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“老水”与“转水”的成因及预防
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作者 翟洪民 《中国水产》 北大核心 2005年第8期51-51,共1页
生活在"老水"与"转水"中的鱼,不但不生长,反而容易引起鱼病的暴发流行和池塘内鱼类的大批死亡.何谓"老水"、"转水"呢? "老水",即水色大多呈铜绿色或暗绿色,且一天内不会发生变化,给... 生活在"老水"与"转水"中的鱼,不但不生长,反而容易引起鱼病的暴发流行和池塘内鱼类的大批死亡.何谓"老水"、"转水"呢? "老水",即水色大多呈铜绿色或暗绿色,且一天内不会发生变化,给人的感觉较混浊、较浓;测量池水透明度,一般小于20cm;池水中浮游植物占绝对优势,但大多数是不易消化的种类;池水光合作用层浅,溶解氧含量不足,鱼类长期浮头."老水"主要是长期投喂、施肥而不加水、或加水不排除老水、加水量仅能够补充水体蒸发消耗等原因造成. 展开更多
关键词 “老水” “转水” 成因 预防 质调节
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养殖水体“转水”的诊断及应对措施
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作者 徐大勇 董艳珍 韦汉群 《西昌学院学报(自然科学版)》 2004年第3期24-25,共2页
“转水”是养殖水体中较易发生的现象,它对水养养殖危害极大。本文就转水发生的原因、诊断技术以及应采取的应对措施进行了较为详细的介绍。
关键词 养殖 “转水” 诊断 应对措施
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“老水”“转水”的成因及预防
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作者 翟洪民 《内陆水产》 2005年第5期7-7,共1页
关键词 “老水” “转水” 成因 预防 池塘养鱼 质调节
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From Chooz to the Ling'ao NPP:The Technology Transfer of Pressurized Water Reactor Technology from France to China
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作者 CHEN Yue LI Yunyi 《Chinese Annals of History of Science and Technology》 2024年第1期97-124,共28页
The transfer of pressurized water reactor(PWR)technology from France to China is an important event in the history of Sino-French scientific and technological relations.China has gradually achieved self-reliance in th... The transfer of pressurized water reactor(PWR)technology from France to China is an important event in the history of Sino-French scientific and technological relations.China has gradually achieved self-reliance in the field of PWR technology through the introduction and subsequent absorption of France's 900 MW reactors.Compared with the process of introducing and absorbing similar technology from the United States by France,China's experience has been more complicated.This circumstance reflects the differences in the nuclear power technology systems between the two countries.France's industrial strength and early acquisition of nuclear power technology laid a solid foundation for mastering PWR technology.On the other hand,although China established a weak foundation through the implementation of the"728 Project,"and tried hard to negotiate with France,the substantive content of the technology transfer was very limited.By way of the policy transition from"unhooking of technology and trade"to"integration of technology and trade,"China ultimately accomplished the absorption and innovation of PWR technology through the Ling'ao NPP. 展开更多
关键词 pressurized water reactor(PWR) technology transfer Sino-French relations Chooz NPP Daya Bay NPP Ling'ao NPP
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