Software & Systems

Articles of journal № 3 at 2020 year.

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11. Trajectory modeling space object in range Mathcad discovery complexes [№3 за 2020 год]
Authors: T.V. Kalinin, S.V. Kulikov , D.V. Khrestinin, A.S. Koznev
Visitors: 6599
In the development of near-Earth space had to face an ever-increasing danger caused by the increase in the number of space debris objects. In view of this, one of the problems of radar and optoelectronic means (NES) for monitoring near-Earth space is the prediction of the trajectory movement of such ob-jects. The paper presents the main provisions of the methodology for modeling the trajectory of a space object in the coverage area of a ground-based radio-technical and optical-electronic complex of space-based monitoring of near-Earth space using the Mathcad medium. The paper substantiates a rather ade-quate and at the same time easily implemented in real time way to obtain trajectory data in modeling the near-Earth space environment. The research object is the trajectory of space debris of artificial origin in the area of the complex of detection of changes in the environment of near-Earth space. The study subject is a model of the trajec-tory of an object of space debris of artificial origin (technogenic) as an integral part of the model of de-tection and tracking by active radio-technical and passive optoelectronic complexes for monitoring near-Earth space. The modeling technique of space object flight in the station coverage area is based on an elliptical theory of motion. The parameters of the coverage area and the technical characteristics of the radio complex are determined by its purpose. In addition to the elliptical theory of motion, the technique of moving an object in a vision of an op-tical-electronic complex takes into account the technical parameters of the complex and the character-istics of its motion in near-Earth orbit. The main result of the study is the proposed modeling techniques that allow, using the limited com-putational and graphic capabilities of a computer mathematics system, it is sufficient to adequately simulate the trajectory of a space object in the coverage area of a ground-based radio complex with specified parameters, as well as generate a vector of trajectory measurements in various coordinate systems, in including passive means of the optoelectronic location. The directions of further improvement of the methods are taking into account disturbing factors act-ing on the space object during its movement, as well as modeling the processes of processing trajectory measurements of maneuvering space objects with various hypotheses about the nature of the accelera-tion of motion.

12. A review of dynamic vehicle routing problems [№3 за 2020 год]
Authors: V.N. Kubil , Chernyshev Yu.O.
Visitors: 3053
Vehicle routing problems are strategic point to the optimization of logistics processes and for more than half a century have attracted wide attention of researchers due to their complexity and practical significance. This paper focuses on a relatively new area of research on dynamic vehicle routing prob-lems. The authors give prerequisites for its formation, associated with globalization and the develop-ment of information and communication technologies. A brief history of this sub-class of problems is presented, with references to the works of authors who have contributed significantly to its research. The principal differences between the dynamic ve-hicle routing problems and their static counterparts are shown. As examples of a practical application there are considered sales sphere, emergency rescue and repair service companies, courier services, transport ordering systems, emergency services and taxi services. There is a review of varieties of de-terministic and non-deterministic problems in the paper. Among the main dynamic parameters of the problems, there are considered the requests for export and delivery, the query time, the quantity of demand, the travel time of the vehicle, and others. The main approaches to solving dynamic vehicle routing problems are considered and the most popular methods and algorithms are specified, including tabu search, variable neighborhood search, insertion methods, nearest neighbor search, column generation, genetic algorithms, ant colony optimization and particle swarm optimization. The conclusion is the current trends of research in this area, related to the formulation of complex variants of dynamic vehicle routing problem and the development of effective methods of global opti-mization to solve them.

13. Parallel processes and programs: models, languages, implementation in systems [№3 за 2020 год]
Authors: Kutepov V.P., A.A. Efanov
Visitors: 5658
The authors propose models and languages of parallel processes and programs, which have wider pos-sibilities for describing parallelism in comparison with well-known models and languages created for this purpose. The concept of an actor, the execution of acts, and the interaction of actors in the performance of a process are the basic elements of a process description. The general form of defining a process is a set of recursive equations, the right parts of which are groups of actors, which interact during the process execution. The graphic and textual form of the description of processes and the principle of initializing the execution of an act by the readiness of the signals (data) arriving at the inputs of the corresponding actor from the actors influencing it creates the necessary conditions for an effective description of the processes, their analysis, modification, and parallel execution. The interpretation of process actors as procedures provides a direct transition from the process language to the high-level language of modular multi-flow parallel programming. The paper considers the main implementation problems of the proposed languages on computer sys-tems: the unambiguous naming of the acts generated during the interaction of the process, the organiza-tion of process control on computer systems. It is known that classical algebraic models of processes belong to R. Milner and C. Hoar. In this pa-per, we consider a more general model and language of processes, which, on the one hand, makes it possible to describe groups of interacting processes when the general process is defined in the form of a system of process equations. On the other hand, a dynamically generated structural description of cause-and-effect relationships between process actors in groups and the use of an actor’s activation mechanism upon receipt of the necessary signals (data) to its respective inputs provide, without limita-tion, the implementation of parallelism and asynchrony when performing process acts. The use of vari-ables in the system of equations describing the process creates the conditions for the dynamic genera-tion of process groups. The model described in the article is the basis for creating a parallel programming language imple-mented on computer systems.

14. Special features of SDN technology by Cisco Systems [№3 за 2020 год]
Author: Yu.M. Lisetskiy
Visitors: 7661
The paper is devoted to software-defined networks currently dominating over traditional networks, which management and automation tools do not meet requirements of modern dynamic changes to con-figuration and scaling as well as virtualization. Distributed management concept where all the logic component of network operation is spread over network equipment is no more efficient enough. This is the reason for the emergence of a new concept and technology SDN (Software-defined Networking) – a network in which the management level is separated from the data transfer level and implemented pro-grammatically. Thus, in accordance with the SDN concept, all network management logic must be re-moved from network devices and implemented on a separate server – the SDN controller. The paper considers SDN technologies of Cisco Systems company, their development, and features. An important difference between these technologies is that they do not meet the basic principle of SDN, which is a separation of control and data planes. Such Cisco technologies as ACI and SD-Access preserve significant control plane functionality in the network devices and expand it with additional features. The basis for these technologies is the overlay networks or logical topology for the virtual connection of devices, which is built over arbitrary underlay topology. SD-WAN is a new Cisco WAN technology, which resulted from the application of SDN concept to distributed networks. Data plane of SD-WAN is the Internet overlay, working via the Internet. In ac-cordance with SDN concept, the SD-WAN, unlike SD-ACCESS, keeps control plane and data plane de-coupled and control plane functionality implemented in separate specialized devices. Having changed the ideology of implementation of enterprise networks Cisco has introduced DNA which is a new net-work concept enabling different services from the Cisco cloud.

15. Software for identification and correction of non-standard errors of measuring instruments in the process of induction soldering [№3 за 2020 год]
Authors: A.V. Milov , Tynchenko V.S., Murygin, A.V.
Visitors: 4390
The paper presents the development of a software module for the identification and correction of non-standard er-rors in the process of induction soldering of spacecraft’s waveguide paths. The paper analyzes the features of the technological process of induction soldering of thin-walled aluminum waveguide paths of spacecraft. Based on this analysis, the authors concluded that it is appropriate to use intelligent methods to identify and correct non-standard errors of measurement tools in the process of induction soldering. The authors also concluded that the chosen method of identifying non-normative errors as a software module for the existing control system for in-duction soldering of spacecraft waveguide paths. The developed module allows us to configure the initial parameters to create and train an artificial neural net-work used to solve the problem of non-standard measurement error correction in the process of induction solder-ing. The module allows us to configure the artificial neural network in terms of activation functions, hidden layers number, artificial neuron number on the layer, and training duration. The resulting neural network model can be uploaded to disk for use in the induction soldering automated control system. The module also implements the functional of generating a control action for the correction of non-standard errors. Using the module allows us to improve the quality of the induction soldering process control by reducing the influence of errors on the course of this process. The software product is an application for the Windows operating system that is compatible with versions of Windows XP/7/8/8.1/10. The application was developed using the Python programming language and the PyQt5 framework. Data from actual technological processes were the basis for checking the effectiveness of the proposed software module The test results showed high efficiency of identification and correction of non-standard errors in the process of induction soldering.

16. Support vector method modification development for solving the classification problem with domain restrictions [№3 за 2020 год]
Authors: Mikhailov I.S., Zayar Aung , Ye Thu Aung
Visitors: 8621
One of the data mining methods for solving the classification problem is the support vector machine (SVM). The method’s main idea is to translate the source vectors into a higher-dimensional space using the kernel method to ensure the linear separability of classes and to find a separating hyperplane with the maximum margin between the hyperplane and the reference vectors in this space. Despite the high accuracy of the method, it also has disadvantages. These include the lack of a gen-eral approach to automatic kernel selection, as well as the high computational complexity of the meth-od. In this regard, the authors developed a modification of the support vector algorithm (FS-SVM algo-rithm) to solve the classification problem with restrictions on the problem domain. The authors formu-lated the classes "functional separability" restriction, imposed on the problem domain. It will allow ap-plying the FS-SVM algorithm. There is a theoretical study of these assumptions validity in the paper. The paper introduces formal definitions of "functional separability" based on the separating func-tion continuity and monotony and on the basis of the derivative of discriminant function. The authors show a "functional separability" concepts and classes convexity comparison. The proposed FS-SVM algorithm main blocks are considered in the paper: the search for support el-ements, the separating hypersurface points determination, the separating hypersurface construction as a piecewise-linear function in projection onto the coordinate axes under consideration. In further algo-rithm development, this function is proposed to be approximated by the Chebyshev polynomial to ob-tain a smooth curve. The paper presents as an example of a problem domain, in which the FS-SVM algorithm can be ap-plied, the oil-water-gas flow regimes classification problem, based on initial data obtained at the oil well mouth.

17. Development of a problem-oriented system for managing the process parameters of an underground well uranium leaching mine [№3 за 2020 год]
Author: D.R. Podrezov
Visitors: 3549
The management information system is designed to make timely, effective, and well-grounded man-agement decisions in the field of operational and tactical production planning. The problem-oriented management system is based on the productive-economic model of the operation of an enterprise. The main model function is to calculate the production and economic indicators of the enterprise's func-tioning under a given amount of resource expenditure during the implementation of the production program under various scenarios of the development of environmental factors. The prime purpose of the system is to model the enterprise activity and search for a set of economic, production, and techno-logical indicators to achieve production program goals. The purpose of the work is to create a problem-oriented system for managing indicators of techno-logical processes of an underground well leaching mine for implementing information and analytical support of procedures and processes that allow to quickly analyze, model, predict and visualize vari-ous scenarios for the implementation of business processes and the production program of the enter-prise. The study is novel in that it is possible to implement a procedure for modeling performance indica-tors and evaluating reserves of technological blocks of an underground borehole uranium leaching mine in order to determine the resource potential of the Deposit as a whole, based on the analysis of the dynamics of basic technical and economic indicators and scenario conditions for the development of business processes of the enterprise. The system use will make it possible to create targets for the enterprise operation with different planning horizons. For the purposes of operational and tactical production planning, a budget is calcu-lated for material resources, and a portfolio of projects for the production program and consolidation reporting forms are formed according to external environmental development scenarios. The developed procedures make it possible to implement the production planning directly functions on mine individual technological blocks and to form optimal production programs for the technological polygon development as a whole on the basis of the opened reserves obtained model versions and the formed conditions and restrictions system.

18. The simulation program for thermophysical processes in ore-thermal furnaces when changing the control actions [№3 за 2020 год]
Authors: A.Yu. Puchkov , S.V. Panchenko , M.V. Chernovalova
Visitors: 3007
The authors developed an algorithm and software for modeling the thermophysical processes of the re-actor zone of an ore-thermal furnace in response to changes in control actions. The algorithm is based on two mathematical models that use a hydrodynamic approach to describe the sludge formation in electrothermal processes of the processing of pelleting products of roast machines in ore-thermal fur-naces. The first model describes thermophysical processes and represents the stoichiometry of the re-sponse components and the non-steady states of a phosphoric ore-thermal furnace during the pro-cessing of pelletized industrial waste in the approximation of lumped parameters. The second model describes the sludge formation process and characterizes the particle entrainment. These particles are a source of sludge contaminants of phosphorus at the furnace outlet. The model is based on the fact that the dusting key factor is the melt drip entrainment by bubbling gas. The considered furnaces are used in a multistage process for producing yellow phosphorus from the waste of apatite-nepheline ores, which gather in large quantities in the dumps of mining-and-processing integrated works. Representing industrial deposits of mineral wealth, such dumps need to be recycled, since, in addition to the relatively rich chemical composition, which also needs to be used, they have an appreciable loss to the environment and human health. Therefore, the technological system devel-opment for waste disposal and the software creation that simulates the processes in such systems with the aim of their comprehensive optimization is a relevant research problem. The software for modeling the thermophysical processes of the reactor zone of the ore reduction furnace will be further used as an integral part of the software complex, whose problem is to calculate the optimal (energy-efficient) modes of the technological system, including granulators, conveyor-type calciners, and ore-thermal furnaces in order to ensure environmentally friendly processing apatite-nepheline ore waste.

19. Automation of calculation of the tool of final drawing with thinning of whole-drawn cylindrical products [№3 за 2020 год]
Authors: A.I. Sergeev , Shegolev A.V., Serdyuk A.I., M.V. Ivanyuk , A.V. Kuzmin
Visitors: 3336
Modern high-tech press production refers to the high-tech area, which causes a number of features that determine the specifics of the processes of metal flow in the processing of pressure without heating. One of the complex processes is a deep drawing with thinning, which performs the basic forming op-eration of converting a thick-walled cylindrical semi-finished product of the "cup" type with a blind bottom part into a thin-walled one. Errors in the calculations can occur only on the final drawing with thinning, which leads to additional labor costs for re-design, tool manufacturing, and production of a new batch of products. As a result, the cost of the product is significantly increased. Based on the stat-ed automation of calculation of tool geometrical parameters of the final drawing with thinning of the whole-drawn cylindrical products is actual. The paper describes the design problems of the final drawing tool with thinning in the manufacture of whole-drawn cylindrical products. The authors present three main types of whole-drawn cylindrical products with different internal geometry. The paper describes the developed UML diagram of the pro-cess of calculating the final drawing tool with thinning. The features of calculating the punch profile, depending on its geometrical parameters and the type of the axial section, taking into account the spring-back of matrices in the process of manufacturing products, the manufacturing tolerance and wear of the matrix and punch, the tolerance on different-wall, the tolerance on the wall thickness of semi-finished products, the allowance under mechanical processing. The authors give the screen form with the output of the calculation results of the final drawing tool with thinning. The calculation results obtained with high accuracy allow us to minimize the number of errors and they are the input data for the module of automatic construction of three-dimensional mod-els and drawings of punches and matrices in the computer-aided design COMPASS-3D through the use of an application software interface.

20. Automated control module for a production process monitoring system [№3 за 2020 год]
Authors: Solomakha, G.M., Khizhnyak, S.V.
Visitors: 4761
The paper presents the architecture, tools, and technologies used in the implementation of the automat-ed control module of the monitoring system for production processes, which provides the ability to au-tomatically and manually adjust the operating mode of the equipment. The module provides the ability to control geographically distributed production infrastructure remotely manually or automatically. The components of the module, the protocol, and the order of their negotiation, the method, and format of data transfer are oriented to use both in geographically distributed and concentrated industries. The paper substantiates the feasibility of developing the module. The paper describes the require-ments for the module formed during the research, which are necessary to solve the problem set for the module, in particular, the possibility of remote automated and manual control, control from the maxi-mum number of platforms, integration with third-party systems. The paper describes ways to achieve the former requirements. The authors present the main subsystems and components, describe their pur-pose, functions, and principles of operation, give the format and method of data transfer between the module components, as well as the method of storing them. The authors use JSON as the data representation format. WebSocket transmits data. Integrated han-dlers in JavaScript perform data processing. Rhino JavaScript Engine provides the interpretation of these handlers. The module implementation language is Kotlin. The event model is used as a model for data exchange between module components. The authors provide the module architecture diagram and name its components. Based on the results of their research, they draw conclusions. The designed architecture provides a high degree of mobility and allows management in the condi-tions of the geographical distribution of production. When used as part of a production process moni-toring system, it provides a high degree of flexibility and scalability.

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