super-λ和限制性边连通度是两个比边连通度更能刻画网络可行性的参数。本文证明了无向无向de-Bruijn图UB（d,n)是super-λ（d≥2,n≥2)。对n≥4，我们证明了UB（2,n)的限制性边连通度为4；UB（2，3）的限制性边连通度是3。对d≥3我们指出UB(d,n)(n≥3)的限制性连连通度λ’，满足2d-2λ’≤4d-4.

Super-λ and restrcted connectivity are more refined network reliability indexes than edge-connectivity. In this work, we proved: (1) UB(d,n) is super-λ (d ≥ 2, n ≥ 2); (2) The restrcted connectivity of UB (2,n) is 4 for n ≥4, and it is 3 for UB (2,3). When d ≥ 3, 2d-2 < λ' (UB(d,n)) ≤ 4d-4.