Likelihood and Duration of Flow Breakdown

the relationship between using language learning strategies, learners’ optimism, educational status, duration of learning and demotivation

with the growth of more humanistic approaches towards teaching foreign languages, more emphasis has been put on learners’ feelings, emotions and individual differences. one of the issues in teaching and learning english as a foreign language is demotivation. the purpose of this study was to investigate the relationship between the components of language learning strategies, optimism, duration o...

Breakdown Points for Maximum Likelihood Estimators of Location–scale Mixtures

ML-estimation based on mixtures of Normal distributions is a widely used tool for cluster analysis. However, a single outlier can make the parameter estimation of at least one of the mixture components break down. Among others, the estimation of mixtures of t-distributions by McLachlan and Peel [Finite Mixture Models (2000) Wiley, New York] and the addition of a further mixture component accoun...

Duration refinement by jointly optimizing state and longer unit likelihood

We refine the duration model in HMM-based TTS by extending the work of Wu [1]. The model is refined by jointly maximizing the duration likelihoods of state, phone and syllable units. Both Gaussian and gamma distributions are employed. In synthesis, the state durations are generated by the same joint optimization procedure. By considering the duration of state and longer units jointly, the accum...

Mixing in a vortex breakdown flow

Streak breakdown instability in pipe Poiseuille flow

This work is devoted to the study of the stability of Hagen–Poiseuille flow or pipe flow. The analysis is focused on the streak breakdown process by which two-dimensional streamwise-independent finite amplitude perturbations transiently modulate the basic flow leading to a profile that contains saddle points and is linearly unstable with respect to very small streamwise-dependent perturbations....