scholarly journals Experimental studies of the parameters of a positional sprinkler system

2021 ◽  
Vol 273 ◽  
pp. 07012
Author(s):  
Mikhail Kostenko ◽  
Vladimir Teterin ◽  
Dmitry Melnichuk ◽  
Sergei Mitrofanov ◽  
Alexey Podyablonskiy
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Analysis ◽  
Water Regime ◽  
Soil Layer ◽  
Experimental Studies ◽  
Sprinkler System ◽  
Agricultural Crops ◽  
Structural Diagram ◽  
Design Features

The most important factor affecting the yield of agricultural crops is the formation of an optimal water regime in the active soil layer. One of the main methods of carrying out such works is sprinkling, since it is closest to the process of natural precipitation. At the same time, existing water sprinklers do not provide watering agricultural lands that meets agro-technological requirements due to the design features and the specifics of the landscape on which they are used, forming in the process of watering zones with excessive and insufficient moisture. In this regard, a positional water sprinkler has been developed, which has the ability to water along a path close to rectangular. Obtaining this trajectory is achieved due to the design features obtained as a result of mathematical modeling. The article presents the structural diagram of the developed water sprinkler, considers the principle of its operation, presents the results of mathematical analysis and modeling of kinematic processes occurring during its operation. The above research results show that the use of the proposed water sprinkler will improve the quality of watering due to the watering trajectory closest to rectangular.

scholarly journals ON THE ISSUE OF APPLICATION OF MICROELEMENT ADDITIVES IN THECOMPOSITION OF AGROCHEMICAL RECLAMATION TECHNIQUES ON DEGRADED CHERNOZEMS

2020 ◽  
Vol 5 (4(73)) ◽  
pp. 27-29
Author(s):  
A.V. Ilinskij
Keyword(s):  
Crop Yields ◽  
Soil Layer ◽  
Soil Formation ◽  
Element Composition ◽  
Enzymatic Reactions ◽  
Agricultural Crops ◽  
Specific Element ◽  
The World ◽  
Complex Methods

Features of soil formation and the specific element composition of the parent rock of podzolized and leached chernozems of the Ryazan region predetermined the specifics of the content of trace elements in the arable soil layer. For example, the content of such important microelements for agricultural crops as molybdenum and manganese is lower than the criteria for the global assessment of the "soil of the world". These microelements are involved in metabolism and enzymatic reactions, their lack leads to both a decreasein crop yields and a deterioration in the quality of crop products. It is possible to correct this situation by using trace element additives in the development of complex methods of agrochemical reclamation of degraded chernozems

scholarly journals The results of research on tillage rollers with an economic assessment of the effectiveness of their use

2020 ◽  
Vol 193 ◽  
pp. 01002
Author(s):  
Ivan Sharonov ◽  
Vladimir Кurdyumov ◽  
Yuri Isaev ◽  
Viktor Kurushin
Keyword(s):  
Spring Barley ◽  
Economic Effect ◽  
Soil Layer ◽  
Experimental Studies ◽  
Economic Assessment ◽  
Design Parameters ◽  
Agricultural Crops ◽  
Serial Ring ◽  
Fine Grained ◽  
Scientific Hypothesis

The study confirmed the set scientific hypothesis that to improve seed germination and uniformity of germination of cultivated agricultural crops and increase their yields possible while performing operations field preparation, sowing, formation of the desired profile, density and structure of the soil over the sown seeds on the basis of application of innovative methods and means of mechanization of surface tillage. As a result of experimental studies, the design parameters of the developed innovative agricultural tools have been optimized. When combined, they provide the required fine-grained and optimally compacted soil layer, in which the seeds of agricultural crops are located. As recommendations to agricultural production, the actual value of the specific mass of the developed rollers is established, taking into account ballasting loads per 1 m of the width of the grip, the value of which is within 95...160 kg, depending on the shape and design of the working elements, as well as on the properties of the processed medium. In the course of evaluating the metal capacity of innovative agricultural tools and serial ring-spur roller, a difference of 64% per unit of widthof the grip was revealed. Defined increase of productivity when using the developed means of mechanization of surface tillage for spring barley to 14% and 16 %, spring wheat by 11 % and 14 %, winter wheat up to 7% and 9% respectively compared with serial ring-spur roller and disc rollers seeder. Based on the economic assessment of the compared seeding technologies, the annual economic effect of the introduction of innovative tillage rollers was established, which amounted to 64…69 $ by 1 ha of spring barley crops.

scholarly journals IMPROVEMENT OF VIBRATING FEEDERS-SCREENS FOR MINING AND METALLURGICAL INDUSTRY

2018 ◽  
Vol 61 (6) ◽  
pp. 470-477
Author(s):  
V. I. Lyashenko ◽  
V. Z. Dyatchin ◽  
V. P. Franchuk
Keyword(s):  
Mathematical Modeling ◽  
Driving Forces ◽  
Experimental Studies ◽  
Feasibility Studies ◽  
Metallurgical Industry ◽  
Spatial Oscillation ◽  
Loading Modes ◽  
Vibrating Feeders ◽  
Vibrating Feeder

The main scientific and practical results of the improvement of  vibrating feeders-screens for mining and metallurgical industry are  presented on the basis of dynamic calculation of the vibrating feederscreen with two differently directed self-balancing vibrators. Methods  of theoretical generalizations are described using mathematical statistics, physical and mathematical modeling, computation and feasibility studies, laboratory and full-scale experimental studies, industrial  tests in the conditions of operating enterprises using standard and new  methods. Mathematical modeling and calculation of the parameters of  a vibrating feeder of the PVG type are proposed. It is recommended  when choosing dynamic parameters of the feeder, to use the vibration  transmission coefficient, which is taken within the limits (1.5  –  3.5)g,   and in heavy loading modes, is up to 5g. It is shown that during preparation of breeze coke in the crushing body, from 10 to 50  % of fine  material is received from its bunker with a particle size of 0  –  3  mm,  which is additionally re-milled, reducing the quality of coke. A vibrating feeder-screen with a spatial oscillation of the working element will  increase the efficiency of screening of the material by 15  –  20  % and  will improve the self-cleaning of the screen. The driving forces of the  exciters are directed at different angles of 15 and 45° to the screening surfaceand are attached from each other at a distance equal to half  width of the box, i.e. 600  mm. It is established that in the resonance  mode at a constant amplitude with increasing frequency the coefficient  of the vibro-displacement regime increases according to a quadratic  dependence, at a working frequency of 100 rad/s it also increases from  the loading edge of the feeder to the unloading and from one side to  another, the value of which varies within 2.62  –  2.84.

scholarly journals Modelling of technological process of joining steel ropes with the use of powder antifriction material and a conductor

2021 ◽  
Vol 2131 (4) ◽  
pp. 042060
Author(s):  
E V Marchenko ◽  
A A Korotky ◽  
S I Popov ◽  
Ju V Marchenko ◽  
E E Kosenko
Keyword(s):  
Mathematical Modeling ◽  
Experimental Studies ◽  
Antifriction Material ◽  
Working Environment ◽  
Labor Process ◽  
Structural Defects ◽  
Field Observations ◽  
Steel Rope ◽  
Joint Section

Abstract When determining the causes of structural defects of a steel rope, the technology of carrying out work on splicing by a team of specialists was studied in detail. Field observations and experimental studies, as well as mathematical modeling of the process of structural defects formation in the rope joint section, allowed to establish that the cause is the imperfection of the existing technology for performing splice work [1-5]. The existing technology directly depends on the experience (professionalism) of a splicing team and provides for the work on splicing, as a solution to a new problem for every hawser, expressed in the design and calculation of the main parameters, according to the established standards of the rope manufacturer. It is noted that this labor function negatively affects a person, causing dangerous and harmful factors of the working environment, such as: severity and intensity of the labor process. Under the influence of dangerous and harmful factors, the specialist is subject to: static and dynamic overload, mental overstrain, neuropsychiatric overload, which negatively affect a person and, as a result, affect the quality of the work performed as a whole. The total accumulation of dangerous factors in the course of work leads to the decrease in the quality of the obtained results and deviation from the normalized indicators, which is unacceptable and leads to the formation of structural defects of a steel rope.

ABOUT NECESSITY OF MATHEMATICAL MODELING OF THE BUSINESS PROCESS OF COST ESTIMATE CALCULATIONS IN THE CONSTRUCTION OF OIL AND GAS FACILITIES

2017 ◽  
pp. 139-145
Author(s):  
R. I. Hamidullin ◽  
L. B. Senkevich
Keyword(s):  
Mathematical Modeling ◽  
Quality Assessment ◽  
Business Process ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Gas Industry ◽  
Construction Organizations ◽  
The Cost ◽  
Cost Of Construction

A study of the quality of the development of estimate documentation on the cost of construction at all stages of the implementation of large projects in the oil and gas industry is conducted. The main problems that arise in construction organizations are indicated. The analysis of the choice of the perfect methodology of mathematical modeling of the investigated business process for improving the activity of budget calculations, conducting quality assessment of estimates and criteria for automation of design estimates is performed.

The system of indicators of the quality of the carbon-carbon composite materials and technologies of their production

2018 ◽  
pp. 127-132
Author(s):  
T. N. Antipova ◽  
D. S. Shiroyan
Keyword(s):  
Composite Material ◽  
Low Cost ◽  
Experimental Studies ◽  
Carbon Matrix ◽  
Carbon Composite ◽  
Optimal Number ◽  
Laboratory Equipment ◽  
Carbon Composite Material ◽  
Carbon Composite Materials

The system of indicators of quality of carbon-carbon composite material and technological operations of its production is proved in the work. As a result of the experimental studies, with respect to the existing laboratory equipment, the optimal number of cycles of saturation of the reinforcing frame with a carbon matrix is determined. It was found that to obtain a carbon-carbon composite material with a low cost and the required quality indicators, it is necessary to introduce additional parameters of the pitch melt at the impregnation stage.

On the displacements of the contours of the optic-electronic space images. Mathematical modeling of displacement

2017 ◽  
Vol 992 (4) ◽  
pp. 32-38 ◽  
Author(s):  
E.G. Voronin
Keyword(s):  
Mathematical Modeling ◽  
Remote Sensing ◽  
Mathematical Model ◽  
Point Of View ◽  
Design Features ◽  
Space Images ◽  
Electronic Imaging ◽  
Measuring Accuracy ◽  
Physical Laws

The article opens a cycle of three consecutive publications dedicated to the phenomenon of the displacement of the same points in overlapping scans obtained adjacent CCD matrices with opto-electronic imagery. This phenomenon was noticed by other authors, but the proposed explanation for the origin of displacements and the resulting estimates are insufficient, and developed their solutions seem controversial from the point of view of recovery of the measuring accuracy of opticalelectronic space images, determined by the physical laws of their formation. In the first article the mathematical modeling of the expected displacements based on the design features of a scanning opto-electronic imaging equipment. It is shown that actual bias cannot be forecast, because they include additional terms, which may be gross, systematic and random values. The proposed algorithm for computing the most probable values of the additional displacement and ways to address some of the systematic components of these displacements in a mathematical model of optical-electronic remote sensing.

scholarly journals The use of mathematical modelling to analyse the process of mixing waters from different sources in water supply system

2018 ◽  
Vol 59 ◽  
pp. 00025
Author(s):  
Agnieszka Szuster – Janiaczyk ◽  
Rafał Brodziak ◽  
Jędrzej Bylka
Keyword(s):  
Mathematical Modeling ◽  
Water Quality ◽  
Quality Criteria ◽  
Supply System ◽  
Network Control ◽  
Quality Of Water ◽  
Water Mains ◽  
Different Sources ◽  
Mixing Water

One of the processes that significantly determines the quality of water to consumers is the process of mixing water from different sources in the water mains. Put to the network two or more chemically and biologically stable waters may result in the formation of water that will be deprived of these features. This article presents the german guidelines for analysing water quality for mixing waters from different sources, in various proportions. Then performed an analysis of utility the mathematical models,including quality criteria, for use in network control. An IT tool has been developed to manage selected water quality processes using mathematical modeling. The basis for implementing the tool was a network model created in Epanet integrated with the Matlab.

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