Category Archives: 2020 year


UDC 004.85:004.056.57

O.N. Vybornova, I.A. Pidchenko

The continuous growth in the number of malicious programs makes the task of their detection urgent: classifying programs into malicious and safe. In this regard, this study is devoted to the development of a malware detection system based on machine learning, namely, training an artificial neural network with a teacher. In the course of the study, we analyzed the structure of Portable Executable files of the Windows operating system, selected characteristics from PE-files to form a training set, and also selected and substantiated the topology (four-level perceptron) and parameters of the antivirus neural network. The Keras library was used to create and train the model. The Ember dataset of safe and malicious software was used to form the training set. We have trained and verified the adequacy of training for the developed malicious code recognition model. The training results of the anti-virus neural network proposed in the study showed a high accuracy of malware detection and the absence of the overtraining effect, which indicates good prospects for using the model. Although the experimental model of a neural network is not able to fully replace the anti-virus scanners, the materials of the article are of practical value for the tasks of classifying programs into malicious and safe.

Keywords: malware, machine learning, anti-virus neural network, neural network training, Keras, Ember, Dropout.

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UDC 004.9:629.423.1

Y.M. Kulinich, S.A. Shuharev

The paper deals with the application of the method of time series analysis to predict the cost of electricity and assess the state of insulation of power circuits of an electric locomotive. The proposed approach makes it possible, on a scientific basis, to plan the amount of funds allocated to pay for electricity, as well as to take timely measures aimed at restoring insulation and excluding the causes of fires that occur on locomotives. Time series analysis was carried out with the help of an application program that allows assessing the trend of changes in the indicators under consideration. A device for monitoring the state of insulation of power circuits of an electric locomotive is also proposed, in which the developed program for forecasting time series is implemented. Installing the device described in the work on the locomotive will allow timely assessing the current and predicted state of insulation, as well as taking timely measures to restore it. The urgency of the problem of diagnosing the state of insulation is due to the aging processes of fixed assets (machine tools and equipment) at industrial enterprises, which requires timely measures to restore the state of insulation of power electrical equipment. The application program is implemented in the MatLab package and is used to predict the cost of electricity. To expand the possibilities of using the application in other applications, the source code of the program was transformed into the code written in the high-level C language. The program obtained in this way is used in the PIC18F452 microcontroller to assess the state of the insulation of the power circuits of an electric locomotive.

Keywords: time series forecasting, singular spectral analysis method, singular decomposition, electricity cost, insulation condition.

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UDC 536.3

A.I. Borisova, V.L. Burkovsky

Currently, the problem is the uncertainty of the physical processes of complex-structured electrical complexes, which requires a set of thermal experiments on simulation models, in order to determine the thermophysical parameters of individual parts and elements for analyzing the mutual influence of temperature fields in distributed electrical complexes. At the same time, taking into account the influence of external and internal influencing factors, the approach to solving the problems of such heat exchange is limited by the complexity of electromagnetic processes in elements with various physical properties, as well as the difficulties of taking into account the sets of structures of a complex configuration, which leads to the need for new more accurate solutions on the principles of mathematical modeling. In the presence of a reliable thermal mathematical model, it will be possible to develop a rational design using techniques and structures, taking into account the effective distribution of heat flows. In this regard, in the course of mathematical modeling, all available surfaces of the electrical complex were taken into account when forming the thermal mode technique. The analysis of thermal characteristics will allow predicting the behavior of such distributed electrical complexes at the design stages, which closely links the design methods that ensure resistance to destabilizing factors.

Keywords: thermal process, thermal conductivity, electrical complex, mathematical modeling.

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UDC 004.415.2

E.Y. Sobolevskaya, D.A. Kiikova

The article is discusses to the design of a reference information system for a medical laboratory evidence from «Unilab» LLC, Vladivostok. According to research of existing medical information systems, mainly implemented systems is used in medical organizations in which patients are receiving, or there are directories that do not meet the requirements of the laboratory. The system under review will provide access to complete and up-to-date medical research information to company employees, improve the quality of call center consultations, and speed up the introduction of changes to medical research information on the company’s website and in 1C system. As a result of the work, user classes were identified and their characteristics described, requirements (business requirements, user requirements, functional requirements) of users were identified using the following methods: interviewing, document analysis, analysis of the user interface of the company’s information systems. The reference information system was designed using the UML modeling language according to the identified requirements according to the ICONIX methodology, the following diagrams were presented: use case diagrams, suitability diagrams, sequence diagrams, and a class diagram. In addition to the diagrams of the selected methodology, a contextual data flows diagram was constructed. Designed prototypes of user interfaces (block diagrams of pages).

Keywords: reference information system, designing, information technology, ICONIX, medical laboratory, healthcare digitalization.

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UDC 004.047

T. E. Smolentseva, A.V. Svishchev

The purpose of this work is to identify the factors that ensure optimal planning of the cargo transportation process with the subsequent formation of the logistics structure of this process. To solve this problem, the main factors that will ensure technical equipment, the use of various types of transport and the determination of transport capacity, accounting for production processes are identified. Based on the theory of Queuing, an algorithm for forming the structure of the process of organizing optimal planning of cargo delivery, with determining the value of throughput, as well as the costs of this process, is developed, which allows in the event of a time delay to make an effective management decision to ensure this process. In the process of analyzing cargo transportation planning, the decision-maker must take into account: the time spent on completing all the processes at the stage of preparatory work, followed by the implementation of steps aimed at equipping the points of acceptance and departure of goods. The structure of the process of organizing optimal planning of cargo delivery considered in this paper allows us to determine the main factors involved in the formation of a cargo transportation plan.

Keywords: cargo transportation, optimal planning, schedule of vehicles, throughput, cargo transportation volumes, supply chain management system.

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UDC 616.5-002

A.N. Morozov, V.S. Zarubin, S.A. Grishin

The problem of evaluating the quality of user interfaces of computer programs is considered. Indicators of the overal and relative information content of user interfaces are proposed, their mathematical model is developed, and analytical expressions for calculation are obtained. Most often, an indicator of the quality of user interfaces is understood as a function of the total time of elementary operations on its elements spent by the user to solve a specific task. Interface elements are understood as information interaction objects – input fields, icons, various types of lists, tables, and so on. Basic operations are understood as actions with them – finding, reaching, and managing. The entire set of elementary actions for solving a specific task is called the task profile. It is convenient to use time indicators to get generalized values of the interface quality indicator both in General and at each step of the profile (on the principle that the shorter the time or the number of operations, the better). But they answer the question “how much”, not “why”. Why, for example, can a task profile have a greater number of steps but a shorter execution time compared to a similar one? In General, interface elements make up a complex system with multidimensional relationships by belonging to a particular task, by importance, by frequency and method of use, and so on. Therefore, an attempt to randomly change the configuration of the monitor screen in order to optimize actions at a particular step may lead to changes in the time values at the remaining steps of the profile with unpredictable results. One of the ways to solve the problem of analyzing and/or optimizing interfaces is to develop quality indicators that operate on the characteristics of the overall layout of interfaces, in particular the number, size, and location of elements on the monitor screen. These indicators include the proposed indicators of overall and relative information content.

Keywords: computer program, user interface, analysis, quality indicator, indicator of overall information content, indicator of relative information content.

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UDC 616.5-002

N.A. Korenevsky, D.A. Mednikov, S.N. Rodionova, V.V. Starodubtsev

The aim of the study is to improve the quality of predicting coronary heart disease in railway locomotive crews by developing hybrid fuzzy mathematical models that work under conditions of incomplete and fuzzy description of the object of research. Taking into account the poorly formalized structure of the studied class of States, the technology of soft computing and, in particular, the methodology for the synthesis of hybrid fuzzy decision rules, which has proven itself well in solving problems with a similar data structure and type of uncertainty, is chosen as the basic mathematical apparatus. The chosen synthesis method allows us to take into account the multiplicative effect of heterogeneous and unstable endogenous and exogenous risk factors on the human body in the locomotive cabs. The obtained mathematical models for predicting ischemic heart disease in locomotive crew workers take into account cabin ergonomics, levels of psycho-emotional stress and fatigue, mixed electromagnetic fields in combination with individual risk factors for systemic ischemic damage as initial data. In the course of mathematical modeling and expert evaluation, it was shown that the obtained predictive model provides confidence in the correct forecast of at least 0.89, which is a fairly “good” result for medical diagnostics tasks.

Keywords: mathematical model, fuzzy logic, forecasting, locomotive crew, coronary heart disease.

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UDC 004.588

V.V. Salnikov, M.N. Kravtsov

The paper considers the issue of building a block hierarchy of software and information models that simulate the subject area in training systems, based on the principle from simple to complex, from elementary functions to more complex ones. This allows us to implement the principle of adaptability in training systems – the ability to manage the complexity of the training process depending on the competence of the trainee. An approach to the construction of a universal task constructor for training systems based on the representation of the training process in the form of changing a finite number of parameters of the training block by affecting it by the trainee is proposed. The training block in this setting is considered as a set of parameters of various types. A method for evaluating the training process is proposed, which involves checking the state of the block at the end of training, that is, checking whether the parameter values match the specified ones. It allows you to create flexible systems for evaluating knowledge. Correlation of certain parameters with the skills of the trainee allows automating the process of controlling the level of his subject competence and makes it possible to implement the principle of adaptability of training systems, which consists in a gradual increase in the complexity of the training process. A prototype of a universal task designer for training systems is presented. Its use significantly simplifies task editing, neglecting the use of programming environments.

Keywords: training, training, training process, training systems, simulator, task modeling.

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UDC 621.396.4

V.O. Klyuchnikov

Radio relay communication plays an important role in the creation of digital infrastructure. Modern digital radio relay lines allow organizing high-speed communication channels supporting the transmission of all types of traffic, including voice messages, packet data transmission, and video signals in real time. The article discusses methods for calculating digital radio relay communication lines, and also provides general recommendations for organizing digital radio relay communication lines. The design of radio relay lines is carried out in such a way that they have high bandwidth and high reliability, taking into account the physical (energy) and channel-network capabilities of the system. The calculation method requires determining the energy parameters, deriving the form of the quality equation, calculating the performance criteria and methods for calculating the attenuation of radio waves at radio relay intervals. The possibility of using MPLS-technology in the radio relay communication was positively assessed. The radio relay network routing system is based on multiplexing streams with a protection mechanism at the channel and network levels. Continuous adaptive modulation mode allows flexible QAM rate change, allowing continuous traffic. The redundancy according to the «1+1» and «2+0» schemes is considered. This scheme doubles the system throughput and prioritizes traffic. The technique allows you to build a digital radio relay network with flexible changes in both physical and network parameters.

Keywords: radio relay network, radio relay lines, calculation methods, quality indicators, radio wave propagation, packet delivery route.

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UDC 004.942+519.876.5

V.S. Feshchenko, V.G. Surinov, V.I. Chukita, V.A. Shepelev

The variety of applications, heterogeneity of physical processes taking place during the passage of information through modern photodetector devices, create significant difficulties in conducting field experiments on them during their development and research. This is especially evident at the stage of development of the advance project, when there is absent only the photodetector itself, but also the very concept of building the device. In this case, it is especially important to carry out the process of mathematical modeling and build a computer model of the proposed photodetector in order to select its layout, optimal parameters and operating modes. This paper describes the development of a computer model of a matrix photodetector or FPA starting from the first stage, the stage of creating a primary vision of an object or system. At this stage, the main components of the FPA, the relationship between them, input, output and control signals were determined. Thus, a conceptual model was built, which reflects in an idealized form the composition and principle of operation of the FPA. At the next stage, on the basis of the conceptual model, a mathematical model of the FPA was developed, checked for adequacy and concluded that the expected deviation of the characteristics of the model from the parameters of the real device was small. Finally, at the last stage, a software implementation of the mathematical model in MATLAB was carried out and a computer model was obtained. Further, in order to check the performance of this computer model, the dependences of the image quality of the FPA on various physical and structural parameters were investigated and it was concluded that this model can be used at the initial stage of the development of the FPA to develop technical requirements for it and compare different layout options.

Keywords: computer modeling, FPA, image conversion, mathematical modeling, photodetector.

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