Mais Farhadov

Mais Farhadov
Institute of Control Sciences | IPU · Automated Queuing Systems and Signal Prosesing

Professor

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33
Publications
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59
Citations
Introduction
Skills and Expertise

Publications

Publications (33)
Article
Full-text available
As a scientific term "risk'' originally appeared in insurance mathematics and meant the "ruin probability'' in a "collective risk'' model of an insurance company. Recently, this term has become widespread in different spheres of human activity and has been applied to various models of "individual risk". At the same time, despite its increasing popu...
Article
Full-text available
Environmental safety issues are of particular importance when we design and operate underwater transport systems. To ensure the transport systems function safely, special systems to monitor their condition are being created. Underwater pipeline monitoring systems should continuously operate to detect and prevent emergency and pre-emergency situatio...
Chapter
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The chapter utilizes the continuous-time Markov chain for modeling the processes of the gradual aging with maintenance on a finite discrete set of an intermediate failure states. The transitions occur according to the birth-and-death process, and the unit fails completely after visiting the last available state. The unit of a multiple and single us...
Article
Full-text available
We consider a two-channel Markov queueing system with unreliable heterogeneous servers and a common queue. The claims are distributed among the servers with a threshold control policy. According to this policy, a server with the smaller average usage cost must be busy if the system itself is not empty, and the other server is used if the number of...
Conference Paper
Full-text available
Inverse sets [1] defined in 2011 and, independently, in [2] (2012) provide a concise mathematical description of indexing methods that deal efficiently with vast amounts of data. On the other hand, traditional, non-indexing machine learning methods are far more computationally demanding. For instance, aircraft engine prediction maintenance needs an...
Conference Paper
One of the modifications of the mathematical models used to describe processes in multi-service communication networks and telecommunication systems is the queueing system with heterogeneous servers. As a rule, for simulation of such processes the system with non-Poisson input flows is used. We consider the queuing system with infinite number of se...
Conference Paper
Heterogeneous servers which can differ in service speed and reliability are getting more popular in modeling of modern communication systems. For a two-server queueing system with unreliable servers the allocation of customers between the servers is performed via a threshold control policy which prescribes to use the fastest server whenever it is f...
Conference Paper
Full-text available
In the paper, the retrial queueing system of M/M/1 type with negative calls is considered. The system of Kolmogorov equations for the system states process is derived. The method of asymptotic analysis is proposed for the system solving under the heavy load condition. The theorem about the gamma form of the asymptotic characteristic function of the...
Article
Full-text available
One of the modifications of the mathematical models used to describe processes in multi-service communication networks and telecom-munication systems is the queueing system with heterogeneous servers. As a rule, for simulation of such processes the system with non-Poisson input flows is used. We consider the queuing system with infinite number of s...
Conference Paper
We investigate the simulation methods for a multiphase queuing network with non-Poisson flows. Specifically, we study how the network internal flows react to a change of the network flow control parameters. The parameters are: the number of phases, system load, queue capacity, time interval distribution between applications. Also, we investigate ho...
Conference Paper
We propose Markov and non-Markov probabilistic models of how flows of annihilating particles interact, find the probability distribution of the number of positive applications in the model, and we present asymptotic results for the case of high intensity incoming flows. Then we study a system with non-exponential service where, using asymptotic ana...
Article
Full-text available
The paper describes the key concepts of a word spotting system for Russian based on large vocabulary continuous speech recognition. Key algorithms and system settings are described, including the pronunciation variation algorithm, and the experimental results on the real-life telecom data are provided. The description of system architecture and the...
Conference Paper
Full-text available
The model of retail outlet in form of queueing system of M/M/1/\(\infty \) type with request rejection is proposed. The output flow of the system and the rejected request flow are researched. Average number of events occurred in these flows is determined. In conditions of increasing observation time the asymptotic distributions of probabilities of...
Article
A controllable tandem queueing system consists of two nodes in tandem of the type M/M/ni and a controller. Customers arrive to the controller, who allocates them between the nodes. After service completion at node 2 the controller can allocate the customer waiting at node 1 to node 2. With probability p after a service completion at node 1 a failur...
Conference Paper
This report describes the implementation of a speech access system for objects of electronic map. This system is works with the use of the computer-based recognition of words and phrases in the Azerbaijani language. The Recognition process is based on the recognition of another language which is phonetically close to Azerbaijani. For the purpose of...
Article
Full-text available
In this paper, we consider mathematical models for analysis and optimization of call centers of modern architecture having a self-service facility on the base of computer speech recognition. In such centers, service is provided by both operators and self-service ports. It is shown that the optimal policy for queue control improves service character...

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Projects

Projects (2)
Project
Organization of a joint seminar between the French National Academy of Technology and CNRS (French National Centre for Scientific Research), which stand 6 December in Paris, Campus Gérard Mégie (CNRS headquarters). Main topics: History of modeling, modeling in some important areas, such as industry, economics, life sciences (eg genomics, ecosystems), earth sciences (eg climate), social sciences . Common problems: predictability, sensitivity to disturbance, relations with the observations and experiments, the necessity or not of HPC (High Performance Computing), modeling to help the decision, modeling to help scientific thinking, modeling in practice interdisciplinary, creating and managing modeling laboratories. Further, a book will be published as soon as possible, putting together the diverse contributions.