PNRPU Bulletin. Electrotechnics, Informational Technologies, Control Systems

The article considers trends in modern technologies for processing and transmitting information, as well as the current threats to information security caused by this. There are presented specifics of the implementation of computer attacks on corporate networks, there are grounded features of business processes of information processing that generate information leakage channels. Also there are determined the most effective ways to prevent information leakage, through the control of data flows, using DLP-systems and technologies. There are given the information of practical experience of counteraction to information leakage channels, which allowed to formulate the basic principles of combating this phenomenon, and also to formulate basic groups of criteria for evaluating their effectiveness. At the same time, the one of the main factors for choosing a DLP solution is the quantitative detection of information leakage channels. This article gives the statistics of distribution of probabilities of realizations of the most actual threats of information security for the last period. Conclusions are made about the characteristic changes in statistical data. It gives a brief description of the simplex method used as the basis for constructing the model representation. The problem of constructing a mathematical model is formulated. Based on statistical data, using a simplex method, has been developed a mathematical model that describes the change in the probability of the implementation of information leaks through various channels. At the same time, the growth trends in the volume of information resources of corporate systems are taken into account. Based on the received data, two most relevant leakage channels were identified for the period under study, and projections of the situation development were given. In this article was determined the possibility of DLP-systems for monitoring information leakage channels. The prerequisites are formulated for concretizing the research directions of DLP-systems, in order to prevent information leaks in corporate, automated systems for various purposes.

In this article topics of digital video camera identification using sensor pattern noise are concerned. Nowadays the problem of static images and video sequences inspection is one of the most significant. One of the most important tasks is to assign video for concrete camera (techniques using pattern noise). It is usually necessary in crime investigation concerned with child pornography. Image quality depends on lots of factors. Even if sensor has captured equally illuminated picture (for example white piece of paper), digital image will contain various pixel intense. This is partly because of the shot noise (also known as photonic noise), which is a random component, and partly because of the pattern noise - a deterministic component that stays approximately the same if multiple pictures of the exact same scene are taken. In this paper different approaches to identify camera only with video sequences are reviewed. In conclusion the method effectiveness is considered, some perspective areas are reviewed and some recommendations for further research are given.

The price of energy resources is the key indicator of economy worldwide. Process of pricing on energy difficult also depends on a set of factors including from model of the organization of branch. Any changes of form of relationship in branch affect the price for end users. Reform of power in the Russian Federation assumed that the prices of energy have to fall constantly since between producers there will be a competition. In practice increase in prices has remained, and for separate categories of consumers of the retail market its high speed is observed. In 2016 the Ministry of Energy has presented the main directions of reforming of the retail market of energy. The offered changes will have serious consequences for region economy which will be expressed in sharp increase in prices for energy for separate groups of consumers. Calculation of change of cost of energy for various groups at change of the working model of the retail market of energy is given in article. Negative consequences will concern first of all socially unprotected groups of consumers, such as population. The offered market model will allow to achieve the planned objectives and to recover the market, but at the same time will lead to very big problem for the guaranteeing suppliers which is caused by cross subsidizing and state regulation of tariffs for the population. Certain participants of economy, generally small industrial and nonindustrial consumers who considerably will be able to lower the costs of power supply will become the main beneficiaries from realization of new model. On these groups of consumers the main loading of loss of income from cross subsidizing falls today.

In the problems of advance planning of quality of production of machine-building branch at her design determination of the key parameters influencing level of quality of products and their technical condition in use is of great importance. Therefore an important problem of management of quality of products of mechanical engineering is identification of information model of formation of quality as dynamic model. Increase in production the hi-tech products with constantly updated model range demands the organization of serial-parallel performance of stages of preparation of the production allowing to increase efficiency of a designing process. Due to the development of technological progress, the problem of development of the information maintenance of processes of management of quality allowing to perform operational work on elimination and prevention of defects, to define a condition of a control system of quality of design of products at any moment is relevant. Works of the following scientists are devoted to problems of identification of dynamic models of management: M.A. Arbib, R.E. Kalman, P. Falb, N.P. Buslenko, V. Streyts, V.V. Andreyev, E.V. Teslenko and others. These problems are rather studied, however modern high requirements to quality of products set a task of development of the existing researches of scientists in relation to the field of quality management of products. In article the sets of parameters characterizing level of quality of products in certain time points are described, the scheme of management of process of formation of parameters of quality of products of mechanical engineering is provided, the set-theoretic model describing behavior of a dynamic control system of quality at design of products of mechanical engineering is offered. Statements are formulated and proofs of correctness of these statements are described. The offered dynamic model is intended for adoption of design decisions at design of new products and modification of a design already to products.

In this article, an overview is given of the traditional ways to reduce current surges when the capacitor bank is turned on. The main shortcomings of the presented methods are revealed and an alternative method is proposed - controlled switching. The considered method of controlled commutation allows to significantly reduce the amplitude of current surges when the capacitor battery is switched on due to sequential phase-by-phase switching of the switch phases according to a given algorithm when the current sinusoid passes through zero. Based on the electric network model 6 (10) kV of the power supply system developed in the MatLab / Simulink software package, which includes a source of infinite power, a line with distributed and lumped parameters, a vacuum switch and a reactive load in the form of a capacitor bank, as capacitive loads, The algorithm for controlled switching-on of the capacitor bank is chosen. With the algorithm selected, current surges do not exceed two times the rated current. This algorithm is designed for low voltage networks. For such networks, the use of a mode with isolated neutral is common, the appropriately chosen algorithm has its own peculiarities when capacitor banks is switching. The influence of various factors on the magnitude of current surges, such as network voltage, load power and cable line parameters, is considered. The factors presented are not so significant decreases in current surges and cannot always be applied from the point of view of economic considerations. The main factor affecting the amplitude of current surges when the capacitor bank is switched on is the residual charge on the capacitor, which causes the algorithm to change.

In this paper we consider a wall construction constructed using the technology of non-removable formwork. The wall consisting of a formwork, concrete and a layer of a heater is investigated. Formwork itself is needed to form a concrete mixture. This technology means that the formwork after casting of concrete remains as a part of the finished structure and can perform the functions of insulation, noise insulation, etc. The purpose of the work is to analyze the heat efficiency of various materials of such a wall, as well as to assess the influence of some of its elements on the thermal conductivity. In solving this problem, modeling methods and subsequent analysis were used. For modeling, the multifunctional computer program ANSYS, intended for solving problems of mechanics, heat transfer, electrodynamics and other fields of science, has been applied. The program is based on the finite element method. In the experimental part of the work, two formwork materials were compared, this is sawdust concrete and hyperpressed brick. The thermal insulation properties of three different heaters are compared: mineral wool, extruded polystyrene foam and a backfill insulation - expanded clay. Then, the influence on the thermal conductivity of the transverse walls of the formwork made of different materials is considered. An attempt was also made to reduce the thermal losses in the wall due to a certain arrangement of the elements. As a result of the work, temperature fields were obtained, temperature graphs and diagrams were constructed, thermal flows were calculated through constructions of various configurations, conclusions were drawn about how this or that material or part of the wall affects the thermal conductivity. This work can be useful in the design of more heat-efficient structures.

The article deals with mathematical model of a synchronous generator. The purpose of this article is to improve the mathematical model of a synchronous generator, described by the Park-Gorev equations for an electric idealized machine. The main methods used in this article are the methods for calculating the inductances of a synchronous machine using known relationships. In the modeling transients the received inductances are corrected at each step of the calculation according magnetization current change. The initial data is the dependence obtained by approximating the experimental data of the no-load test characteristic. In the modeling two models of a synchronous generator were compared, one of them on the basis of the Park-Gorev equations for an idealized electric machine, other model similar, but with the addition of the proposed submodel of saturation of the magnetic circuit. The synchronous generator model was obtained in the MatLab / Simulink simulation environment. The results of the simulation are correlated with the theoretical positions. The resulting transients are mismatched in either statics and dynamics. The proposed model can be useful in analyzing the operation of a synchronous generator automatic control system to obtain close to real experimental data transients.