CKD Elektrotechnika (Czechia)

In this paper, ration of Weibull random variable and α - μ random variable is considered. This ratio can be used for evaluation performances wireless communication system operating in Weibull multipath fading channel and the α - μ channel interference is presented. In this paper, probability density function of ratio Weibull random variable and α - μ random variable, cumulative distribution function of ratio Weibull random variable and α - μ random variable and moments of ratio Weibull random variable and α - μ random variable are calculated.

The paper presents possibilities of compensation of general single-phase load connected to the three-phase grid. The compensation is to ensure a symmetrical and pure active load of the three-phase grid. It is documented that after the proposed compensation it is possible to draw symmetrical and pure active current from all phases. A set of multi-level voltage converters is considered as a compensation device. The paper presents a way of determining the reference currents for the converter in its two branches and proposes a method of controlling the converter so that the active power from the grid is equal to the active load of the load. This methodology is documented by the results of a series of simulations for static and dynamic modes of the system.

In this article we tried to introduce our renewed technology regarding the Gerincor project. Instead of the old technology the new provides much cleaner, more accurate, and more comfortable procedure for our young patients. Moreover data could be archived much easier.

A new closed-form expression for the coupling matrix elements in the multimode equivalent network that describes plane wave scattering from a planar periodic single-strip grating at a dielectric interface is presented. After solving a Fredholm integral equation of the first kind whose kernel has a logarithmic singularity, the coupling matrix elements are obtained in the form of certain ordinary integrals involving the Legendre polynomials, which can be evaluated analytically.

Der Gegenstand der vorliegenden Arbeit ist die Untersuchung der Magnetisierung des Eisens und des Magnetits in schwachen Feldern bei verschiedenen Temperaturen. Hierbei wurde insofern systematischer verfahren wie bei fruheren Arbeiten anderer Beobachter, als die Temperaturabhangigkeit fur die beiden Koeffizienten ap und bp in der linearen Formel der Permeabilitatμ=ap + bp H ermittelt wurde.