[ Objective] This study was to research the treatment effect of different media in undercurrent wetland on contamination, so as to pro- vide reference for rehabitating water body of river along small towns. [ Method ]...[ Objective] This study was to research the treatment effect of different media in undercurrent wetland on contamination, so as to pro- vide reference for rehabitating water body of river along small towns. [ Method ] Three different media of gravel, cobblestone and shale were used to rehabilitate water quality of contaminated river. [ Result ] Gravel, cobblestone and shale all performed well in removing TN, TP and CODw,, in contaminated water, of which gravel stuffed undercurrent wetland run best, averagely removing 49.4% TN, 34.7% and 48. 5% COD~, respectively. [ Conclusion] Undercurrent constructed wetland can effectively improve the water quality of contaminated river, and it is cheaper in cost and simpler in operation, thus suitable for generalizing in small towns of China.展开更多
With the global promotion of LED lighting products, the health and safety of LED products has drawn wider attention. This paper systematically introduces the ergonomic evaluation （methods and indicators） svstem for ...With the global promotion of LED lighting products, the health and safety of LED products has drawn wider attention. This paper systematically introduces the ergonomic evaluation （methods and indicators） svstem for heahh and comfort which differs from the traditional manpowered physical detection, and sketches out the evaluation indicators and its industrialization prospect.展开更多
文摘[ Objective] This study was to research the treatment effect of different media in undercurrent wetland on contamination, so as to pro- vide reference for rehabitating water body of river along small towns. [ Method ] Three different media of gravel, cobblestone and shale were used to rehabilitate water quality of contaminated river. [ Result ] Gravel, cobblestone and shale all performed well in removing TN, TP and CODw,, in contaminated water, of which gravel stuffed undercurrent wetland run best, averagely removing 49.4% TN, 34.7% and 48. 5% COD~, respectively. [ Conclusion] Undercurrent constructed wetland can effectively improve the water quality of contaminated river, and it is cheaper in cost and simpler in operation, thus suitable for generalizing in small towns of China.
文摘With the global promotion of LED lighting products, the health and safety of LED products has drawn wider attention. This paper systematically introduces the ergonomic evaluation （methods and indicators） svstem for heahh and comfort which differs from the traditional manpowered physical detection, and sketches out the evaluation indicators and its industrialization prospect.
