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Vol 6, No 4 (2019)

Articles

AUTOMATION OF DESIGN PROCESSES WHEN CREATING AND OPERATING SPECIAL CARS

Kuklina I.G.

Abstract

The fundamental task of the modern engineer-creator of specialized automotive equipment (the study examines cross- country vehicles and equipment for the construction and maintenance of roads) is a competent and high-performance application of modern information technologies, as noted in the Government Decree of 2014 [1, p. 6, 15]. The author of the article proposed a structured set of application of object-oriented information methodologies for solving problems of calculation and visualization when creating highly reliable vehicles equipped with long screw rotors [2, p. 20]. The methodologies of automation and computerization of design processes in calculating the dynamics of a machine [3, p. 87] (the creation of a competent design of vibration damping [5, p. 49] in automotive vehicles is one of the most important tasks of car builders) were considered and proposed at the end of the last and the beginning of the modern century by leading foreign and Russian authors [4, p. 53].Snow and swamp vehicles - so often called rotor-screw machines are equipped with long screw rotors [6, p. 23], the use of which significantly increases the cross-country ability of the machine [7, p. 135], but also increases the vibrational loads on the operator and passengers of the all-terrain vehicle. The creation of a methodology for calculating the oscillatory processes of these machines is devoted to the works of famous scientists of Russia [10, p. 238]. The proposed surveys are devoted to the use of modern information technologies to increase the speed and quality characteristics of calculation processes when creating comfortable and reliable special vehicles with rotary thrusters. Calculation programs are accompanied by video playback of machine units.The article proposes an original object-oriented system for studying dynamic vibration loading of machines with linear contact between the supporting surface and the propulsion. It is the uniqueness of rotor-screw machines that creates difficult conditions for the design engineers of these machines. Automation of complex calculations of the oscillatory system of these machines is an important task for Russian designers.
Computational nanotechnology. 2019;6(4):9-17
pages 9-17 views

MANAGEMENT OF VALUE-ADDED REPRODUCTION CHAINS IN PRODUCTION SYSTEMS BASED ON A COGNITIVE APPROACH

Abdikeev N.M., Losev A.A.

Abstract

The Concept of competitive value chains in production systems, as an institutional structure operating on network principles, was the impetus for the development of a system of models of inter-industry digital platform for the management and optimization of cooperation of high-tech network production systems. The paper describes the process of working with the cognitive model of decision support in the management of value chains in production systems, the algorithm for constructing a conflict resolution diagram, the ways of integrating it into business processes in interaction with other models, for example, simulation. The practical implementation of the system of such models is a separate software product-an intersectoral digital platform for participants to create new high-tech products and their components.
Computational nanotechnology. 2019;6(4):18-23
pages 18-23 views

THE RAY METHOD FOR SOLVING THE DYNAMICS OF THE ELASTIC-VISCOUS-PLASTIC SHELLS

Egorov M.V.

Abstract

The processes of dynamic deformation of shells are actively studied by both domestic and foreign scientists [4; 11; 13; 14]. The work describes the ray method for solving systems of partial differential equations of hyperbolic type. This method consists in constructing the equations of discontinuity transfer along the propagation of perturbations on moving surfaces, as well as in representing the solution in the form of a Taylor power series in the variable distance behind the perturbation front while preserving a sufficient number of terms. The implementation of the method is shown by the example of a system of partial differential equations of hyperbolic type, which describe the process of dynamic deformation of thin cylindrical shells of revolution from elastoviscoplastic materials [10]. An algorithm for constructing a solution up to the required order is given.
Computational nanotechnology. 2019;6(4):24-28
pages 24-28 views

QUANTILE TRANSFORM IN STRUCTURAL BIOINFORMATICS PROBLEMS

Poluyan S.V., Ershov N.M.

Abstract

In this paper we study features of the multivariate empirical quantum function implementation for which sample is distributed at the mesh points of the regular grid. We present an algorithm for continuous and discrete quantile transform based on recursive definition of the multivariate quantile function. We perform numerical study of the presented algorithm and demonstrate it computational complexity according to representation of the sample. We present the results of using evolutionary optimization algorithm with quantile transform for solving the problems in structural bioinformatics: protein structure prediction from amino acid sequence and protein-peptide docking with known binding site and linear peptide structure.
Computational nanotechnology. 2019;6(4):29-43
pages 29-43 views

PROSPECTS OF APPLICATION OF POLYMER-CERAMIC COMPOSITE IN THE PRODUCTION OF MICROALGAE

Rakhimov R.K., Peter J., Yermakov V.P., Rakhimov M.R.

Abstract

The article is devoted to the consideration of the possibility of using a film-ceramic composite based on functional ceramics and polyethylene film in increasing the efficiency of microalgae production. The main advantages of the composite relative to the traditional method arepresented.
Computational nanotechnology. 2019;6(4):44-48
pages 44-48 views

DETERMINATION OF THE DENSITY VALUE SPECIFICALLY AT THE FOCAL POINT OF THE MIRROR CONCENTRATING SYSTEM

Sobirov Y.B., Rakhimov R.K., Abdurakhmanov S.A.

Abstract

When designing mirror concentrating systems, it is necessary to determine in advance the optical-geometric and optical-energy characteristics of the installation. One is required to choose the mirrors with a reflection coefficient to satisfy the expected energy distribution in the focal area and to pay attention to the accuracy of the reflective surfaces of the mirrors, to the accuracy of the tracking system of the heliostats to the trajectory of the apparent motion of the Sun, to the partial shading to the reflective surfaces, etc. Based on these data, it is necessary to calculate the irradiance distribution in the focal zone of the installation. During installation and utilization of the equipment it is necessary to measure and monitor these parameters and, if necessary, to recalculate the energy distribution taking into account the new parameters.The methods for calculating the density distribution of the radiant flux in the focal zone of mirror-concentrating systems have been developed in parallel with the requirements of exploitation. They do not always correctly reflect the true picture formed in the focus of the heliostat. In this paper, the analysis presents the existing methods for calculating paraboloid concentrators based on the Gaussian distribution of energy in the focal plane. Developing the method of fallen and reflected elementary cone beam and on the basis of generated scattered optical images of the Sun and of the visible angular size (2γо = 32 angle of minutes) of the Sun, which shows non-Gaussian nature of the resulting distribution in the focal plane due to the influence of aberration of the optical paraboloidal surface depending on the change of the aperture angle 2U, we obtained an analytical calculation formula to determine the value of the concentrated radiant flux specifically at the focal point of a paraboloid mirror concentrating system.
Computational nanotechnology. 2019;6(4):49-55
pages 49-55 views

DEVELOPMENT OF MEMBRANE-ELECTRODE ASSEMBLIES PROTOTYPES BASED PLATINUM NANOCOMPOSITES FOR ENERGY SOURCES

Lebedeva M.V., Antropov A.P., Ragutkin A.V., Yashtulov N.A.

Abstract

Electrode materials with platinum nanoparticles on combined polymer-carbon matrix-carriers had been formed. Model tests of hydrogen-air fuel cells with varying loading and sizes of platinum nanoparticles had been carried out. It was found that the maximum value of specific power (64 mW/cm2) and current density (122-128 mA/cm2) are achieved when the catalyst load was 0.32 mg/cm2 and the nanoparticle size was 2-4 nm.
Computational nanotechnology. 2019;6(4):56-59
pages 56-59 views

DEVELOPMENT OF ALGORITHM PROCEDURE OF STRATEGY DECISION-MAKING IN A CEMENT INDUSTRY ENTERPRISES

Zaytseva E.V.

Abstract

The problem statement (relevance). The article illustrates the outcome of analytical research in the area of substantiation of organizational and managerial structures of cement companies on the basis of conducting an integral estimation of complex conditions of operation (manufacturability of mining and geological conditions of cement production, level of production and technical conditions and social conditions) and outputs (production and technical level and financial level). Integrated assessment is provided by the appropriate methodology, the purpose of which supports an increase in the objectivity, reliability and reliability of decisions in the development of technological systems of cement enterprises.Purpose: development of an enlarged flowchart of the decision-making procedure algorithm for development strategies for cement enterprises. Methods used: the work used the method of “vector norm”, based on the methodological principles of the theory of complex decision making, utility theory, game theory, qualimetry, expert survey method and other generally accepted methods and principles.Novelty. The elements of novelty include an improved method of integrated assessment of the technological structure of cement enterprises in the conditions of external and internal environments of operation.Result. The article presents an iterative algorithm and decision-making procedure for structurally selected groups of cement enterprises with the choice of a specific form of their development. The results of the work made it possible to form the key areas of training and a list of information technologies that ensure technological readiness for the implementation of the directions of digitalization in relation to cement enterprises.Practical significance: the organizational and management apparatus with the appropriate mathematical reinforcement for the selection and justification of strategies for the development of cement enterprises. The practical implication of the outcome of the study due to the possibility to increase the effectiveness of organizational-technological and managerial solutions based on the developed methodology, technique and algorithm of formation of innovative strategy of development of the mining enterprises of the cement industry. The main provisions of the work are used in the holding “EUROCEMENT” in the development and implementation of plans for the development of industrial production in the short and long term.
Computational nanotechnology. 2019;6(4):60-65
pages 60-65 views

METHODS OF TESTING RING SAMPLES MADE OF PLASTIC COMPOSITE MATERIALS USED IN THE AVIATION INDUSTRY AND THE ESTIMATED EVALUATION OF THEIR EFFECTIVENESS

Polovin M.M., Nazarov E.V., Zhuravlev E.V., Shavelkin D.S.

Abstract

In relation to the increase in the proportion of composite materials used in the design of modern aircraft, the most acute issue is the issue of confirming the characteristics of materials during their testing. In this paper, the methods of testing composite materials used in the elements of the glider design are analyzed, and the estimated assessment of the methods analyzed is made.Within the limits of the given work the comparative analysis of existing and perspective methods of carrying out of tests of ring samples from composite materials for the purpose of an estimation of their efficiency regarding definition of mechanical properties is carried out. The advantages and disadvantages of each method are determined.
Computational nanotechnology. 2019;6(4):66-71
pages 66-71 views

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