Institute of service, tourism and design (branch) of the North- Caucasus Federal University
Author list of organization
List of articles written by the authors of the organization
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ANALYSIS APPROACHES TO EVALUATION OF INFORMATION PROTECTION
Description
The article is devoted to an actual problem of information systems’ security assessment and the importance of objective quantitative assessment results receiving. The author offers the creation of complex system of information security with system approach, which will be used at each stage of information system’s life cycle. On the basis of this approach the author formulates the general scheme of an information security assessment of information system, and also the principles of an assessment’s carrying out method choice. In this work the existing methods of a quantitative assessment based on object-oriented methods of the system analysis, and also the objectivity of the received estimates on the basis of this approach are considered. On the basis of the carried-out analysis, serious shortcomings of the used modern techniques of an information systems’ security assessment are allocated, then the idea of the scientific and methodical device providing the increase of objectivity and complexity of an information assessment means on the basis of expert data formalization creation necessity was formulated. The possibility of this approach application for expeditious receiving a quantitative information security assessment in the conditions security threat’s dynamics changes, functioning and developments of information system is considered. The problem definition of automated information systems’ security assessment is executed, and the general technique of protection means of information in systems of this type was formulated
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ANALYSIS OF QUALITY INDICATORS OF AUTOMATIC CONTROL SYSTEMS WITH NONLINEAR APPROXIMATION CONTROL LAW
Description
The subject of research of this work was the study of the quality of control processes in a nonlinear automatic control system with an approximating the control law. In the known published works there are no results of such studies, which makes it difficult to synthesis a nonlinear control system for multimode objects in applied biotechnology, including technological objects of the agro-industrial complex. A comparative analysis of the quality of regulation in the transient and steady-state regimes is carried out. It is shown that the approximation method used for the synthesis of the nonlinear control law provides a linear dependencies in steady-state and close to them modes in combination with relay modes in transient regimes, which is a positive factor for improving the quality of regulation in multimode control systems. It does not necessary to determine the moments of switching the dependencies in the control law when changing modes
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