The optimality of the velocity-gradient method in the problem of controlling the escape from a potential well

2007 ◽  
Vol 71 (6) ◽  
pp. 809-818
Author(s):  
A.R. Akhmetzhanov ◽  
A.A. Melikyan ◽  
A.L. Fradkov
Keyword(s):  
Gradient Method ◽  
Velocity Gradient ◽  
Potential Well

scholarly journals Parametric synthesis of stabilizing neurocular control of a technological module

2021 ◽  
Vol 2094 (5) ◽  
pp. 052066
Author(s):  
Viktor Sizykh ◽  
Aleksei Daneev ◽  
Roman Oboltin
Keyword(s):  
Gradient Method ◽  
Differential Form ◽  
Velocity Gradient ◽  
Sliding Modes ◽  
Parametric Synthesis ◽  
New Approach ◽  
Physical Systems ◽  
Technological Processes ◽  
Technological Module

Abstract The article proposes a new approach to combined parametric synthesis (synthesis in real or accelerated time) of neuroregulators of multidimensional and multi-connected physical systems and technological processes based on the application of the velocity gradient method in differential form and the theory of sliding modes.

GIANT RESONANCES IN A POTENTIAL WELL : A SEMICLASSICAL DESCRIPTION

1987 ◽  
Vol 48 (C2) ◽  
pp. C2-19-C2-26
Author(s):  
X. VIÑAS ◽  
A. GUIRAO
Keyword(s):  
Potential Well ◽  
Giant Resonances

Effect of Temperature, Velocity Gradient and I.V. Heparin on in Vitro Blood Coagulation and Platelet Aggregation

1967 ◽  
Vol 17 (01/02) ◽  
pp. 112-119 ◽  
Author(s):  
L Dintenfass ◽  
M. C Rozenberg
Keyword(s):  
Blood Coagulation ◽  
Velocity Gradient ◽  
Elevated Temperatures ◽  
Morphological Changes ◽  
Effect Of Temperature ◽  
Clotting Time ◽  
Progressive Change ◽  
Aggregation Of Platelets ◽  
Microscopic Techniques

SummaryA study of blood coagulation was carried out by observing changes in the blood viscosity of blood coagulating in the cone-in-cone viscometer. The clots were investigated by microscopic techniques.Immediately after blood is obtained by venepuncture, viscosity of blood remains constant for a certain “latent” period. The duration of this period depends not only on the intrinsic properties of the blood sample, but also on temperature and rate of shear used during blood storage. An increase of temperature decreases the clotting time ; also, an increase in the rate of shear decreases the clotting time.It is confirmed that morphological changes take place in blood coagula as a function of the velocity gradient at which such coagulation takes place. There is a progressive change from the red clot to white thrombus as the rates of shear increase. Aggregation of platelets increases as the rate of shear increases.This pattern is maintained with changes of temperature, although aggregation of platelets appears to be increased at elevated temperatures.Intravenously added heparin affects the clotting time and the aggregation of platelets in in vitro coagulation.

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