### DETERMINATION OF THE HYDRAULIC CHARACTERISTICS OF PDC BITS AND THEIR EFFECT ON DRILLING PERFORMANCE IN CARBONATE AND TERRIGENOUS ROCKS OF EASTERN SIBERIA

The article presents calculations of the hydraulic power of the bit, draw-down, solution flow rate from the bit nozzles, the reactive force acting on the bottom of hydrodynamic jets from PDC bit nozzles in carbonate and terrigenous sections of the Siberian platform. B.I.Mittleman’s reference was used for calculations, and the paper shows how to perform the calculation using field and reference data. Graphic dependences of drilling indices on drilling parameters are given. The technique of carrying out basic slottings to obtain the best drilling conditions and the corresponding drilling indicators are also given. The maximum bit run speed in each slotting is the criterion for drilling bits. PDC bits should be processed to achieve the maximum value of the bit run speed for spudding drilling, which will ensure the minimum time for drilling a well.

Read More### APPLICATION OF A MATURITY MODEL TO ACTION AGAINST INTERNALTHREATS TO INFORMATION SECURITY

Capability Maturity Models (CMMI) are used to gradually improve various processes in organizations. Maturity levels are described from the initial level with the processes of acting against insiders in an organization are not controlled and occur randomly to an optimized level where processes are measured and controlled. The above characteristics of maturity levels allow classifying the organization’s ability to identify internal threats to information security and to act against them.

Read More### CALCULATION OF TECHNOLOGICAL PARAMETERS OF BUTYL RUBBER POLYMERIZATION PROCESS IN CURRENT MODE

This paper describes the mathematical model for calculating the key technological parameters of the polymerization process in the production of butyl rubber in PJSC «Nizhnekamskneftekhim» the theoretical basis of this process is the material balance equations of the “Polymerizer – the first stage degasifier” systems. Based on the simulation, we developed the algorithm for calculating the parameters of butyl rubber synthesis (polymer mass, process conversion, index, calcium stearate concentration in a polymer) in a real-time mode in a distributed system of butyl rubber polymerization process automated control.

Read More### MODERN TRENDS OF DESIGNING STAIRCASE AND ELEVATOR SECTIONS OF HIGH-RISE BUILDINGS

A large number of regulatory and other sources is devoted to the basic principles of the organization and design of staircase and elevator sections of high-rise buildings. In addition, it was found that one of the factors limiting the height of residential and public buildings is the capacity of the elevator system and the area required for the organization of the staircase-elevator section. The article is devoted to current trends in the transformation of elevator systems in high-rise buildings.

Read More### SIMULATION OF THE MOTION OF BALLS IN A PLANETARY MILL USING SOLIDWORKS

To understand the thermodynamic aspect of processes during mechanoactivation processing, the energy release in mills of various types is estimated. Simulation of the motion of balls of a mill and estimating the generation of energy in a system of balls is a time-consuming task, often described by a system of more than a dozen equations. The computerization of solving such a task sometimes requires specialized programs and large computer capacities. The paper shows how using the Solidworks software package you can simulate the movement of balls in a planetary mill. According to the simulation results, the optimal composition of ball sizes was determined and the energy release in the system of balls was estimated.

Read More### ANALYSIS OF STATISTICAL DATA OF MAN-INDUCED IMPACT OF OAO “MURMANSK FISHING PORT” FOR THE PERIOD OF 2011-2017

The article presents the results of the statistical analysis of the activities of the OAO Murmansk Sea Fishing Port for the period from 2011 to 2017. In particular, the official data on wastes and emissions of pollutants into the environment as a result of the enterprise’s activity were analyzed. At the same time, the environmental protection program of the enterprise OAO Murmansk Sea Fishing Port was studied with regard to the man-induced impact. It is revealed that atmospheric emissions from stationary sources do not exceed the standards for most of the ingredients. The wastewater of the enterprise is discharged without treatment or insufficiently treated in a percentage of 60:40, respectively, which requires the replacement (reconstruction) of the treatment facility. 15 types of pollutants are formed from all sources of wastewater discharges. In general, by the nature of production activities, the enterprise belongs to potentially environmentally hazardous facilities and needs to be modernized.

Read More### MODEL CHARACTERISTICS OF MAGNETIC SYSTEMS OF MEASURING DEVICES AND STUDIED SAMPLES

The authors conducted computer simulations (in the COMSOL Multiphysics 5.3 software environment) of magnetic systems of measuring devices such as “multi-section elongated solenoid with a test sample,” “Faraday magnetometer (pole tips of spherical shape)” to obtain predictive magnetic characteristics of these systems and the samples studied in them. Model field dependences of field induction in solid and granular (filling balls) cylindrical specimens are given for various ratios of the sample length to its diameter, and they are shown to differ from the corresponding limit (experimentally obtained for fairly “long” samples) dependencies. Model coordinate characteristics of the field induction in the interpolar region of the magnetometer are also given for various values of the distance between the poles and the current load; their twisty trend (with an inflection) revealed the presence of gradient stability zones required for placing the sample under study.

Read More### WEBSITES OF MILITARY INSTITUTIONS: GOOD AND BAD SOLUTIONS

The developed toolkit for systematization of open data on military products and defense industry potential is discussed in the paper. In particular, the authors developed the resource that plays the role of a kind of aggregator of this information. In this regard, the content of the existing portals of the Russian and US military departments is reviewed; their advantages and disadvantages are analyzed, the values of a number of webometric indicators are given as well.

Read More### USE OF ROBOTICS IN AIC

The article considers the area of use of robotic tools as modern achievements in agro-industrial sector, suggests the main areas of their use and they include: agricultural production, processing of agricultural products, as well as production of goods for agriculture. Examples of the use of robotic tools in such industries as crop production, animal husbandry, fodder production, etc. are given. The leading role of information-measuring equipment is emphasized when using robotic tools: automatic stations, remote sensors, agronomist’s electronic programs, electronic process charts, etc. The directions for the most efficient use of robotic tools are selected, their indisputable advantages are highlighted in comparison with the technical means used: weight reduction and dimensions of the technique due to the improvement of design, expansion of scope of application due to the possibility of re-programming reduction of time intervals in the production process, accuracy and quality of performance. Areas of research, design, training of specialists in the areas of technology development using robotic tools and “smart” mmachines, as well as the improvement of precision farming and animal husbandry technologies are priotarized.

Read More### ALGORITHM FOR PERSONAL IDENTIFICATION BASED ON VOICE FOR INFORMATION ACCESS AUTHORIZATION

The authors present the algorithm for automating the personal identification process based on a voice. A review of existing methods for solving the problem is presented as well. The method based on the use of a Gaussian mixture model is implemented, it allows to distinguish the voices of people with the highest accuracy since the components of Gaussian mixtures can simulate voice characteristics that are individual for each person. The results of testing the implemented algorithm are given, the conclusion is drawn about the applicability of the Gaussian mixture model for solving the problem of identification by voice.

Read More### STUDY OF THE MAGNETIC FIELD IN THE FRONT GAP OF MAGNETIC FLUIDAL SEALER

The article studies the magnetic field of the front gap of the magnetic fluidal sealer using the finite element method. The distribution of the field strength along the surface of the embankment conducting magnet responsible for the maximum holding capacity of the front gap of the magnetic fluidal sealer is shown. Detailed information was obtained on the nature of the distribution of the field parameters in the gap within the slot pitch, areas of increased magnetic field stress near the slot edges were identified, the shape and size of their boundaries were determined, and the nature of the distribution of stress in these zones was shown.

Read More### JUSTIFYING SUBSEQUENT PICK-UP HARVESTING METHOD FOR GATHERING GRAIN CROPS WITH THE USE OF SWATHER FOR GRAIN MASS

The article presents the material on uneven grain mass in the rolls, in particular, when the yield of grain crops is low. In order to increase the productivity of the combine-harvester when selecting rolls formed by rotary windrower, it is necessary to perform an additional operation to combine three rolls into one powerful unit before the selection and threshing using a special device – swather. The principle of its work is the selection, movement, and laying of the swath of grain mass on the stubble. The method for harvesting grain crops with the use of an additional operation for the laying of the grain mass is described, as well as the device itself, its design features, and the principle of operation of the swather. The agro-technical requirements for the swather are given.

Read More### DEVELOPMENT OF FLOATING SYNTHETIC FILTER DEVICE

The article provides the rationale for an improved design of a floating mobile filtering device with high-quality filtration of river water for the supply of settlements. Membrane fabric of the original structure plays the role of a filter, made of high-strength synthetic materials resistant to rotting and corrosion. Fabric filters provide preliminary mechanical purification of water from suspended particles, phyto- and zooplankton, impermeable to fish, algae and debris. The economic costs of manufacturing, installing and operating the proposed device are significantly lower than those of existing water intakes.

Read More### APPLYING METHODS OF SPATIAL INTERPOLATION TO HYDROLOGICAL DATA ON EXAMPLE OF RECEPTION BASIN OF KARUN RIVER (IRAN)

The authors consider two spatial interpolation methods: the inverse distance method (IDW) and the Kriging method. The mapping of the distribution of the drain coefficient by the above-mentioned methods was made, the actual and interpolated values were compared as well. It was found that the IDW method is suitable for interpolating the values of a sufficiently large number of points located uniformly along the reception basin under consideration; Kriging method allowed to obtain smooth contours of hydrological characteristics that summarize information on the territory.

Read More### RELATIONSHIPS OF PHYSICAL AND MECHANICAL PROPERTIES OF SLIDING SURFACES OF FOREST MACHINES

The goal of this article is to assess the relationship of the deformation modulus, specific adhesion and the angle of internal friction of various types of soils with resistance to sounding. Research methods include the analysis of reference information, computational experiment, an approximation of the calculated data. The following calculated values of the mechanical properties are analyzed: coarse-grained sand, medium-grained sand, fine-grained sand, silty sand, sandy loam, loam and clay soil. It is established that the angle of internal friction and the specific cohesion of sandy soils, sandy loam, loam, and clayey soil are related to the total strain modulus by power dependences. The coefficients included in the formulas depend on the type of soil and, according to the results of processing the calculated data, are invariant concerning the coefficient of porosity and the consistency of soil. It is shown that soil resistance to sounding is related to the modulus of deformation by a power dependence, the coefficients of which are determined by the type of soil, they are invariant concerning its coefficient of porosity and consistency. The obtained calculated values of the cone index agree with the reference data on the resistance to sounding of mixed soils. The dependencies are intended to simplify the procedure for estimating the mechanical properties of the bearing surface since, with a known soil type from the value of the deformation modulus or a tapered index, it becomes possible to calculate the soil parameters characterizing shear resistance.

Read More### MATHEMATICAL MODEL OF THE IMPACT OF THE PROPELLING DEVICE ON THICKENING FOREST SOIL

The goal of the presented article is to develop the mathematical model of the interaction process between a track mover of a machine and a ground, its properties change directly during the interaction. The provisions of the theory of road transport movement under off-road conditions are the basis for the study, and mathematical analysis. The basis of the mathematical model is the interaction scheme between the track mover and the deformable soil massif of limited thickness placed on a rigid non-deformable base. When developing the model, the authors used a power-law dependence of the deformation modulus on the density of the soil, changing under the influence of the mover stamp following the relative compression of the soil mass. The solution of the equation for stamp precipitation is obtained in the form of Taylor polynomials, this allows to obtain the calculated value of the track depth without resorting to iterations, which simplifies the development of automated workplaces designed to estimate the indicators of the interaction of equipment with the cutting areas at the stage of wood harvesting. On the example of the interaction of thrusters of forest machines with weak forest soils it is shown that the calculated values of the depth of the gauge, obtained with the use of proposed mathematical model, differ markedly from the values obtained by calculation at a constant value of the deformation modulus. So, having a pressure within the range of 0.06-0.1 MPa, which is characteristic of the interaction of wheeled movers of forest machines with the ground, the predicted values of the track depth are lower by 30-60%. In conclusion, promising areas for further development are noted, consisting in the study of changes in the physical and mechanical properties of the soil, which characterize the resistance of soils to shear and the development of mathematical models that take into account the loss of bearing capacity of the soil, the calculated value of which also changes during compaction.

Read More### CALCULATING METHOD ANALYSIS OF BIT PROBABILITY OF ERROR AT COGERENT RECEPTION OF SIGNALS WITH M-ARY PHASE MANIPULATION

In modern and promising digital telecommunication systems, signals with M-ary phase shift keying are widely used. The article discusses various methods for calculating the bit error probability for coherent reception of signals with M-ary phase shift keying in the communication channel with constant parameters and additive white Gaussian noise. The calculations of the bit error probability are carried out using exact and approximate formulas. Recommendations on the choice of approximate formulas for estimating the bit probability of error are justified.

Read More### INTRODUCTION OF DIGITAL TECHNOLOGIES IN AGROMONITORING ON EXAMPLE OF EXPERIMENTAL PRODUCTION FARM (EIF) MININO

The experience of introducing digital technologies in the farming in the Krasnoyarsk Territory is described in the paper. On the example of experimental production farm Minino, the authors show the use of the remote ground sounding methods, geoinformation technologies, and geoportal capabilities, a digital model of the EIF Minino was formed, which makes it possible to effectively solve agromonitoring tasks. The access to prepared thematic maps is implemented on the basis of interactive web-mapping tools in a standard Internet browser and through map-based web services for geographic information systems.

Read More### ANALYSIS OF OPTIONS ON IMPROVING DEMINERALIZED WATER GENERATORS BASED ON VOLUME STEAM COMPRESSOR

Distillation desalination plant with mechanical vapor compression is usually equipped with centrifugal compressor as a drive. However, the use of such compressors on high-performance units leads to the need to solve the problem of ensuring high performance at a relatively low frequency of compressor rotation and small dimensions. Therefore, this article analyzes the possibility of replacing a centrifugal steam compressor with a bulk-type compressor, which can potentially reduce the rotational speed (and, therefore, bearing load) of the steam compressor.

Read More### CHOOSING OPTIMAL PREHEATING HEAT EXCHANGERS FOR EVAPORATING UNIT

The distillation desalination plant with mechanical vapor compression consists of several main units, including an evaporator-condenser unit, a steam compressor unit, a heat exchanger preheating unit and a vacuum unit. The purpose of the preheating heat exchanger unit is to bring the source water temperature to a value close to the boiling point. At the same time, for high energy efficiency of the unit, it is necessary for the temperature pressure in these heat exchangers to be minimal, and that leads to large areas of heat exchange surfaces and, consequently, weight and size characteristics. However, the high mass and dimensions adversely affect the mobility of the proposed installation, which leads to the need to minimize these parameters. This article presents a comparative analysis of three types of preheater heat exchangers and the choice of the optimal one as a heat exchanger for preheating a distillation desalination plant.

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