We describe a content based speech discrimination algorithm in broadcast news based on the time-varying information provided by the modulation spectrum. Due to the varying degrees of redundancy and discriminative power of the acoustic and modulation frequency subspaces, we first employ a generalization of SVD to tensors (Higher Order SVD) to reduce dimensions. We further select the optimal prin...

With the rapid development of social networks and high-quality video sharing services, demand for delivering large quantity high quality contents under stringent end-to-end delay requirement is increasing. To meet this demand, we study content caching problem modelled as a Markov decision process in network edge server when popularity profiles are unknown time-varying. In order to adapt changin...

In contrast to the time-domain waveform, time-frequency representations explicitly represent the time-varying frequency content of a sound and effectively visualize the signal’s activity at any timefrequency bin. These transforms are often complex-valued and include well known tools such as the short-time Fourier transform, constant-Q transforms, wavelets, etc. However, because our hearing syst...

We develop an adaptive control architecture to achieve stabilization and command following of uncertain dynamical systems with improved transient performance. Our framework consists of a new reference system and an adaptive controller. The proposed reference system captures a desired closed-loop dynamical system behavior modified by a mismatch term representing the high-frequency content betwee...

The frequencies of time-varying mass systems have not been commonly studied in engineering structures as the rate change is generally small compared to overall structure. For silos granular materials, total stored granules can be relatively high silo During flow-in or flow-out granules, system behaves a system. Minor changes moisture content ratio cause their flow characteristics change. influe...