提出了一个安全数据库访问控制模型，包括一个多层关系模型和一个用以增强自主访问控制能力的元素级粒度的授权。
In this paper, we proposed a formal security database system access model including a multilevel relation model and a element-level authorization.
对线性网络的模型选择和多层前馈网络的关系做了细致的研究，并分别进行了仿真。
A delicate research about the relationship of the selection of model of the linear network part and the multi-layered feed-forward network part and simulation are presented.
多层膜厚度和磁致相位之间的关系，研究发现两个模型结果在较低磁场下是相吻合的。
The results show that the phase delay of light propagating in the fiber is relative to the thickness of the film, and the conclusions of the two models are corresponded.
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