With the development of intelligent vehicles and autonomous driving technology,the safety of vulnerable road user(VRU)in traffic has been more guaranteed,and many research achievements have been made in the key area o...With the development of intelligent vehicles and autonomous driving technology,the safety of vulnerable road user(VRU)in traffic has been more guaranteed,and many research achievements have been made in the key area of collision avoidance decision-making methods.In this paper,the knowledge mapping method is used to mine the available literature in depth,and it is found that the research focus has shifted from the traditional accident cause analysis to emerging deep learning and virtual reality technology.This paper summarizes research on the three core dimensions of environmental perception,behavior cognition and collision avoidance decision-making in intelligent vehicle systems.In terms of perception,accurate identification of pedestrians and cyclists in complex environments is a major demand for VRU perception;in terms of behavior cognition,the coupling of VRU intention identification and motion trajectory prediction and other multiple factors needs further research;in terms of decision-making,the intention identification and trajectory prediction of collision objects are not included in the risk assessment model,and there is a lack of exploration specifically for cyclists'collision risk.On this basis,this paper provides guidance for the improvement of traffic safety of contemporary VRU under the conditions of intelligent and connected transportation.展开更多
[目的/意义]分析国内外互联网知识付费研究动态,为我国学者日后研究提供借鉴和参考。[方法/过程]以中国知网和Web of Science为数据源,从年代分布、学科分布、关键词分析了该领域的国内外研究现状,并就互联网知识付费的主体、运营模式...[目的/意义]分析国内外互联网知识付费研究动态,为我国学者日后研究提供借鉴和参考。[方法/过程]以中国知网和Web of Science为数据源,从年代分布、学科分布、关键词分析了该领域的国内外研究现状,并就互联网知识付费的主体、运营模式、用户行为等进行分类综述。[结果/结论]在研究论文数量方面,国外开展相关研究较早,近五年相关文献数量态势较平稳,而国内该领域的相关文献数量自2017年起迅速增长;在学科分布上,国内外研究主要涉及新闻学与传播学、经济管理学、图书馆情报与文献学等3个学科;从研究层面和研究对象上来看,国内侧重于宏观层面的理论探讨,而国外较注重对该领域参与者的分析。针对我国学者在今后开展互联网知识付费研究提出几条建议:一是在研究对象方面,加强对知识付费用户行为因素的研究,尽可能地对不同用户群体进行分类调研,比较不同用户群体的差异性,不断提高研究的普适性;二是在研究理论方面,充分考虑互联网知识付费的跨学科性,多学科研究理论和研究方法的交叉融合将能形成丰富的研究选题,提升研究的理论支撑度;三是在研究方法方面,积极引入多元的研究方法(如问卷调查、访谈、焦点小组等),或利用相应的仪器设备(如眼动、脑电等生理测试设备),形成定性与定量相结合的方法论体系,以确保研究结果的科学性。展开更多
基金funded by the National Natural Science Foundation of China,grant numbers 52072214 and 52242213.
文摘With the development of intelligent vehicles and autonomous driving technology,the safety of vulnerable road user(VRU)in traffic has been more guaranteed,and many research achievements have been made in the key area of collision avoidance decision-making methods.In this paper,the knowledge mapping method is used to mine the available literature in depth,and it is found that the research focus has shifted from the traditional accident cause analysis to emerging deep learning and virtual reality technology.This paper summarizes research on the three core dimensions of environmental perception,behavior cognition and collision avoidance decision-making in intelligent vehicle systems.In terms of perception,accurate identification of pedestrians and cyclists in complex environments is a major demand for VRU perception;in terms of behavior cognition,the coupling of VRU intention identification and motion trajectory prediction and other multiple factors needs further research;in terms of decision-making,the intention identification and trajectory prediction of collision objects are not included in the risk assessment model,and there is a lack of exploration specifically for cyclists'collision risk.On this basis,this paper provides guidance for the improvement of traffic safety of contemporary VRU under the conditions of intelligent and connected transportation.
文摘[目的/意义]分析国内外互联网知识付费研究动态,为我国学者日后研究提供借鉴和参考。[方法/过程]以中国知网和Web of Science为数据源,从年代分布、学科分布、关键词分析了该领域的国内外研究现状,并就互联网知识付费的主体、运营模式、用户行为等进行分类综述。[结果/结论]在研究论文数量方面,国外开展相关研究较早,近五年相关文献数量态势较平稳,而国内该领域的相关文献数量自2017年起迅速增长;在学科分布上,国内外研究主要涉及新闻学与传播学、经济管理学、图书馆情报与文献学等3个学科;从研究层面和研究对象上来看,国内侧重于宏观层面的理论探讨,而国外较注重对该领域参与者的分析。针对我国学者在今后开展互联网知识付费研究提出几条建议:一是在研究对象方面,加强对知识付费用户行为因素的研究,尽可能地对不同用户群体进行分类调研,比较不同用户群体的差异性,不断提高研究的普适性;二是在研究理论方面,充分考虑互联网知识付费的跨学科性,多学科研究理论和研究方法的交叉融合将能形成丰富的研究选题,提升研究的理论支撑度;三是在研究方法方面,积极引入多元的研究方法(如问卷调查、访谈、焦点小组等),或利用相应的仪器设备(如眼动、脑电等生理测试设备),形成定性与定量相结合的方法论体系,以确保研究结果的科学性。
