1,721,035 research outputs found
A study on vowel behavior and its description by a statistical model
No full textA complete statistical model for Italian vowels is presented. The classification method uses the adaptive procedure, which makes possible the evolution of the regions characteristic of each vowel in the F1-F2 plane. Each part of the algorithm is described in its theoretical detail and justified on the basis of extended experimentation. Results are given proving the accuracy of the classifier for vowel segments independent of the context and prosody and dependent upon the context and prosody
A Bayesian-adaptive decision method for the V/U/S classification of segments of a speech signal
No full textApproximate output tracking for nonlinear non-minimum phase systems with an application to flight control
No full textAn unstable zero-dynamics is a known obstruction to inducing exact asymptotic tracking for an open set of output trajectories with internal stability. This paper proposes a procedure for achieving approximate tracking for a nonlinear system whose linearization possesses real right-half plane zeros. The method is guaranteed to remove the right-half plane zeros while the other zeros remain in their previous location; moreover, it provides information on the class of signals for which good approximate tracking can be obtained. With other methods, the right-half plane zeros are eliminated but the final location of the remaining zeros is not known a priori. The design procedure is illustrated on a trajectory control problem of an aircraft in rapid manoeuvres. Simulations illustrate the computations involved and show that precise lateral and longitudinal manoeuvres can be performed, even in the presence of uncertainties
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