Showing papers by "Indian Institute of Technology, Jodhpur published in 1995"
01 Nov 1995
TL;DR: The paper investigates the application of inversion of a radial basis function network (RBFN) to nonlinear control problems for which the structure of the nonlinearity is unknown and shows that the performance of the controller based on the proposed network inversion scheme is efficient.
Abstract: The paper investigates the application of inversion of a radial basis function network (RBFN) to nonlinear control problems for which the structure of the nonlinearity is unknown. Initially, the RBF network is trained to learn the forward dynamics of the plant. Two different controller structures are then proposed based on this identified RBFN model. In one scheme, a feedback control law is derived based on the input prediction by inversion of the RBFN model so that the system is Lyapunov stable. The second kind of controller structure predicts the feedforward control action, while the fixed controller actuates the feedback stabilising signal. An extended Kalman filtering based algorithm is employed to carry out the network inversion during each sampling interval. Two examples are presented to verify the proposed scheme. Simulation results show that the performance of the controller based on the proposed network inversion scheme is efficient.
31 citations
TL;DR: In this paper, the first order first-order Michaelis-Menten-type kinetics were observed with respect to DL-methionine (MT) bybis(2,2′-bipyridyl)copper(II) permanganate (BBCP) to the corresponding sulphoxide is first order in BBCP.
Abstract: The oxidation ofDL-methionine (MT) bybis(2,2′-bipyridyl)copper(II) permanganate (BBCP) to the corresponding sulphoxide is first order in BBCP. Michaelis-Menten-type kinetics were observed with respect to MT. The formation constant of the intermediate complex and the rate constant for its decomposition were evaluated. The thermodynamic and activation parameters were also evaluated. The reaction is catalysed by H+ but 2,2′-bipyridine does not affect the reaction rate. A mechanism is proposed.
6 citations
TL;DR: The close agreement between the observed kH/kD = 7.1 and the theoretically calculated value (7.0), based on the stretching frequencies of C-H and C-D bonds in the free molecule, indicates an outer-sphere mechanism.
Abstract: The oxidation of formate ion by alkaline osmium tetroxide, such that [HCOinf2p−] ≫ [OsVII], exhibits first-order dependence in [OsVII], an order less than unity in [HCOinf2p−], and zero-order in [OH−]. HCO2− reacts as an ion-pair formed with an alkali metal ion and [OsO4(OH)2]2− is the reactive species of OsVII. The formation of an intermediate OsVII-HCO2M complex is substantiated by the rapid-scan spectra of the reaction mixture. Anions (Cl−, ClOinf4p−) have no effect on the rate. The close agreement between the observed kH/kD = 7.1 and the theoretically calculated value (7.0), based on the stretching frequencies of C-H and C-D bonds in the free molecule, indicates an outer-sphere mechanism.
1 citations
DOI•
01 Jun 1995
TL;DR: In this article, the reaction is promoted by hydrogen ions; the hydrogen-ion dependence has the formkobs=c+d[H+], where H+ is the primary kinetic isotope effect.
Abstract: Oxidation of nine primary aliphatic alcohols by pyridinium bromochromate (PBC) leads to the formation of corresponding aldehydes. The reaction is of overall second order, and of first order with respect to the each reactant. The reaction is promoted by hydrogen ions; the hydrogen-ion dependence has the formkobs=c+d[H+]. The oxidation of [1, 1-2H2] ethanol (MeCD2OH) exhibited a substantial primary kinetic isotope effect. The reaction was studied in nineteen organic solvents and the effect of solvent was analysed using Taft's and Swein's multiparametric equations. The oxidation is susceptible to both the polar and steric effects of the substituents. A suitable mechanism has been proposed.
1 citations