In the presented paper a new approach to the problem of noise reduction of gray and colour images has been presented. The new method is based on the concept of a virtual particle performing a random walk on the image lattice, with transition probabilities defined by the median distribution. The major advantage of this algorithm, is that it filters the image, while preserving the image structure...

The standard linear technique of impulse response function analysis is extended to the nonlinear case by de"ning a generalized impulse response function. Measures of persistence and asymmetry in response are constructed for a wide class of time series. ( 2000 Elsevier Science B.V. All rights reserved. JEL classixcation: C22; C51; C52; E32

Tasks: 1. To measure the impulse counting rate as a function of the distance between the source and the counter tube. 2. To determine the half-value thickness d1/2 and the absorption coefficient of a number of materials by measuring the impulse countAttenuation coefficient of different materials as a function of the material density (from left to right: Plexiglas®, concrete, aluminium, iron, le...

Nonlinear control systems presented as differential inclusions with positional impulse controls are investigated. By such a we mean some abstract operator the Dirac function concentrated at each time. Such ("running impulse"), generalized function, has no meaning and is formalized sequence of correcting actions on system corresponding to directed set partitions interval. The responds by discont...

the evaluation and control of the trains induced vibrations needs even more attention in the case of underground tracks which passes near to monuments and historical sites. the rail corrugations which occur due to the wheels’ impulse loads during the operation period of underground railway tracks, usually amplify the ground borne noise and vibration. in the current study, the mentioned phenomen...

At self-selected walking speeds, elderly compared with young adults generate decreased joint torques and powers in the lower extremity. These differences may be actual gait-limiting factors and neuromuscular adaptations with age or simply a consciously selected motor pattern to produce a slower gait. The purpose of the study was to compare joint torques and powers of young and elderly adults wa...

The paper introduces a functional time series (lagged) regression model. The impulse response coefficients in such a model are operators acting on a separable Hilbert space, which is the function space L2 in applications. A spectral approach to the estimation of these coefficients is proposed and asymptotically justified under a general nonparametric condition on the temporal dependence of the ...

Device-Free localization is a promising technique for indoor positioning in infrastructures, as it eliminates the reliance on custom and costly hardware. In this study, we present development of compact cost-effective bistatic radar sensor that utilizes DW3000 UWB transceivers. The effectiveness was evaluated through comprehensive assessments various channels, with particular emphasis channel 9...

A theory of earthquake input energy to building structures under single impulse is useful for disclosing the property of energy transfer function. This property shows that the area of the energy transfer function is constant irrespective of natural period and damping of building structures. However, single impulse may be unrealistic from a certain viewpoint because the frequency characteristic ...

This paper discusses the methodology for selecting a set of relevant nonstationary features to increase the specificity of the obstructive sleep apnea detector. Dynamic features are extracted from time-evolving spectral representation of photoplethysmography envelope recordings. In this regard, a time-evolving version of the standard linear multivariate decomposition is discussed to perform sto...