ISSN 0236-235X (P)
ISSN 2311-2735 (E)

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Higher Attestation Commission (VAK) - К1 quartile
Russian Science Citation Index (RSCI)

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Publication date:
16 June 2024

Articles of journal № 3 at 2018 year.

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Public date | Title | Authors |

11. Methods of developing graphics subsystem drivers [№3 за 2018 год]
Authors: Efremov I.A., Mamrosenko K.A., Reshetnikov V.N.
Visitors: 8993
The paper describes problems of software development for the problems of interaction between systems-on-a-chip (SoC) and the Linux operating system (OS). The OS architecture provides various instruments for creating a driver that is a component allowing the device data exchange using a software interface. The development of drivers for an open source OS is difficult due to continuous changes in functions and a kernel structure. The paper describes graphics subsystem structure and components. The subsystem is a component kit located in different address spaces of OS virtual storage. The components interact through a system call interface. Programming of a graphics engine is performed by filling a command buffer. Each application has a graphics engine context that contains its own command buffer and all necessary data used by the graphics engine for rendering/calculations: coordinates, normal vectors, colors, textures. There are several approaches to setting graphics mode. However, the most reasonable solution is using KMS module (Kernel Mode Setting). Key manufacturers of microprocessors and graphics cards commonly use these modules. It is necessary to ensure the interaction between OS kernel modules and user space through creating own specific system calls. These system calls regulate low-level operations with the device and allow taking full advantage of the graphics unit capabilities. Using FPGA-based prototyping platforms allows verifying software functionality, getting performance characteristics and finding errors in SoC hardware design at early stages. Debugging kernel modules is time-consuming due to limitations imposed both by a prototyping platform and the OS. In addition, the errors in a kernel code are difficult to reproduce, which also complicateы debugging of kernel modules. The paper considers some approaches to implementation of Linux OS KMS module and graphics subsystem components, which provide correct interaction of the OS and the SoC display controller.

12. A nested model of radio-electronic systems for estimation of temporary reliability [№3 за 2018 год]
Authors: S.V. Ignatev, Yu.A. Plaksa, A.V. Krasnikov , А.V. Drozhin
Visitors: 4284
The effective intended application of special-purpose complexes based on radio-electronic systems involves a proper choice of optimal exploitation methods, as well as organization of maintenance, first line repair and supply of the sys- tems with replacement tools and supplies to provide high readiness of the systems for using as intended. For this purpose, there is a system of maintenance with the operating effectiveness depending on the relative position of the radio-electronic systems in a terrain. The essence of the article implies the construction of a nested model of radio-electronic systems designed to develop environment tools allowing to estimate temporary reliability characteristics of the nested radio-electronic systems as well as to undertake the study taking into account a relative position of nest elements and temporary correlation between them. The construction of the nest model has two stages. The first one is the construction of a terrain transport network representing a combination of a graph and a reachability matrix. The approach allows obtaining all possible routes between transport network elements. The second stage includes a description of radio-electronic nest systems by highlighting special type apexes in the transportation network, which include nest radio-electronic systems elements. Then there goes the construction of a spatial and temporary nested model of radio-electronic systems that represens the combination of a graph and reachability sub-matrixes with each route being relevant of temporary features (the route movement time). The spatial and temporary nested model is implemented in C#. It allows calculating temporal reliability indicators taking into account the influence of various factors and estimating the degree of their influence on the availability factor.

13. Input language of a computer-aided system for shaft forging [№3 за 2018 год]
Authors: Kanyukov S.I., Konovalov A.V., Muizemnek O.Yu.
Visitors: 7664
A computer-aided system for shaft press forging design has been created at the Institute of Engineering Science, Ural Branch of the Russian Academy of Sciences. The linguistic support of this system includes a specialized input language for input of initial information and operational adjustments of intermediate and finished results of forging design by users. The input of initial information can be done by two ways: inputting information of a new forged part or reading and adjusting (if necessary) information of a forged part (or a forging), which is already available in a database. The input language part responsible for inputting information of a new forged part provides filling three zones of a corresponding menu. These zones contain general information on the forged part, on the forged part geometry and a design plan. The latter includes a list of tasks to be done in the computer-aided design of forging. Computer-aided design of forging includes the assignment of machining and heat-treatment allowances, addition of various specimens for mechanical testing and macro-control, assignment of forging overlaps, a definition of technical requirements and a simulation of a workpiece working drawing, which consists of seven graphic zones. The input language part responsible for adjusting the workpiece working drawing allows selecting a drawing format (A3 or A4), changing the size of graphic areas with scaling geometric objects and moving them within the drawing field, adjusting numerical and text values of forging parameters inside zones by drop-down menus, controlling the visibility of zones. The described input language of the computer-aided technological design system provides convenient input of initial information about forged parts, ensures obtaining workpiece working drawings suitable for production processes, and greatly facilitates system adaptation to different enterprise conditions.

14. Kvorum – the system for modeling the behavior of robotic agent groups with elements of social organization [№3 за 2018 год]
Authors: V.E. Karpov, M.A. Rovbo, E.E. Ovsyannikova
Visitors: 9685
The paper describes the Kvorum architecture, which is a multi-agent modeling environment designed to develop constructive solutions and algorithms of robot agents’ individual behavior, as well as for modeling behavior of large groups of robots. The main objective of the system is to provide tools for research in applying social organization methods in group robotics. Kvorum is a prototype simulation and agent modeling system that abstracts the complexity of a physical system and provides convenient interfaces and library modules for modeling groups of mobile robots and internal structures of individual agents. It was built as a modular, easily extensible system focused on modeling systems with a large number of agents by simplifying physical and other effects, and also by the ability to perform simulations using parallel computations. It is shown that the proposed method for modeling such systems is applicable to a wide range of problems from the field of group robotics with social structure elements (as well as for common robotics and group robotics problems in general). Some features of architecture and models in Kvorum allow it to be expanded in subsequent iterations to fully support simulation on parallel computing systems. One of the important Kvorum features is the focus on controlling real robotic systems. For this purpose the system provides the same control control interfaces of both computational models and real robots. The system was tested on some specific problems of group robotics, in particular those that use social structure mechanisms, as well as on a group of laboratory robots of different types that support the simulation system interface.

15. The system of statistical analysis and control of hydraulic unit vibration stability [№3 за 2018 год]
Authors: Klyachkin, V.N., Yu.E. Kuvayskova , Ivanova A.V.
Visitors: 4376
The system of vibration monitoring of a hydraulic unit includes indications of a distributed network of relative and absolute vibration intelligent sensors, as well as sensors for measuring the shaft rotation speed. These sensors are designed to work as a part of the hydraulic unit control system. The sensors are combined into one local network to transfer data on vibration parameters to the control system. The network operation mode during stationary operation of the unit can use multivariate statistical control algorithms in order to estimate vibration stability. These algorithms are similar to those used for controlling multiparameter technological processes. Such approach ensures early detection of process abnormalities using statistical methods and timely taking of control actions. Based on the conducted research and result analysis of vibration monitoring of the hydroelectric unit in the Krasnopolanskaya hydroelectric power station, there is a developed software system that provides monitoring of the vibration stability. The system in-cludes three subsystems: for visualization and grouping indicators, as well as for monitoring independent and correlated groups of indicators by stability criteria of the average level and the scattering the corresponding processes. In order to control independent in-dicators, the authors use Shewhart charts for mean values and standard deviations. When controlling correlated indicators, Hotelling charts are used to monitor the mean process level and a generalized variance chart for monitoring multidimensional scattering. The system ensures timely detection of possible abnormalities and prevents overranging of controlled indicators.

16. The effectiveness of stage-by-stage use of securirty means crossing threat detection areas [№3 за 2018 год]
Authors: V.S. Kolomoitsev, V.A. Bogatyrev
Visitors: 5906
The paper investigates the ways of improving the efficiency of a secure access scheme “direct connection”. The scheme is based on choosing options for its construction, taking into account the phased use of various information security means and their integration into a cluster architecture system aimed at consolidating limited protection resources. Consol-idation of protection resources is carried out in order to achieve maximum security with minimum delays and system costs. The authors propose criteria for the effectiveness of information security systems aimed at increasing the probability of threat detection in the shortest time, taking into account its limitations. The proposed criteria take into account the average time of request stay in the system and the probability of threat detection and removal by an information security system. There is an assumption that the service time of each stage is a random value having exponential distribution. The paper proposes models of estimating the probability of detection and elimination of threats and delays based on the sequence of application of information security means in the nodes. The models take into account intersections of sets of threats detected by various means of information security. The authors show the possibility of implementing an adaptive strategy of consistent application of information security means to prevent threats to information security depending on changing intensity of incoming requests. There are some options of bundling nodes by a complete or partial set of available software or hardware-software means of information security.

17. Algorithmic ware of data processing for elastomer composite structuring to solve a control problem [№3 за 2018 год]
Authors: A.S. Kuznetsov, Kornyushko V.F.
Visitors: 5518
Structuring is the most important stage of processing multicomponent elastomeric material into a finished product that is a product with a set of operational properties specified at the stage of recipe building. It is a combination of two processes: chemical interaction of various components in its composition, and the technological process of fixing the re-quired properties and functions of the future product. Successful implementation of this final technological procedure requires strict control over compliance with a given sequence of all technological stages and preparatory operations that leads to production a semi-finished intermediate product. Improving the quality of the finished product is greatly facilitated by applying express-control methods based on vibroreometry to assess the characteristics of raw materials, as well as the parameters of the semi-finished and finished products. The paper considers chemical-technological processes of mixing and structuring multicomponent elastomeric composites as components of a chemical-technological system. The authors propose algorithmic support of vibrereometry data processing to improve management efficiency of complex chemical-technological processes of mixing and structuring multicomponent elastomeric composites. The paper describes the constructed process model for controlling the structuring of elastomeric composite systems. There are 4 groups of processes responsible for quality indicators of structuring. There are also block diagrams of control algorithms for complex chemical-technological processes of mixing and structuring of elastomeric systems. The authors show the methods of processing the main rheometric information using modern software products, as well as the techniques for visualizing rheometric data in Table curve 2d and Table curve 3d. Spatial images are constructed in the form of response surfaces for main recipe-technological factors and process quality indicators. There is also an algorithm for calculating coefficients of mathematical models. A set of composition-property diagrams visually characterizes the effect of changing levels of prescription and technological factors on the kinetics of the structuring process. It is shown that visualization of rheometric data using modern software products provides opportunities for more flexible and adaptive control of the process of structuring multicomponent elastomeric composites.

18. Multi-agent simulation of epidemics' distribution on supercomputers [№3 за 2018 год]
Author: S.Yu. Lapshina
Visitors: 5823
The paper considers the possibility of using modern supercomputers to solve resource-intensive problems of multi-agent simulation of the advance of mass epidemics based on the percolating cluster growth theory. In the problems of determining quarantine zones in advance of epidemics a multi-agent percolation model supposes the formation of an interaction grid of population representatives, modeling of a disease distribution medium, the collection of information on the population size, the implementation of a parallel algorithm for multiple marking of percolating clusters with a tagging mechanism, and result visualization. The article describes an improved variant of the algorithm of multiple marking of Hoshen-Kopelman percolation clusters for a multiprocessor system, as well as a working prototype of its implementation developed at the JSCC RAS (Branch of SRISA). This algorithm can be used in any area as a tool for differentiating large-size lattice clusters, since it has the input in a format that is independent of the application. The paper demonstrates the possibility of revealing the dependencies of latent periods of epidemic spread on the probability of infecting aggregates of population representatives and the formation of threshold values for the transition of local epidemics into large-scale pandemics. After setting a latent period, the chance and the source of infection one can determine the range of cities where infection can be expected. This information is used to determine the radius of a quarantine zone. If a hotbed of disease is found in some city and the latent period has already ended, then this tool might help to determine a zone to be isolated from the outside world. The article also provides estimates of the execution time of the multiple-labeling algorithm for Hoshen-Kopelman percolating clusters for different values of input parameters in two high-performance computing systems installed in the MSC RAS – MVS-100K and MVS-10P.

19. Modeling nanoporous structures of silica-resorcinol-formaldehyde aerogels [№3 за 2018 год]
Authors: I.V. Lebedev, A.Yu. Tyrtyshnikov, Ivanov S.I., Menshutina N.V.
Visitors: 6214
The paper is dedicated to investigating and modeling the structure of silica-resorcinol-formaldehyde aerogels. It considers experimental research on production of hybrid silica-resorcinol-formaldehyde aerogels based on the varying conditions for their production (reagent ratio, amount of solvent, etc.). The structural characteristics were the following parameters: a specific surface area and pore size distribution. The generation of structures corresponding to the real ones makes it possible to model various properties of aerogels in silico, which in turn saves resources when carrying out costly experiments. The authors have studied the existing methods of generating porous structures of silicon-resorcinol-formaldehyde aerogels. To model such aerogel structures, they have chosen the Diffusion-Limited Cluster Aggregation (DLCA) method. The paper considers the conducted computational experiments for generating model structures and compares them with experimental ones according to the selected criteria (pore size distribution and specific surface area). The results of a number of computational experiments showed good convergence between experimental and simulated structures of hybrid silicon-resorcinol-formaldehyde aerogels. To implement this method, a C# algorithm was developed in the Microsoft Visual Studio development environment. The created software requires the Microsoft Windows 7 operating system and above and at least 2 GB of RAM. The paper presents the results of computational experiments and the algorithm for generating silica-resorcinol-formaldehyde aerogel structures. The developed software allows obtaining real structures of silica-resorcinol-formaldehyde aerogels with given structural characteristics.

20. Models of enterprise information system support in lifecycle stages [№3 за 2018 год]
Author: Yu.M. Lisetskiy
Visitors: 9319
The article considers an enterprise as a complex organizational system, which requires a modern management information system for effective functioning. Such system enables information collection, storage, and procession to increase relevance and timeliness of made decisions. The problem might be solved based on complex automation of all industrial and technological processes and required resources management. The paper shows that the information system description is formed based on a lifecycle model, which defines the order of development stages and criteria of stage transition. An information system lifecycle model is a structure that defines a sequence of completion and interconnection of processes, actions and tasks throughout a life cycle. The structure of the information system life cycle is based on three groups of processes: primary (acquisition, supply, development, operation, maintenance), supplementary (documenting, configuration management, quality assurance, verification, attestation, assessment, audit, problem resolution) and organizational (project infrastructure building, project management, definition, life cycle assessment and improvement, training). The paper describes the most widely spread life cycle models such as waterfall, iterative and incremental (stage-by-stage model with intermediate control) and spiral. It demonstrates that the enterprise information system appears to be a passive category in the processes of study and design. This category functioning can be described using support life cycle models including composition, functioning and development models. Development of these three models appears to be an additional informational factor that enables structuring of the process of enterprise information system creation and functioning.

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