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ENGINEERING

ISSN 2227-6017 (ONLINE), ISSN 2303-9868 (PRINT), DOI: 10.18454/IRJ.2227-6017
ЭЛ № ФС 77 - 80772, 16+

DEVELOPMENT MATHEMATICAL MODEL OF POWER SYSTEM UNDER THE INFLUENCE OF GEO INDUCED CURRENTS

Posted in 2013, ENGINEERING, Issue 12(19) December 2013 | 0 comments

Presents the developed method computer simulation of geo induced currents at geomagnetic storms in power systems. Investigated the influence of geo induced currents at geomagnetic storms on saturation of magnetic system in power transformers.

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INVESTIGATION OF STABILITY OF ALKALINE COMPLEX ELECTROLYTE FOR THE ELECTRODEPOSITION OF LEAD

Posted in 2013, ENGINEERING, Issue 12(19) December 2013 | 0 comments

The possibility of stabilizing of alkaline complex electrolyte is considered in the article through immersion in solution of metallic lead at electrolysis. Both the leaden shaving and cathode spongy lead, formed on cathode, can be used for this effect. Speeds of reactions of formation and reduction of 4-valent plumbum joins in electrolyte are calculated, installed ratio of active surfaces in order to obtain stable anode coating of lead dioxide for a long time.

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ELASTIC AND PLASTIC CHARACTERISTICS OF POWDER MATERIALS AFTER FREE SLUDGE

Posted in 2013, ENGINEERING, Issue 12(19) December 2013 | 0 comments

The problem of nondestructive testing of structural materials on the actual state is highly relevant, as defects and changes in the structure of the material arising when manufacturing and maintenance process can significantly reduce their strength. Mechanical properties of the material are valuable information for the determination of residual resource of details. Moduli of elasticity of – the essential characteristics of a solid body. They are design parameters in the analytical apparatus of physical theory of deformation and fracture of rigid body, are all fundamental equations of mechanics.

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PERSPECTIVES OF SMALL METAL MINING DEVELOMENT IN AZERBAIJAN

Posted in 2013, ENGINEERING, Issue 12(19) December 2013 | 0 comments

The state and perspective of small metal deposits development (mercury, antimony and arsenic) having a commercial value which on the basis of metal it is possible to create manufacturing enterprises. Industrial harnessing of small metal deposits is significantly to improve the state’s economy.

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DEVELOPMENT OF DIGITAL FREQUENCY SYNTHESIZER PLD BASED FOR NQR PULSE FOURIER SPECTROMETER

Posted in 2013, ENGINEERING, Issue 12(19) December 2013 | 0 comments

Frequency synthesizer designed for programmable logic device using the direct digital synthesis signal. The device was tested as a part of sequencer for pulse Fourier spectrometer of nuclear quadrupole resonance. Operating frequency range is 1 ÷ 50 MHz and the minimum duration of the formed pulse – 100 ns.

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RS-485 TECHNOLOGY IN ENERGY CONSERVATION SYSTEM OF HOME AUTOMATION

Posted in 2013, ENGINEERING, Issue 12(19) December 2013 | 0 comments

In this article we discuss the RS-485 technology, which connects all electrical appliances in scrap with sensors and with management controller. In this paper we describe the main features of the application of RS-485 technology to create intelligent automated systems to ensure energy conservation and power management of household electrical appliances in a residential house. The study found that using a standard, RS-485 systems for smart house energy conservation reduces the average power consumption by 40%.

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RAW MATERIALS FOR THE MIXED MAGNESIA BINDINGS

Posted in 2013, ENGINEERING, Issue 12(19) December 2013 | 0 comments

The analytical review of the technology development of magnesia binding is given in the article. The principle of a choice of technogenic materials for the mixed magnesia cement is offered. The list of the input products proved for use in compositions is provided.

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EVALUATION OF THE QUALITY OF WHIPPED BREAD FROM WHOLE-CHICKPEA FLOUR

Posted in 2013, ENGINEERING, Issue 12(19) December 2013 | 0 comments

The article presents the results of a study of quality and nutritional value of whipped bread from whole-chickpea flour. Recommended the use of product designed for mass consumption with the aim of enriching food ration in protein, fiber and micronutrients.

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ANALYSIS OF HEAT SOLAR PLANTS IN A TEMPERATE CONTINENTAL CLIMATE

Posted in 2013, ENGINEERING, Issue 12(19) December 2013 | 0 comments

In the article the analysis of solar plants in the temperate continental climate in the spring and fall seasons. The estimation of the efficiency of renewable energy based on thermal solar plants that are operating in the Central Black Earth area. Attention is paid to the temperature change of main technological parameters at different times of day, which directly affects the level of energy efficiency.

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CURRENT TRENDS AND PROMOTION OF LINUX OPERATION SYSTEM

Posted in 2013, ENGINEERING, Issue 12(19) December 2013 | 0 comments

This article presents an analysis of growing dynamics for demand on Linux from 2010 to 2013. The main factors influencing the process are explained. Also the article describes basic advantages and disadvantages of the Linux operating system in terms of recent trends.

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PHASED ARRAY AND MIMO RADAR: CHARACTERISTICS OF PHASE ARRAY AND MIMO RADAR

Posted in 2021, ENGINEERING, Issue №3 (105) March 2021 | 0 comments

In this article, we propose a new technique for a multiple-input multiple-output (MIMO) radar system with antennas that we call MIMO radar. The new technology has the advantages of MIMO radar without losing the main advantage. Phased array radar can operate sequentially on the transmit side. The essence of the proposed method is to split the transmitting array into several subarrays that can overlap. Each subarray is then used to coherently transmit a waveform that is orthogonal to the signals transmitted by the other subarrays. The sequential processing can be augmented by developing a weight vector for each subarray to form a beam in a specific direction in space.

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MOVEMENT OF FIBROUS COMPLEXES IN A DISTRIBUTION CHAMBER IN THE PROCESS OF THEIR AERODYNAMIC REMOVAL

Posted in 2021, ENGINEERING, Issue №3 (105) March 2021 | 0 comments

The movement of a complex of fibers during aerodynamic removal in the distribution chamber of equipment for sorting fibers, their distribution and transportation is considered. Theoretical studies of the aerodynamic removal zone were carried out on the developed equipment for sorting fibers, their distribution and transportation, which resulted in a mathematical model of the movement of fiber complexes in the distribution chamber of the developed equipment. The obtained dependence shows the relationship between the physical and mechanical characteristics of fiber complexes, as well as the geometric and speed parameters of equipment for sorting fibers, their distribution and transportation.

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A MATHEMATICAL MODEL FOR MEASURING THE CONCENTRATION OF NANOPARTICLES IN A LIQUID DURING THEIR SETTLING: CALCULATION RESULTS

Posted in 2021, ENGINEERING, Issue №3 (105) March 2021 | 0 comments

The article presents the results of numerical simulation of particle settling in a solvent (ethyl acetate) and considers a number of special settling cases of two particle types (filler – aluminum oxide and polymer) in a stationary and non-stationary liquid (ethyl acetate). The study investigates the temperature and velocity fields in the liquid depending on different methods of heating the outer boundaries of the region with a solvent. The authors of the study propose the optimal choice of the heating method to ensure a uniform velocity and temperature field in the concentration control window and constructs the dependence of the temperature and the velocity of the ascending flow in the solvent on the temperature difference at the boundaries of the container. A series of calculations of the motion of particles in a nonstationary fluid is made.

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CASCADE METHOD IN PRODUCTION MANAGEMENT

Posted in 2021, ENGINEERING, Issue №3 (105) March 2021 | 0 comments

The main theme of the article is a cascade method in production management. The supposed approach is proposed to be very efficient in long-term technical system management. This method is widely known in many different fields though for production technical preparation was used for the first time. This article highlights its essence, fundamental regularities that lay beyond it, its relevance, and results of approbation in real production. A new regularity that has never been observed earlier was highlighted as well. These regularities can be used for production management in terms of time-cost and can help to provide smart project management. Application of 3D imitation models for decision making verification in production development was observed as well.

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IMPROVING THE EFFICIENCY OF LIGHTWEIGHT AGGREGATE CONCRETE VIA FINE ADDITIVES

Posted in 2021, ENGINEERING, Issue №3 (105) March 2021 | 0 comments

Lightweight aggregate concrete is widely used in construction; however, the requirements for this material continue to grow. Currently, it is necessary to solve the problem of improving the performance properties of lightweight aggregate concrete. At the same time, it is necessary to minimize changes in its production technology and equipment. One of the ways to solve this problem is to use complex additives based on modern chemical and mineral additives. Due to the fact that the manufacturing process utilizes the materials the properties of which are widely varied, it is necessary to evaluate and select the optimal dosages of the additives used. With this goal in mind, the authors conducted a study to assess the effect of the combined use of superplasticizers and active mineral additives in the compositions of light structural concrete on their performance properties. The results allowed for identifying the dependences of the main characteristics of lightweight aggregate concrete on the consumption of additives. The analysis of the obtained results allowed the authors of the article to evaluate the feasibility of using the used additives to increase the efficiency of lightweight aggregate concrete and to develop recommendations for their use in production.

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SOLVING THE PROBLEM OF DETERMINING THE VERTICALITY OF BUILDINGS WITH MODERN TECHNOLOGIES THROUGH THE USE OF A FOUR-SIDED COLUMN

Posted in 2021, ENGINEERING, Issue №3 (105) March 2021 | 0 comments

The current article describes a method for the roll measurement of the structural columns of a monolithic concrete building using a reflectorless electronic total station and proposes a model for approximating the results of geodetic observations for a four-sided column. The measurements were conducted in a given number with uniform intervals along the vertical line. Further, the averaged roll of the surfaces and the total roll of the structure were obtained from these points. Processing and interpretation of geodetic data were performed in the OpenOffice Calc software package. The study compares the results of the proposed method and the traditional method of roll measurement used in civil engineering. The proposed method allows for the increase in the accuracy in determining the size and direction of the roll through multiple measurements in obtaining the final results in an automated mode without increasing the complexity of processing the measurement results.

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DISPOSAL OF DEHYDRATED OIL SLUDGE IN ROAD CONSTRUCTION IN THE REPUBLIC OF KAZAKHSTAN

Posted in 2021, ENGINEERING, Issue №3 (105) March 2021 | 0 comments

In recent years, the question of the possibility of using man-made waste is quite acute. Occupying huge areas, they carry a significant environmental burden on the environment. This is especially noticeable in the industrially developed regions in the Republic of Kazakhstan, this is given close attention. Many of the waste found their application in various industries, mainly in the construction industry. These include slags from ore-dressing plants, spent zeolites from gas processing plants, water softening sludge from thermal power plants, various wastes from oil production and refining. The Orenburg State University and the Scientific – Research and Design Institute of Environmental Problems investigated the possibility of using this type of waste in the technology of sulfur-falto concrete.

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SOLVING THE PROBLEM OF MISSING DATA AND INFORMATION PROCESSING WHEN CONDUCTING EXPERIMENTAL RESEARCH IN COMPLEX SOCIOECONOMIC SYSTEMS

Posted in 2021, ENGINEERING, Issue №3 (105) March 2021 | 0 comments

The current article deals with the problems of missing data when conducting experimental research in socioeconomic systems. It is common knowledge that there are many methods and techniques for solving the problems of missing data; however, for some socioeconomic systems, this issue still remains open due to the nature of their function and some aspects of technological processes. One of such systems is the penal system. Particular difficulties in collecting and processing information in this area are observed among suspects, accused, and convicted persons. The problems of conducting research in relation to them are complicated by their anti-social behavior and the influence of criminal subculture. Therefore, the article examines and develops a number of methodological recommendations (which are based on system analysis, postulates of classical probability theory, mathematical statistics) to solve the problems of missing data when conducting experimental studies in socioeconomic systems with the penal system serving as the basis of the research.

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DYNAMICS OF THE RADICAL ORIENTED ACTIVITY OF HONEY DURING LONG-TERM STORAGE

Posted in 2021, ENGINEERING, Issue №3 (105) March 2021 | 0 comments

The study of the stability of adaptogenic properties in storing honey as one of the functional nutrients of natural origin is in line with the current strategic trajectories in the field of food engineering. The practical significance of the study is due to the need for scientific justification of shelf life as well as the demand for the methods of establishing the authenticity of food products. The aim of this work is to study the dynamics of the antioxidant or pro-oxidant activity of honey with guaranteed and non-guaranteed quality during long-term storage, taking into account the temperature settings. The objectives of the study include the assessment of the dynamics of the main nutrients and the radical-oriented activity of farm and retail honey samples during long-term storage, taking into account the temperature setting (+20 ° C or +4 ° C). The subjects of the study are samples of honey obtained from farmers in Altai (Shchelkanov apiary) and Krasnoyarsk Krai (Bolshemurtinsky district,” “Starchevskys’ Kochevaya paseka” ; Bogotolsky district, Perov apiary) or purchased in the retail chains of Krasnoyarsk. The research demonstrates that the dynamics of the antioxidant profile is more intense in the retail sample group (a manifold decrease in the content of nutrients and the antioxidant activity of the product) compared to farm products (a decrease by no more than 40%). The “Raznotravny” honey (harvest location: Bogotolsky district of Krasnoyarsk Krai) shows the least resistance to long-term storage in the group of farm products. A common feature of all retail samples during long-term exposure is the inversion of antioxidant activity into pro-oxidant activity. To reduce the risk of metabolic imbalances under the influence of pro-oxidants in honey under long-term exposure, the authors recommend studying the periods of storage while taking into account its antioxidant/pro-oxidant activity, which can be quickly identified via chemiluminescence analysis.

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FUNCTIONAL ASPECTS OF THE C STUD FROM LIGHT STEEL THIN-WALLED STRUCTURES FOR STABILITY

Posted in 2021, ENGINEERING, Issue №3 (105) March 2021 | 0 comments

The article discusses the functional features of thin-walled c studs made of light steel thin-walled structures used for the construction of prefabricated buildings. The study provides a brief description of the theory of stability of thin-walled bars based on the Eulerian bending forms and presents the results of an experimental study on the bearing capacity of light steel thin-walled structure under the influence of static pressure loads. The research presents the dependences of the main pressure loads of the rack shelf on the applied pressure load and the distribution of the field of relative axial strains of the rack wall as a result of processing speckle images in the optical system for analyzing the deformed state, Vic-3D. The study established that the loss of the bearing capacity of the c studs under study differs significantly from the calculated values obtained through the application of the law of plane sections.

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