According to the scaled mixing depth, a year could be divided into three different periods, including the thermally stratified period, the isothermally mixed period, and the transition period.
依据混合深度的不同特征,在年内水库水体可划分为热成层时期,全混时期和两者之间的过渡期,藻类生物量与混合深度呈负相关。
This paper describes the preparation of strong composite gibbous hat through ana- lyzing of the difficulty selects epoxy-novolak resin as matrix,and glass cloth as reinforcement and succees in making strong heat-resistant composites by the wet lay-up hot compression moulding.
本文介绍了高强凸帽类复合材料产品的研制,通过难点分析,选用了环氧酚醛树脂作基体,玻璃布为增强材料,采用湿法层叠热压成型的工艺方法,得到了具有高强度、耐高温等性能的凸帽类复合材料产品。
