In this paper, we discuss some bicyclic mixed graphs which have few vertices on the bicycles, and find the eigenvectors corresponding to their smallest eigenvalues have similar structure properties to those of uncyclic mixed graphs.

• 对于非奇异双圈混合图，本文对双圈点数较少的若干图进行讨论，发现其最小特征值所对应的特征向量与单圈混合图的情形有类似的结构性质。