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Journal articles on the topic 'Multiparametric equations'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Rupal, Kumbhat, Sharma Vinita, and K. Banerji Kalyan. "Kinetics and mechanism of the oxidation of formic and oxalic acids by quinolinium bromochromate." Journal of Indian Chemical Society Vol. 80, Sep 2003 (2003): 815–19. https://doi.org/10.5281/zenodo.5837471.

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Department of Chemistry, J. N. V. University, Jodhpur-342 005, India <em>E-mail : </em>banerjikk@rediffmail.com                               <em>Fax : </em>91-0291-2742977 <em>Manuscript received </em>6 <em>September 2002, revised 25 February 2003, accepted 16 April 2003</em> Kinetics and mechanism of oxidation of formic and oxalic acids by quinolinium bromochromate (QBC) have been studied in DMSO. The main product of oxidation is carbon dioxide

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2

Papamichael, Emmanuel M., and Leonidas G. Theodorou. "Necessary auxiliary background for efficient use of an existing computer program of non-parametric fitting of nonlinear equations." Brazilian Archives of Biology and Technology 52, no. 2 (2009): 437–48. http://dx.doi.org/10.1590/s1516-89132009000200022.

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This work constituted a significant contribution for more efficient use of a valuable computer program of non-parametric fitting of nonlinear multiparametric equations to experimental data. However, prerequisite in this context was the transformation of nonlinear multiparametric equations into linear hyperplane forms before their incorporation within the computer program; this latter was decisive and a matter of proper programming practice. Herein, a series of widely used equations useful in different fields of chemical processes, in biochemistry and/or in biotechnology, along with their suita

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3

Mid, Ernie Che, and Vivek Dua. "Fault Detection in Wastewater Treatment Systems Using Multiparametric Programming." Processes 6, no. 11 (2018): 231. http://dx.doi.org/10.3390/pr6110231.

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In this work, a methodology for fault detection in wastewater treatment systems, based on parameter estimation, using multiparametric programming is presented. The main idea is to detect faults by estimating model parameters, and monitoring the changes in residuals of model parameters. In the proposed methodology, a nonlinear dynamic model of wastewater treatment was discretized to algebraic equations using Euler’s method. A parameter estimation problem was then formulated and transformed into a square system of parametric nonlinear algebraic equations by writing the optimality conditions. The

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4

Muravnik, Andrey B. "Multidimensional Hyperbolic Equations with Nonlocal Potentials: Families of Global Solutions." Mathematics 12, no. 13 (2024): 2091. http://dx.doi.org/10.3390/math12132091.

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In spaces of arbitrary dimensions, hyperbolic differential–difference equations with potentials undergoing translations along arbitrary spatial directions are investigated. The fundamental novelty of this study is that, unlike previous investigations, no restrictions are imposed on the symbol of the differential–difference operator contained in the equation. For the investigated equation, we succeed to explicitly construct a multiparametric family of classical global solutions.

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Żur, Krzysztof, and Piotr Jankowski. "Multiparametric Analytical Solution for the Eigenvalue Problem of FGM Porous Circular Plates." Symmetry 11, no. 3 (2019): 429. http://dx.doi.org/10.3390/sym11030429.

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Free vibration analysis of the porous functionally graded circular plates has been presented on the basis of classical plate theory. The three defined coupled equations of motion of the porous functionally graded circular/annular plate were decoupled to one differential equation of free transverse vibrations of plate. The one universal general solution was obtained as a linear combination of the multiparametric special functions for the functionally graded circular and annular plates with even and uneven porosity distributions. The multiparametric frequency equations of functionally graded por

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6

Contreras, Orge Rodríguez, Alberto Reyes Linero, Bladimir Blanco Montes, and Primitivo B. Acosta Humánez. "Transcritical Bifurcations and Algebraic Aspects of Quadratic Multiparametric Families." WSEAS TRANSACTIONS ON MATHEMATICS 20 (April 27, 2021): 186–95. http://dx.doi.org/10.37394/23206.2021.20.20.

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This article reveals an analysis of the quadratic systems that hold multiparametric families therefore, in the first instance the quadratic systems are identified and classified in order to facilitate their study and then the stability of the critical points in the finite plane, its bifurcations, stable manifold and lastly, the stability of the critical points in the infinite plane, afterwards the phase portraits resulting from the analysis, moreover Algebraic aspects are also included such that hamiltonian cases and Galois differential groupes. It should be noted that these families have asso

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7

Cimpoiasu, Rodica, Radu Constantinescu, and Alina Streche Pauna. "Solutions of the Bullough–Dodd Model of Scalar Field through Jacobi-Type Equations." Symmetry 13, no. 8 (2021): 1529. http://dx.doi.org/10.3390/sym13081529.

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A technique based on multiple auxiliary equations is used to investigate the traveling wave solutions of the Bullough–Dodd (BD) model of the scalar field. We place the model in a flat and homogeneous space, considering a symmetry reduction to a 2D-nonlinear equation. It is solved through this refined version of the auxiliary equation technique, and multiparametric solutions are found. The key idea is that the general elliptic equation, considered here as an auxiliary equation, degenerates under some special conditions into subequations involving fewer parameters. Using these subequations, we s

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8

FREIRE, E., L. PIZARRO, A. J. RODRÍGUEZ-LUIS, and F. FERNÁNDEZ-SÁNCHEZ. "MULTIPARAMETRIC BIFURCATIONS IN AN ENZYME-CATALYZED REACTION MODEL." International Journal of Bifurcation and Chaos 15, no. 03 (2005): 905–47. http://dx.doi.org/10.1142/s0218127405012521.

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An exhaustive analysis of local and global bifurcations in an enzyme-catalyzed reaction model is carried out. The model, given by a planar five-parameter system of autonomous ordinary differential equations, presents a great richness of bifurcations. This enzyme-catalyzed model has been considered previously by several authors, but they only detected a minimal part of the dynamical and bifurcation behavior exhibited by the system. First, we study local bifurcations of equilibria up to codimension-three (saddle-node, cusps, nondegenerate and degenerate Hopf bifurcations, and nondegenerate and d

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9

Boricic, Zoran, Dragisa Nikodijevic, Dragica Milenkovic, Zivojin Stamenkovic, Dragan Zivkovic, and Milos Jovanovic. "Unsteady plane MHD boundary layer flow of a fluid of variable electrical conductivity." Thermal Science 14, suppl. (2010): 171–82. http://dx.doi.org/10.2298/tsci100522024b.

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This paper is devoted to the analysis of unsteady plane laminar magnetohydrodynamic (MHD) boundary layer flow of incompressible and variable electrical conductivity fluid. The present magnetic field is homogenous and perpendicular to the body surface. Outer electric filed is neglected and magnetic Reynolds number is significantly lower then one i.e. considered problem is in induction-less approximation. Free stream velocity is an arbitrary differentiable function. Fluid electrical conductivity is decreasing function of velocity ratio. In order to solve the described problem multiparametric (ge

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10

Yang, Xiaoliu, Zetao Li, Qingfang Zhang, Qinmu Wu, and Linli Yang. "A Nonlinear Adaptive Observer-Based Differential Evolution Algorithm to Multiparameter Fault Diagnosis." Mathematical Problems in Engineering 2020 (May 7, 2020): 1–12. http://dx.doi.org/10.1155/2020/4531075.

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In this paper, a novel adaptive diagnosis scheme is proposed for multiparametric faults of nonlinear systems by using the model and intelligent optimization-based approaches. The key idea of the proposed method is to analyze the correlation of the output signals between the real system and the fault identification system instead of residual. A new adaptive scheme is built based on an adaptive observer and differential evolution algorithm. Meanwhile, the conditions of detectability and identifiability of faults are analyzed. The isolation and estimation of the multiparametric fault are formulat

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11

VINITA, SHARMA, K. SHARMA PRADEEP, and K. BANERJI KALYAN. "Kinetics and Mechanism of the Oxidation of Methionine by Pyridinium Chlorochromate." Journal of Indian Chemical Society Vol. 74, Aug 1997 (1997): 607–9. https://doi.org/10.5281/zenodo.5891067.

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Department of Chemistry, J. N. V. University, Jodhpur-342 005 <em>Manuscript received 19 March 1996, accepted 17 July 1996</em> The oxidation of methionine by pyridinium chlorochromate (PCC) leads to the formation of the corresponding sulphoxide. The reaction is first order with respect to PCC. Michaelis-Menten type kinetics have been observed with respect to methionine. The reaction has been studied in 19 organic solvents and the solvent effect has been analysed using multiparametric equations. A suitable mechanism has been proposed.

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Aksenov, A. V., and A. D. Polyanin. "GROUP ANALYSES, REDUCTIONS AND EXACT SOLUTIONS OF MONGE–AMPERE EQUATION OF MAGNETIC HYDRODYNAMICS." Дифференциальные уравнения 60, no. 6 (2024): 750–63. http://dx.doi.org/10.31857/s0374064124060032.

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We study the Monge–Amp`ere equation with three independent variables which occurs in electron magnetohydrodynamics. A group analysis of this strongly nonlinear partial derivative equation is carried out. An eleven-parameter transformation preserving the form of the equation is found. A formula is obtained that makes it possible to construct multiparametric families of solutions based on simpler solutions. Two-dimensional reductions leading to simpler partial differential equations with two independent variables. One-dimensional reductions are described, which make it possible to obtain self-si

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13

Golubeva, V. A., and V. P. Leksin. "Rigidity Theorems for Multiparametric Deformations of Algebraic Structures, Associated with the Knizhnik–Zamolodchikov Equations." Journal of Dynamical and Control Systems 13, no. 2 (2007): 161–71. http://dx.doi.org/10.1007/s10883-007-9016-6.

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14

Girometti, Rossano, Marco Andrea Signor, Martina Pancot, Lorenzo Cereser, and Chiara Zuiani. "Can multiparametric MRI replace Roach equations in staging prostate cancer before external beam radiation therapy?" European Journal of Radiology 85, no. 12 (2016): 2231–37. http://dx.doi.org/10.1016/j.ejrad.2016.10.023.

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15

Bishnoi, Pramila, Rakash Jangir, Ambika Singadiya, and Om Prakash. "Kinetics and Mechanism of Oxidation of Some Thioacids by Tripropylammonium Chlorochromate." Research Journal of Chemistry and Environment 26, no. 9 (2022): 84–89. http://dx.doi.org/10.25303/2609rjce084089.

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Oxidation of thioglycollic, thiolactic and thiomalic acids by 2-tripropylammonium chlorochromate (TPACC) in dimethylsulphoxide (DMSO) leads to the formation of disulphide dimmers. The reaction is first order in TPACC. Michaelies-Menten type of kinetics is observed with respect to the thioacids. Reaction failed to induce the polymerisation of acrylonitrile. The reaction is catalysed by hydrogen ions. The hydrogen ion dependence has taken the form kobs = a + b [H+]. The oxidation of thiolactic acid has been studied in nineteen different organic solvents. The solvent effect has been analysed by u

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16

Dilsha, K. M., and Seema Kothari. "Kinetics and Mechanism of the Oxidation of Some Thioacids by Butyltriphenylphosphonium Dichromate." Progress in Reaction Kinetics and Mechanism 32, no. 3 (2007): 119–29. http://dx.doi.org/10.3184/146867807x228236.

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The oxidation of thioglycollic, thiolactic and thiomalic acids by butyltriphenylphosphonium dichromate (BTPPD) in dimethylsulfoxide (DMSO) yielded the corresponding disulfide as the product. The reaction is first order with respect to BTPPD, however, second-order dependences of the rate were found on the concentrations of both the thioacid and hydrogen ions. The rate of oxidation of thiolactic acid (TLA) was determined in nineteen organic solvents. An analysis of the solvent effect by multiparametric equations indicated the cation-solvating power of the solvents to be most significant. A mecha

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17

Rodrigues, Aryane Araujo, Tirzah Moreira Siqueira, Tamara Leitzke Caldeira Beskow, Samuel Beskow, and Carlos Rogério de Mello. "Intensity-Duration-Frequency equations for Rio Grande do Sul - Brazil, based on stationary rainfall series." Ambiente e Agua - An Interdisciplinary Journal of Applied Science 18 (March 17, 2023): 1–17. http://dx.doi.org/10.4136/ambi-agua.2878.

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Heavy rainfall information is essential for environmental studies and water engineering. This study therefore aimed to adjust Intensity-Duration-Frequency (IDF) equations for 247 locations in the Rio Grande do Sul (RS) using stationary rainfall series. Mann-Kendall’s test was applied to identify the temporal trends in the Annual Maximum Daily Rainfall (AMDR) series of 271 rain gauges in RS. The Kappa, Generalized Extreme Value (GEV), Gumbel, two-parameters Log-Normal and three-parameters Log-Normal probabilistic distributions were adjusted to the AMDR series without significant temporal trend.

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18

Purohit, Priyanka, Pooja Tak, Yashasvi Inaniyan, and Pramila Naga. "KINETIC AND MECHANISTIC STUDIES IN THE OXIDATIVE REGENERATION OF CARBONYL COMPOUNDS FROM OXIMES BY PYRIDINIUM DICHROMATE." Journal of Advanced Scientific Research 13, no. 04 (2022): 45–50. http://dx.doi.org/10.55218/jasr.202213408.

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The oxidative deoximination of several aldo- and keto-oximes by pyridinium dichromate (PDC), in dimethylsulphoxide (DMSO), exhibited a first order dependence on PDC. A Michaelis-Menten type kinetics was observed with respect to oximes. The oxidation of ketoximes is slower than that of aldoximes. Aldoximes rates are correlated with Pavelich-Taft DSP model. Small sigma values (+) are the indication of a nucleophilic hit by an oxygen from chromate the carbon atom. The reaction is subject to alkyl group steric obstruction. One of the aldoximes (acetaldoxime) is subjected to the influence of 19 org

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19

Chekhonadskikh, Alexander. "Stability area of a synchronous generator nonlinear model with multiparametric excitation controller." Proceedings of the Russian higher school Academy of sciences, no. 4 (January 20, 2021): 51–61. http://dx.doi.org/10.17212/1727-2769-2020-4-51-61.

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We take as the research object the well-known system of nonlinear differential and functional equations that describes a synchronous generator. PIDD2-control was carried out through the excitation block. Effective values of the steady state in relative units and the preliminary settings of suboptimal controllers were obtained earlier using a linearized model. Disturbing surges (spikes and slump) in bus voltages were modeled as line impedance changes. The system stabilization was studied at various surges values and controller parameters by means series of numerical experiments; the calculation

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20

Malani, Neha, Manju Baghmar, Preeti Swami та Pradeep Kumar Sharma. "Kinetics and Mechanism of the Oxidation of Some α-Hydroxyacids by Morpholinium Chlorochromate". Progress in Reaction Kinetics and Mechanism 33, № 4 (2008): 393–405. http://dx.doi.org/10.3184/146867808x379300.

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The oxidation of glycollic, lactic, malic and a few substituted mandelic acids by morpholinium chlorochromate (MCC) in dimethylsulfoxide (DMSO) leads to the corresponding oxoacids. The reaction is first order each in MCC and hydroxyacid. The reaction failed to induce the polymerisation of acrylonitrile. The oxidation of α–deuteriomandelic acid shows a primary kinetic isotope effect ( kH/ kD = 5.63 at 298 K) but does not exhibit a solvent isotope effect. The reaction is catalysed by hydrogen ions according to: kobs = a + b[H+]. The oxidation of p-methyl mandelic acid has been studied in 19 diff

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Jangir, Rakesh, Ketul Kumawat, Pramila Bishnoi, and Om Prakash. "Structure-reactivity relation in the oxidation of some aliphatic aldehydes by Tripropylammonium chlorochromate." Research Journal of Chemistry and Environment 27, no. 3 (2023): 74–80. http://dx.doi.org/10.25303/2703rjce074080.

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The oxidation of six aliphatic aldehydes by tripropylammonium chlorochromate (TPACC) in dimethyl sulfoxide (DMSO) leads to the formation of corresponding carboxylic acids. The reaction is of first order each in TPACC. A Michaelis-Menten type of kinetics is observed with respect to the aldehydes. The reaction is catalysed by hydrogen ions. The hydrogen-ion dependence has the form: kobs = a + b[H+]. The oxidation of deuteriated acetaldehyde MeCDO exhibited a substantial primary kinetic isotope effect (kH/kD = 5.75 at 298 K). The oxidation of acetaldehyde has been studied in nineteen different or

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22

Ram, Ganpat, Varsha Bishnoi, and Om Prakash. "Correlation analysis of reactivity in oxidation of some aliphatic aldehydes by 2-picolinium chlorochromate: A kinetic study." Research Journal of Chemistry and Environment 25, no. 11 (2021): 64–70. http://dx.doi.org/10.25303/2511rjce6470.

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The oxidation of six aliphatic aldehydes by 2- picolinium chlorochromate (PICC) in dimethyl sulfoxide (DMSO) leads to the formation of corresponding carboxylic acids. The reaction is of first order each in PICC. A Michaelis-Menten type of kinetics is observed with respect to the aldehydes. The reaction is catalysed by hydrogen ions. The hydrogen-ion dependence has the form: kobs = a + b[H+]. The oxidation of deuteriated acetaldehyde MeCDO exhibited a substantial primary kinetic isotope effect (kH/kD = 5.69 at 298 K). The oxidation of acetaldehyde has been studied in nineteen different organic

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23

Kumawat, Ketul, Deeksha Yajurvedi, Anurag Choudhary, and Om Prakash. "Kinetic and mechanistic studies in the Oxidative regeneration of carbonyl compounds from oximes by diethylammonium chlorochromate." Research Journal of Chemistry and Environment 28, no. 9 (2024): 24–29. http://dx.doi.org/10.25303/289rjce024029.

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The oxidative deoximination of several aldo- and keto-oximes by diethylammonium chlorochromate (DEACC), in dimethylsulphoxide (DMSO) exhibited a first order dependence on DEACC. A Michaelis-Menten type kinetics was observed with respect to oximes. The oxidation of ketoximes is slower than that of aldoximes. The rates of oxidation of aldoximes correlated well in terms of Pavelich-Taft dual substituent-parameter equation. The low positive value of polar reaction constant indicated a nucleophilic attack by a chromate-oxygen on the carbon. The reaction is subject to steric hindrance by the alkyl g

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24

Kansara, Heena, Pooja Tak, Pramila Naga, Yashasvi Inaniyan, and Priyanka Purohit. "Oxidation Kinetics of some Unsaturated Acids by Tributylammonium Chlorochromate: A mechanistic Study." Research Journal of Chemistry and Environment 27, no. 7 (2023): 99–105. http://dx.doi.org/10.25303/2707rjce990105.

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The oxidation of maleic, fumaric, crotonic and cinnamic acids by tributylammonium chlorochromate (TBACC) in dimethylsulphoxide (DMSO) leads to the formation of corresponding epoxide. The reaction is of first order with respect to TBACC. A Michaelis-Menten type of kinetics are observed w.r.t. the acids. Due to non-aqueous nature of the solvents, toluene-p-sulphonic acid (TsOH) was used as the source of hydrogen ions. The reaction is catalysed by hydrogen ions. The hydrogen-ion dependence has the form: kobs = a + b [H+]. The oxidation of these acids was studied in nineteen different organic solv

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Preeti, Swami, Vadera K., Prasadrao PTSRK, and K. Sharma Pradeep. "Oxidation of some thioacids by tetraethylammonium chlorochromate : A kinetic and mechanistic study." Journal of Indian Chemical Society Vol. 86, Dec 2009 (2009): 1320–24. https://doi.org/10.5281/zenodo.5823959.

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Department of Chemistry, J.N.V. University, Jodhpur-342 005, Rajasthan, India <em>E-mail </em>: drpkvs27@yahoo.com Department of Chemistry, P.B. Siddharth College, Vijayawada, Andhra Pradesh, India <em>Manuscript received 5 June 2009, accepted 21 July 2009</em> The oxidation or thioglycollic, thiolactic and thiomalic acids by tetraethylammonium chlorochromate (TEACC) is first order both in (TEACC) and thioacids. The reaction is catalysed by hydrogen ions. The hydrogen ion dependence has taking the form : <em>K</em><sub>obs</sub> = a + b [H<sup>+</sup>]. The oxidation of thiolactic add has been

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Sonu, Sarswat, Sharma Vinita та K. Banerji Kalyan. "Kinetics and mechanism of the oxidation of some α-hydroxy acids by quinolinium bromochromate". Journal of Indian Chemical Society Vol. 79, Nov 2002 (2002): 871–75. https://doi.org/10.5281/zenodo.5847715.

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Department of Chemistry, J. N. V. University, Jodhpur-342 005, India <em>Manuscript received 22 April 2002. accepted 12 July 2002</em> The oxidation of glycollic, lactic, malic and a few substituted muddle acids by quinolinium bromochromate (QBC) in dimethylsulfoxide (DMSO) leads to the formation of the corresponding oxoacids. The reaction is first order each in QBC and the hydroxy acids. The reaction is catalyzed by the hydrogen ions. The hydrogen ion dependence has the form <em>k</em><sub>obs</sub> = <em>a + b</em> [H<sup>+</sup>]. Oxidation of mandelic acid has been studied in different org

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Sapronov, Ivan. "Volterra integral equation in Banach space." Modeling of systems and processes 16, no. 3 (2023): 105–14. http://dx.doi.org/10.12737/2219-0767-2023-16-3-105-114.

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Despite the significant results achieved in the study of operator equations (including Volterra equations) in normalized Banach spaces, fundamental research in this field of mathematics attracts the attention of a huge number of mathematicians around the world. The solutions of the Volterra equation describe many important processes in various fields of science and technology. Studies of various inverse problems, experimental or experimental data processing problems related to the study of spherical or axisymmetric plasma formations, numerous mathematical models of the existence of various bio

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Inaniyan, Yashasvi, Pooja Tak, Pramila Naga, and Priyanka Purohit. "Correlation analysis of reactivity in the oxidation of some vicinal and non-vicinal diols by Tributylammonium chlorochromate: A kinetic and mechanistic approach." Research Journal of Chemistry and Environment 26, no. 9 (2022): 26–32. http://dx.doi.org/10.25303/2609rjce026032.

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The kinetics of oxidation of four vicinal, four non-vicinal diols by tributylammonium chlorochromate (TBACC) has been studied in dimethylsulphoxide (DMSO). The main product of oxidation is the corresponding hydroxycarbonyl compound. The reaction is first order each in TBACC. Michaelies-Menten type of kinetics is observed with respect to the diols. The reaction is catalysed by hydrogen ions. The hydrogen ion dependence is taking the form: kobs = a + b[H+]. The oxidation of [1,1,2,2-2H4] ethanediol exhibits a substantial primary kinetic isotope effect (kH/kD = 5.81 at 298 K). The reaction has be

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Rupal, Kumbhat, and Sharma Vinita. "Kinetics and mechanism of the oxidation of some unsaturated acids by pyridinium chlorochromate." Journal of India Chemical Society Vol 81, Sep 2004 (2004): 745–49. https://doi.org/10.5281/zenodo.5832678.

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Department of Chemistry, J. N. V. University, Jodhpur 342 005. India <em>Manuscript received 6 January 2004, accepted 10 March 2004</em> The oxidation of maleic, fumaric, crotonic and cinnamic acids by pyridinium chlorochromate (PCC) in dimethylsulphoxide (DMSO) leads to the formation of corresponding epoxide. The reaction is of first order with respect to PCC and the acid. The reaction is catalysed by hydrogen ions. The hydrogen-ion dependence has the form : <em>k</em><sub>obs</sub> =a + b [H<sup>+</sup>]. The oxidation of these acids was studied in nineteen different organic solvents. T

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Poonam, Pohani, and K. Sharma Pradeep. "Kinetics and mechanism of the oxidation of DL-methionine by quinolinium fluorochromate." Journal of India Chemical Society Vol 81, Sep 2004 (2004): 757–61. https://doi.org/10.5281/zenodo.5832988.

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Department of Chemistry, J. N. V. University, Jodhpur-342 005, India <em>Manuscript received 22 September 2003, accepted 6 April 2004</em> The oxidation of methionine (Met) by quinolinium fluorochnnnate (QFC) in dimethylsulphoxide (DMSO) leads to the formation of corresponding sulphoxide. The reaction is of first order with respect to QFC. Michaelis-Menten type kinetics was observed with respect to methionine. The reaction is catalysed by hydrogen ions. The hydrogen-ion dependence has the form : <em>k</em><sub>obs</sub> = <em>α</em> + <em>b</em> [H<sup>+</sup>]. The oxidation o

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Shweta, Vyas, and K. Sharma Pradeep. "Kinetics and mechanism of the oxidation of some unsaturated acids by quinolinium bromochromate." Journal of Indian Chemical Society Vol. 80, Sep 2003 (2003): 820–23. https://doi.org/10.5281/zenodo.5837506.

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Department of Chemistry, J. N. V. University, Jodhpur-342 005, India <em>Manuscript received 20 August 2002. revised 11 February 2003, accepted 16 April 2003</em> The oxidation of maleic, fumaric, crotonic and cinnamic acids by quinolinium bromochromate (QBC) in dimethylsulphoxide (DMSO) leads to the formation of corresponding epoxide. The reaction is of first order with respect to QBC and the acid. The reaction is catalysed by hydrogen ions. The hydrogen-ion dependence has the form : k<sub>obs</sub> = a + b [H<sup>+</sup>]. The oxidation of these acids was studied in nineteen different organi

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Mendonça, Gonçalo, Frederico Afonso, and Fernando Lau. "Model order reduction in aerodynamics: Review and applications." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233, no. 15 (2019): 5816–36. http://dx.doi.org/10.1177/0954410019853472.

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The need of the aerospace industry, at national or European level, of faster yet reliable computational fluid dynamics models is the main drive for the application of model reduction techniques. This need is linked to the time cost of high-fidelity models, rendering them inefficient for applications like multi-disciplinary optimization. With the goal of testing and applying model reduction to computational fluid dynamics models applicable to lifting surfaces, a bibliographical research covering reduction of nonlinear, dynamic, or steady models was conducted. This established the prevalence of

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Purohit, Anjali, Manju Baghmar, and Vinita Sharma. "CORRELATION ANALYSES IN THE OXIDATION OF ALIPHATIC SECONDARY ALCOHOLS BY QUINOLINIUM DICHROMATE." Rasayan Journal of Chemistry, Special (2021): 156–64. http://dx.doi.org/10.31788/rjc.2021.1456552.

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Some of the aliphatic secondary alcohols when subjected to oxidation by Quinolinium dichromate (QDC) in dimethyl-sulfoxide (DMSO) as a medium, leading to form a product as analogous ketones. The reaction is found to be in the order of unity in QDC. A Michaelis-Menten type of kinetics, i.e. fractional-order kinetics is observed concerning the secondary alcohols. All the reactions have shown the effect of hydrogen ions. The oxidation of deuterated benzhydrol (PhCDOHPh) showed a considerable kinetic isotope effect (kH/kD = 5.65 at 298 K). The effect of solvents was studied on the oxidation of 2-p

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Pooja, Panchariya, Purohit T., Sharma D., Malani N., Kotai L., and K. Sharma Pradeep. "Kinetics and mechanism of the oxidation of DL-methionine by tetraethylammonium chlorochromate." Journal of Indian Chemical Society Vol. 89, Sep 2012 (2012): 1203–7. https://doi.org/10.5281/zenodo.5769196.

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Department of Chemistry, J. N. V. University, Jodhpur-342 005, Rajasthan, India <em>E-mail</em> : drpkvs27@yahoo.com lnstitute of Materials and Environmental Chemistry, RCNS, HAS, Budapest H-1025, Hungary <em>Manuscript received 02 November 2011, accepted 16 December 2011</em> The oxidation of DL-methionine (Met) by tetraethylammonium chlorochromate (TEACC) in dimethylsulphoxide (DMSO) leads to the formation of corresponding sulphoxide. The reaction is of first order with respect to both TEACC and Met. The reaction is catalysed by hydrogen ions. The hydrogen-ion dependence has the form : <em>k

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Deeksha, Yajurvedi, Kumbhani S., Shashtri I., Baghmar M., and K. Sharma Pradeep. "Kinetics and mechanism of the oxidation of DL-methionine by quinolinium bromochromate." Journal of Indian Chemical Society Vol. 85, Apr 2008 (2008): 459–61. https://doi.org/10.5281/zenodo.5815056.

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Department of Chemistry, J. N. V. University, Jodhpur-342 005, Rajasthan, India <em>E-mail :</em> drpkvs27@yahoo.com R. D. National College, Bandra West, Mumbai University, Mumbai-400 050, India <em>Manuscript received 26 June 2007, revised 3 January 2008, accepted /0 January 2008</em> The oxidation of methionine (Met) by quinolinium bromochromate (QBC) in dimethylsulphoxide (DMSO) leads to the formation of corresponding sulphoxide. The reaction is of first order with respect to each QBC and Met. The reaction is catalysed by hydrogen ions. The hydrogen-ion dependence has the form : <em>k</em><

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36

Ravdeep, Kaur, Tiwari Vandana, and Sharma Vinita. "Kinetics and mechanism of the oxidative regeneration of carbonyl compounds from oximes by benzyltriethylammonium chlorochromate." Journal of Indian Chemical Society Vol. 83, Nov 2006 (2006): 1171–74. https://doi.org/10.5281/zenodo.5833001.

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Department of Chemistry, J. N. V. University, Jodhpur-342 005, Rajasthan, India E-mail : drpkvs27@yahoo.com <em>Manuscript received 29 March 2006, accepted 23 August 2006</em> The oxidative de-oximination of several aldo- and keto-oximes by benzyltriethylammonium chlorochromate (BTEACC), in dimethylsulphoxide (DMSO), exhibited a first-order dependence on both the oxime and BTEACC. The oxidation or keto-oximes is slower than that of aldoximes. The rates of oxidation of aldoximes correlated well in terms of Pavelich-Taft dual substituent-parameter equation. The low positive value of polar reacti

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Itishri, Dave, Sharma Vinita, and K. Banerji Kalyan. "Kinetics and mechanism of the oxidative regeneration of carbonyl compounds from oximes by quinolinium fluorochromate." Journal of Indian Chemical Society Vol. 79, Apr 2002 (2002): 347–50. https://doi.org/10.5281/zenodo.5845712.

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Department of Chemistry, J. N. V. University, Jodhpur-342 005. India <em>Manuscript received 11 December 2000, revised 11 July 2001. accepted 4 September 2001</em> The oxidative deoximination of several also· and keto-oximes by quinolinium fuorochromate (QFC) in dimethylsulfoxide, exhibited a first order dependence on both the oxime and QFC. The oxidation of ketoximes is slower than that of aldoximes. The rates of oxidation of aldoximes correlated well in terms of pavelich-Taft dual substituent-parameter equation. The low positive value of polar reaction constant indicated a nuclcophili

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Chen, Yanjin, Jiawen Li, Jianliang Zhuo, Feng Han, and Qing Huo Liu. "Fast Multiparametric Electromagnetic Full-Wave Inversion via Solving Contracting Scattering Data Equations Optimized by the 3-D MRF Model." IEEE Transactions on Microwave Theory and Techniques 68, no. 11 (2020): 4515–27. http://dx.doi.org/10.1109/tmtt.2020.3015518.

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Khoromskij, B. N., and I. Oseledets. "Quantics-TT Collocation Approximation of Parameter-Dependent and Stochastic Elliptic PDEs." Computational Methods in Applied Mathematics 10, no. 4 (2010): 376–94. http://dx.doi.org/10.2478/cmam-2010-0023.

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Abstract We investigate the convergence rate of the quantics-TT (QTT) stochas- tic collocation tensor approximations to solutions of multiparametric elliptic PDEs and construct efficient iterative methods for solving arising high-dimensional parameter- dependent algebraic systems of equations. Such PDEs arise, for example, in the para- metric, deterministic reformulation of elliptic PDEs with random field inputs, based, for example, on the M-term truncated Karhunen-Loève expansion. We consider both the case of additive and log-additive dependence on the multivariate parameter. The local-global

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Kudryavtsev, Evgeny Mikhailovich, Alexandr Valerievich Gavrilenko, and Mostafa Jafari. "Digital simulation of load-bearing structures with movable cargo carts." E3S Web of Conferences 535 (2024): 04001. http://dx.doi.org/10.1051/e3sconf/202453504001.

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The process of digital simulation of the design parameters of load-bearing structures when moving a cargo cart on them is developed on the example of a load-bearing beam of a crane (bridge. gantry, ...). This process includes three main stages. The first stage is the creation of appropriate mathematical multiparametric equations for automated simulation of: the values of reactions in the supports of the crane load-bearing beam; bending moments; transverse forces; displacements; beam deflection angles and maximum stresses at different positions of the cargo cart on the crane beam. The second st

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A., Choudhary, Yajurvedi D., Kumbhani S., Shastri I., and Sharma Vinita. "Oxidation of some unsaturated acids by tetrakis (pyridine) silver dichromate : A kinetic and mechanistic study." Journal of Indian Chemical Society Vol. 86, Aug 2009 (2009): 832–36. https://doi.org/10.5281/zenodo.5814992.

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Department of Chemistry, 1. N. V. University. Jodhpur-342 005. Rajasthan, India <em>E-mail</em> : drpkvs27@yahoo.com RD National College, Bandra West, Mumbai University, Mumbai-400 050. India <em>Manuscript received 28 January 2008, revised 24 March 2009, accepted 1 April 2009</em> The oxidation of a few unsaturated acids viz. maleic, fumaric, crotonic and cinnamic acids by tetrakis (pyridine) silver dichromate (TPSD) in dimethylsulphoxide (DMSO) leads to the formation of corresponding epoxide. The reaction is or first order with respect to TPSD and the acid. The reaction is catalysed by hydro

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Geeta, Bishnoi, S. Sindal R., Mishra Pallavi, and K. Sharma Pradeep. "Kinetics and mechanism of the oxidative regeneration of carbonyl compounds from oximes by quinolinium bromochromate." Journal of Indian Chemical Society Vol. 84, May 2007 (2007): 458–61. https://doi.org/10.5281/zenodo.5819677.

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Department of Chemistry, J. N. V. University, Jodhpur-342 005, Rajasthan, India <em>E-mail</em> : drpkvs27@yahoo.com <em>Manuscript received 26 September 2006, revised 6 March 2007, accepted 14 March 2007</em> The oxidative deoximination of several aldo- and keto-oximes by quinolinium bromochromate (QBC), in dimethylsulphoxide (DMSO), exhibited a first order dependence on both the oxime and QBC. The oxidation of ketoximes is slower than that of aldoximes. The rates of oxidation of aldoximes correlated well in terms of Pavelich-Taft dual substituent-parameter equation. The low positive value of

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Минаков, E. Minakov, Федоров, et al. "Mathematical modeling of processes in biotechnical complex «corrective action facilities – humax respiratory system»." Journal of New Medical Technologies. eJournal 9, no. 4 (2015): 0. http://dx.doi.org/10.12737/16378.

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The article considers the aim of modeling humax respiratory system structure for predicting the change of physiological parameters at different methods of physical influence such as operated reduction in breathing circuit. The developed complex of mathematical models includes: equations of mass rate and masstransfer rate in lung channels at arborization of auriferous ways according to the rule of right dichotomy; equations of breathing muscles dynamics, based on moving of cylinder wall in radial and axial directions; special functions, providing automatic muscles

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Umirzakov, Serikbay, Zhumakhan Mustafayev, Laura Tokhetova, Zhanuzak Baimanov, Kairat Akylbayev, and Lazzat Koldasova. "Modeling the Process of Crop Yield Management in Hydroagro-Landscape Saline Soils." Sustainability 17, no. 9 (2025): 4214. https://doi.org/10.3390/su17094214.

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To study the impact of soil salinity type and degree in irrigated lands on the process of crop yield formation, multiparametric and single-parameter mathematical models were used. The methodological basis of the study was the materialist theory of scientific knowledge (analysis and synthesis) and the laws of ecology, using graph-analytical methods based on artificial intelligence and the applied software product Microsoft Office. To create the database, an empirical method of generalizing research results was used to study the effect of soil salinity type and degree in irrigated lands on the y

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Coimbra, Tiago A., Jorge H. Faccipieri, João H. Speglich, Leiv-J. Gelius, and Martin Tygel. "Enhancement of diffractions in prestack domain by means of a finite-offset double-square-root traveltime." GEOPHYSICS 84, no. 1 (2019): V81—V96. http://dx.doi.org/10.1190/geo2018-0160.1.

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Exploration of redundancy contained in the seismic data set assures enhancement of images that are based on stacking results. This enhancement is the goal of developing multiparametric traveltime equations that are able to approximate reflection and diffraction events in general source-receiver configurations. The main challenge of using these equations is to estimate a large number of parameters in a computationally feasible, reliable, and fast way. To obtain a better fit for diffraction traveltime events than the ones in the literature, we have derived a finite-offset (FO) double-square-root

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Arora, Bhawana, Jitendra Ojha, and Pallavi Mishra. "Kinetics and Mechanism of Oxidation of Aliphatic Secondary Alcohols by Benzimidazolium Fluorochromate in Dimethyl Sulphoxide Solvent." Oriental Journal Of Chemistry 37, no. 3 (2021): 626–33. http://dx.doi.org/10.13005/ojc/370315.

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Oxidation of secondary alcohols is an important part of synthetic organic chemistry. Various studies are carried out at different reaction conditions to determine the best mechanistic pathways. In our study, oxidation of different secondary alcohols was done by using Benzimidazolium Fluorochromate in Dimethyl Sulphoxide, which is a non-aqueous solvent. Oxidation resulted in the formation of ketonic compounds. The reaction showed first order kinetics both in BIFC and in the alcohols. Hydrogen ions were used to catalyze the reaction. We selected four different temperatures to carry out our study

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M., Gehlot, Gilla M., Mishra P., and Sharma Vinita. "Kinetics and mechanism of the oxidation of aliphatic primary alcohols by imidazolium fluorochromate." Journal of Indian Chemical Society Vol. 88, May 2011 (2011): 685–92. https://doi.org/10.5281/zenodo.5769067.

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Chemical Kinetics Laboratory, Department of Chemistry, J. N. V. University, Jodhpur-342 005, Rajasthan, India <em>E-mail </em>: drpkvs27@yahoo.com <em>Manuscript received 06 April 2010, revised 15 September 2010, accepted 16 September 2010</em> The oxidation of nine aliphatic primary alcohols by imidazolium fluorochromate (IFC) in dimethylsulphoxide leads to the formation of corresponding aldehydes. The reaction is first order with respect to IFC. A Michaelis-Menten type kinetics is observed with respect to alcohols. The reaction is promoted by hydrogen ions; the hydrogen-ion dependence has th

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48

Kavita, Chouhan, Prasad Rao PTSRK, and K. Sharma Pradeep. "The kinetics and mechanism of oxidation of aliphatic aldehydes by benzyltriethylammonium chlorochromate." Journal of Indian Chemical Society Vol. 83, Feb 2006 (2006): 191–94. https://doi.org/10.5281/zenodo.5816843.

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Department of Chemistry, Adarsh College, Jodhpur, Rajasthan, India Department of Chemistry, PBS College, Vijaywada, Andhra Pradesh, India Department of Chemistry, J. N. V. University, Jodhpur-342,005, Rajasthan, India <em>Manuscript received 5 October 2004. revised 17 November 2005, accepted 21 November 2005</em> The oxidation of six aliphatic aldehydes by benzyltriethylanunonium chlorochromate (BTEACC) in dimethyl sulfoxide (DMSO) leads to the formation of corresponding carboxylic acids. The reaction is lirst order each in BTEACC and the aldehyde. The reaction is catalysed by hydrogen ions. T

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M., K. Mishra, Sharma Monica, and Sharma Vinita. "Kinetics and mechanism of the oxidation of aliphatic primary alcohols by benzyltriethylammonium chlorochromate." Journal of Indian Chemical Society Vol. 83, Apr 2006 (2006): 364–68. https://doi.org/10.5281/zenodo.5836279.

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DRDO, Defence Laboratories, Jodhpur, Rajasthan, India Modi Institute of Engineering, Kota, Rajasthan, India Department of Chemistry, J. N. V. University, Jodhpur-342 005, Rajasthan, India <em>Manuscript received 6 April 2005. revised 19 August 2005, accepted 16 December 2005</em> The oxidation of nine aliphatic primary alcohols by benzyltriethylammonium chlorochromate (BTEACC) in dimethylsu sulfoxide(DMSO) leads to the formation of corresponding aldehydes.The reaction is first order with respect to both BTEACC and the alcohol. The reaction is catalysed by hydrogen ions. The hydrogen-ion depend

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Dubovik, V. N., V. T. Zhukov, K. V. Manukovskii, N. D. Novikova, D. V. Tulin, and O. B. Feodoritova. "Parametric Calculations of the Aerodynamics of a Descent Vehicle." Herald of the Bauman Moscow State Technical University. Series Natural Sciences, no. 2 (95) (April 2021): 37–51. http://dx.doi.org/10.18698/1812-3368-2021-2-37-51.

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We present the methodology and results of parametric aerodynamic studies of vehicles descending into the planet’s atmosphere. The proposed computational approach might serve as the basis for solving a number of problems such as predicting and optimizing the descent trajectory of the vehicle, the search for a rational aerodynamic layout of the vehicle, i.e., tasks requiring massive parametric calculations. The systematization of such calculations is the first step towards the creation of a specialized database that includes sets of input and output data (flight speed, angles of attack, drag and

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