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Databases : Sciencedirect ✕Faculty / Institute : Fen Fakültesi ✕
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Method of additional argument in problems of optimal control

Ramiz RAFATOV

The problem of control of the process described by the nonlinear differential equation with partial derivatives of the first order, with conditions at t 0 and in a sequence n of points x1 < x2 ... < xn is solved. The criterion of quality of control is the integrated quadratic functional, which depends on a final state of system and set n of controlling parameters. The method of increment of functional is applied to reception of conditions of optimality, and the method of additional argument (MAA) is applied for the decision of the nonlinear equations with partial derivatives.

Proceedings Paper 2004 Fen Fakültesi IFAC Proceedings Volumes (IFAC-PapersOnline)37 ( 17 ) 9 Views
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Fejér-type positive operator based on Takenaka-Malmquist system on unit circle

Fahreddin ABDULLAYEV

Let φ={φk}k=−∞∞ denote the extended Takenaka–Malmquist system on unit circle T and let σn,φ(f), f∈L1(T), be the Fejér-type operator based on φ, introduced by V. N. Rusak. We give the convergence criteria for σn,φ(f) in Banach space C(T). Also we prove the Voronovskaya-type theorem for σn,φ(f) on class of holomorphic functions representable by Cauchy-type integrals with bounded densities. Keywords: Holomorphic functions; Takenaka–Malmquist system; Fejér type operator; Blaschke product; Frostman condition

Article 2023 Fen Fakültesi Journal of Mathematical Analysis and Applications529 ( 2 ) 48 Views
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Uniformities for Wallman compactifications and realcompactifications

Asılbek ÇEKEEV

The natural methods of uniform topology for construction of Wallman compactifications and Wallman realcompactifications are developed. Results on partial order and relations of dimensions in the lattice of compactifications are presented. The construction of the maximal compactification among compactifications of X with fixed realcompactification is given. - MSC 54E15; 54D35; 54D60; 54F45 . - Keywords: Uniformity; (Wallman, β-like) compactification; (Wallman) realcompactification; Normal base; Dimension

Proceedings Paper 2016 Fen Fakültesi Topology and its Applications201 90 Views
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Method of spherical harmonic series in the problem of minimization of atmosphere pollution by fractions of harmful admixtures

Ramiz RAFATOV

The problem of minimization of atmosphere pollution by fractions of harmful admixtures is studied. It is supposed that a controlled object is described by non-stationary integral–differential transfer equation with special boundary conditions and control parameters, which are included in the right part of equation as delta-functions. Minimized integral quadratic functional characterizes energy expenditure for control and depends on the average squared deflection of fraction concentration from the desired final state. Optimal conditions are obtained with the help of Pontryagin’s maximum princip ...More

Proceedings Paper 2004 Fen Fakültesi Mathematics and Computers in Simulation67 ( 4–5 ) 95 Views
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An ethnoveterinary study of wild medicinal plants used by the Kyrgyz farmers

Nurbek ALDAYAROV | Askarbek TÜLÖBAEV | Ruslan SALIKOV | Carkınay CUMABEKOVA | Bermet KIDIRALİYEVA | Nurcamal ÖMÜRZAKOVA | Gülbübü KURMANBEKOVA | Nazgül İMANBERDİYEVA | Bircan USUBALİYEV | Bakıt BORKOYEV | Kalıypa SALİYEVA | Kadırbay ÇEKİROV

Ethnopharmacological relevance: In their centuries-old nomadic life, since their livestock was the backbone of their lives, the Kyrgyz people used a variety of wild medicinal plants for ethnoveterinary practices. However, the plants used for the treatment of livestock ailments never have been recorded, except rarely in local publications. In this study, we present the HSHR (homemade single species herbal remedy reports), their methods of preparation and application, and the livestock ailments for which these remedies were used.Aims: The collect data from the five different high-altitude valley ...More

Article 2022 Fen Fakültesi Journal of Ethnopharmacology285 65 Views
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Ultrafilter-completeness on zero-sets of uniformly continuous functions

Asılbek ÇEKEEV

The various types of ultrafilter-completeness on zero-sets of uniformly continuous functions are introduced, their properties are studied and characterizations in the category are given.

Proceedings Paper 2019 Fen Fakültesi Topology and its Applications252 111 Views
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Identification of Dalapon degrading bacterial strain, Psychrobacter sp. TaeBurcu001 isolated from Antarctica

Yılmaz KAYA

Extreme microorganism has gained interest because of their special contribution to the environmental and industrial biotechnology, particularly psychrophilic microorganisms which can live and thrive at lower temperatures. They produce enzymes with great potential to adapt to extreme conditions. In this study, a novel psychrophilic bacterial strain designated as TaeBurcu001 grew (optimally at 5.C) on a chemically defined medium containing dalapon (refer to as 2,2-dichloropropionic acid, 2,2-DCP) as the sole carbon source. TaeBurcu001 was isolated from Galindez Island, Antarctica. Phylogenetic a ...More

Article 2021 Fen Fakültesi Polar Science28 ( Special Issue ) 114 Views
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The Dieudonne tau-complete spaces and free topological groups of uniform spaces

Asılbek ÇEKEEV

For a Tychonoff space X, the Dieudonne tau-completion of X, denoted by mu TX, is investigated. The space mu TX is defined as the completion of X with respect to the uniformity uTX, where uTX is generated by all continuous mappings of X to metric spaces of weight

Article 2020 Fen Fakültesi Topology and its Applications281 ( Special Issue ) 76 Views
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