperatures, a MoSi₂-TaSi₂ ceramic coating was prepared on a pure tantalum (Ta) substrate using a novel three-step process, which included dip-coating with a molybdenum slurry, vacuum sintering, and halide-activated pack cementation (HAPC). The original coating had a MoSi₂-TaSi₂ double-layer structure from the surface to the substrate. After oxidation at 1700°C for 8 h in air, the coating exhibited a complex multi-layer structure composed of SiO₂-Mo₅Si₃-MoSi₂-(Mo,Ta)₅Si₃-TaSi₂-Ta₅Si₃ from the outer layer to the inner layer, due to the high-temperature phase transition and diffusion of Si and O. The coating effectively protected the Ta substrate at 1700°C for 12 h without failure, thereby demonstrating great improvement to its service life in an ultra-high-temperature aerobic environment. The protective effect was attributed to the integrity of the ceramic coating and the formation of a dense, uniform SiO₂ film that effectively lowered the inward oxygen diffusion rate.     

Provincial energy intensity in China: The role of urbanization

Chinese policymakers have attached great importance to energy intensity reduction. However, the unprecedented urbanization process exercises additional pressure on the realization of energy intensity reduction targets. A better understanding of the impacts of urbanization is necessary for designing effective policies aimed at reaching the next energy intensity reduction targets. This paper empirically investigates the impacts of urbanization on China's aggregate and disaggregated energy intensities using a balanced panel dataset of 30 provinces covering the period from 2000 to 2012 and panel estimation techniques. The results show that urbanization significantly increases aggregate energy intensity, electricity intensity and coal intensity.     

Chinese state and society in epidemic governance: A historical perspective

This paper looks at the role of state and society in the history of epidemic governance in China for an appreciation of the way China manages the current COVID-19 epidemic.     

TiO2／PSS自组装薄膜的光催化性能

利用静电自组装工艺在石英衬底上制备了结构有序的TiO2／PSS纳米复合膜，并采用UV-Vis-NIR分光光度计、原子力显微镜(AFM)对复合膜的结构与光催化性能进行了深入的研究。结果表明：有序多孔TiO2颗粒膜具有良好的光催化性能，能够在短时间内降解掉复合膜中有机成分，烧结处理薄膜的光催化性能明显优于紫外照射处理的样品。     

基于精益生产的企业价值流的研究

精益生产通过降低成本，资源浪费和生产时间，最大化地增加产品的价值，企业进行精益生产的过程实际上是形成一个连续的价值增值流的过程，本文阐述了价值流和价值流图的概念，并探讨了反映价值流动的价值流图的形式化描述以及价值流图和过程的关系。     

开槽机PLC控制的通信仿真研究

分析了对一种新型全自动开槽机PLC控制时对其进行通信仿真研究的必要性,建立了该通信仿真系统并简述了其工作原理,确定了PLC和上位机之间的通信方式,分别编制了PLC和上位机中的通信仿真程序及其通信仿真界面,成功地实现了对开槽机PLC控制程序的软件调试和监控。     

大力支持应用前景明确的创新研究

简要介绍了国家自然科学基金委员会机械工程学科８年来的资助项目及成果概况。总结了资助项目的５个特点，提出了正确处理基础研究中的前沿与应用、前沿与创新、前沿与基础等３个关系。     

HIGH TEMPERATURE MATERIALS AND STRENGTH STUDY IN CHINA

In the past half century China has developed and formed her own system of high temperature materials for power, automobile and aero-engine industries in the temperature range from 550 。C 1 100 。C. These high temperature materials include heat-resisting steels, iron-base, nickel-iron-base and nickel-base superalloys. Some achievements in high temperature strength study, new technologies and new alloy development are also discussed.     

夏商周青铜器铅同位素示踪研究数据库的构建

A data base of lead isotope ratio of ancient Chinese bronzes is set up. There are 2 888 members, including bronze objects, casting remains, and related ores, etc. in the file. The file contents of data base are made from analysis work on Chinese bronze previously carried out in several laboratories in China, Japan and USA. The main body of the file contents is formed from records, analysis data, reference documents, and images. The data base is designed for sharing information in provenance study on raw metal material for bronze production in China Bronze Age.