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Ignition of spray flame with multiple spark
(2009-05-25)
The movies have been taken at 4000 fps. The spark is placed at a distance z from the nozzle and at 5mm from the enclosure. The ignition unit delivers at 100Hz a spark lasting 8ms, followed by 2ms of no activity. The front ...
Flame in methane jet after spark ignition
(2009-05-21)
The video shows the flame motion following spark ignition in a turbulent methane jet. The flow conditions were: 30% air, 70% CH4, jet velocity 12.5m/s & 25m/s, framing rate 4200 fps, spark at r=0, z=40d (40 jet diameters; ...
Autoignition of a H2 jet in hot air flow
(2009-05-21)
The movie (taken with a conventional video camera at 30fps) shows the various operation modes of the Cambridge Autoignition experiment, described in: C.N. Markides, E. Mastorakos,
An experimental study of hydrogen ...
New Evidence on Taxes and Portfolio Choices
(CFAP, Cambridge Judge Business School, University of Cambridge, 2009-05)
Identifying the effect of differential taxation on portfolio allocation requires exogenous variation in marginal tax rates. Marginal tax rates vary with income, but income surely affects portfolio choice directly. In systems ...
Technological roots and structural implications of the double bubble at the turn of the Century
(CFAP, Cambridge Judge Business School, University of Cambridge, 2009-04)
This paper argues that the two boom and bust episodes of the turn of the Century – the Internet mania and crash of 1990s and the easy liquidity boom and bust of 2000s– are two distinct components of a single structural ...
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 ...
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 ...
DOLFIN: Automated Finite Element Computing
(2009)
We describe here a library aimed at automating the solution of partial differential equations using the finite element method. By employing novel techniques for automated code generation, the library combines a high level ...
The Development of a Set of Principles for Through-Life Management of Engineering Information
(Engineering Design Centre, Department of Engineering, University of Cambridge, 2009-10-26)
Corporate business models are shifting away from product delivery paradigms to product-service paradigms, where ongoing through-life service support is preeminent. In the UK, a Grand Challenge project (www.kimproject.org) ...
Analysis of an interface stabilised finite element method: The advection-diffusion-reaction equation
(2009-10-29)
Analysis of an interface stabilised finite element method for the scalar advection-diffusion-reaction equation is presented. The method inherits attractive properties of both continuous and discontinuous Galerkin methods, ...