http://eu-jr.eu/engineering/issue/feedEUREKA: Physics and Engineering2020-01-14T15:22:05+02:00Helen Klimashevskainfo@eu-jr.euOpen Journal Systems<p align="justify"><strong><strong>EUREKA</strong><span>: </span><strong>Physics and Engineering</strong> - </strong>scientific journal whose main aim is to publish materials allowed to see <strong><em>new discoveries at the intersection of sciences.</em></strong></p>http://eu-jr.eu/engineering/article/view/1102ALGORITHM FOR SOLVING THE INVERSE PROBLEMS OF ECONOMIC ANALYSIS IN THE PRESENCE OF LIMITATIONS2019-12-20T17:52:28+02:00Ekaterina Gribanovageb@asu.tusur.ru<span lang="EN-US">The solution of inverse problems is considered taking into account the restrictions using inverse calculations. An algorithm is proposed for solving the inverse problem, taking into account restrictions while minimizing the sum of the absolute values of the changes in the arguments. The problem of determining the increments of the function arguments is presented as a linear programming problem. The algorithm includes solving the inverse problem with the help of inverse calculations while minimizing the sum of the absolute changes in the arguments, checking the correspondence of the obtained arguments to the given restrictions, adjusting the value of the argument if it goes beyond the limits of acceptable values, and changing the varied arguments to achieve the given value of the resulting indicator. The solution of two problems with the additive and mixed dependence between the arguments of the function is considered. It is shown that the solutions obtained in this case are consistent with the result of using an iterative procedure based on changing the resulting value to a small value until a given result is achieved, and the results are compared with solving problems using the MathCad mathematical package. The advantage of the algorithm is a smaller number of iterations compared to the known method, as well as the absence of the need to use coefficients of relative importance. The presented results can be used in management decision support systems</span>2019-12-20T17:52:28+02:00Copyright (c) 2019 Ekaterina Gribanovahttp://eu-jr.eu/engineering/article/view/1106RESEARCH OF MAGNETIC FIELD DISTRIBUTION IN THE WORKING AREA OF DISK SEPARATOR, TAKING INTO ACCOUNT AN INFLUENCE OF MATERIALS OF PERMANENT MAGNETS2020-01-14T15:22:05+02:00Iryna Shvedchykovaishved@i.uaInna Melkonovainna.mia.lg@gmail.comJulia Romanchenkoromanchenkojulia321123@gmail.com<span lang="EN-US">Based on the results of a numerical-field analysis of the distribution of the magnetic force field in the working area of the disk magnetic separator, designed to clean bulk substances from ferromagnetic inclusions, the influence of the magnetic material of the poles of the magnetic system on the field distribution is determined. A consistent study of two magnetic systems assembled on the basis of magnetic materials of different classes is carried out. The finite element method implemented in the COMSOL Multiphysics software environment is used to calculate the distribution of magnetic induction in a disk magnetic separator with rare-earth and ferrite magnets. Due to the complexity of the spatial geometry of the force field in the working area of the disk magnetic separator, a three-dimensional model of the magnetic system is developed. A comparative analysis of the distribution of the magnetic force field in the working area of the disk separator with a highly coercive magnetic system and with a magnetic system based on ferrite blocks is carried out. As a result of the analysis, it is found that the indicators of the intensity and heterogeneity of the magnetic field for a highly coercive magnetic system significantly exceed the corresponding parameters of a ferrite magnetic system. It is proved that when choosing magnets for the magnetic system of a disk separator, preference should be given to highly coercive alloys, the magnetic properties of which significantly exceed the magnetic properties of ferrite magnets. To reduce the cost of the magnetic system of the disk separator, the use of a combined magnetic system assembled from magnetic materials of different classes is proposed. Studies of combined magnetic systems with various mass fractions of magnetic materials are done. The ratio of the mass fractions of magnets of various properties in the poles of the magnetic system is determined, at which sufficiently high magnetic characteristics are provided in the working area. It is shown that the presence of a ferrite fraction in the magnetic poles not only reduces the cost of the magnetic system of the separator, but also reduces the mass of the system. The tasks of further research are justified</span>2019-12-30T14:40:53+02:00Copyright (c) 2019 Iryna Shvedchykova, Inna Melkonova, Julia Romanchenkohttp://eu-jr.eu/engineering/article/view/1101DEVELOPMENT OF BASIC CONCEPT OF ICT PLATFORMS DEPLOYMENT STRATEGY FOR SOCIAL MEDIA MARKETING CONSIDERING TECTONIC THEORY2019-12-20T17:52:41+02:00Ivan Demydovivan.v.demydov@lpnu.uaNajm Ahmad Baydounnajem.b@iptpowertech.comMykola Beshleybeshlebmi@gmail.comMykhailo Klymashmykhailo.m.klymash@lpnu.uaOleksiy Panchenkooleksij@gmail.com<span lang="EN-US">This paper presents authors analytical view on social impacts as targeted advertisement into the network environment using Omori tectonic theory for description the processes of audience response evolution. This could be extremely important and useful in the modern world to realize desirable e-Gov informational policy in the circumstances of hybrid treats emergence that is especially relevant for the informational space and reaching a cyber-supremacy. Some mathematical and algorithmic basics were contributed for narrative description of information and communications technologies (ICT) architectural deployment could be used for outer regulation of audience response character by Social Media Marketing (SMM) principles. That could be performed by controlled distribution of specified digital content that contains respective key phrases, for example social advertisements and analyzing respective feed-backs. Some results of the empiric study of live audience response dependence on controlled impacts are discussed. Election processes data and recent media recordings for preliminary proof of the contributed concept feasibility have been analyzed. There were shown using gathered empiric data sets, that the extent of impacts to targeted audience response intensity could be the subject of outer regulation. The index has been contributed for assessment the efficiency of the impact’s propagation inside the audience by calculation of row correlation of keyword occurrence and audience response intensity. The approaches suggested in the article can be useful both for building effective interactive systems of state-society interaction and for detecting manipulative traits when influencing a specific audience</span>2019-12-20T17:52:41+02:00Copyright (c) 2019 Ivan Demydov, Najm Ahmad Baydoun, Mykola Beshley, Mykhailo Klymash, Oleksiy Panchenkohttp://eu-jr.eu/engineering/article/view/1103DEVELOPMENT OF INFORMATION VISUALIZATION METHODS FOR USE IN MULTIMEDIA APPLICATIONS2019-12-20T18:28:34+02:00Yevhen Hrabovskyimaxmin903@gmail.comNatalia Brynzanatalia.brynza@hneu.netOlga Vilkhivskagrom_o@i.ua<p>The aim of the article is development of a technique for visualizing information for use in multimedia applications. In this study, to visualize information, it is proposed first to compile a list of key terms of the subject area and create data tables. Based on the structuring of fragments of the subject area, a visual display of key terms in the form of pictograms, a visual display of key terms in the form of images, and a visual display of data tables are performed. The types of visual structures that should be used to visualize information for further use in multimedia applications are considered. The analysis of existing visual structures in desktop publishing systems and word processors is performed.</p><p>To build a mechanism for visualizing information about the task as a presentation, a multimedia application is developed using Microsoft Visual Studio software, the C# programming language by using the Windows Forms application programming interface. An algorithm is proposed for separating pieces of information text that have key terms. Tabular data was visualized using the “parametric ruler” metaphorical visualization method, based on the metaphor of a slide rule.</p>The use of the parametric ruler method on the example of data visualization for the font design of children's publications is proposed. Interaction of using the method is ensured due to the fact that the user will enter the size of the size that interests for it and will see the ratio of the values of other parameters. The practical result of the work is the creation of a multimedia application “Visualization of Publishing Standards” for the visualization of information for the font design of publications for children. The result of the software implementation is the finished multimedia applications, which, according to the standardization visualization technique in terms of prepress preparation of publications, is the final product of the third stage of the presentation of the visual form2019-12-20T17:53:08+02:00Copyright (c) 2019 Yevhen Hrabovskyi, Natalia Brynza, Olga Vilkhivskahttp://eu-jr.eu/engineering/article/view/1108DEVELOPMENT OF METHODS FOR DETERMINING THE CONTOURS OF OBJECTS FOR A COMPLEX STRUCTURED COLOR IMAGE BASED ON THE ANT COLONY OPTIMIZATION ALGORITHM2020-01-14T15:20:54+02:00Hennadii Khudov2345kh_hg@ukr.netIgor Rubanruban_i@ukr.netOleksandr Makoveichukomakoveychuk@gmail.comHennady Pevtsovpevz_gv@ukr.netVladyslav Khudovvladkhudov@gmail.comIrina Khizhnyakkhizh_ia@ukr.netSergii Fryzsfriz_69@ukr.netViacheslav Podlipaievpva_hvu@ukr.netYurii Polonskyiupol_71@gmail.comRostyslav Khudovrhudov@gmail.com<p>A method for determining the contours of objects on complexly structured color images based on the ant colony optimization algorithm is proposed. The method for determining the contours of objects of interest in complexly structured color images based on the ant colony optimization algorithm, unlike the known ones, provides for the following. Color channels are highlighted. In each color channel, a brightness channel is allocated. The contours of objects of interest are determined by the method based on the ant colony optimization algorithm. At the end, the transition back to the original color model (the combination of color channels) is carried out.</p><p>A typical complex structured color image is processed to determine the contours of objects using the ant colony optimization algorithm. The image is presented in the RGB color space. It is established that objects of interest can be determined on the resulting image. At the same time, the presence of a large number of "garbage" objects on the resulting image is noted. This is a disadvantage of the developed method.</p><p>A visual comparison of the application of the developed method and the known methods for determining the contours of objects is carried out. It is established that the developed method improves the accuracy of determining the contours of objects. Errors of the first and second kind are chosen as quantitative indicators of the accuracy of determining the contours of objects in a typical complex structured color image. Errors of the first and second kind are determined by the criterion of maximum likelihood, which follows from the generalized criterion of minimum average risk. The errors of the first and second kind are estimated when determining the contours of objects in a typical complex structured color image using known methods and the developed method. The well-known methods are the Canny, <em>k</em>-means (<em>k</em>=2), <em>k</em>-means (<em>k</em>=3), Random forest methods. It is established that when using the developed method based on the ant colony optimization algorithm, the errors in determining the contours of objects are reduced on average by 5–13 %.</p>2019-12-30T14:41:42+02:00Copyright (c) 2019 Hennadii Khudov, Igor Ruban, Oleksandr Makoveichuk, Hennady Pevtsov, Vladyslav Khudov, Irina Khizhnyak, Sergii Fryz, Viacheslav Podlipaiev, Yurii Polonskyi, Rostyslav Khudovhttp://eu-jr.eu/engineering/article/view/1105EVALUATION OF THE INTER-REPAIR OPERATION PERIOD OF ELECTRIC SUBMERSIBLE PUMP UNITS2020-01-14T15:19:28+02:00Ibrahim Abulfaz Habibovh.ibo@mail.ruSevinj Malik Abasovaseva-abasova@mail.ru<p>In recent years, in the oil and gas industry of Azerbaijan, the use of electric submersible pumps (SEP) as one of the effective way to increase the level of production of well products. Currently, electric centrifugal pumping units (ECPU) are widely used both on land and in offshore fields. Currently, a total of about 15 % of SOCAR’s oil wells are produced using electric submersible pumping units.</p><p>ECPU effectiveness is largely determined by both the period of their operation and the frequency of repair and restoration work.</p><p>It is established that the use of ECPUs contributes to an increase in the service life of equipment and the effectiveness of a mechanized method of oil production. To assess the benefits of the latter, the most important factor is the inter-repair period (<em>T<sub>ir</sub></em>) of the equipment.</p><p>Existing methods for determining the inter-repair period of oilfield equipment are accompanied by large errors, which significantly reduce their reliability.</p>In this regard, the article is tasked with developing a more practical and reliable method for determining the inter-repair period, where the point of change in the nature of the failure rate is adopted as the determining parameter2019-12-30T14:39:57+02:00Copyright (c) 2019 Ibrahim Abulfaz Habibov, Sevinj Malik Abasova