高空风力发电系统安全风险评估体系     

李晓宇  张炳成  任宗栋  褚峥 《中国勘察设计》2023,(S1):26-29

<正>我国风能储量大、分布面广,风力发电装机规模稳居世界第一。但受限于材料、工艺与建设成本,现有形式的风力发电机组离地高度通常低于200m。根据激光雷达对0到3000m高度的风速观测显示^[1],1500m的平均风速是地面平均风速的2.4倍,3000m的平均风速是地面平均风速的3.8倍,可达9.5m/s,并且风向稳定、间歇性小,具备持续开发的潜力和价值。  相似文献   

达里诺尔湿地水环境和鱼类多样性调查Ⅲ.达里湖水体中的氮和磷含量及分布     

杨富亿  文波龙  李晓宇  杨艳丽  万斯昂  欧阳玲  刘文虎  王昭伟  孟祥鹏  李重祥  阿拉木斯  韩奇 《湿地科学》2021,(1):47-58

达里湖是达里诺尔湿地的重要组成部分.2019年,对达里湖开展了野外调查并采集了水样,测定了水样的氮、磷含量和非离子氨含量与水体pH的关系,并将研究结果与以往的达里湖相对应的调查资料进行比较,探讨了达里湖水体中氮、磷含量特征的形成及其对达里湖鱼类物种多样性的影响.研究结果表明,2019年7月,达里湖水体中的CODCr和C...  相似文献   

Life cycle and secondary production of two mayflies <Emphasis Type="Italic">Leptophlebia</Emphasis> sp. and <Emphasis Type="Italic">Ephemera</Emphasis> sp. in Heizhuchong stream,Hubei, China     

李晓宇  闫云君 《中国海洋湖沼学报》2008,26(1):97-103

From June 2003 to June 2004, an investigation on the life cycle, production and trophic basis of dominant species of macrozoobenthos community in a second-order river of the Hanjiang River basin, Hubei, China was carded out. The results showed that the dominant species Leptophlebia sp. and Ephemera sp. appeared to develop two generations per year, and there was a small overlap in the two generations of both species. The pupation of Leptophlebia sp. mainly occurred in autumn and winter, while pupation of Ephemera sp. mainly took place in summer and winter. The standing stocks of the Leptophlebia sp. population and Ephemera sp. population had two peaks in a year. The cohort production and cohort P/B ratio of the Leptophlebia sp. population estimated by size frequency method were 19.018 1 g/m^2.a and 5.7 respectively, while its annual production and P/B ratio were 38.036 2 g/m^2.a and 11.4. The cohort production and cohort P/B ratio of the Ephemera sp. population were 38.015 9 g/m^2.a and 5.9, while its annual production and P/B ratio were 76.031 8 g/m^2.a and 11.8.  相似文献