In this paper, the reduction method of number of parameters in the segmental-feature HMM (SFHMM) can be considered. It is reported that the SFHMM shows better results than conventional HMM in the previous studies. However, its number of parameters is greater than that of HMM. Therefore, there is a need for new approach that reduces the number of parameters. The trajectories are used for the aco...

Threshold models of global cascades have been extensively used to model real-world collective behavior, such as the contagious spread of fads and the adoption of new technologies. A common property of those cascade models is that a vanishingly small seed fraction can spread to a finite fraction of an infinitely large network through local infections. In social and economic networks, however, in...