Search

Natural uranium is an important material basis to ensure the sustainable and stable development of national nuclear energy. Ocean contains abundant natural uranium resources, and the extraction of uranium from seawater is of great strategic and economic significance for supplementing and improving our country’s uranium supply system and realizing the autonomy of natural uranium supply. In this paper, the latest progress in the research direction of seawater uranium extraction technology in recent years is reviewed. This paper mainly summarizes the research results of adsorption materials and field tests for uranium extraction from seawater at home and abroad, and prospects the future development of uranium extraction from seawater.

本研究旨在探討1989至2008年間，台灣、香港、大陸地區工程類文獻作者之共同合作情形。透過兩岸三地被科學引文索引擴大版（Science Citation Index Expanded, SCIE）資料庫蒐錄之文獻數量，進一步觀察14類工程學門中作者人數、作者合作對象、高產量機構及其合作對象，以及作者人數與文獻被引用次數間是否相關。研究結果顯示在14類工程學科中，兩岸三地皆以免疫生物醫學工程之平均合作作者人數為最高，環境工程亦同樣在三地都有較高平均作者人數的表現。由此可見，免疫生物醫學工程及環境工程都是較多學者共同合作研究產出的學科。兩岸三地之多作者文獻比率皆在 90%左右，單一作者文獻數較少。在高產機構方面，台灣集中於台灣大學、成功大學、清華大學、交通大學，並發現台灣大學的研究者最常與同校研究者共同合作。此外，兩岸三地之跨國合作對象皆以美國為最多。最後探討作者人數與文獻被引用次數間是否相關，發現兩岸三地單一作者產出之文獻的被引用次數普遍較低，但皆無法明顯看出作者人數與文獻被引用次數間的 關係。The purpose of this research is to investigate the author productivity and degree of collaboration in the literature of engineering for Taiwan, Hong Kong,and Mainland China from 1989 to 2008. The data were collected from the SCIE database for 14 engineering disciplines. The average authors per article,the researcher with whom the authors collaborate, the highly productive institutions, the correlation between the number of authors and the frequency of being cited are explored. The results of the study reveal that 1. Biomedical engineering and environmental engineering have the highest average number of author collaborations in Taiwan, Hong Kong, and the mainland China; 2. The percentage of multi-author literature is approximately 90% in Taiwan, Hong Kong, and the mainland China; 3. There are only a few single-author papers; 4.For highly productive organizations, the majority of author collaborations have a higher concentration in National Taiwan University, National Cheng Kung University, National Tsing Hua University, and National Chaio Tung University in Taiwan; 5. The researchers from National Taiwan University collaborate mostly with the researchers from the same university; 6. Taiwan, Hong Kong, and the mainland China have the most international collaboration with the United States of America; 7. The single-author paper in Taiwan, Hong Kong, and the mainland China has a lower frequency of being cited in general; 8.There is no correlation between the number of authors and the frequency of beingcited.