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Establishment and Control of Water Hyacinth(Eichhornia Crassipes) Invasive Species in Aquatic System
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作者 李竞 《海外英语》 2012年第23期282-285,共4页
This dissertation chiefly examines the functions of water hyacinth and discusses the potential problems associated with invasive species.In general,E.crassipes has significant potential as a source of biomass energy,s... This dissertation chiefly examines the functions of water hyacinth and discusses the potential problems associated with invasive species.In general,E.crassipes has significant potential as a source of biomass energy,such as improving physical properties of soil as well as soil structure;additionally,ventilates the soil and brings great conveniences for water penetrating through soil.With regard to the overall research,an amount of significant research has illustrated that water hyacinth can form dense mats that spread out across water surfaces in the end blocking the entire water body.Specifically,water hyacinth would change water clarity and lessening phytoplankton production,dissolved oxygen,nitrogen,phosphorous,heavy metals and concentrations of other pollutants.Relevant studies quoted in this report would gain prominence in further aquatic conservation and maintaining the integrity of ecosystem function since previous research and experience would be highlighted and explored in depth.Although some gaps between theory and experimental evidence still exist,preferable management method combines chemical,mechanical,fire and biological control methods with land management changes. 展开更多
关键词 EICHHORNIA CRASSIPES BIOLOGICAL control WATER hyac
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通信电缆(HYAC)
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《现代传输》 2018年第5期35-35,共1页
关键词 通信电缆 hyac
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自承式电缆用镀锌钢丝的试生产
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作者 谢建强 俞国森 《金属制品》 2004年第5期19-20,共2页
介绍自承式电缆用镀锌钢丝的技术要求 ,说明自承式电缆用镀锌钢丝的一般生产工艺。通过对低碳钢丝采用二相区的不完全热处理替代去除应力的球化退火工艺生产出了合格产品 ,并对生产中存在的断丝、脱锌、漏铁等问题在理论上进行分析 ,在... 介绍自承式电缆用镀锌钢丝的技术要求 ,说明自承式电缆用镀锌钢丝的一般生产工艺。通过对低碳钢丝采用二相区的不完全热处理替代去除应力的球化退火工艺生产出了合格产品 ,并对生产中存在的断丝、脱锌、漏铁等问题在理论上进行分析 ,在实践上采取措施予以解决。 展开更多
关键词 自承式电缆 镀锌钢丝 热处理
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