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ML vs. MAP PARAMETER ESTIMATION OF LINEAR DYNAMIC SYSTEMS FOR ACOUSTIC-TO-ARTICULATORY INVERSION: A COMPARATIVE STUDY
Özbek Arslan, Işıl; Demirekler, Mübeccel (2010-08-27)
This work proposes a maximum a posteriori (MAP) based parameter learning algorithm for acoustic-to-articulatory inversion. Inversion method is based on single global linear dynamic system (GLDS) representation of acoustic ...
Energy preserving methods for lattice equations
Erdem, Özge; Karasözen, Bülent (2010-11-27)
Integral preserving methods, like the averaged vector field, discrete gradient and trapezoidal methods are to Poisson systems. Numerical experiments on the Volterra equations and integrable discretization of the nonlinear ...
External Search Coil as a Means of Measuring Rotor Speed of an Induction Motor
Özlü Ertan, Hatice Gülçin; Keysan, Ozan (2009-07-03)
The study in this paper investigates whether the air gap harmonics can be identified by using an external search coil placed on the frame of an induction motor. For this purpose the study focuses on the prediction of rotor...
Formant Trajectories for Acoustic-to-Articulatory Inversion
Özbek Arslan, Işıl; Hasegawa-Johnson, Mark; Demirekler, Mübeccel (2009-09-10)
This work examines the utility of formant frequencies and their energies in acoustic-to-articulatory inversion. For this purpose, formant frequencies and formant spectral amplitudes are automatically estimated from audio, ...
Choice of Pole Number of Two-Rotor Axial-Flux PM Motor for Control Moment Gyroscope
Özlü Ertan, Hatice Gülçin; Yilmaz, K. (2011-09-10)
Modern low earth orbit satellites use control moment gyroscopes (CMG) for maneuvering. GMC's generally use a brushless DC motor to run an inertial wheel at about 10000 rpm. In this paper axial-flux BLDC motor is considered...
Computation of Spectra of Large Networks
Erdem, Özge; Karasözen, Bülent; Sariaydin, A. (2010-11-27)
Many interacting complex systems in biology, physics, technology and social systems can be represented in a form of large networks. The networks are mathematically represented by graphs. A graph is usually represented by a...
Prediction of motor speed for low cost induction motor drives
Özlü Ertan, Hatice Gülçin; Ozyurt, Caglar (2006-05-19)
In this paper speed estimation methods for low cost, variable frequency induction motor drives are investigated. Such methods are required to minimize the computational effort and show little parameter dependence. Existing...
Tracking of Visible Vocal Tract Resonances (VVTR) Based on Kalman Filtering
Özbek Arslan, Işıl; Demirekler, Mübeccel (2006-01-01)
This paper analyzes vocal tract resonance (VTR) frequency trajectories and their relationship to formants from a new point of view. Considering abrupt/continuous changes in the physical geometry of vocal tract, VTR may cha...
Should Education be in English-Medium? Friend or Foe?
Çağatay, Sibel (2018-07-21)
An Analytical Approach for the Calculation of Flux-Linkage Including End-Effect for SR Motors
Özlü Ertan, Hatice Gülçin; Yalciner, Levent B. (2008-06-13)