排序方式: 共有63条查询结果,搜索用时 62 毫秒
1.
H.M. Mahmudov M.K. Ismayilova S.A. Hasanova S.M. Aliyev G.E. Isayeva O.E. Akberov 《辐射效应与固体损伤》2016,171(7-8):630-635
The aim of this study was to investigate the regularities of molecular hydrogen formation from water dispersing Al2O3 nanoparticles irradiated with gamma ray. It was established that formed molecular hydrogen’s yield changed depending on the size of the catalyst, so that yield of molecular hydrogen formed on the surface with small size is 1.4–1.6 times greater than the one with big size. Equal distribution of nanocatalyst in water medium and much more adsorption of water molecule on the catalyst surface result in more efficient radiolysis process. 相似文献
2.
Elimhan N. Mahmudov 《Optimization Letters》2013,7(5):871-891
The present paper is devoted to an optimal control problem given by hyperbolic discrete (P D ) and differential inclusions (P C ) of generalized Darboux type and ordinary discrete inclusions. The results are extended to non-convex problems. An approach concerning necessary and sufficient conditions for optimality is proposed. In order to formulate sufficient conditions of optimality for problem (P C ) the approximation method is used. Formulation of these conditions is based on locally adjoint mappings. Moreover for construction of adjoint partial differential inclusions the equivalence theorems of locally adjoint mappings are proved. One example with homogeneous boundary conditions is considered. 相似文献
3.
Elimhan N. Mahmudov 《Journal of Optimization Theory and Applications》2018,177(2):345-375
The present paper studies a new class of problems of optimal control theory with Sturm–Liouville-type differential inclusions involving second-order linear self-adjoint differential operators. Our main goal is to derive the optimality conditions of Mayer problem for differential inclusions with initial point constraints. By using the discretization method guaranteeing transition to continuous problem, the discrete and discrete-approximation inclusions are investigated. Necessary and sufficient conditions, containing both the Euler–Lagrange and Hamiltonian-type inclusions and “transversality” conditions are derived. The idea for obtaining optimality conditions of Mayer problem is based on applying locally adjoint mappings. This approach provides several important equivalence results concerning locally adjoint mappings to Sturm–Liouville-type set-valued mappings. The result strengthens and generalizes to the problem with a second-order non-self-adjoint differential operator; a suitable choice of coefficients then transforms this operator to the desired Sturm–Liouville-type problem. In particular, if a positive-valued, scalar function specific to Sturm–Liouville differential inclusions is identically equal to one, we have immediately the optimality conditions for the second-order discrete and differential inclusions. Furthermore, practical applications of these results are demonstrated by optimization of some “linear” optimal control problems for which the Weierstrass–Pontryagin maximum condition is obtained. 相似文献
4.
In the present paper we propose q-analogue of the well known Sz??sz-Kantorovich operators. We study local approximation as well as weighted approximation properties of these new operators. 相似文献
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6.
Nazim I. Mahmudov 《Mediterranean Journal of Mathematics》2010,7(3):297-311
In the present paper, we introduce q-parametric Szász-Mirakjan operators. We study convergence properties of these operators S
n,q
(f). We obtain inequalities for the weighted approximation error of q-Szász-Mirakjan operators. Such inequalities are valid for functions of polynomial growth and are expressed in terms of weighted
moduli of continuity. We also discuss Voronovskaja-type formula for q-Szász-Mirakjan operators. 相似文献
7.
Nazim I. Mahmudov 《Central European Journal of Mathematics》2010,8(4):816-826
In the present paper we introduce and investigate weighted statistical approximation properties of a q-analogue of the Baskakov and Baskakov-Kantorovich operators. By using a weighted modulus of smoothness, we give some direct
estimations for error in the case 0 < q < 1. 相似文献
8.
Nazim I. Mahmudov 《Journal of Global Optimization》2013,56(2):317-326
We study the exact null controllability for the abstract evolution equations in Hilbert spaces. Assuming the exact null controllability of the corresponding linearized equation we obtain sufficient conditions for the exact null controllability of the semilinear evolution equation. The results we obtained are generalization and continuation of the recent results on this issue. In the end, an example is given to show the application of our result. 相似文献
9.
N. I. Mahmudov 《随机分析与应用》2013,31(1):79-95
Abstract In this paper using a Picard type approximation, we present the existence and uniqueness theorems for mild solutions of the semilinear neutral SDEs in Hilbert spaces whose coefficients satisfy non-Lipschitz condition. 相似文献
10.
Dr. Atash V. Gurbanov Dr. Maxim L. Kuznetsov Dr. Kamran T. Mahmudov Prof. Armando J. L. Pombeiro Prof. Giuseppe Resnati 《Chemistry (Weinheim an der Bergstrasse, Germany)》2020,26(65):14833-14837
Intramolecular chalcogen bonding in arylhydrazones of sulfamethizole is strengthened by conjugation in the π-system of a noncovalent five-membered ring. The S⋅⋅⋅O distance in the sulfamethizole moiety of these compounds ranges from 2.698(3) to 2.806(15) Å, which indicates its strong dependence on the attached arylhydrazone fragments. Information on the nature of the intramolecular chalcogen bond was afforded by DFT calculations. 相似文献