Vol 7, No 1 (2020)

Thanks to the achievements of modern science, in particular, functional ceramic materials, valuable and practical solutions have appeared for energy-efficient technologies using Photonics. The development of special functional ceramics for absorbing light and converting it to other spectral ranges is transmitted as IR radiation.X with high pulse energy on various objects like people, animals, plants, microorganisms, solids, liquids, or gases. Some of these solutions are IR.X has already been tested and shown high efficiency. However, many studies are still in the early stages of development. The purpose of this article is to show the possibilities of using this kind of energy in comparison with traditional methods.

The high cost of solar cells prevents the widespread use of solar energy in the world. The work is devoted to the problems of obtaining and studying the properties of thin films applicable as antireflection coatings in the manufacture of solar cells. In this work, coatings of polyvinyl butyral with silver nanoparticles on the surface of α-Si:H solar cells were obtained. The method of extracting the solution from the cuvette used in the work is simple and does not require highly qualified specialists. Using optical spectroscopy, it was found that the introduction of Ag nanoparticles into polyvinyl butyral films leads to the appearance of an absorption band in the region of 420-450 nm, associated with plasmon resonance of nanosilver. Using infrared spectroscopy, it was determined that with an increase in the concentration of silver nanoparticles in coatings, the valence peaks - CO decrease. The main characteristics of solar cells before and after application are measured. It was found that solar cells with deposited polyvinyl butyral films with silver nanoparticles at a concentration of 12 mmol/l have a short circuit current value of 10% more on average than similar solar cells without deposited films.The results of this work may have some practical value for single, polycrystalline, cascade solar cells. It is known that an increase in the efficiency of all solar cells available in the world, at least by 1%, can give an additional 5 GW of power and more than 10 MW for Russia.

The process of synthesis of materials in a solar furnace was studied using the example of ferrous barium oxide. It is shown that when BaCO3+ Fe2O3 is exposed to concentrated solar radiation of high (300 W/cm2) density, hexagonal ferrous barium oxide 4(Fe2O3)4(FeO)BaFeO3 - х , cubic Ba3Fe2O6 - х = 2(BaО)FeOBаFeO3 - х, tetragonal BaOFeOBaFeO3 - х modifications

This article presents the results of research on the influence of acid-type welding electrode calcination methods by standard technology in electric furnaces and a new method of calcination in furnaces using functional ceramics radiation on the welding and technological properties of welding electrodes and determining the optimal modes of calcination when exposed to radiation on electrode coatings. The influence of exposure time T exp of radiation exposure on such welding and technological properties of welding electrodes as the breaking length of the arc L bla, the formation of the deposited metal ødp, the formation of a visor at the end of the electrode h v and pores in the deposited metal N pors, as well as the coefficients of melting αm, surfacing αs and loss of carbon and spattering Ψ was studied. According to the results of the research, the improvement of welding and technological properties during the piercing of welding electrodes by a new method, which consists in processing the coatings with an electrode in a furnace using radiation with functional ceramics at the optimal exposure time T exp. This method of calcining welding electrodes using functional ceramic radiation allows you to obtain high-quality welding and technological properties of coatings, while saving energy consumption and reducing the time of calcination compared to standard technology.

Information systems of high-tech enterprises that develop and produce high-tech products, including products and services based on nanotechnology, are characterized by large volumes of dynamic information flows and require protection of confidentiality, availability and integrity of information circulating in them. To protect information, an appropriate resource is allocated, which is distributed by tasks and time according to the decision of the appropriate management body. Making such a decision requires information about the current information security environment - a reliable and complete audit report. An information security audit is organized and conducted to formulate a conclusion.To study the problem, a retrospective analysis of the development of goal-setting in the management of the audit program was conducted. The appearance of the reference model of the audit object as a set of interrelated properties of the audit object was developed, and a scientific hypothesis was put forward about the expediency of taking into account the weight of each audit certificate and the cost of obtaining it, mathematical models for processing expert judgments are given. To prove the hypothesis, an experiment was planned and conducted, which resulted in data confirming the hypothesis. A practical example of using the method to determine the weight of audit evidence, taking into account their cost, is given. The direction of further research is indicated.

In this work, we used the Altman model, the apparatus of the theory of fuzzy sets and mathematical simulation in conditions of high uncertainty, in order to give more information to the decision maker about the creditworthiness of the enterprise, as well as the possible impact of the error on the conclusion of bankruptcy of the enterprise when calculating economic indicators.The improved Altman model, developed initially in two respects (the rms integral approximation is used to accurately calculate a quantitative credit rating and the apparatus of fuzzy sets in order to order sets according to the degree of confidence in the obtained probability), expanded by presenting the input data as triangular fuzzy numbers .As a result of the work done, it was possible to construct an algorithm for assessing the creditworthiness of a particular enterprise, which is based on the continuous dependence of the probability of bankruptcy on the value of the Altman function. The coefficients of the model can be triangular numbers with additional criteria for pre-reading at critical points of the classical Altman model.The work carried out a simulation of the assessment of creditworthiness for incoming fuzzy economic indicators in the form of α-sections of a fuzzy set to predict the impact of errors in the assessment of economic indicators on the conclusion of bankruptcy of an enterprise. The described improved Altman mathematical model with the procedure of a computational experiment (where the probability of bankruptcy of an enterprise is calculated 1000 times), supplemented by fuzzy indicators, allows you to find leftside and right-side sets of α-levels of the fuzzy set k i and calculate the effect of small changes in Altman coefficients on the estimate of the probability (its stability) of bankruptcy enterprises.This approach helps not only to adequately assess the creditworthiness of the enterprise, but also to enable it to predict the change in the result of the model due to a possible error in the input data.

The article considers the issue of ensuring the functional effectiveness of video surveillance systems. Indicators are proposed to evaluate the effectiveness of solving the main tasks of video surveillance. A description of Russian recommendations and European regulatory requirements for the detection, recognition and identification tasks is given, and a study is conducted to examine the objectivity of these requirements and recommendations. The results of the study indicate that the application of regulatory requirements does not guarantee an effective solution to the problems of detection, recognition and identification. To ensure the functional effectiveness of video surveillance systems, the authors of the article suggest designing the resolution characteristics of video cameras when designing. In the future, the authors plan to analyze methods for determining the resolution of video cameras.