Summary: The analysis of the results of the static tests of the copper ring is immersed in liquid and exposed to the influence of external sound radiation. Reveals the nature of formation in the liquid the concentration of sound waves in a surface caustics. Explains the causes of the concentration of sound waves and the emergence of global and local moving fluid flows. Analyzes the energy status of the liquid inside the limited ring space with different directions of action of the sound beam with flat front.
Keywords: caustic, aberela, wave size, the concentration of the sound waves driving the flow, diffraction.
Summary: In the article the necessity of information support Ukraine's agricultural sector; designed a new automated information system for the agricultural sector.
Keywords: information systems design, DSS, computer technologies, automated information systems.
Summary: Covering main problems and managing their solving methods on the base on creating the hybrid recommender system with using the data about user media preferences.
Key words: Recommender system, recommendation system, algorithms, media, SVD.
Summary: One of the major problems of management and economy is the lack of benchmarks that provide the possibility of an adequate assessment system operations to select the best of them. The paper discusses the approaches used by the authors to develop evaluation criteria.
Key words: performance indicator, the cybernetic model, operational approach, criterion of efficiency.
Summary: The duration of transient process of change in volume flow in oil pipeline by startup of pumping unit in oil pumping station (OPS) was determined with the help of processed industrial data after experiments carried out on the working oil pipeline. For each of the three stages of the transient process were built polynomial models in change of volume flow of oil at the time on the OPS where was launched pumping unit of OM series. It was found out, that the actual value of abruptly changing volume flow of oil on the distance to the origin of the disturbance can be reliably described by an exponential function.
Keywords: unstable hydrodynamic process, pressure wave, the speed of propagation of pressure, volume flow wave damping factor, an abrupt volume flow change.
Summary: The article is devoted to the study of the bearing capacity of thin-walled elements of designs at creep. In this case the ambient temperature and the pressure on the rod assumed to be constant, that is not changing in the time. At the end of the article shows the formula to determine the allowable stress on the rod at a corrosion and creep.
Key words: corrosion, thin-walled rod, creep, cylinder, load bearing capacity.
Аннотация: Цель данной работы - рассмотреть алгоритм расчета балки на основе математической модели с учетом физической нелинейности.
Ключевые слова: изгиб, физическая нелинейность, балка.
Summary. The investigations pertain to the field of applied mechanics and address the effect of acoustic pressure waves on underwater vehicle during its start. The differential equation of motion of an underwater object is given in a simplified form. We analyze the case of forced motion of an underwater vehicle of arbitrary shape during its translational and angular motion in three axes.
Keywords: moving, liquid, acoustic pressure wave, underwater vehicle.
Summary. Nature of origin of additional errors opens up at the pickoffs of gyrostabilized platform in the acoustic fields. The analytical ground of degree of influence of penetrable acoustic radiation is built on resiliently deformed consisting of podvesa of gyroscope of the mode of the operating use of aircrafts.
Keywords: float gyroscope, wave coincidence, shpangout, wavefront.
Summary. We propose to apply the two-stage cluster approach for the investigation of the dynamics in emissions of the most common pollutants into the atmosphere in Lviv region. The mathematical model was described. The implementation of the proposed approach was performed in the Matlab 7.10.0 environment and the results were presented.
Кеу words: clustering, k-means algorithm, Kohonen’s self-organizing maps, the atmosphere air, emissions of pollutants.
Actual problems of modern science: Abstracts of XІІ International scientific-practical conference (Moscow - Astana - Kharkiv - Vienna, October 28, 2016)
Summary: The article is dedicated to the research of biotechnical systems. The selected method of study takes into consideration in what extend the viewed bio objects being objectively evaluated. It is proposed to use optimal control method for this purpose. Once the parameters of biotechnical system are determined, the most effective control is being ensured which maximizes optimization criteria. Depending on the nature of admissible multitude the problems of mathematical programming are being solved. The results of findings are being analysed.
Keywords: bio-objects; biotechnical system; optimal system; optimal control.
Annotation: The article, based on an analysis of existing light sources used in industrial, civil and residential buildings, the study shows the noise characteristics and the electromagnetic radiation of low pressure fluorescent lamps.
Key words: light, fluorescent lamp, lighting, the frequency spectrum of the radiation, noise, electromagnetic radiation measurement range.
Abstract. In this article the Ukrainian market of online retail, problems and prospects. The analysis of options for ordering fulfilment centers or retail outlets. Built close to optimal heuristic model for processing large amounts of client orders to minimize the total number of shipments. Investigated the feasibility of these models for seasonal and irregular online stores. Based on the research presented possible potential savings by solving heuristic algorithms of multiple data requests from a large online store. Demonstrated better results by using them.
Keywords: e-commerce, website, online store, heuristic approach.
Summary: The article presents the program scripts written using Scapy network utility designed to test computer networks and conduct cyber attacks to further their prevention.
Key words: Computer networks, information security, testing, Python, Scapy.
Summary. The article deals with rational way of determining the oblique compressed reinforced concrete elements deflection, based on the direct use of curvature function of the generalized phase diagram.
Keywords: reinforced concrete, oblique compression, elements, structures, deformation, stiffness, curvature, deflections.
Summary: In the paper modern playpens constructions, which is designed to create a specific skills or abilities in childhood, are analyzed. Established presence and degree of influence of Coriolis acceleration on the formation sided driving ability of upper and lower extremities during the development of children. The construction of playpen, which provides a full and harmonious development of the child, is purposed.
Keywords: playpen, Coriolis acceleration, left-handed, right-hand limbs, Coriolis force of inertia.
Summary. The paper presents the results of research of the activities of organizational and technological factors on the duration of the installation in concrete chemical anchors with acrylic compositions.
Keywords: anchor, acrylic composition, factor, imitating model, expert assessment.
Summary: Covering modern problems of hacker attacks on web applications. Giving detailed description of such attacks as dangerous redirections and links, attacks related on the user sessions manipulations and SQL injections. Examples include implementation on such programming languages as Java, PHP, C# and Ruby.
Key words: Internet network, hacker, application security, software, browser, host dangerous redirect, links, SQL injection, database.
Summary: At present, the possibility of improving the efficiency of production of enterprises automation of technological processes practically exhausted. Future prospects of modern enterprises connected with the development of intelligent automatic systems of the new generation. The basis of these systems is a new concept of automation of management processes.
Key words: automation of control, automation of control processes, possibilities of automatic control.
