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道路照明节能控制系统设计 被引量:10
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作者 蔡可健 《电力电子技术》 CSCD 北大核心 2006年第6期14-15,39,共3页
道路及隧道照明设施的规模越来越大,照明耗能在迅速上升。针对此问题,讨论了可行的照明节能新途径。设计出了一种时控节能照明电路。它依据气体放电光源在工作电流适当减少时仍能正常运行的原理。在后半夜车稀人少时,自动降低光源电流,... 道路及隧道照明设施的规模越来越大,照明耗能在迅速上升。针对此问题,讨论了可行的照明节能新途径。设计出了一种时控节能照明电路。它依据气体放电光源在工作电流适当减少时仍能正常运行的原理。在后半夜车稀人少时,自动降低光源电流,减少在路灯系统能耗中占主要比例的光源能耗,以达到路灯系统整体节能的目的,而且还避免了光源后半夜的过压运行,延长了路灯寿命。与传统照明电路相比,节电率在20%以上。该电路实施方便,运行可靠,可使照明工程既满足功能性的要求,又能实现最大限度的节能。 展开更多
关键词 照明 节能 控制/照度 路灯 单片机
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Fruit protected cultivation in China 被引量:2
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作者 Gao Huajun, Wang Saoming, and Wang Jiaxi Shandong Institute of Pomology, Tai’an 271000, China 《Hunan Agricultural Science & Technology Newsletter》 2003年第3期2-9,共8页
Protected fruit cultivation in China has developed very quickly from the early 1990s, and now it is an important branch in fruit cultivation. A brief review including fruit species, developing history, growing area, o... Protected fruit cultivation in China has developed very quickly from the early 1990s, and now it is an important branch in fruit cultivation. A brief review including fruit species, developing history, growing area, output, and distribution in the whole country is made in the paper. Characteristics of the dominant kinds of greenhouse, environmental control methods, and standards of temperature, humidity, light and CO2 for different fruit species are presented. Information on varieties, growing benefits, special management practices and other aspects of the main fruit species used for protected cultivation are also presented. 展开更多
关键词 FRUIT protected cultivation GREENHOUSE environmental control
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