典型的如强调需求因素的扩散效应理论( Trick-down Approach)，以及从要素供给角度建立的新古典增长模型等，基于此类理论和模型的政策制定者所要担心的，仅仅是收敛速度缓慢的问题。
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研究结果还验证了扩散抑制及其扇形效应的构想，并支持注意后期选择理论。
The spreading inhibition of distractor, inhibition-based fan effect, and the theory of late-selection were generally supported.
基于标量衍射理论，考虑衍射效应的条件下，从理论上推导了编码孔径点扩散函数的公式，并对环形编码孔径进行了详细的讨论。
Considering diffraction effect based on scalar theory, we deduced a formula for point spread function of the coded aperture and discussed the ring coded aperture in detail.
水凝胶中扩散理论模型主要有自由体积模型、 流体力学模型、 位阻效应模型三大类；
The theoretical models consist of three categories: free volume, hydrodynamic, and obstruction effect models.
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