Based on this notion, we show that any preferential model, which does not contain any four-node substructure, must be a reduct of some injective model.3.
在此基础上,我们证明了归约定理,即,任意不包含四点子结构的占优模型一定是某个单射模型的归约。
参考来源 - 可公理化单射占优模型类的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
A preferential model based on the expression to better support preferential strategies, especially segmental linear strategies.
设计出了基于表达式的优惠模型，加强对优惠策略的支持，尤其是分段式线性优惠。
Meanwhile, the two countries have differences in taxation structure, preferential taxation policy to foreign investment and levying model, and each has its own characteristics.
同时两国在税制结构、吸引外资税收优惠政策、征管模式等方面存在一些差异，各自也有自身的特色。
Based on that, the preferential flow model was modified.
在此基础上，修正了优先流模型。
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