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Security is the challenge that world community will need to overcome for the Internet of Things (IoT) comes true. It needs to protect IoT users from known and potential attacks. The traditional approach for security system design is expected to fail, because most threats in IoT environment will be previously unseen and many IoT devices have constrained computing resources. The recent surveys of intrusion...
New model of multi-layer service network is discussed in the paper. Each server or any group of servers of a given layer of an hierarchical queuing network may be a customer in queuing systems of next layer. Conception of hypernet uses for representing structure of such multi-layer network, which we name as Q-hypernet. Some typical cases of Q-hypernet with possible applications are discussed along...
The work considers the mathematical aspects of one of the most fundamental problems of data analysis: search (choice) among a collection of objects for a subset of similar ones. In particular, the problem appears in connection with data editing and cleaning (removal of irrelevant (not similar) elements). We consider the model of this problem, i.e., the problem of searching for a subset of largest...
We suggest a new approach to optimization of the reliability of electric power system under market conditions, which involve confrontation of various interests of market participants. This feature makes unsuitable of traditional methods for optimization of the reliability of electric power system. We carry out the reliability analysis of the variants of development of electric power system based on...
In this article developed mathematical model is proposed to solve the problem of planning water-energy modes of the Novosibirsk HPP (Hydro Power Plant) in accordance with a predetermined optimality criterion satisfying all constraints. One of the possible versions of the model is presented in this paper. The optimality criterion of the model is ensured minimum water discharge fluctuations in the tail...
This paper addresses the problem of analyzing long-term strategies for commissioning of generating and dismantling capacities of electric power systems described by means of the nonclassical Volterra equation of the first kind. The paper offers a review of mathematical models designed for calculating forecast values of the input capacities of electric power systems for various strategies of the generating...
In this paper we obtained the formula for the common solution of Riccati equations. Here Riccati equations was solved for common cases. Results obtained have been compared with the conventional ones and a comment has been made on them.
The main goal of this paper is to study and to test the numerical methods for stochastic differential equations with solutions on a given smooth manifold. Second-order cylindrical surfaces such as elliptic, hyperbolic, and parabolic cylinders are chosen as manifolds in three-dimensional space provided that the phase space is two-dimensional space. The classes of stochastic differential equations are...
The known algorithm of mass flow rate determination via output pressure curves in gas production and transport systems has been generalized for the case of inner tube cross section changing in time and should be determined together with gas pressure and temperature. An example of calculations corresponds to a real case of gas field in permafrost region.
In this paper, we develop a hybrid approach to solve a production scheduling problem of special type. The approach is based on a general decomposition scheme proposed in earlier studies and is extended by a constructive greedy heuristic for medium term scheduling and a genetic algorithm for solving the auxiliary subproblem on a set of critical (bottleneck) processing units. The experimental study...
The article describes the Web-based data-processing system conceptual elements, architecture and software. The «Vibroseismic Earth Sounding» system manages field and computational experiments structured and unstructured data obtained during active vibroseismic monitoring experiments. The system provides users with search, computational, analytical and GIS services to effectively work with data.
Detecting anomalous traffic (and above all new ad-hoc attacks) with low false alarm rates is of primary interest in IP networks management. To this aim a key research topic in network security is represented by anomaly-based IDSs (Intrusion Detection Systems) thanks to their ability to face unknown attacks. Starting from more than a decade of research experience by the authors, the aim of this paper...
In many security systems, it is sufficient to monitor a certain territory with the same type of devices in such a way that each point of the territory falls into the coverage area of at least one device while minimizing the energy consumption of the devices. However, in some security systems, it is necessary to observe objects from a certain side. For example, to identify a person you need to see...
In the article the influence of precipitation and wind loads on a fiber optic cable suspended on the contact-line supports or power lines is considered. When the cable is subjected to the heaviest mode (ice with wind), the cable sags and returns (compressed) to the normal state according to the final modulus of elasticity, that is, there remains a residual elongation. We calculated the final sag at...
Models and methods for computer-aided design of functioning process of human-machine systems (FP HMS) based on the functional-structural theory and generalized structural method of prof. A.I. Gubinsky are considered. An approach to integrating FP HMS optimization problem models with simulation modeling and hybrid models (continuous behavior) is given. Use of explicit numerical methods with improved...
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