To limit grid side harmonic and increase power factor of EV charger, A SVPWM based voltage-source rectifier (VSR) control method is presented in this paper. Basing on regular double-close-loopâ€¦ (More)

To extend the compensation ability of unified power quality conditioner (UPQC) and suppress the grid current fluctuation at the time of power regulation, a kind of improved UPQC topological structureâ€¦ (More)

For Unified Power Quality Conditioner (UPQC) adopting traditional hysteresis control method, unstable switching frequency causes great switching loss, and voltage space vector control method leads toâ€¦ (More)

Let A(G) be the adjacency matrix of a graph G with Î»1(G), Î»2(G), . . . , Î»n(G) its eigenvalues in non-increasing order. Call the number Sk(G) := âˆ‘ n i=1 Î» i (G) (k = 0, 1, . . . , n âˆ’ 1) the kthâ€¦ (More)

The trees, respectively unicyclic graphs, on n vertices with the smallest Laplacian permanent are studied. In this paper, by edge-grafting transformations, the n-vertex trees of given bipartitionâ€¦ (More)

Abstract. Let A(G) be the adjacency matrix of a graph G with Î»1(G), Î»2(G), . . . , Î»n(G) its eigenvalues in non-increasing order. Call the number Sk(G) := âˆ‘ n i=1 Î» i (G) (k = 0, 1, . . . , n âˆ’ 1)â€¦ (More)

Let Ln,t be the set of all n-vertex connected graphs with clique number t (2 â‰¤ t â‰¤ n). For nvertex connected graphs with given clique number, lexicographic ordering by spectral moments (S-order) isâ€¦ (More)