№ 129(5), May, 2017
Public date: 31.05.2017
Archive of journal: Articles count 97, 240 kb
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06.00.00 Agricultural sciences
06.00.00 Agricultural sciences
DescriptionThe article is devoted to the various elements of the cultivation technology of winter wheat called Antonina with the application of different soil fertility backgrounds, fertilizer norms, and plant protection systems against weeds, pests and diseases. Investigations are carried out in a multivariate stationary experiment: factor ‘A’- soil fertility; factor ‘B’ - fertilizer system; factor ‘C’ - the system of plants protection; factor ‘D’ - the main methods of soil tillage. Four models of soil fertility levels were studied in the experiment: А0 - initial (natural background); А1 - medium (200 kg / ha Р2О5 and 200 t / ha of solid manure); А2 - high (double dose); at А3 - high (tripled) on three backgrounds of basic soil tillage: nonmoldboard, recommended, moldboard with deep bursting and without the application of tillage (direct seeding and the natural rate of soil fertility). The soil is heavy leached black humus with humus content in the arable layer of 2.5% - 2.9%. Based on examined researches it was found that for the sustainable yield of winter wheat the dose of mineral fertilizers should be increased, by that, the high quality of the grain is provided
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RESTORATION OF A MODEL OF A DYNAMIC NONLINEAR SYSTEM FROM THE TIME SERIES GENERATED BY IT
DescriptionThe main task in the analysis of time series is the reconstruction of the dynamical system that generated this series. To illustrate the nature of the behavior of a dynamic system described by a nonstationary time series, a «phase portrait» method is proposed. An acceptable description of the phase space of a dynamical system can be obtained if we take instead of real variables of the system delay vectors composed of the values of the series at consecutive moments of time. Restoration in a given class of a system of differential or difference equations is performed based on the scalar time series of the observed process. In order to eliminate the measurement error and accurately represent the position of the object in the current, future, or any of the past moments, it is proposed to apply the Kalman filter using the known mathematical model of object dynamics
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Description
This article is devoted to the problem of network attacks recognition, which is essential for providing network security. A research of neural network efficiency has been held. Such metaeuristic algorithms as genetic algorithm, gray wolf algorithm and firefly algorithm have been applied for the neural network learning. The algorithms’ fundamentals have been described. Multilayer perseptrone with sigmoid activation function has been selected for the task of network attack presence check. Various configurations of the neural network have been tested in order to find the optimal number of layers and neurons per layer, which ensure the least error. Learning has been performed by minimization of the average squared error between the network’s output and its target value with the help of the listed algorithms. Genetic algorithm requires accurate parameter picking in case of any network’s architecture alteration. Moreover, it is not as fast as firefly and gray wolf algorithms. Gray wolf algorithm appears to be the most effective one. However, it loses its efficiency if the number of layers is increased. Firefly algorithm proves to be the most universal one. Although it is less effective than gray wolf algorithm, it provides the most exact output even if the network’s structure is changed
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MODELING OF MANAGEMENT SITUATIONS IN CONSTRUCTION OF REAL ESTATE OBJECTS
DescriptionThe article proposes an approach to constructing a methodology for modeling managerial situations in the construction of real estate objects using a hierarchical system and choosing a developer company to be charged with the construction of real estate. A comprehensive methodology has been developed on the basis of which it is possible to forecast problem situations that arise during the construction of a real estate object and conduct a scientifically valid choice of a developer company
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OBJECTIVES AND METHODOLOGY OF CROSS-CUTTING DESIGN OF TECHNICAL SYSTEMS
DescriptionThe debate continues about reform of higher education In the country. We offer our point of view regarding the preparation of bachelors and masters on the direction of "Control of the technical systems". Department of automatic control systems leverages variable disciplines of specialization and optional subjects, forms a curriculum based on the needs of the business environment of the region or commissioned by a separate large enterprise. Students participate in the modules of project activities, form new and effective engineering solutions, to get skills of their practical implementation with regard to effectiveness, relevance and prospects of their further development. The production practice is very important in the preparation of bachelors and masters. To this end, the agreement on cooperation in the field of improvement of quality of preparation of students of SFedU concluded with the company RealLab (www.rlda.ru). It has allowed undergraduates to pass a work practice at the enterprise, custom-making thematic tasks of the enterprise on a contractual basis. Graduates of magistracy successfully find a job at the enterprise, providing thus strengthening of personnel structure. In this study, we propose a technique of teaching of bachelors and masters in "Control of technical systems". The main thesis is to use the technique of through projecting throughout the entire learning process. The trajectory of training is built for the student based on a module of project activity, training and production practices. The student studies the object, develops the control algorithm, programs it, chooses a set of technical means throughout the entire period of training with an exit to the protection of the final qualifying work
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THE ISSUE SEARCH FOR THE BEST METHODS OF SELECTING THE OPTIMAL POLICY REPLACEMENT VEHICLE FLEET
DescriptionThis article analyzes the best practices of choosing the optimal policy for replacement of vehicle fleet. The problem of replacement equipment was revealed. For each of these methods we gave objective function, constraints. We have found the best method of optimal plan of replacing the vehicle fleet in the company, allowing us to obtain accurate, economically viable new equipment purchase plan during a certain period. We have selected a number of important factors that influence the choice of payment method replacement policy and built PivotTable methods and factors. The selected as part of the research methodology will significantly reduce the labor and time, which will lead to an increase in productivity of the enterprise as a whole. The article gives a practical justification for the need to address the problem of choosing the optimal policy of replacing the vehicle fleet
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Description
In the context of implementing programs on reducing budget expenditures for the social sphere utilities, it is urgent to intrude renewable energy sources into the practice of their energy supply. However, despite all their diversity, not all constructions based on renewable energy sources can be used under conditions of urban development. Besides, the mutable nature of the solar radiation coming on the Earth's surface requires specific forecasts and calculations of its intensity. Accurate estimation of the area solar energy potential of the generating plant proposed location allows not only to justify its parameters at the design stage, but also to predict its operating mode and to evaluate its technical and economic efficiency. The purpose of the article is to estimate the level of solar radiation for Volzhsky, Volgograd Region, at the initial stage of designing and justifying the implementation of power plants transforming renewable solar energy in urban areas. In the article, it is proposed to apply method for estimating the solar energy potential of at a specific geographic point, based on a combination of the calculation method for determining the solar radiation characteristics and actinometric measurements. Volzhsky of the Volgograd Region, like most settlements in the Lower Volga region, has a high solar energy potential: 1228.8 kWh / m² for the horizontal surface of the southern orientation of the receiving surface of power plants, which can be increased by 16.2% at its optimal orientation relative to the horizon and the sides of the world. However, the expansion of the utilization of the solar energy potential of the district may be limited to the location of the existing buildings and structures at which power plants may be located in urban development conditions
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Description
The article has indicated the problem of the growth of document organization on the example of higher educational institution FGBOU "Kuban state technological University". Based on years of practice, the author conducted a detailed analysis of activity of service of documentary maintenance of management of the University and detailed analysis of the structure of the document taking into account the specifics of the direction of the organization. The article sets main tasks of service of the DOE, the actual problems of transition to paperless documentation of the organization's resources. We highlight problems of management and use of documents, due to the steady growth of documentary information. The major factors, influencing the growth of volumes of documents were given. Despite the rapid development of electronic document management in practice, electronic document duplicates the traditional paperwork. However, today the approach to document management is based on electronic technologies. The study of the author offers solutions to the general problem of reducing the volume of document workflow in the modern world
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USE OF GRAPE POMACE IN PRODUCTION OF FLOUR CONFECTIONERY PRODUCTS
DescriptionThe object of the study was the sweet pomace of red varieties of grapes grown in village Taman Temryuk district of the Krasnodar region. By grinding in a laboratory mill and drying in a drying oven at a temperature of not above 60 ºC, a powder is obtained from the mash. Its quantitative chemical analysis has been carried out. The mobile forms of metals and the total content of metals are determined. The content of mercury, lead, arsenic does not exceed the permissible levels of the maximum content of toxic elements in flour confectionery products. The influence of powder from grape pomace on the quality of the finished product and on the properties of the pastry test was studied, as the control sample was chosen the recipe for the sugar cookies "Carrot". A part of the flour was replaced with grape-dried powder in amounts of 1 %, 2 %, 5 % of the mass of wheat flour of the highest grade in the test. The recipe of sugar cookies with the addition of powder from grape pomace and without, calculated on 200 g of finished product, and organoleptic parameters of the finished biscuit is given. It is established that the use of grape-dried powder allows to increase the mass fraction of dry substances and to reduce the mass fraction of sugar in confectionery products, as well as to enrich them with mineral substances, microelements, which are necessary for normal functioning of the organism. Biscuits with the addition of powder from grape pomace are a good source of ballast substances reducing caloric content, which contributes to the removal of harmful substances from the body: cholesterol, heavy metal salts, etc
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Description
The article deals with the application of the theory of regulation for the synthesis of technological mechanical devices and their replacement by electrical or electronic analogs in order to reduce energy processes in soil cultivating and sowing machines