The coherent interband dynamics of optically excited two-dimensional lateral surface superlattices driven by an in-plane static electric field has been investigated. The linear absorption, the spectrally-resolved pump-probe fourwave mixing signals and spatial coherent wavepacket evolution in the timedomain are obtained. When the rational condition Ex/Ey = p/q, with p, q prime to each other, is ...

ABSTRACT In this paper, we present a 2-stage approach to connected curve grouping. The algorithm is experimented and demonstrated on crack-detected images of paintings. Some features are left undetected and this tends to produce disconnected curves. In order to extract high-level features for content-based application, these supposedly connected curves have to be grouped together. It is one of ...

The Hamming graph H(n,q) is the whose vertices are words of length n over alphabet {0,1,…,q−1}, where two adjacent if they differ in exactly one coordinate. adjacency matrix has n+1 distinct eigenvalues n(q−1)−q⋅i with corresponding eigenspaces Ui(n,q) for 0≤i≤n. In this work we study functions belonging to a direct sum Ui(n,q)⊕Ui+1(n,q)⊕⋯⊕Uj(n,q) 0≤i≤j≤n. We find minimum cardinality support su...