This article discusses the technology of the Internet of things, which is used to connect smart objects to the network, for intelligent control of the power system and automation of household processes. Intelligent power system management aimed at ensuring a more uniform use of electricity and minimizing energy losses during transmission and consumption of electricity. This technology is currently being promoted globally by utilities, scientific organizations, and governments. In this work, also, a conceptual model of a smart home is built in the Cisco Packet Tracer virtual constructor and diagrams of device interaction at all levels of network construction are given.
Keywords: internet of Things, IoT, cybersecurity, automation, Cisco Packet Tracer
This article discusses information system vulnerabilities associated with the use of personal mobile devices in financial services companies. The recommendations of this study will help to understand the importance of formulating an information security policy in this situation. The use of personal devices by employees has become commonplace in the workplace due to the increased reliance of business processes on Internet-based services and advances in technology. The organization benefits from the fact that employees buy, use their own devices, thus, the organization reduces the cost of providing employees with computer equipment and software for workplaces. However, a company can suffer huge losses if the use and connection of personal devices to the company's information technology infrastructure is not regulated and controlled. Hacking personal devices by intruders allows you to gain unauthorized access to the assets of information systems. Financial institutions handle highly sensitive information, which makes them more vulnerable when using personal devices. A qualitative research method was conducted with specially selected participants working in the information security departments of financial institutions. The study revealed the lack of an information security policy regarding personal devices and the use of an unlimited number of such devices by employees.
Keywords: personal mobile devices, information security, unauthorized access, vulnerabilities, cyber attack
The problem of computing symmetric Hadamard matrices of the Balonin-Siberry construction is considered. To obtain such matrices, a large number of random binary sequences are required to select three of them, which are bound by the requirements of the matrix design. Such sequences are the first rows of three cyclic blocks of Hadamard matrices. The background of the emergence of quantum computing and the advantage of quantum generation of binary sequences for subsequent selection are considered. The calculation of Hadamard matrices is proposed as a test problem for quantum computers, which allows to show quantum superiority.
Keywords: quantum computers, qubits, random number generators, orthogonal matrices, Mersenne matrices, Kronecker product
The main maintenance of a diversification of production as activity of subjects of managing is considered. being shown in purchase of the operating enterprises, the organizations of the new enterprises, redistribution of investments in interests of the organization and development of new production on available floor spaces. The most important organizational economic targets of a diversification of management are presented by innovative activity of the industrial enterprise.
Keywords: wastewater, dephosphatation, acidification, nutrient removal
The design of the organizational structure is an integral factor in the formation of any organization, including in the construction industry. The changing operating conditions of enterprises existing in the era of the information revolution directly affect the efficiency of organizations and the entire construction industry. The impact of the latest technologies should be reflected in the planning, organization and control at all stages of the life cycle of a construction object.
Keywords: construction, organization, management, planning, design, organizational structure, virtual structure, virtuality, digitalization, Gartner curve
Building objects experience various kinds of impacts that can cause deformations of structural elements - deflections, integrity violations, complete destruction of individual elements, etc. Timely detection of deformations and monitoring of their dynamics is the most important element of the safe operation of buildings and structures. The task of monitoring cracks in building structures is to record changes in cracks in order to monitor their technical condition. As a result of monitoring, decisions are made on the further operation of the facility, the need for repair measures, and the elimination of factors affecting the development of cracks. The use of beacons makes it possible to monitor the behavior of deformations of building structures. For the simplest observations, gypsum and point beacons can be used, for more detailed observations, clock-type beacons and plate beacons can be used. Electronic beacons enable detailed automated monitoring of changes.
Keywords: crack, beacon, gypsum beacon, lamellar beacon, sentry beacon, point beacon, crack opening width
Building information modeling (BIM) creates new opportunities not only in design and construction life cycle's phases, but also in operation of buildings. One of the most promising fields is historical building information modeling (HBIM). In the article areas of BIM's application during inspection and monitoring of timber strutures of historical buildings are outlined. Creation of 3D model of objects with complex geometry and structures with variable cross-sections is described. Questions of early warning system's creation during structural health monitoring (SHM) of buildings are considered. Works of domestic and international authors are analyzed. Areas that deserve further investigation are determined. They include integration of BIM with geographic information systems (GIS) and non-destructive testing (NDT) methods, creation of database of defects of buildings and structures.
Keywords: architectural monument, BIM, defect, early warning, HBIM, inspection of buildings, NDT, SHM, technical condition, timber structure
The paper considers a model problem of a combined thermal and diffusion process in silicon. The mathematical model of this process is an initial-boundary value problem for a system of linear partial differential equations of parabolic type. In this system, one equation describes the process of heat propagation in silicon, and the other describes the process of impurity diffusion in it. In this case, the equations are not independent in the same way that the diffusion coefficient depends on temperature. For each equation in this system, the corresponding initial-boundary conditions are set. An implicit difference scheme and the classical sweep method are used to find an approximate solution to the problem that has arisen. The paper presents a description of a numerical algorithm and exact calculation formulas for solving a discretized parabolic problem.
Keywords: model of thermal diffusion process, numerical simulation, sweep method, implicit difference scheme
The article describes the algorithmic realisation of a software module for evidence of learner’s identification in the testing process. The advantage of this module is simple operation, ease of implementation and execution as well as convenience of application by various categories of users. The need for such a module was engendered by the problem of examinee identification during testing in the e-learning system. The technology of program module operation is based on forming questions with the use of information stored in the learner’s personal account; the operation result is demonstrated through confirmation or non-confirmation of the examinee’s identity in real time.
Keywords: distance learning, identification, student testing, software module, learner’s personal account
The article is devoted to the issues of accounting for various production disturbances that affect the temperature field in the drying chamber. The nature and nature of disturbances affecting the change in chamber temperature are taken into account using statistical methods for processing temperature curves over time. The temperature field in the plane of sensor installation was considered.In practice, the electrical model of the temperature field of the drying chamber can be represented as a three-dimensional grid, and the nature of the temperature field can be judged from the distribution of potentials at the corresponding grid nodes. By changing the grid parameters, it is possible to determine the appropriate temperature regimes for different materials and types of impregnations.
Keywords: temperature, statistical methods, drying chamber, autocorrelation function, spectral density, amplitude-phase characteristic
The article discusses the method of recognizing contours in the primary image. An algorithm has been developed for finding the absolute minimum of functionality in an image.
Keywords: contour, algorithm, defect, recognition, cut, reference frame, minimum search
In the article, a mathematical model of the oscillations of an aerodynamic pendulum in the flow of a moving medium is constructed and investigated. As a model of the effect of the medium on the body, the model of quasi-static flow around the plate by the medium is adopted. According to this hypothesis, the aerodynamic forces acting on the body are applied at the center of pressure. In our problem, the pressure center is movable relative to the plate. The equations of motion for the body under consideration are obtained. The transition to new dimensionless variables has been carried out. The violation of uniqueness in determining the angle of attack at points where the air velocity of the pressure center is close to zero is shown. Envelopes for some areas of ambiguity are constructed using multiple solutions of algebraic nonlinear equations derived from kinematic relations. To do this, the coordinates of the return points are determined, the solution of the equations themselves is found, and the boundaries of the areas of ambiguity are depicted. In the mathematical package MATLAB 18, a program is written that.
Keywords: body, ambiguity area, envelopes, return points
The article considered retail as a system that includes complex systems. involves consideration of a proposed system associated with multiple non-linear relationships and the presence of hidden influences. Proposed an application of the algorithm for solving a reverse problem during strategic planning in retail to help in understanding complex processes that change depending on the effectiveness of the implementation of the strategy.
Keywords: strategic planning, retail, reverse modeling perspective, fuzzy cognitive maps, management in complex systems
This article discusses the problem of ensuring the control of the state and strength of the device for handling radioactive materials at nuclear power facilities and proposes the development of a remote ultrasonic control system for continuous-periodic monitoring of the state of critical structural elements of the service traverse operating in a radiation hazardous environment. The basic principles of processing the results of ultrasonic flaw detection and obtaining characteristics are given.
Keywords: ultrasonic testing, piezoelectric transducer, defect, strength, monitoring
This work is devoted to the development of a control system for the technological process of extruding a polymer coating of pipes. In the process of work, the existing system for regulating the temperature of the polyethylene extruder zones was analyzed, and the scientific and technical literature was analyzed. The description of the technological process of extruding the outer polymer coating of a steel pipe is given, the selection of automation equipment is carried out. The main difference between a proportional controller over a proportional-integral-derivative controller was described, the optimal tuning coefficients of the PID controller were also determined using experimental methods, graphical transients were given, and the most appropriate method for controlling the temperature of the zones of worm machines was selected, due to which increasing the homogeneity and uniformity of the protective polymer layer.
Keywords: pipe polymer coating extrusion, PID controller, polyethylene, adhesive
The article is devoted to solving the important problem of developing interactive maps that reflect the diversity of natural and historical heritage in cultural landscapes in order to solve the problem of managing the territorial systems of a cultural landscape. The main objects of mapping are natural-social-production systems - metageosystems, their recreational and tourist potential and the degree of its development. Results. The interactive map "Natural and cultural heritage of the Republic of Mordovia" was developed using the methods of object-oriented design, UI / UX design and programming and implemented as a web portal, the core of which is semantic search and geodata visualization tools. The methodology presented in the article for developing a digital interactive map of tourist and recreational metageosystems is based on geoinformation modeling and the effective use of diverse information about the region.
Keywords: geoportals, cultural landscape, spatial data infrastructure, management in organizational systems, spatial data, decision making
To improve the efficiency of low-orbit satellite Internet systems (LOSIS) and ensure high apeed of data exchange, systems supporting orthogonal frequency-division multiplexing (OFDM) technology are widely used. The use of OFDM methods makes it possible to expand the bandwidth of the radio channel based on the increase in spectral efficiency. In order to do this, OFDM systems use orthogonal signal transformation based on fast Fourier transformation (FFT). To reduce the time spent on signal processing, the article proposes to use discrete wavelet transformations of signals (DWT) implemented in modular residue classes codes (MRCC). The scientific novelty of the work lies in the fact that based on the integration of methods for constructing discrete wavelet transforms and methods for developing modular codes, mathematical models of DWT implemented in the MRCC will be created, the use of which will reduce the execution time of orthogonal signal processing in OFDM systems. This result will be achieved by parallelizing arithmetic operations on the modules of the modular code. At the same time, the use of low-bit operands makes it possible to switch from performing multiplication, addition, and subtraction operations in the MRCC to retrieving data from LUT tables. Thus, the development of mathematical models of discrete wavelet transformations implemented in modular codes of residue classes is an urgent task.
Keywords: OFDM systems, discrete wavelet transformation, parallel coding, modular residue classes code
This article describes training a neural network to recognize the digits of a freight container number. Due to the lack of a dataset containing a cargo container, training was performed on the Street View House Numbers dataset. Before training the model, the dataset was analyzed and histograms were built that reflect general information about the dataset. The neural network was trained in the Python programming language using the Tensorflow library. The obtained results of assessing the accuracy of the model operation allowed us to conclude that it is possible to use a data set and a neural network to solve the problem of recognizing the numbers of a freight container.
Keywords: machine learning, digit recognition, cargo container, neural network, image classification
The work is devoted to ensuring the completeness of mixing of gas coolants into a direct-acting heat exchanger by optimizing the geometry of the mixing chamber, in particular the addition of a funnel. Four funnel configurations in the range of 45°-180° are considered. The problem is solved in a stationary formulation by numerical simulation in the OpenFOAM environment. A 14-fold increase in the uniformity of mixing is shown when using a 45° funnel compared to a cylindrical mixing chamber.
Keywords: heat exchanger, mixing heat exchanger, efficiency improvement, outgoing flue gas, numerical modeling, heat recovery
This paper gives an overview of the main safety problems of modern APCSs and formulates the challenges to overcome them. The aim of the work was to review the safety of modern APCSs. Emergencies associated with consistent erroneous actions of operating personnel must prevent control systems. Until the early 2000s, APCSs were considered to be the safest systems, due to their operation according to a rigid and verified algorithm, the human factor could not affect them. To enable remote control and monitoring, an internet connection became necessary. Due to an increase in the number of cyber-attacks on automated process control systems, an unprotected Internet connection had become insecure, and a new opportunity to influence the system from the outside had appeared. The security and reliability of modern process control systems has become even more important.
Keywords: automated process control system, safety, vulnerability
The article considers the well-known methods for comparing graphic images. To improve the accuracy of comparison of low-informative images, which are used as formalized symbols of elements on topographic maps, the paper proposes a method for comparing low-informative graphic images, consisting of a set of image comparison methods - the root mean square deviation of the pixels of one image from another and the method of pixel-by-pixel comparison of images. The definition of a formalized graphic document is given. A detailed description of the proposed methodology is presented. By way of example of two data sets, consisting of graphic elements distributed by classes depending on their style, the operation of the technique was tested and the optimal parameters were experimentally selected in the context of solving the problem. The results of the computational experiments carried out in the paper showed the effectiveness of its application in comparison with known methods for solving the problem.
Keywords: image comparison, technique, formalized graphic document, root mean square deviation, pixel-by-pixel comparison, experiment, low-informative image, class, topographic map, image size
The method of fixing soils is injection filling of voids, which is produced by binding materials - cements, clays, bitumen, etc., and sand, sawdust, loam, suspensions are used as inert fillers. It is possible to improve the quality of cement composite solutions through the use of reinforcing additives, which in the future will ensure a high degree of reliability, safe operation of facilities. The paper considers the possibility of involving nano-additives in grouting compositions, such as aluminosilicates, in particular boehmite. Studies of the hardening processes of composite solutions in the presence of bentonite grade P1T1 with different content of boehmite have been carried out. The concentration of boehmite at which the rate of hardening of the composite solution is maximal is determined. In order to save cement, the effect of the surfactant on the strength of the composite solution was investigated, it was found that the 20% introduction of the surfactant into the composite solution gives a strength that almost coincides with the zero sample.
Keywords: safe operation, plugging compositions, boehmite, surfactants, strength, structure formation, optimal concentration, nanosystem, modifier, cement