This paper analyzes the non-classical shock waves which arise as limits of certain di usive-dispersive approximations to hyperbolic conservation laws. Such shocks occur for non-convex uxes and connect regions of di erent convexity. They have negative entropy dissipation for a single convex entropy function, but not all convex entropies, and do not obey the classical Oleinik entropy criterion. W...

The effect of periodic vibration noise in wellsite is an important factor which impact analysis on three-dimensional drill string vibration signal. In order to obtain more accurate characters of three-dimensional drill string vibration signal that reflects the drilling tools condition, we conduct researches on the periodic vibration noise in the wellsite, independent component analysis algorith...

This paper presents new blind separation methods for Moving Average (MA) convolutive mixtures of independent MA processes. They consist of time-domain extensions of the FastICA algorithms developed by Hyvärinen and Oja for instantaneous mixtures. They perform a convolutive sphering in order to use parameter-free fast fixed-point algorithms associated with kurtotic or negentropic nongaussianity ...

We investigate prompt convection in core collapse supernovae and its consequences for the late-time shock evolution and supernova outcome. We examine the evolution of the core prior to the onset of convection and nd that the negative entropy gradients imprinted on the outer core by the weakening shock, which, along with the negative lepton gradient, drive the convection, are very sensitive to (...

This paper presents a formal axiomatic semantics for the essential model notations of Syntropy, where an essential model provides a step towards the speci cation of an object-oriented system. Syntropy like other objectoriented development methods uses intuitive and easy to understand graphical notations for expressing the static and dynamic aspects of the model. However, Syntropy di ers from ot...

We introduce a parametric nonlinear transformation that is well-suited for Gaussianizing data from natural images. The data are linearly transformed, and each component is then normalized by a pooled activity measure, computed by exponentiating a weighted sum of rectified and exponentiated components and a constant. We optimize the parameters of the full transformation (linear transform, expone...

A thermodynamic model of a compartment fire with one state variable (corresponding to the dimensionless temperature of the smoke layer) based on energy conservation is studied from the point of view of the Second Law (exergy analysis). To define the exergy rate of the process, a novel concept of mean thermodynamic temperature is introduced for the smoke layer. This parameter is the equivalent o...