HMM based speech synthesis, where speech parameters are generated directly from HMM models, is a new technique relative to other speech synthesis techniques. In this paper, we propose some modifications to the basic system to improve its quality. We apply a multi-band excitation model. And we use samples extracted from the spectral envelop as spectral parameters. In the synthesis, the voiced an...

Crowd jumping loads are often simplified to a single-point excitation in the existing Fourier series-based models, most of which lack data support crowd experiments. A multi-point model for is herein developed, where two parameters, frequency, and time lag shift, selected quantify synchronization. After verification 3D motion capture technology, probability distributions frequency shift modeled...

Guided wave ultrasonic testing has been widely used for nondestructive and long-range evaluation of diverse mechanical structures, such as pipes plates. In general, a large number guided modes exist even in the simplest geometries, they exhibit highly dispersive characteristics. Thus, sophisticated excitation methods elaborate modal analyses need to be implemented excite, acquire, process well-...

This study proposes a multi-frequency response piecewise-linear piezoelectric vibration energy harvester (MFRPLP-VEH) by combining the linear resonance and nonlinear bandwidth broadening methods to improve working frequency environmental robustness of harvester. A theoretical model is established based on electromechanical coupling dynamic MFRPLP-VEH. The harvesting performance width efficiency...

Introduction RF shimming is a well-known technique, where amplitudes and phases of a transmit RF coil array are optimized to obtain a homogeneous B1 profile, i.e., to compensate wave propagation effects at main fields of 3T or above (see, e.g., [1]). Among other anatomies, legs are particularly prone to wave propagation effects due to their bi-cylindrical geometry, resulting in significant sign...

This paper mainly studied the analytical solutions of three types Van der Pol-Duffing equations. For a system with parametric excitation frequency, we knew that ordinary homotopy analysis method would be unable to find solution. Thus, primarily used multi-frequency (MFHAM). First, MFHAM was introduced, and solution expressed by constructing auxiliary linear operators. Then, applied specific sys...

In this work, we analyze the creation of discharge asymmetry and concomitant formation DC self-bias voltage in capacitively coupled radio frequency plasmas driven by multi-frequency waveforms as a function electrode surface characteristics. For latter, consider vary coefficients that characterize elastic reflection electrons from surfaces ion-induced secondary electron yield. Our investigations...

this paper presents a full duplex, real time implementation of itu-t g.723.1 [7,8] speech coder using the tms320c5402 dsp chip which is based on a 16 bit fixed-point architecture. an optimization method is proposed in order to reduce the total necessary cycle time consumed in real-time implementation. the multi-pulse maximum likelihood quantization (mp-mlq) excitation search block which is the ...

To preserve shape-invariance when pitch or time-scale modifying sinusoidally modelled voiced speech, the phases of the sinusoids used to model the glottal excitation are made to add coherently at estimated excitation points. Previous methods achieve this by estimating excitation phases at synthesis frame boundaries, disregarding the frequency modulation that may occur between the frame boundary...