That can ensure the one to one mapping relationship between the feature set and the image, and avoid the counterfeit attack.
这可以保证特征集与图像之间的一一映射关系，避免伪造攻击。
An almost lower semicontinuity for a set-valued mapping with image space being a topological vector space.
本文对像空间为一般拓扑向量空间的集值映射，给出了所谓几乎下半连续的概念；
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