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Hubs play important roles in scale-free networks. Existing hub search algorithms mostly assume the availability of the global network structure and use a variety of centrality metrics to search the hubs in the network. However, when it is very difficult to obtain the network topology in large-scale networks, how we can search the hubs? In this paper, a hub search method based on sampling with biased...
Post-implant dosimetric evaluation is a key procedure of brachytherapy. The way of traditional manual localizing seed is lack of efficiency. Therefore, Automatic seed detection method is needed to efficiently and accurately calculate the centroid and orientation. There are some shape differences among seeds, caused by imaging features. Single seed may be presented on more than one slice and seeds...
A new algorithm is suggested in this paper to solve discrete Lyapunov matrix equations. First, we design the algorithm to solve the matrix equations, of which coefficient matrices are of Frobenius form. Then, we extend this method successfully to general discrete Lyapunov matrix equations by similarity transforming their coefficient matrices. Finally, numerical results show that the new algorithm...
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