By self-propagating high-temperature synthesis (SHTS) prepared fine powder оf La2-xSrxNiO4 composition , which is used to obtain dense ceramics exhibiting the properties of n-type semiconductor. Prolonged annealing of the samples resulted in a decrease of the conductivity on the order of 3-4, and the changing nature of the dielectric spectrum: dielectric constant ε' has a stable value of 4·104 Hz in the range of 0,4 − 1·105 Hz .

Keywords: dielectric constant, phase separation, nikelate of strontium lanthanum, self-extending high-temperature synthesis

We consider the improved design of the centrifugal oil filter with constant control of its cleaning power, allowing to change the technology system maintenance lubrication systems by separating operations replace crankcase oil filter and clean the rotor.

Keywords: centrifugal oil filter, technology maintenance, lubrication system

The simulation of the process of the electrically active impurities relocation in the electric field of Schottky diode space charge region has been made. The analysis of the simulation results shows the possibility of controlled alloying impurities relocation on the depth about tens of nanometers caused by electrically active atoms diffusion in the electric field of Schottky diode space charge region.

Keywords: diffusion, space charge region, Schottky diode

  The work in the Internet is impossible without the use of search systems. The quality of the responses to user’s requests to a large extent depends on the keywords. However, due to some circumstances the user is not able to accurately enough to formulate a request and the number of received responses is great. In these situations, additional feature relevant answers selection can be text documents belonging to a particular implicit group. Implicitness group is shown in the fact that the text belongs to it is determined not by direct comparison with the reference (key) words, but by matching the semantic features, the wording of which is absent in the search text. Implementation of text classification can be made on the basis of the frequency characteristics of N-grams. The purpose of the work is to assess the possibility of using the frequency characteristics of N-gram of the websites text fragments to improve search engine based on a study of their information content. In this work designed a method based on the selection of informative indicators of N-gram with low computational requirements and with application of the correlation analysis. Based on its application has been shown that the frequency characteristics of N-grams have sufficient information content to improve search engines. The developed method has many common with systems of writing, because it relies not only on the alphabetic systems.  

Keywords: N-gram, request, semantic features, search engine

Consideration of the formation method of choice underlying architecture of reconfigurable computing system minimal cost, providing the requirements for the probability of the task. The main mathematical tool used in the theory of decision making under uncertainty, as well as methods for game-theoretic optimization.

Keywords: reconfigurable computing system, Markov processes, game-theoretic optimization, basic architecture, the uncertainties

Information about authors of issue №2 (2010)

Keywords: authors

Information about authors of issue №2 (2008)

Keywords: authors