In this paper, a digital halftoning method is proposed based on a recently-proposed multiscale error di usion technique for digital halftoning. It can improve the di usion performance by e ectively removing pattern noise and eliminating boundary and `blackhole' e ects. A dot-overlap compensation scheme is also proposed to eliminate the bias in the gray scale of the printed images. EDICS: IP 3.2...

The safe and economic operation of nuclear power plants (NPPs) requires that the behaviour and performance of the fuel can be calculated reliably over its expected lifetime. This requires highly developed codes that treat the nuclear fuel in a general manner and which take into account the large number of in uences on fuel behaviour, e.g. thermal, mechanical, chemical, etc. Although many mature...

This paper studies the rst passage times to at boundaries for a double exponential jump di usion process, which consists of a continuous part driven by a Brownian motion and a jump part with jump sizes having a double exponential distribution. Explicit solutions of the Laplace transforms, of both the distribution of the rst passage times and the joint distribution of the process and its running...

We investigate the empirical performance of high-dimensional a¢ ne stochastic volatility and jump di¤usion (AJD) pricing models to …t S&P 500 stock index option prices.We use these models to study how to structure two kind of risk components: volatility factor and jump di¤usion within a multi-factor framework. We identify that more than two volatility factors are needed to be included into mode...

The redistribution of Be during growth of GaInP layers by gas source molecular beam epitaxy has been studied using secondary ion mass spectrometry for the "rst time. Apparent Be di!usion occurs at doping level over 4]1019 cm~3 at growth temperature of 5003C. At lower temperature the Be di!usion pro"le exhibits a signi"cant increase of Be concentration and reduced di!usion. In contrast to Zn beh...

This paper addresses the issue of reconstructing the unknown eld of absorption and scattering coe cients from time-resolved measurements of di used light in a computationally e cient manner. The intended application is optical tomography, which has generated considerable interest in recent times. The inverse problem is posed in the Bayesian framework. The maximum a posteriori (MAP) estimate is ...

This paper addresses the issue of reconstructing the unknown eld of absorption and scattering coe cients from time-resolved measurements of di used light in a computationally e cient manner. The intended application is optical tomography, which has generated considerable interest in recent times. The inverse problem is posed in the Bayesian framework. The maximum a posteriori (MAP) estimate is ...

Shock wave theory was studied in literature by many authors. This article presents a survey with references about various topics related to shock waves: Hyperbolic conservation laws, Well-posedness theory, Compactness theory, Shock and reaction-di¤usion wave, The CJ and ZND theory, Existence of detonation in Majda’s model, Premixed laminar ‡ame, Multidimensional gas ‡ows, Multidimensional Riema...

Basic relations between the distributions of hitting, occupation, and inverse local times of a one-dimensional di usion process X , rst discussed by Itô-McKean, are reviewed from the perspectives of martingale calculus and excursion theory. These relations, and the technique of conditioning on L y T , the local time of X at level y before a suitable random time T , yield formulae for the joint ...

Di usion Tensor Imaging (DTI) is a relatively new modality for human brain imaging. During the last years, this modality has become widely used in medical studies. Tractography is currently the favorite technique to characterize and analyse the structure of the brain white matter. Only a few studies have been proposed to group data of particular interest. Rather than working on extracted bers o...