№ 154(10), December, 2019
Public date: 30.12.2019
Archive of journal: Articles count 33, 93 kb
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08.00.13 Mathematical and instrumental methods of Economics
08.00.13 Mathematical and instrumental methods of Economics
DescriptionTo assess the impact of investments on the results of the Agro-industrial complex, we use an adaptive management system for open systems
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08.00.13 Mathematical and instrumental methods of Economics
DescriptionThe instrumental methods of economics include the Monte Carlo method (statistical simulations method). It is widely used in the development, study and application of mathematical research methods in econometrics, applied statistics, organizational and economic modeling, in the development and making management decisions, in the basis of simulation modeling. The new paradigm of mathematical research methods developed by us is based on the use of the Monte Carlo method. In mathematical statistics, limit theorems on the asymptotic behavior of the considered random values were obtained for many methods of data analysis with an unlimited increase in sample volumes. The next step is to study the properties of these random values for finite sample sizes. For such a study, the Monte-Carlo method is used. In this article, we use this method to study the properties of statistical criteria for testing the homogeneity of two independent samples. We considered the most used in the analysis of real data criteria - Cramer-Welch, which coincides with the equality of the sample sizes with Student's criterion; Lord, Wilcoxon (Mann-Whitney), Wolfowitz, Van der Waerden, Smirnov, type omega-square (Lehmann-Rosenblatt). The Monte Carlo method allows us to estimate the rates of convergence of distributions of criteria statistics to the limits, to compare the properties of the criteria for finite sample sizes. To use the Monte Carlo method, it is necessary to select the distribution functions of the elements of the two samples. For this purpose, normal and Weibull – Gnedenko distributions are used. The recommendation was received: to test the hypothesis of coincidence of distribution functions of two samples, it is advisable to use the Lehmann-Rosenblatt (type omega-square) test. If there is reason to assume that the distributions differ mainly by the shift, then the Wilcoxon test and Van der Waerden criteria can also be used. However, even in this case, the omega-square type test may be more powerful. In the general case, besides the Lehmann-Rosenblatt criterion, the use of the Smirnov criterion is permissible, although for this criterion the real level of significance may differ from the nominal level of significance. We sstudied the frequency of discrepancies of statistical findings on different criteria
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FINANCIAL RISK WARNING AT OIL PRODUCTION COMPANIES
08.00.13 Mathematical and instrumental methods of Economics
DescriptionThis article is devoted to a problem of effective management of a financial and economic condition of companies on the example of the enterprises of oil products supply. We consider questions of support of adoption of management decisions which concern stabilization of a financial condition of the company and as a result of decrease in financial risks. The article also provides a description of the program complex called FESP_ON developed by the authors allowing to carry out the profound complex assessment of a financial and economic condition of Societies of oil products supply
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08.00.13 Mathematical and instrumental methods of Economics
DescriptionIn their previous works, the authors solved the problem of cognitive-target structuring and formalization of the subject area, as well as the synthesis and verification of statistical and system-cognitive models. This work is devoted to the application of these models to solve the problem of forecasting the impact of the volume and direction of investment in agriculture on the economic component of the quality of life of the population of the region. This work is devoted to the use of previously created and verified models to solve the problem of decision-making on the volume and direction of investment in agriculture, improving the quality of life of the population of the region
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08.00.13 Mathematical and instrumental methods of Economics
DescriptionIn their previous works, the authors solved the problem of cognitive structuring and formalization of the subject area, as well as the synthesis and verification of system-cognitive models. This work is devoted to the problem of forecasting the impact of the nomenclature and sales volumes on the profit and profitability of a trading company
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PROSPECTS FOR THE DEVELOPMENT OF URBAN STREET ROAD INFRASTRUCTURE
08.00.13 Mathematical and instrumental methods of Economics
DescriptionThe development of a city can go in two ways -extensive and intensive. Intensive involves a qualitative rethinking of the necessary work, optimization and improvement on the basis of existing infrastructure. An extensive method of development is an increase in physical volumes, for example, an increase in territories. At the moment, the transport system of the city of Krasnodar is extremely busy. The city occupies one of the first places in the number of vehicles, roads with such a traffic load can not cope, resulting in numerous congestion on the roads. In addition, an average of 150 thousand cars enter the city every day, and this creates an additional burden on the transport system. In the morning there is a large influx of cars from the main entrances to the city. And in the evening there is no less strong loading points of entry into the city, as those who arrived in the morning leave the city. Information technology is designed to save our time and effort. At the same time, one of the problems that "eats" time is traffic jams. You can get from one place to another at one time, but subject to traffic jams, this time can increase several times. Why not use technical and software tools to solve this problem!? Now almost everyone has a smartphone, with a Navigator loaded into it. There are many variations of these navigators with approximately the same functionality. But what if the Navigator in your smartphone not only chose the shortest path for you, but also helped in unloading traffic throughout the city, reducing traffic congestion to a minimum
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08.00.13 Mathematical and instrumental methods of Economics
DescriptionThe problem of the optimal distribution of production tasks is one of the important problems of effective planning of processes associated with production at the enterprise. However, the classical approach to solving this problem becomes of little use when the individual stages of the production process are performed sequentially and in the case when it is necessary to take into account the structural features of the technological processes of the enterprise. Purpose of work: to develop a methodology for minimizing costs in the distribution of production tasks, taking into account the structural features of the technological processes of the enterprise. We built a multicriteria discrete optimization model for the distribution of production tasks according to the structure of production elements. One of the methods based on the proposed model is proposed, which allows to identify groups consisting of four elements in the production structure of the enterprise. The model is built using a network design which are pre-fractal graphs. The use of pre-fractal graphs allows you to naturally represent the structure of production and technological links of the elements of the production system of large enterprises. The results of the work is the developed effective methodology for solving the problem of the network distribution of production tasks, taking into account the structural features of technological processes at the enterprise, the economic effect of which is to minimize resource costs. Based on the constructed model, we can develop automated means of monitoring and managing the production processes of a company
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08.00.01 Economic theory (economic sciences)
SEARCHING FOR A MODEL OF EFFECTIVE ECONOMIC DEVELOPMENT: PROBLEMS AND PROSPECTS
08.00.01 Economic theory (economic sciences)
DescriptionThe article discusses the results of the international scientific and practical conference "Actual aspects of the implementation of the strategy of modernization of Russia: the search for a model of effective economic development", which was held from 3 to 5 October 2019 in Sudak, Republic of Crimea. The main substantive points of the conference were reflected; during the plenary session 16 reports were heard, in which the main aspects of research conducted in Russia in the scientific direction stated in the conference program were analyzed. The Conference included a round table and four sections. At these meetings, the problems of theory and practice of implementing the strategy of modernization of Russia in the search for a model of effective socio-economic development were predominant. As a result of the conference, a collection of scientific articles was published, its participants were awarded the appropriate certificates
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FATTENING QUALITIES AND MEAT PRODUCTIVITY OF SALSKAYA SHEEP BREED OF IMPROVED GENOTYPES
DescriptionImprovement of domestic breeds of Merino sheep remains an important task. The reorientation of the industry to wool-meat and meat-wool direction of productivity can contribute to the restoration of domestic sheep breeding. An example of such conversion is a relatively young breed called Dzhalginsky Merino, created in the Stavropol region on the basis of the Stavropol breed with the involvement of resources of domestic and world breeding. In the current situation, it seems relevant to use Dzhalginsky Merino, in order to improve the meat and wool qualities of sheep of domestic fine-wool breeds. Obtaining a new genetic combination of animals, formed by combining the genotypes of breeds Salsky, Stavropol and Dzhalginsky Merino will increase the efficiency of the industry in a market economy and will provide a more complete use of the productive potential of the breed. The results of studies on obtaining and use of animals, new genetic combinations of a wool – meat direction of productivity, with high energy of growth, meat and wool productivity, improves the efficiency of Merino sheep are an important theoretical justification for making a contribution to zootechnical science, with the aim of improving fine-wool breeds of sheep and can be used in practical work in the production of high quality lamb
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RATIONAL PHARMACOTHERAPY FOR PANCREATITIS IN DOGS
DescriptionDiseases of the digestive system are one of the huge problems of veterinary medicine and pharmacy. This group of diseases not only affects all age groups of animals, but can occur even in newborn puppies. It is very difficult to talk about the breed predisposition to pancreatitis in animals. Pancreatitis occupies one of the leading places in the structure of digestive diseases in animals. The urgency of this veterinary problem is increasing every year. Acute pancreatitis manifests itself suddenly, most often against the background of gross violations in feeding, with the disease of the duodenum and gallbladder. In this case, there is a violation of the outflow of secretion into the ducts of the pancreas. In the tissues of the pancreas there are diffuse changes up to necrosis. Severe inflammation of the pancreas leads to a sharp deterioration in the general condition of the body, sharply reduced blood pressure. The animal is in great pain, vomiting is observed. The animal needs urgent care. The disease can be chronic. Periods of exacerbation are repeated from time to time. The owners usually do not call veterinary specialists. Since the disease is manifested by symptoms characteristic of many pathologies of the gastrointestinal tract, it is therefore difficult to diagnose. In the history of the animal there are both diarrhea and constipation, the animal has a reduced appetite, in hotel cases there is cachexia. In hematological studies, we can note an increase in sugar levels. Therefore, for the differential diagnosis of the animal, we carry out ultrasound, x-ray diagnostics all together with biochemical methods of blood tests. In the future, when choosing treatment tactics, all diseases that could accompany inflammation of the pancreas are taken into account