This paper divides the "principle" into two different dimensions according to different depth: one is the basic theory as source and the other is the direct theory as ground.
本文将“原理”区分为两个深浅不同的维度：即作为渊源的基础性理论，和作为依据的直接性理论。
The propagation of wave packet produced from a point source in two and three dimensional incompressible boundary layer is investigated numerically on the basis of linear stability theory.
根据线性稳定性理论研究点源产生的波包在二维和三维不可压边界层中的传播特征。
An interactive algorithm of two-level data fusion based on evidence theory is presented. Different information-source data received by the data fusion system are classified in detail.
在充分利用信息处理中心的人工情报和其它信息源数据的基础上，提出了基于证据理论的交互式二级融合算法。
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