通过引入辅助问题并利用积分变换方法，推导出二维、双层球壳红外CAT通用算法，并对内表面为第三类边界条件进行了分析和讨论。
A general solution of IR CAT for two dimensions and two layers spherical shell is developed by introducing an auxiliary problem and using the integral transforms.
本文介绍了双层浮球式生物滤器在封闭循环式鲟鱼养殖生产中的应用情况。
The present paper described the application of floating bead biofilter in recirculating sturgeon culture system.
介绍一种新开发的滤料，纤维球——砂双层滤料的试验概况。
The main objective of this paper is to introduce the study made on a new type dual media namely the fibre-pellet-sand aed.
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