caa a22 4500 606189637 CHVBK 20210128100851.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1007/s10891-015-1213-7 doi (NATIONALLICENCE)springer-10.1007/s10891-015-1213-7 Kuliev S. Institute of Control Systems, National Academy of Sciences of Azerbaijan, 9 B. Vakhabzade Str., AZ1141, Baku, Azerbaijan aut Numerical Method of Solution of the Coefficient-Inverse Problem for Unsteady Motion in an Oil Pipeline [Elektronische Daten] [S. Kuliev] Consideration is given to the approach to identification of the coefficient of hydraulic resistance of a linear portion of a main pipeline in transporting raw hydrocarbons. The problem of identification is reduced to a class of finite-dimensional-optimization problems. To solve them, the author proposes efficient numerical methods of finite-dimensional optimization of first order. For this purpose, in the work, the author derives formulas for the components of the gradient of the target functional in the space of identified parameters. The obtained values of the optimized vector can be used for construction of the identified function from any class of functions with interpolation and approximation methods. Results of the conducted numerical experiments are given. Springer Science+Business Media New York, 2015 distributed system nationallicence coefficient of hydraulic resistance nationallicence inverse problem nationallicence identification problem nationallicence conjugate problem nationallicence functional gradient nationallicence Journal of Engineering Physics and Thermophysics Springer US; http://www.springer-ny.com 88/2(2015-03-01), 486-496 1062-0125 88:2<486 2015 88 10891 https://doi.org/10.1007/s10891-015-1213-7 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10891-015-1213-7 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Kuliev S. Institute of Control Systems, National Academy of Sciences of Azerbaijan, 9 B. Vakhabzade Str., AZ1141, Baku, Azerbaijan aut NATIONALLICENCE 773 0- Journal of Engineering Physics and Thermophysics Springer US; http://www.springer-ny.com 88/2(2015-03-01), 486-496 1062-0125 88:2<486 2015 88 10891