Nowadays the method of finite elements (MFE) is a
standard method of acoustic analysis. It consists in
finding the solution of the function on the maximum
allowable quantity of piecewise continuous functions
that are determined in allowed number of subdomains.
The number of sub-domains has a finite
value but an unknown continuous value is
approximated by the polynomial on each element that
acquires specific values in the nodes. Polynomials can
be various but all of them produce continuity of total
value along its limits. Herewith because of technical
features of the calculation process minimization of
numbers of polynomials is required according to the
criterion of acceptable precision. In the chosen
COMSOL Multiphysics program model the range of
frequencies under analysis is the result of the sum of
10 segments (sub-ranges). Such a sub-range is a
minimal discrete value in certain conditions of
calculation. Thus, the calculated value on this subrange
can be considered as the result of calculation by
means of using the band-pass filter with 35 Hz
bandwidth. Because of this, we can draw a conclusion
about changing the state change of the noise exposure
on the combine operator with respect to the previous
measurement according to the regulatory
methodology. Hereinafter if the stated change of the
noise exposure is found, measurements that are more
precise are taken. On the basis of these measurements
the head of the company receives recommendations
either on verification of stated acoustic characteristics
of devices and mechanisms of a harvester or on
verification of acoustic ways of transmission of
structural noise (noise created by devices that
penetrates into the booth through the combine body),
or on verification of noise isolation of the booth
The article shows the necessity to consider the inter-control result to forecast the automobile state and present it as a random value. It is pointed out, that the character of the automobile element parameter change is determined by the determined function and the criteria of this or that function choice. It is stated, that the variation coefficient serves as a criteria of approximation. Besides, the element resource variation coefficient is obviously more informative as it results calculations at the whole range of parameter change with consideration of this change character when the coefficient of the parameter change variation can reflect the approximation degree only on one or several sections. It is underlined that in a case of the parameter change functions approximation it is necessary to consider the automobile details break-in when one can see the short and sharp increase of the parameter change. Moreover, we have made a conclusion that the forecast error and intensity depend finally on the choice of the approximating function. The wrong choice of the function can bring to naught all the efforts to direct the safety margin and other parameters of the automobile elements. We have found out that the power function of thee parameter change is quite unique. This function coefficients having distinct physical sense are few. This shows the convenience of the wide use of the degree function for practical forecast. The approximation error of parameter change might be influenced (along with a selection of the function) by the accuracy of determining its coefficients. Finally, we have made a conclusion that it is very desirable after choosing and finding the coefficients of any approximating equation to convert it into one definite function and develop the forecast apparatus, tables, nomograms and so on for it. This is the only way of using the wide class of approximating equations when having relatively small math and other provision of the forecast
Energy complex of the country is a collection of
electrical installations high and low voltage, producing,
transforming, transporting, distributing and consuming
electricity. A huge web of networks and more than 700
generating plants with a total capacity of about 230 GW
[1]. Almost 90% of this potential is formed in a unified
technical complex of the Unified energy system (UES)
[2]. Now there is a deterioration of the performance of
the sector. In comparison with 90-mi years of XX
century, more than 1.5 times increased power losses in
the power grids. Significantly increased the proportion
of obsolete electrical and auxiliary equipment, and the
load on the network every day only increase. All speaks
of the necessity of both local and global modernization
of the electric power complex of the country and the
creation of a new concept of consumption management
and energy distribution in the network. In the
framework of the energy strategy of the Government of
the Russian Federation dated 13 November 2009 #
1715-R, to improve handling and ensure reliable
operation of electric power systems, wider introduction
of flexible transmission system (FACTS devices) and
improvement of systems of automatic emergency
protection and dispatching control [1]. The development
of electric power complex of the country should be in
the way of intelligent networks. This is possible through
the use of modern components that can make the
process of managing "intelligent". In foreign literature,
this term is called the Smart Grid
Sanitization of eggs is an essential way to fight bacteria, fungi and other microorganisms. Hatchability of eggs and the safety of day-old chicks are dependent on the quality of eggs processing. Leading scientists of our country have proved high efficacy of ozone application for processing of hatching eggs. To obtain a positive result by this method of sanitizing hatching eggs ozone, it is necessary to create a uniform concentration of ozone around the egg store volume. Decrease in ozone concentration from the set point may result in insufficient exposure to pathogens and because of this, may reduce hatchability. Significant excess of ozone concentration from the set point can kill the embryo. Because of mathematical modeling of electro eggs ozone treatment process, there was a mathematical model of the process of electroozonation of egg stores of poultry farms. This model takes into account decomposition of ozone on the surface of eggs and decomposition of ozone on the walls of an egg store. This mathematical model proves the desired control action at different initial data, such as: the required concentration of ozone in the egg store, the number of eggs, egg store geometric dimensions, the fan power, the design parameters of the discharge unit, the location of the ozone generator in the room
Nigeria has the largest oil sands and bitumen resources
in Africa and is one of the main leading countries in the
world from the point of view of its significant potential
heavy oil deposits. Research of geological and physicochemical
properties confirmed that the Nigerian bitumen
is an important energy source and an alternative source
of hydrocarbon feedstock for the petrochemical industry.
Nigeria imports black oil for the petrochemical industry
and its heavy oil can act in place of this black oil. In
addition, researchers have successfully established the
possibility of producing electrical energy from this
heavy oil. Tar sands and bitumen are able to help
improve the economy of Nigeria
In the article, we present the mathematical model of a
ventilation system with variable air flow along the
vertical axis of the reactor in the composting process. We
have solved the problem of the choice of the method of
supplying air to the bioreactor, reducing the temperature
of the substrate along the axis of the bioreactor. The
proposed method provides a reduction of temperature
and moisture content of the gas phase, which leads to a
change in the dynamics of the composting process. This
article was prepared in the framework of the scientific
project 16-48-230441 a(R) "Mathematical modeling of
the processes occurring in the automated installation for
year-round production of organic fertilizers in the
conditions of the Krasnodar region", financed by RFBR
and administration of the Krasnodar region
At the present time, due to the high demands on the
stability of the networks and information security, the
actual problem is the choice in the market of software
and hardware products, the protection of information
assets from a number of different threats that arise in
the corporate network. Despite the fact that the market
for hardware and software products offers a lot of
information security, it is difficult to leaders and
experts to find out how they differ from each other,
and what principles should guide their choice. In the
article, for solving the problem of the choice of
remedies, their purchase and installation on
workstations and enterprise network servers, it is
proposed to use a comprehensive methodology, based
on the methods of the game theory and the analysis of
hierarchies
The article has a research character which is expressed through the analysis of ways and means of mechanization for harvesting of solanaceous vegetables, and also endurance from works of scientists on the studied subject. Vegetable growing is an important branch of agricultural production. From a set of vegetable plants the increasing significance is attached to cultures which production contains physiologically active agents. Solanaceous vegetables belong to these cultures. In Russia, vegetables on an industrial basis are cultivated in the south of the country. Everywhere in Russia crops of vegetables are reduced. It is explained by high costs of production, especially on harvesting that at the general deficiency of manual skills leads to reduction of the areas, violation of technology of cultivation and harvesting and, respectively, to decrease in productivity. In conditions import substitution of foreign agricultural production and increase in the areas of landing of vegetable cultures in the Russian Federation for creation of a safety cushion food in the conditions of food embargo, undoubtedly, will be required the maximum mechanization of technological process of cleaning of vegetables. The most important results of types of designs of machines for vegetables and, problems of use of modern machines for cleaning of vegetable cultures are given. Our own design for harvesting solanaceous vegetables is offered
The article has a research character which is expressed through the analysis of ways and means of mechanization for harvesting of cucumbers, and also through the works of scientists on the studied subject. Vegetable growing is an important branch of agricultural production. Among a set of vegetable plants the increasing significance is attached to cultures production of which contains physiologically active agents. Solanaceous vegetables belong to these cultures. In Russia, vegetables on an industrial basis are cultivated in the south of the country. Everywhere in Russia crops of vegetables are reduced. It is explained by high costs of production, especially on harvest that at the general deficiency of manual skills leads to reduction of the areas, violation of technology of cultivation and harvest and, respectively, to decrease in productivity. In the conditions of import substitution of foreign agricultural production and increase in the areas of landing of vegetable cultures in the Russian Federation for creation of a safety cushion of food in the conditions of food embargo, undoubtedly, there will be required the maximum mechanization of technological process of harvesting of vegetables. The article presents the most important results of new types of designs of machines for harvesting of vegetables and cucumbers in particular, as well as problems of use of modern machines for cleaning cucumbers and vegetable cultures
In order to reduce the impact of stress factors on the
body of pigs, new technologies and efficient
veterinary and preventive measures in breeding and
cultivation are being developed. The results of our
scientific and economic experiments found that the use
in daily diets of pregnant and lactating sows according
to our schemes of biological additives (to finish /
day.): Laktobifid (1 g), Immunobak (1 g), Provagen
(10 g ) Vetom 1.1 (50 mg / kg body weight), Bacell
(0.3% by weight of the feed) and Monosporin (10
mL), contributes to the improvement of their
reproductive qualities: for twins - on 2,2-12,2% by
krupnoplodnosti - by 8,0-10,7%, for milk - by 8,9-
36,5%, at the preservation of pigs - by 1,3-8,3%, by
weight of the nest 2 months of age - 22 , 9-38,9%
compared with the control. At weaning piglets from
sows experimental groups indicators of natural
resistance were significantly higher. The best
reproductive performance were observed in sows
treated with diet and probiotic supplements
Immunobak Bacell combined with Monosporin . The
results of these experiments revealed adaptogenic
properties of the studied additives, their ability to
mitigate the impacts of technological stresses,
reducing as a result of the cost of the products. Of
great practical importance is the ability to predict the
effectiveness of the use of additives which have antistress
effect, depending on the body weight of
animals, their age, frequency and duration of their
application before and after the impact of
technological stressors in the suckling period, the
periods of rearing and fattening up of live weight and
100 и 120 kg