This paper presents the study of the electromagnetic torque harmonic distortion of a slip energy recovery system (SERS), whose converter is constituted by two thyristor bridges and no DC coil. A brief explanation of the circuit configuration will be made. To perform the harmonic study, a special Matlab code program was developed, with several special features. The influence of power electronic ...

Surface conformal maps between genus-0 surfaces play important roles in applied mathematics and engineering, with applications in medical image analysis and computer graphics. Previous work (Gu and Yau in Commun Inf Syst 2(2):121–146, 2002) introduces a variational approach, where global conformal parameterization of genus-0 surfaces was addressed throughminimizing the harmonic energy,with twow...

Surface harmonic map between genus-0 surfaces plays an important role in applied mathematics and engineering, with applications in medical imaging and computer graphics. Previous work [1] introduces a variational approach for computing surface harmonic maps. It obtains global conformal parameterizations of genus-0 surfaces through minimizing the harmonic energy. Two weaknesses of this approach ...

This paper demonstrates the superiority of energy-based features derived from the knowledge of predominant-pitch, for singing voice detection in polyphonic music over commonly used spectral features. However, such energy-based features tend to misclassify loud, pitched instruments. To provide robustness to such accompaniment we exploit the relative instability of the pitch contour of the singin...

‎We consider four-dimensional lie groups equipped with‎ ‎left-invariant Lorentzian Einstein metrics‎, ‎and determine the harmonicity properties ‎of vector fields on these spaces‎. ‎In some cases‎, ‎all these vector fields are critical points for the energy functional ‎restricted to vector fields‎. ‎We also classify vector fields defining harmonic maps‎, ‎and calculate explicitly the energy of t...

In this paper, we study harmonic maps relative to α-connections, but not necessarily standard harmonic maps. A standard harmonic map is defined by the first variation of the energy functional of a map. A harmonic map relative to an α-connection is defined by an equation similar to a first variational equation, though it is not induced by the first variation of the standard energy functional. In...

Accurate speech activity detection is a challenging problem in the car environment where high background noise and high amplitude transient sounds are common. We investigate a number of features that are designed for capturing the harmonic structure of speech. We evaluate separately three important characteristics of these features: 1) discriminative power 2) robustness to greatly varying SNR a...