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Direct numerical simulations of spray spark ignition
(Engineering Department, 2010-09-09)
Direct Numerical Simulations (DNS) of a mono-disperse spray in a turbulent flow have been used to explore the nature of flame kernels when a spark is deposited in the spray. The simulations use complicated chemistry and ...
Two-pass decision tree construction for unsupervised adaptation of HMM-based synthesis models
(2009)
Hidden Markov model (HMM) -based speech synthesis systems possess several advantages over concatenative synthesis systems. One such advantage is the relative ease with which HMM-based systems are adapted to speakers not ...
Unsupervised cross-lingual speaker adaptation for HMM-based speech synthesis using two-pass decision tree construction
(Proceedings of the IEEE International Conference on Acoustics, Speech and Signal ProcessingProceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing, 2010)
This paper demonstrates how unsupervised cross-lingual adaptation of HMM-based speech synthesis models may be performed without explicit knowledge of the adaptation data
language. A two-pass decision tree construction ...
Autoignition of droplets in hot air flow
(2010-09-09)
A single-droplet generator has been used to inject fuel droplets of various sizes and chemical composition into a hot turbulent air flow. The ensuing autoignition and flame behaviour has been recorded with a fast camera. ...
Autoregressive clustering for HMM speech synthesis
(ISCA (International Speech Communication Association)Proceedings of the 11th Annual Conference of the International Speech CommunicationProceedings of the 11th Annual Conference of the International Speech Communication, 2011)
The autoregressive HMM has been shown to provide efficient parameter estimation and high-quality synthesis, but in previous experiments decision trees derived from a non-autoregressive system were used.
In this paper we ...
Autoregressive HMMs for speech synthesis
(ISCA (International Speech Communication Association), 2009)
We propose the autoregressive HMM for speech synthesis. We show that the autoregressive HMM supports efficient EM parameter estimation and that we can use established effective synthesis techniques such as synthesis ...
Analysis of delamination growth with discontinuous solid-like shell elements
(International Journal of Numerical Methods in Heat and Fluid FlowInternational Journal of Numerical Methods in Heat and Fluid Flow, 2004)
Delamination is one of the most important failure mechanisms in laminates. Normally, it is modelled using interface elements. These elements are placed between two layers that are modelled with continuum elements. The ...
Strong embedded discontinuities for simulating fracture in quasi-brittle materials
(Fracture Mechanics of Concrete StructuresFracture Mechanics of Concrete Structures, 2001)
In this paper embedded strong discontinuities are used to model discrete cracking in materials like concrete. In the approach followed a discontinuous displacement field is considered and the deformation is localized at a ...
Time scale in concrete fracture: a model based on partitions of unity
(Proceedings of the 4th International Conference on Fracture Mechanics of Concrete Structures (FRAMCOS4)Proceedings of the 4th International Conference on Fracture Mechanics of Concrete Structures (FRAMCOS4), 2001)
Intense research efforts have been put in the formulation of theories for crack initiation and propagation in concrete. Yet, little attention has been paid to the time-dependence of fracture, despite evidence of its ...
A p-adaptive scheme for overcoming volumetric locking during isochoric plastic deformation
(Solids, Structures and Coupled Problems in Engineering : ECCM-2001: 2nd European Conference on Computational MechanicsSolids, Structures and Coupled Problems in Engineering : ECCM-2001: 2nd European Conference on Computational Mechanics, 2001)
A p-adaptive scheme is developed in order to overcome volumetric locking in low order finite elements. A special adaptive scheme is used which is based on the partition of unity concept. This allows higher order polynomial ...