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RISS 인기검색어
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- 저자 : Avdeenko, T.V. (검색결과 2 건)
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Avdeenko, T.V.,Je, Hai-Gon The Youngnam Mathematical Society Korea 2000 East Asian mathematical journal Vol.16 No.2
The problem of solution uniqueness to the task of determining unknown parameters of mathematical models from input-output observations is studied. This problem is known as structural identifiability problem. We offer a new approach for testing structural identifiability of linear state space models. The approach compares favorably with numerous methods proposed by other authors for two main reasons. First, it is formulated in obvious mathematical form. Secondly, the method does not involve unfeasible symbolic computations and thus allows to test identifiability of large-scale models. In case of non-identifiability, when there is a set of solutions to the task, we offer a method of computing functions of the unknown parameters which can be determined uniquely from input-output observations and later used as new parameters of the model. Such functions are called parametric functions capable of estimation. To develop the method of computation of these functions we use Lie group transformation theory. Illustrative example is given to demonstrate applicability of presented methods.
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Advances of Isomerizing-hydrogenating Properties of CoMo Catalysts Supported on ASA-Al2O3
E. A. Avdeenko,K. A. Nadeina, T. V. Larina,V. P. Pakharukova,E. Yu. Gerasimov,I. P. Prosvirin,A. A. Gabrienko,Yu. V. Vatutina,O. V. Klimov,A. S. Noskov 대한화학회 2022 대한화학회지 Vol.66 No.5
Because hydrotreating (HDT) of FCC gasoline is one of the important processes used to prepare such gasoline for blending, the development of a catalyst for this process is of great interest. Currently, the industrial HDT of FCC gasoline consists of two stages and the creation of a new catalyst for one-stage HDT will make this process more efficient. Recently, our group has developed the CoMo/Al2O3-ASA catalyst and studied the influence of Si/Al ratio on the target reactions of HDT process. Despite the high selectivity and activity, the catalyst with ASA is not applicable in industry because of its low strength. The present work moves forward to study the influence of the ASA content in the catalyst support and clarify the possibility to develop the catalyst that combines high activity and selectivity in HDT reactions with successful performance. Here we show that the CoMo catalyst with ASA/Al2O3 molar ratio 1/1 in the support is the best combination for FCC gasoline hydrotreatment due to exceptional properties of the catalyst composition.
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