针对国内外新能源汽车产业的研究动态进行分析,以Web of Science核心集、中国知网、IncoPat专利数据库等为数据源,通过CiteSpace和Gephi工具进行学术文献与专利数据分析,对国内外新能源汽车产业研究现状进行系统总结和归纳。研究发现,...针对国内外新能源汽车产业的研究动态进行分析,以Web of Science核心集、中国知网、IncoPat专利数据库等为数据源,通过CiteSpace和Gephi工具进行学术文献与专利数据分析,对国内外新能源汽车产业研究现状进行系统总结和归纳。研究发现,国内外在新能源汽车领域的研究热点都集中在提升电池性能、充电技术、智能化等方面,但在政策驱动与技术创新的侧重点上存在差异。此外,中国专利活动主要聚焦于电池技术突破,而美国则在车辆控制系统及智能网联技术方面表现活跃。展开更多
When conducting company performance evaluations,the traditional method cannot reflect the distribution characteristics of the company’s operating conditions in the entire securities market.Gephi is an efficient tool ...When conducting company performance evaluations,the traditional method cannot reflect the distribution characteristics of the company’s operating conditions in the entire securities market.Gephi is an efficient tool for data analysis and visualization in the era of big data.It can convert the evaluation results of all listed companies into nodes and edges,and directly display them in the form of graphs,thus making up for the defects of traditional methods.This paper will take all the listed companies in the Shanghai and Shenzhen Stock Exchange as the analysis object.First uses tushare and web crawlers to collect the financial statement data of these companies.And then,uses the Economic Value Added model to calculate the EVA of each listed company and build graph data.Next,import the graph data into gephi to generate the distribution graph of all listed companies’performance,and summarize the distribution characteristics of business performance.Finally,select a listed company that you want to analyze in detail,using the traditional DuPont analysis method to conduct micro level visualization analysis of the business performance to find the main factors affecting the company’s operating performance.Incorporating gephi into traditional performance analysis methods will make the results of traditional analytical methods more effective and complete.展开更多
文摘针对国内外新能源汽车产业的研究动态进行分析,以Web of Science核心集、中国知网、IncoPat专利数据库等为数据源,通过CiteSpace和Gephi工具进行学术文献与专利数据分析,对国内外新能源汽车产业研究现状进行系统总结和归纳。研究发现,国内外在新能源汽车领域的研究热点都集中在提升电池性能、充电技术、智能化等方面,但在政策驱动与技术创新的侧重点上存在差异。此外,中国专利活动主要聚焦于电池技术突破,而美国则在车辆控制系统及智能网联技术方面表现活跃。
基金This research is funded by the National Social Science Fund Project,grant number 14BJL086.This research is funded by the Open Foundation for the University Innovation Platform in the Hunan Province,grant number 18K103Hunan Provincial Natural Science Foundation of China,grant number 2017JJ2016+2 种基金Accurate crawler design and implementation with a data cleaning function,National Students innovation and entrepreneurship of training program,grant number 201811532010This research work is implemented at the 2011 Collaborative Innovation Center for Development and Utilization of Finance and Economics Big Data Property,Universities of Hunan Province.Open project,grant number 20181901CRP03,20181901CRP04,20181901CRP05National Social Science Fund Project:Research on the Impact Mechanism of China’s Capital Space Flow on Regional Economic Development(Project No.14BJL086)。
文摘When conducting company performance evaluations,the traditional method cannot reflect the distribution characteristics of the company’s operating conditions in the entire securities market.Gephi is an efficient tool for data analysis and visualization in the era of big data.It can convert the evaluation results of all listed companies into nodes and edges,and directly display them in the form of graphs,thus making up for the defects of traditional methods.This paper will take all the listed companies in the Shanghai and Shenzhen Stock Exchange as the analysis object.First uses tushare and web crawlers to collect the financial statement data of these companies.And then,uses the Economic Value Added model to calculate the EVA of each listed company and build graph data.Next,import the graph data into gephi to generate the distribution graph of all listed companies’performance,and summarize the distribution characteristics of business performance.Finally,select a listed company that you want to analyze in detail,using the traditional DuPont analysis method to conduct micro level visualization analysis of the business performance to find the main factors affecting the company’s operating performance.Incorporating gephi into traditional performance analysis methods will make the results of traditional analytical methods more effective and complete.
