UDC 004.9:004.75
New threats of information security or weapons of mass infection / Yu.M. Lysetskyi,
S.I. Bobrov // Mathematical Machines and Systems. – 2018. – N 1. – P. 41 – 50.
The problem of using Internet of Things, as a method of mass infections by information systems viruses is considered. One of the most dangerous influence means focused on the refusal of information systems maintenance is described as the main tool for the implementation of cyber-attacks. The recommendations on the organization of an integrated approach to information security and countering of cyber threats arising in connection with the mass using of IoT devices are given. It is shown that there are opportunities for effective counteraction to this new information security threat. Таbl.: 2. Figs.: 3. Refs.: 9 titles.
UDC 004.02
Instrumental remote monitoring tool for sensors indicators / Ye.V. Nikitenko,
Ye.V. Ryndych // Mathematical Machines and Systems. – 2018. – N 1. – P. 51 – 58.
It was developed the architecture of the automated tool that allows monitoring the status of the sensors indicators and gathering statistic information using modern wireless and mobile solutions and techniques. The tool consists of hardware and software which interact together with each other on the principle of the client-server model using a variety of communication protocols (HTTP, USART etc.). The test sample proving the correctness of the instrumental tool has been created. Figs.: 2. Refs.: 6 titles.
UDC 004.942
Formation of an array of input data under the classification of texts in information monitoring technology / M.S. Golub // Mathematical machines and systems. – 2018. – N1. – P. 59 – 66.
The article presents investigation results of information transformation from a form of the text message into the two-dimensional array of numerical characteristics. These characteristics are used as an array of input data (AID) when synthesizing the model-classifier by using inductive methods, in particular the multi-row algorithm of group method of data handling (GMDH). A new method for defining the list of informative text features that are adaptive to a given task and properties of the AID are suggested. Conditions for 100% correct classification of texts are created. This enables sufficient informativeness of AID in technologies of text message monitoring. Таbl.: 2. Figs.: 2. Refs.: 10 titles.
SIMULATION AND MANAGEMENT
UDC 658.52.011.56:621.771.23-413
Mathematical models of the flatness of plate rolling in relation to ACS TP / M.G. Ievlev // Mathematical machines and systems. – 2018. – N 1. – P. 67 – 77.
Theoretical and experimental studies of the flatness of plate rolling were considered in the article. Theoretical analysis and identification of mathematical models based on experimental data describing the sheet buckling parameters were carried out. The obtained results can be used in ACS TP of rolling stands. Figs.: 4. Refs.: 9 titles.
UDC 528.9
Web-system of forecasting of meteorological conditions for an arbitrary territory on detailed networks / I.V. Kovalets, S.Ya. Maistrenko, Т.O. Dontsov-Zagreba, S.M. Anulich, O.V. Khalchenkov, K.V. Khurtsilava, O.O. Polonskyi // Mathematical Machines and Systems. – 2018. – N 1. – P. 78 – 89.
It is developed information web technology that allows upon users’ request to forecast meteorological conditions at arbitrary territory with high resolution, on the basis of adaptation of modern meteorological model and web-technologies for providing model with input data, obtaining and visualization of results. Tabl.: 1. Figs.: 8. Refs.: 19 titles.
UDC 004.9
Theoretical justification of the choice of indicators, variables and indices of security monitoring / V.V. Biegun, P.P. Kropotov, V.F. Grechaninov // Mathematical machines and systems. – 2018. – N 1. – P. 90 – 100.
The problems of construction of security monitoring systems in Ukraine taking into account new government decisions about monitoring strategies based on a risk-oriented approach are considered. The necessity of situational centers technology and probabilistic models of hazardous processes and systems for the modules of analysis and forecast usage is substantiated. Tabl.: 2. Figs.: 6. Refs.: 19 titles.
UDC 621.396.4 (045)
Development of optimization method of branched trajectories in problems of calculating the reference motion of a two-stage unmanned demonstrator of hypersonic technologies / O.I. Lysenko, I.V. Alekseeva, O.M. Tachynina // Mathematical machines and systems. – 2018. – N 1. – P. 101 – 108.
A method of calculating the trajectory of a two-stage unmanned demonstrator of hypersonic technologies, consisting of an unmanned carrier aircraft and an unmanned orbital aircraft is proposed. The necessary conditions for phase coordinates and controls optimality at the branching trajectory structural transformations points of a two-stage unmanned demonstrator are formulated. Different cases for calculations of two-stage unmanned demonstrator motion trajectory optimization at the takeoff and stages-splitting motion phases of a demonstrator are considered. Fig.: 1. Refs.: 10 titles.
UDC 519.712.3
Two approaches to the assessment of the country risk / R.R. Rzayev, S.T. Babayeva // Mathematical machines and systems. – 2018. – N 1. – P. 109 – 122.
Two approaches to assessment of the country risk levels applied at weighted attributes of evaluative dimensions and fuzzy inference methods are considered. To obtain the final estimates of the country risk levels for an arbitrary set of alternatives these approaches are used on the base of expert conclusions regarding factors of country risk. The study is completed by comparative analysis of finale estimates of country risks. Таbl.: 6. Fig.: 1. Refs.: 7 titles.
UDC 519.85
Mathematical modeling of combinatorial configurations and application in optimization problems / O.S. Pichugina // Mathematical Machines and Systems. – 2018. – N 1. – P. 123 – 137.
In the paper, an approach to the construction of functional-analytic representations of finite point configurations being the images of sets of combinatorial configurations’ sets in the arithmetic Euclidean space is presented. A number of the representations for the Euclidean permutation configuration sets is constructed. A scheme of forming an equivalent model of an optimization problem on the general Euclidean permutation of vectors set as a discrete problem is proposed. Applicability of the results to placement problems for arbitrary dimension objects is demonstrated. Refs.: 30 titles.
UDC 629.735.05:621.3(045)
A mathematical model for digital avionics systems maintenance taking into account intermittent failures / A. Raza // Mathematical Machines and Systems. – 2018. – N 1. – P. 138 – 147.
Currently, the cost of avionics maintenance is about 30% of the total cost of aircraft maintenance. A great impact on the cost of avionics maintenance is provided by a high level of intermittent failures. The mathematical model for the calculation of the average availability and maintenance cost of continuously tested avionics line replaceable units’ subjected to permanent and intermittent failures is developed in this paper. Mathematical expressions are obtained for average availability of redundant avionics systems taking into account the number of spare line replaceable units in the airline's exchange fund. The dependence of average availability on the rate of permanent and intermittent failures is investigated. Figs.: 7. Refs.: 23 titles.
QUALITY, RELIABILITY AND CERTIFICATION OF COMPUTER TECHNIQUE AND SOFTWARE
