Currently one of the promising areas to significantly
improve efficiency of energy saving is the
introduction of renewable sources of energy into the
energy system. In the field of solar energy, we
consider solar photovoltaic power plants with direct
conversion of solar radiation into electricity using
solar panels as the most promising ones. The article
examines the main factors that reveal the prospects
of applying solar photovoltaic power plants. It also
discusses the main advantages and disadvantages in
comparison with traditional and other renewable
energy sources. To improve the operational and
technical characteristics of solar power plants in
their structure significantly, it is proposed to use new
components. Stand-alone inverters for single-phase
transformers with rotating magnetic field will reduce
the number of power electronic devices in the
conversion circuit; they will simplify the system of
control and protection, reduce electromagnetic
interference and improve overall efficiency and
reliability of the converter of the solar power plant.
In addition, the modular design of solar power plants
will also increase the reliability of the power system
due to redundancy of the major functional elements.
It is also important that the construction of solar
power plants in a modular way enhances
maintainability of the system, it significantly reduces
the time for maintenance and troubleshooting in
emergencies; it simplifies the task of changing its
structure depending on requirements of users. The
article reveals peculiarities of work and the main
benefits from the application of solar photovoltaic
power plants
In the article we consider severe conditions of operation of forest cars caused by the difficult land relief and service dirt roads which are badly equipped, as a rule, abounding with roughnesses, obstacles in the form of large superficial roots, stones and boulders, frequent turning movements, steep ascents and descents, considerable cross biases, hollows and boggy sites which lead to increase in consumption of fuel by 1,5-2,0 times and to cutting-down of their life cycle. Ways of increase in their efficiency by equipment by the recuperative mechanisms providing reuse in working process unproductively disseminated to the environment energy, and also promoting increase in reliability and simplification of a design of such cars are analyzed. On the basis of the analysis of the results received when studying a condition of a question, the authors have offered a design of a forest car with a recuperative hydraulic actuator in which gears of recovery are the arrow, a handle and the basic and rotary device of the hydraulic manipulator, reversible hydraulic motors of wheels and a suspender of the forest car. The scheme is submitted and work of a recuperative hydraulic actuator is described. The technique of an assessment of efficiency of the offered design of the forest car with system of recovery of energy is given. The cyclogram of working process of the forest car with the offered hydraulic actuator is constructed
The article presents the development of multi-detail
women’s dress with rectilinear articulation that are
located according to the principle of traditional middle
East ornaments. As the source we have selected
geometric ornaments called girih
Education was always an important part of the
development of the individual and society, because
education is the process of the formation of mind and
character. Each level of education currently requires
increased attention, since the quality of life of future
graduates directly depends on the quality of the
provision of educational services. Despite the fact that
most of the educational process is formalized by
educational standards, regulatory documents and local
acts of educational institutions, this area continues to
need both automation and the development of various
models, methods and techniques, the use of which will
greatly optimize the implementation of the educational
process. There are few software products, models and
methods that assess the quality of education and the
educational process in general, aimed at individual
elements of the educational system. In all the existing,
basically, there is only support for working with
bachelors, slightly less often with masters and very
rarely with graduate students. This article describes
methodological approaches to assessing the
achievements of graduate students, as well as an
information system for supporting the educational
process of graduate school
The aim of the research was to develop a geographical
information system (GIS) for monitoring soil fertility
based on calibrated remote sensing data within Rostov
region. The possibility of developing a geoinformation
system for irrigated agrolandscapes monitoring based
on modern computer geoinformation technologies for
problems solving of reclaimed territories management
in cooperation with other automated information
technologies is considered. An example of selecting
main degradation processes for the irrigated
agrolandscape within Rostov region boundaries, the
main possibilities of the system and the proposed
directions for its development are presented. To
develop a geoinformation monitoring system, the
ArcGIS 10.4.1 for Desktop software package has been
selected. Monitoring GIS includes remote sensing data
obtained from the VEGA-Science satellite monitoring
service. The technology for creating a geodatabase for
degradation processes monitoring, necessary for rapid
analysis of information and time-saving on collection,
processing and calibration of data bulk is introduced.
As a mapping principle, graduation of farm fields by
intensity of land degradation processes was used. GIS
monitoring includes multi-layer digital maps and data
attribute tables characterizing the main indicators of
soil fertility and crop seeding development. The use of
GIS technologies with satellite data will significantly
reduce the complexity of field survey data processing
by data processing automation and is promising for
developing computer monitoring systems for irrigated
agro landscapes. Farm specialists are offered a
convenient mechanism not only for data accumulation,
but also for maintaining fields’ history with reference
to the yield year. Analysis tools allow performing data
spatial and logical queries, to run samples and reports
Assessment of barley for the blotch incidence is traditionally carried out by visual determination of leaf damage with the help of the available expert – phytopathologist , and with the account scales which allows to characterize a variety for resistance or susceptibility to the studied disease in field conditions. This method has a number of disadvantages that are proposed to be overcome by developing a new tool of a phytopathologist. The measuring tool of a phytopathologist should provide high accuracy of the assessment of plants damage caused by the disease, and the measurement procedure should be quick and easy. The aim of this work is to develop a mobile tool of a phytopathologist for quantitative fast assessment of winter barley leaves damage caused by blotch in field conditions. To achieve this goal the following tasks should be fulfilled. Objective 1: introduce the idea and concept of problem solution; Objective 2: justify the choice of method and solution tool; Objective 3: apply the selected method and tool to solve problems, i.e. to perform the following steps: – cognitive structuring of the subject area; – formalization of the subject area; – synthesis and verification of models; – improvement of the quality of the model and choice of the most reliable model – solving diagnostics problems within the most reliable model (classification, recognition, identification), decision support and research of the simulated subject area by studying its model. Objective 4: describe the effectiveness of the proposed solution. Objective 5: examine the limitations and disadvantages of the proposed solutions of the problem and prospects of its development by overcoming those limitations and disadvantages. The article provides a detailed numerical example of the solution of tasks on real data processed with the ASC- analysis and "Eidos" system
The article considers a solution for an
economy prognosis formation task in
different industries and service sector. In
addition, it contains a review of
mechanism of an intersectoral balance and
theoretical components of V.V. Leontief
linear economic model of intersectoral
balance. Premises of mathematiceconomical
apparatus usage and practical
usage in economy planning of many world
countries and also results of this apparatus
working making that countries’ economic
condition “almost balanced” are studied.
Inferences of “Input–Output” method
significance in economy planning for
company groups and country in general are
made in this article too.
Solution of program product for
calculations and analysis development
necessity is substantiated. In this program,
output of reports is envisaged. Practical
example of intersectoral balance task with
the developed program is given in article
and accuracy of calculations is approved.
Program product structure and
development tools are described. The
program can be used as a tutorial for
students studying on economical directions
for economic indicators calculation
experience gaining
The article offers a method of details finishing and cleanup processing based on the details and working environment granules mass hashing in combination with the target transporting movement from loading to unloading. Such combination is provided by means of technological process in which the movements are carried out at the expense of the working body executed in the form of a complex screw rotor with the multidirectional screw surfaces formed by flat elements. Four screw rotors designs and methods of their assembly as well as the recommendation on the use of screw rotors are shown: "The movement of the processed details and particles of a working environment is the most complex and infinitely various among the I class screw rotors and the most elementary and uniform among the IV class screw rotors". The practice and experimental control of the details finishing technological process introduction efficiency in screw rotors have shown that for the considered case productivity of, for example, agnail removal increases tens of times. It is reached not only at the expense of the possibility of continuous processing provision in screw rotors, but also due to significant increase in amplitudes of low-frequency fluctuations which are reported to loading masses by the screw rotors machines located at different angles to each other and to screw rotor rotation axis
In the article there are results of theoretical and experimental
researches on creating a working part for leafsplitting
and orientation of tobacco leaves when preparing
for their drying
Long-term storage of fruits can be achieved by means
of decreasing microbial contamination of their surface
as a result of fruits pre-treatment by biopreparations
before dispatching for storage. In the current study
patterns of influence of fruits pre-treatment with the
“Ekstrasol” biopreparation in a number of
concentrations of bioagent on the microbial
contamination of their surface during storage are
revealed. The “Ekstrasol” preparation is a biofungicide,
containing the Ch-13 strain of Bacillus subtilis bacteria
and their metabolites. As research objects there were
chosen apples of a zoned in the Krasnodar region
variety called Idared and pears of a zoned in the
Krasnodar region variety called Conference, harvested
in 2016. The apples and the pears were stored over a
period of 6 months in the low temperature conditions.
Samples were withdrawn every month over the period
of storing. The species composition and quantity of the
most prevalent microorganisms, potentially causing the
spoilage of apples and pears during storing, were
identified. The optimal concentration of the bioagent,
which provides the maximal decreasing of microbial
contamination of fruits’ (apples and pears) surface, is
established – 106
CFU/g, dosage of solution – 1 ml per 100 g of fruit