The task of optimal representation of text documents at the final stage of operation of an information retrieval system represented as the integer, combinatory task about assigning to the ranked place in the total list – each of the retrieved documents. To solve the task it is offered with usage of algorithm Kuhn in structure of automatic search servers.
The article is devoted to the decision of an actual problem of automation of the management process of construction site environment monitoring.
The article recommended to use an environmental monitoring automated information system of construction site for quality management of ecological condition during the construction process and timely control of the maximum permissible emissions.
The main stages and methods of designing software applications are described
We have proposed a cutting segment for commercially available feeders; we have also presented the design scheme of the cutting edges and the angle of segment installation on a working body
We have performed a mechanical activation of TiNi
powder; as a result, PN47T26TS27 powder after
mechanical activation is flat discs ranging in size
from 10 to 30 microns. We have developed a
composition technology "steel - material with shape
memory effect" by high-velocity oxygen-fuel
spraying of mechanically activated powder based on
TiNi. We have determined the optimal processing
parameters to ensure a nanostructured surface layer.
We have estimated the process parameters of highvelocity
oxygen-fuel spraying. The basic parameters
are: propane flow rate 60-85 l / min, that of oxygen
120-160 l / min, flow rate of powder and carrier gas
(argon), distance and angle of deposition, and
movement speed of the torch, the rotation speed of
the coated workpieces. We have carried out macroand
microanalysis of surface layers of Ti-Ni based
alloy, obtained on proven technology. We have
studied the effect of TiNi doping with a third
component Zr. The simulation allows us to predict
the possibility of using surface modification of
products with SME material TiNiZr under certain
conditions of temperature and to determine the
desired composition of the coating, which provides a
positive effect. We have made tests on steel 45 with
a surface-modified layer TiNiZr under dry friction
conditions, during which there is a significant
increase in temperature, we have confirmed the
effect of improving the wear resistance
The article describes the performance analysis of disc harrows and harrows. The basic types and their purpose have been presented. Particular attention is paid to the peculiarities of optimization of geometrical and operational parameters of spherical disks, depending on soil conditions
The questions of energy and fuel saving as well as the problem of their substitute with renewable sources are in the focus of the scientists all over the world. At present, the most actual task is the efficient use of fuel wood, especially low-grade invaluable wood and wood wastes. The article considers the regional characteristics and opportunities for wood biomass harvesting in the Voronezh region
The article is devoted to increasing beekeeping’s earning capacity with rigging and automation of technological processes. Winter is the most complicated and critical period in beekeeping. It influences on further productivity of bee colony. Winter period has specificity – bees are gathering in winter cluster and sustaining temperature in 24…32 °С range inside. This temperature is depending on fluctuation of outside air temperature. For passing winter without complication electric heating is used. Cluster geometry in winter is changing constantly and for optimal regime of electric heating we need to take it into account. Additionally, bees’ activity changing beehive’s microclimate and it’s important to know when beehive’s microclimate adaptive control system is developed. Conducted researches allow us to get basic equations which characterizes microclimate with taking into account of winter cluster’s variable geometry. The equations establish linkage basic parameters of beehive, winter cluster, internal air between outdoor air. Simulation results may be used for adaptive heating control system programming. Additionally, it may be used in special-purpose software for beehive’s microclimate simulation
The results of the research project with the wind tur-bine layout of an optimal aerodynamic configuration of the rotor are given in this article
The article describes the main merits, demerits and peculiarity of choice of electric power generators for wind power plants, as well as ways of stabilization their voltage
WIND CHARACTERISTICS, FEATURES OF THE CALCULATION OF RESOURCES AND ECONOMIC EFFICIENCY OF WIND POWER
The article describes the main characteristics of the wind flow and also discusses the features of wind energy resource calculation and cost-effectiveness of wind power stations