19-year tidal data of the 3 stations, Huludao, Qinhuangdao and Kanmen, have totally been analysed, and the amplitudes and phases of 472 tidal constituents have been calculated with a resolution of Δ≥ 0.002 2 /h. Bas...19-year tidal data of the 3 stations, Huludao, Qinhuangdao and Kanmen, have totally been analysed, and the amplitudes and phases of 472 tidal constituents have been calculated with a resolution of Δ≥ 0.002 2 /h. Based on the draconitic tide, the anomalistic tide and pole tide obtained, the ultra-long-period variations of the mean sea level have been predicted. The annual tidal analysis of 19-year data at the above-mentioned stations and at Tanggu, Longkou has been carried out. The stability of the annual tidal analysis has been investigated with regard to the astronomical factors, the nonlinear effects and the variations of sea-bottom topography.展开更多
以Web of Science数据库中收录的SARS相关文献为数据源,采用一种新兴的科学计量学分析方法—引文出版年光谱,对SARS领域进行整体分析,梳理SARS研究的历史起源(1890-2002年)和发展演化(2002-2020年)过程,得出SARS研究的峰值、演化规律、...以Web of Science数据库中收录的SARS相关文献为数据源,采用一种新兴的科学计量学分析方法—引文出版年光谱,对SARS领域进行整体分析,梳理SARS研究的历史起源(1890-2002年)和发展演化(2002-2020年)过程,得出SARS研究的峰值、演化规律、期刊分布等,为新型冠状病毒肺炎疫情的防治和研究提供情报支持。展开更多
文摘19-year tidal data of the 3 stations, Huludao, Qinhuangdao and Kanmen, have totally been analysed, and the amplitudes and phases of 472 tidal constituents have been calculated with a resolution of Δ≥ 0.002 2 /h. Based on the draconitic tide, the anomalistic tide and pole tide obtained, the ultra-long-period variations of the mean sea level have been predicted. The annual tidal analysis of 19-year data at the above-mentioned stations and at Tanggu, Longkou has been carried out. The stability of the annual tidal analysis has been investigated with regard to the astronomical factors, the nonlinear effects and the variations of sea-bottom topography.
文摘以Web of Science数据库中收录的SARS相关文献为数据源,采用一种新兴的科学计量学分析方法—引文出版年光谱,对SARS领域进行整体分析,梳理SARS研究的历史起源(1890-2002年)和发展演化(2002-2020年)过程,得出SARS研究的峰值、演化规律、期刊分布等,为新型冠状病毒肺炎疫情的防治和研究提供情报支持。
