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Yuxiang Zhang Haixu Bo Zhe Jiang Yu Wang Yunfei Fu Bingwei Cao Xuewen Wang Jiaqi Chen Rui Li 《国家科学评论(英文版)》2021,8(11)
In early 2020, unprecedented lockdowns and travel bans were implemented in Chinese mainland to fight COVID-19, which led to a large reduction in anthropogenic emissions. This provided a unique opportunity to isolate the effects from emission and meteorology on tropospheric nitrogen dioxide (NO2). Comparing the atmospheric NO2 in 2020 with that in 2017, we found the changes of emission have led to a 49.3 ± 23.5% reduction, which was ∼12% more than satellite-observed reduction of 37.8 ± 16.3%. The discrepancy was mainly a result of changes of meteorology, which have contributed to an 8.1 ± 14.2% increase of NO2. We also revealed that the emission-induced reduction of NO2 has significantly negative correlations to human mobility, particularly that inside the city. The intra-city migration index derived from Baidu Location-Based-Service can explain 40.4% ± 17.7% variance of the emission-induced reduction of NO2 in 29 megacities, each of which has a population of over 8 million in Chinese mainland. 相似文献
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《Information processing & management》2022,59(1):102796
In the period of Corona Virus Disease 2019 (COVID-19), millions of people participate in the discussion of COVID-19 on the Internet, which can easily trigger public opinion and threaten social stability. This paper creatively proposes a multi-stage risk grading model of Internet public opinion for public health emergencies. On the basis of general public opinion risk grading analysis, the model continuously pays attention to the risk level of Internet public opinion based on the time scale of regular or major information updates. This model combines Analytic Hierarchy Process Sort II (AHPSort II) and Swing Weighting (SW) methods and proposes a new Multi-Criteria Decision Making (MCDM) method – AHPSort II-SW. Intuitionistic fuzzy number and linguistic fuzzy number are introduced into the model to evaluate the criteria that cannot be quantified. The multi-stage model is tested using more than 2,000 textual data about COVID-19 collected from Microblog, a leading social media platform in China. Seven public opinion risk assessments were conducted from January 23 to April 8, 2020. The empirical results show that in the early COVID-19 outbreak, the risk of public opinion is more serious on macroscopic view. In details, the risk of public opinion decreases slowly with time, but the emergence of important events may still increase the risk of public opinion. The analysis results are in line with the actual situation and verify the effectiveness of the method. Comparative analysis indicates the improved method is proved to be superior and effective, sensitivity analysis confirms its stability. Finally, management suggestions was provided, this study contributes to the literature on public opinion risk assessment and provides implications for practice. 相似文献
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《Endeavour》2022,46(3):100835
In summer 2021, the Virtual History of Science, Technology, and Medicine group hosted two online panels on pseudoscience topics including Flat Earth, Hollow Earth, geohistory, alternate evolution, and forgeries. The panels discussed the roles of such theories in the history of science, as well as the public’s understanding of both history and science. 相似文献
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新冠疫情增加了逆全球化趋势,疫情防控与中国国家形象塑造成为当前中国政府和社会各界关注的重要议题。2022年北京冬奥会作为后疫情时代中国最大的主场外交活动之一,是提升我国体育国际话语权、改善国家形象的重要机遇。基于此,结合当前全球疫情背景,从国际关系、国际舆论、国内发展状况等角度综合分析了北京冬奥会国际传播面临的机遇与挑战,并从国际传播战略和国际传播实践策略两个层面出发,提出战略规划和策略实施的具体路径,以期提高体育国际传播效果,增强中国体育国际话语权,构建国际传播新格局。 相似文献
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席海龙 《首都体育学院学报》2005,17(3):56-58
本文主要采用社会测量法,对我国U19男子足球队队员间人际关系的现状以及其与球队成绩的关系进行了调查和分析。研究发现:我国U19男子足球队队员间人际关系融洽程度不高;球队的比赛成绩与队员间人际关系水平呈正相关,队员间人际关系是影响比赛成绩的因素之一;球队中,小团体的数量一般为3到5个,人缘型队员的数量为1到2个,嫌弃型队员的数量不等;球员在选择朋友时,心理因素因朋友类型不同而有所差异,基本上从品德、性格、能力、相似性、邻近性、补偿性等方面考虑。 相似文献
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近两届冬奥会女子自由式滑雪空中技巧比较研究 总被引:4,自引:0,他引:4
通过对 1998年第 18届冬奥会与 2 0 0 2年第 19届冬奥会女子自由式滑雪空中技巧比赛的动作难度、动作质量及实力格局的比较研究表明 :4年来世界女子自由式滑雪空中技巧项目的动作难度与动作质量呈显著同步提高之势 ,揭示了该项目的发展方向 ;从上届冬奥会的美、中、瑞、乌 4强到本届冬奥会的澳、加、俄、中 4强 ,世界女子自由式滑雪空中技巧项目的实力格局发生了变化 ;以李妮娜为代表的我国年轻运动员已跻身世界优秀运动员行列 相似文献
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在抗击新冠肺炎疫情过程中形成的抗疫精神是新时期大学生思想政治教育的重要内容,通过在课程教学中渗透抗疫精神、在科研和实验实习中融入抗疫精神、在学生活动中彰显抗疫精神,能有效促进学生高尚世界观、人生观、价值观的形成。 相似文献