Several properties of classical Hamming codes associated with the features of detecting errors that occur simultaneously in both information and control bits of code words are revealed, which is relevant in many applications, for example, in the synthesis of self-checking and fault-tolerant digital computing devices and systems. It is shown that when the number of cases of information bits m tends to infinity, the number of undetectable errors that arrose simultaneously in the information and control bits of Hamming codes increases by 2k–1 times with k being the number of control bits, as compared to the number of undetectable errors that occur only in the information bits of their code words. It is also proved that for m→∞, the ratio of the number of undetectable errors that occur simultaneously in information and control bits to the number of undetectable errors appearing only in information bits for a Hamming code with k + q control bits increases by 2q times with respect to the ratio for the Hamming code with k control bits (here q is an arbitrary natural number). The established characteristics of Hamming codes should be taken into account when synthesizing self-checking digital devices. Examples are given of the synthesis of built-in control circuits using the Boolean complement method with consideration of the revealed properties of Hamming codes.

Approaches to formulation and solution of the problem of choosing the configuration of spacecraft onboard equipment, which ensures autonomous reconfiguration of the spacecraft, are considered. Two directions for solving such problems are singled out: based on the formalization of the Markov decision process (MDP) and using dynamic programming and machine learning, and on the basis of account for structural and functional dependencies of the spacecraft onboard control complex (onboard equipment) elements with application of general logical-probabilistic approach (including machine representation of functional integrity scheme) and the theory of structural dynamics of complex systems. The MDP-based approach is presented by foreign authors who consider reconfiguration in the context of scheduling sessions of the target spacecraft equipment. The approach based on structural-functional dependencies is formulated, first of all, as a synthesis of a new structural state of the spacecraft after a failure occurs. At the same time, both domestic and foreign authors, independently of each other, come to a specific formulation of the problem of choosing the configuration of onboard equipment, while assuming that the choice of the necessary rational configuration is carried out under specified conditions, defined as the required modes of functioning of the spacecraft and the limitations associated with them.

The problem of building the architecture of distributed virtual machine is being solved. A technical implementation of a distributed virtual machine is proposed, which provides the construction of an infocommunication infrastructure based on new principles. In the case under consideration, data transfer between network nodes occurs as a software interaction between individual nodes of a virtual machine, which allows the application developer within a distributed system to abstract from the communication level. A minimally sufficient set of instructions for a virtual machine is proposed to provide remote function calls, as well as a mechanism for extending the set of instructions with application functions. A distinctive feature of the architecture is the use of an object-oriented approach to build an extensible bytecode execution environment with the ability to access objects located remotely on network nodes. The approach is applicable in a number of practical tasks, in particular, for building distributed interactive applications, information systems, as well as for organizing communication between robotic systems in swarm scenarios of their use.

A unified information and analytical platform (UIAP) is developed, an example of its use in the synthesis of a single digital space of a modern airport using complexes of intelligent transport and technological means (ITTS) is presented. The development and application of the UIAP is based on a constructive description and practical implementation of the system-cybernetic approach and design methods, organization of production and proactive management of the operation of ITTS complexes in a single digital space of the airport based on the UIAP, cyber-physical systems, intelligent digital interfaces that differ from existing analogues by the presence of a unique universal metalanguage for describing cyber-physical systems and mechanisms of their interaction based on intelligent interfaces, as well as the possibility of operational integration of an unlimited number of cyber-physical systems of various classes into one "metakiberphysical" system. On the basis of the widespread introduction of ITTS complexes, the digital transformation of the airport services and systems into a single information technology ecosystem is performed, within which it is possible to move from specialized monofunctional interfaces to universal ones in the relevant services and systems, from unformalized, unstructured, incomplete and inaccurate information to structured, formalized data and information. In addition, the proposed transformation makes it possible to significantly reduce redundant material and information connections, as well as reduce the impact of the human factor on the safety and efficiency of the airport.

The problem of localizing failures of sensors (accelerometer and gyroscope) of an unmanned aerial vehicle of the "quadcopter" type is considered. An algorithm is developed that provides the ability to detect and classify quadcopter sensor failures using machine learning methods. To solve the problem, the following machine learning methods were used: logistic regression, random forest method, LASSO and ridge regression, as well as elastic net. Experimental results obtained in the course of computer simulation confirm the efficiency of the proposed algorithm. A comparative analysis of the used methods of machine learning is performed.

Results of study of wood samples (variety – pine) under thermal exposure in a muffle furnace are presented. The research is carried out by measuring color characteristics using a color decomposition model into RGB components. Under thermal exposure, changes occur in wood due to chemical and physical processes. Time and temperature are indicators of the degree of thermal damage. Dependences of changes in wood samples color characteristics in the RGB system on temperature and exposure time are established experimentally. A criterion for controlling the thermal damage degree is proposed, and a device is developed to implement the method. The device is based on the TCS3472 color sensor and a programmable logic controller. The data obtained can be used in investigations of fires at objects made of wooden structures, in the study of fire propagation paths, as well as in monitoring the degree of thermal damage to wood during various technological processes.

The kinetics of destruction of metal products made using additive manufacturing technologies, namely, selective laser melting, is studied. Features of this method of products manufacturing process give rise to various kinds of structural inhomogeneities in the material, which, in turn, affect the strength characteristics. The use of the acoustic emission method in the study of fracture kinetics makes it possible to reveal the initiation of fatigue fracture processes in the material.

The aim of the study was to develop a technique for assessing the minimum number of malignant cells recognizable by their diffuse reflectance spectra obtained in the near infrared region (NIR) using compact spectrometric equipment. In the course of the study, a culture of ovarian cancer cells was prepared for subcutaneous injection into laboratory mice; solutions with various concentrations of such cells were prepared to create a calibration scale. Measurement of NIR spectra was carried out on live laboratory mice (at pre-marked points) under anesthesia before puncture and after the introduction of cell culture. Spectral characteristics that are sensitive to changes in the number of cells at the measurement point (peak intensity, baseline shift) have been identified, and the minimum reliably recognizable number of malignant tumor cells has been estimated from the graph of the dependence of the absorption value at a wavelength of 1200 nm on the logarithm of the number of cells in solution.

The complexity of integrating computer-aided design systems, in particular AutoCAD, and computer-aided design of technological processes is caused by the lack of the necessary interoperability between them. A method of parallel formation of the geometric and parametric model of a part is proposed, which makes it possible to ensure the necessary compatibility of models. The method is based on the creation of a library of parametric models of structural elements. Setting the element by displaying the parameters on the screen automatically leads to the setting of its geometric image with subsequent attachment to the forming image of the part. The method requires the creation of appropriate libraries of structural elements and the organization of a single information space for technological preparation of production. The proposed method reduces the time for designing parts and developing technological processes.

In order to substantiate the possibility of creating narrow-band radiation of super-Planck intensity, methods for creating high-intensity thermal radiation with a given spectral band have been studied. A method based on a fundamentally new approach to the creation of high-intensity radiant heat fluxes has been developed. The method consists in compressing the initial radiation spectrum to a spectrum of a given width. According to the method, the energy of the initial continuous optical radiation is re-emitted in a given, narrower range of the spectrum, for which a modification of the radiating surface is used in the form of an ordered solid-state microstructure that transforms the spectrum of the initial radiation. The modified radiating surface is created by a system of identical structural elements of a given shape protruding from a flat surface. The elements dimensions of the distances between them are found by calculation based on the required intensity and frequency range of the generated radiation. The possibility of generating narrow-band radiation exceeding Planck radiation by several times in intensity is established and demonstrated. The developed method is in demand in the metrology of temperature and optical measurements, in scientific research and in industry. The method can be used for energy harvesting, in the production of high-performance optical sources in the infrared range, in IR spectroscopy and laser optics, as well as in the development and creation of tunable infrared sources and other efficient applications in the field of energy.