Scientific Journal of KubSAU

Polythematic online scientific journal
of Kuban State Agrarian University
ISSN 1990-4665
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Name

Laptev Vladimir Nikolayevich

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associated professor

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Kuban State Agrarian University
   

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Articles count: 38

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302 kb

ABOUT TECHNOLOGIES FOR DEVELOPING SOFTWARE APPLICATIONS FOR THE GENERATION AND VERIFICATION OF PRACTICAL TASKS IN MATHEMATICAL DISCIPLINES

abstract 1562002008 issue 156 pp. 143 – 158 28.02.2020 ru 6
This article discusses the general principles of developing software applications for generating and verifying practical tasks in mathematical disciplines in the Visual Basic for Application development environment. The article describes the structure of computer programs, the main components of the implemented macros are also investigated, the algorithms of the basic procedures are given. A special place is given to the problems of identifying students and protecting the generated data. We have also given recommendations on the use of developed programs in the educational process
191 kb

ANALYSIS AND ACCOUNTING OF POWER LOSSES WHEN ENERGY TRANSIT AND THEIR DISTRIBUTION AMONG PARTICIPANTS OF ENERGY EXCHANGE

abstract 1331709060 issue 133 pp. 786 – 796 30.11.2017 ru 95
The work is done in scientific and practical directions for minimization of power losses in transmission of electricity to local distribution networks between the actors of the energy (producers and consumers) of energy-saving technologies focused on technological activities such as modernization and reconstruction of networks. Quite often in various circuits of power systems, it is advisable to transfer energy and its power through intermediate (transit) nodes. Structural changes in the electricity sector, at present, are mainly associated with the introduction of market relations between the subjects of energy exchange; therefore, in this work special attention is paid to the problem of calculating the power losses, as it is nonlinearly dependent on the power at the nodes and branches of a network. It should be noted that the nodes in problems transit capacity could be both sources and consumers. The latter necessitated the need for search of possible ways to reduce transportation losses of energy due to both the improvement and optimization of distribution networks and through the use of intermediate transit nodes. It follows that the transportation problem in this formulation is more General and expands the possibilities of optimization of power losses for the local subsystems of the energy clusters. The work is composed of the transport matrix for solving problems transit capacity, where the algorithm taking into account the distinctive features of which consist in the use of continuous numbering of sources and consumers in the matrix, and any node can be a transit country. The transit capacity ii-th node Zii=0, and the dimension of the matrix in contrast to the previously considered tasks has (n+m) (n+m) and it remains square as all the transport problems of linear programming. Transit variables Xii are included in the solution of the problem with a minus sign, and all transit variables are considered basic. From the above example in the work of a number of branches of a network is minimal, which significantly reduces the cost of building and maintaining the network, and the solver minimizes the power loss between the subjects of energy exchange and, as a result to savings from the standpoint of cost of construction of the network and the management of overflows of energy in it
580 kb

ANALYSIS OF CONDITIONS OF FORMING EFFECTIVE ASSOCIATIONS OF DAIRY SUBCOMPLEX ENTERPRISES OF AIC

abstract 1321708012 issue 132 pp. 128 – 155 31.10.2017 ru 133
The authors investigate the conditions conducive to the formation of effective associations of raw material enterprises of the agroindustrial complex and raw material processors. The unbalanced process of relations between agricultural producers and processing plants negatively affects the economic position of the partners of the merger. The diktat of low purchasing prices for raw materials by processing enterprises hinders the cost-effective operation of agricultural commodity producers. Procurement prices set by dairy processing enterprises for milk do not compensate not only production costs, but also losses from inflation. This leads to a sharp decline in the profitability of milk production. A paradoxical situation arose: on the one hand dairy plants encountered an acute shortage of raw materials, on the other, the problem of selling milk by its producers at an acceptable price was aggravated. The disparity between the purchase prices for milk and retail prices for dairy products has led agricultural enterprises to explore alternative markets. On the basis of the mathematical model of the agricultural consumer cooperative, conditions for the formation of effective associations of enterprises of the dairy subcomplex of the agroindustrial complex are analyzed
247 kb

ANALYSIS OF CONTEMPORARY FORMS OF INTEGRATION AGRICULTURAL PRODUCERS AND PROCESSING ENTERPRISES OF AIC

abstract 1231609096 issue 123 pp. 1392 – 1422 30.11.2016 ru 150
The development of agro-industrial integration is an objective economic process involving, on the one hand, with the social division of labor and specialization, on the other - with the necessity of interaction between specialized sectors and modes of agricultural production. Agrarian enterprises come into this unification movement, seeking to reduce the risk, the occurrence of which is associated with the production depends on climatic conditions, natural agricultural products market, the dictates of the processing enterprises, the need to improve the competitiveness of production. Processing and service companies are also seeking to secure a stable income thanks to the raw material base, better use of raw materials, improving the quality of its products, decreasing the price and conquering markets. In most cases, the object is to integrate agriculture, and direct or indirect initiators often are non-agricultural plants and firms that concentrate the bulk of production and sales of AIC final product. As a result, the concentration of production results in savings on its scale, so-called technical-technological economy. Increased production expands beyond the optimal use of machinery and equipment. The more spread out are agricultural producers, so it is more difficult to realize their interests for scaling up. In the Russian practice we have developed a variety of organizational forms of integration differ in the nature of economic relations between the parties, the degree of independence of members of the business combination, the combination of centralization and decentralization. Conventionally, they are divided into associative - "soft" and corporate - "hard". By "soft" forms of association include associations, unions, non-profit partnership and a strategic alliance. They can function effectively at the interregional level. Hard type of integration ties characteristic of plants, corporations, trusts, holding companies. Agricultural credit consumer cooperatives (ACCC) is a voluntary association of individuals and legal entities residing or conducting their business activities in certain rural areas, on the basis of membership and monetary union shares in order to meet the needs of the members in the credit and other banking services
177 kb

ANALYSIS OF METHODS AND MEANS OF EXTRACTING KNOWLEDGE AND ASSESSING THE QUALITY OF MODELS IN THE DSS FOR INDUSTRIAL-TECHNOLOGICAL AND CONSTRUCTION INDUSTRIES

abstract 1572003013 issue 157 pp. 170 – 181 31.03.2020 ru 6
The article considers the most used methods and means of knowledge extraction taking into account the quality assessment of models in decision support systems. In scientific and practical terms, the possibilities of joint effective use of expert systems, data mining (IAD) and machine logical inference (MLV), which provides deeper data processing, taking into account the significant differences between databases (DB) and knowledge bases (BZ). DB is a unit of information unrelated to each other information, while BZ – not only related to each other, but also with the concepts of the world, which makes it possible to solve complex multi-criteria problems in various subject areas. Currently, increasing attention is paid to non-network technologies that have the ability to simulate nonlinear processes, work with noisy data, as well as the ability to learn and self-study, extracting essential features from the incoming information. At the same time, the integration of neural network technologies and artificial intelligence models into a single hybrid system together with the methods of logical inference in the form of a hierarchical sequence of the "If-then" rules structure significantly improves the understanding of the studied process and the quality of presentation of the result. Nevertheless, these methods and means of knowledge extraction are insufficient if the fuzzy linguistic inference mechanism is not used. The basic characteristic of fuzzy sets is the membership function, which is a generalized characteristic of a normal set. To set this feature, we use three types of shapes – triangular, trapezoidal and Gaussian type and two main procedures – phasefication and de-phaseification which is considered by the example of the method of Mamdani. Along with the stated most promising direction in this area is the adaptive gain algorithm called AdaBoost, where the limitation of the gain due to the filtering is to apply the subsampling circuit which has the normal contour of batch training, reusable training data. This provides an opportunity to work with weak models, and in the conditions of hybridization causes efficiency increase, strengthens the classifiers united in the "Committee". Each next set of classifiers is built on objects incorrectly classified by previous sets. AdaBoost is sensitive to data noise and emissions and is less susceptible to retraining, which can significantly reduce the number of examples and obtain better output in the DSS
1298 kb

APPLICATION OF THE METHOD OF THE INDUCTIVE FORECASTING OF STATES FOR DETECTION OF COMPUTER ATTACKS IN INFORMATION-TELECOMMUNICATION SYSTEMS

abstract 0721108037 issue 72 pp. 403 – 412 30.10.2011 ru 925
The problem of acquisition of computer attacks is considered. It is demonstrated that it is a solution of combinatorial problems, and their solution is bound to fork of solving processes, with search of alternatives that grows fast at thickening of system of regularities. Such search is foregone, but it can be reduced to the reasonable magnitude, allowing solving problems of acquisition of computer attacks. Application of inductive forecasting of statuses will allow to inoculate knowledge base in an automatic mode, to shape the new rules and to delete the old ones
188 kb

APPROACHES TO THE IMPROVEMENT OF INTEGRATED INDUSTRIAL SYSTEMS OF A SUGAR SUB COMPLEX OF AGRO-INDUSTRIAL COMPLEX

abstract 0390805010 issue 39 pp. 183 – 190 30.05.2008 ru 3245
With development of integration processes in agro- industrial complex there was an opportunity of decrease of a sugar sub complex dependence on import of raw materials and development of its own raw-material base. Ways of development of integrated industrial system of a sugar sub complex (IIS SS) of agro-industrial complex became certain. Three models of its development are presented. Necessity of integration in a sugar sub complex of agro- industrial complex was substantiated. Integration promotes decrease in costs under production and processing of sugar beets, causing that not only minimization of organizational costs, but also the necessity of introduction of innovative technologies by producers. In the IIS SS there is a necessity to create the selling service (marketing service, etc.) which promotes increase in its profit. Consolidation (merger) of industrial systems in a sugar sub complex should be a controlled process of FAS.
855 kb

DEVELOPMENT OF AN EXPERT SYSTEM FOR DIAGNOSIS MALFUNCTIONS OF ENGINES OF DIESEL POWER STATIONS

abstract 1141510032 issue 114 pp. 435 – 455 30.12.2015 ru 1002
The article considers development of expert system based on semantic networks for diagnosis malfunctions of the diesel power stations engines. The method allows developing expert systems via objectoriented programming language. The expert system allows to identify the problem without involving additional staff: at the start and overheats of the engine, when there is low power, with decreasing pressure etc
561 kb

EVALUATION OF THE INFLUENCE OF INVESTMENTS ON THE RESULTS OF THE ACTIVITY OF AGRICULTURE WITH THE USE OF THE MECHANISM OF ADAPTIVE MANAGEMENT OF OPEN SYSTEMS

abstract 1541910004 issue 154 pp. 23 – 33 30.12.2019 ru 4
To assess the impact of investments on the results of the Agro-industrial complex, we use an adaptive management system for open systems
108 kb

FUNDAMENTAL THEOREM OF ARITHMETIC AND SOME OF ITS ASPECTS

abstract 1131509010 issue 113 pp. 127 – 132 30.11.2015 ru 589
In this article, we present the fundamental theorem of arithmetic and its role. We consider various rings for its performance
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