Papers by Kouadri Abdelmalek
非線形プロセス監視のための機械学習ベース縮小カーネルPCA【JST・京大機械翻訳】
IEEE Conference Proceedings, 2019
信頼できるプロセス監視のためのPCAと適応閾値に基づく改良されたプラント全体の故障検出方式:Tennessee Eastmanプロセスの新しい改訂モデルへの応用【JST・京大機械翻訳】
Journal of Chemometrics, 2018
Algerian Journal of Signals and Systems
In this paper, we suggest to use a two-dimensional plot characterizing the statistical variabilit... more In this paper, we suggest to use a two-dimensional plot characterizing the statistical variability of a large-sized multivariate data. This graphical representation is based on the mean and variance values. The two statistical parameters plot is used to assess fault detection performances in a cement rotary kiln system. The adaptive threshold technique is shown to result in more accurate and reliable detection. The threshold is established through several repeated experiments under the healthy mode with the same operating conditions. An adequate statistical test is used to examine the validity of the adaptive threshold estimation approach. At each mean’s subinterval for all experiments, a confidence interval closely linked to the distribution frequencies of the variance as a random variable is obtained. In addition, several significance levels are considered to show the performances of the proposed adaptive thresholding technique compared to the limitations of the fixed threshold th...
THIRD INTERNATIONAL CONFERENCE OF MATHEMATICAL SCIENCES (ICMS 2019), 2019
In this paper, a numerical approximation for the solution of linear fractional differential equat... more In this paper, a numerical approximation for the solution of linear fractional differential equations, based on Galerkin method and Bernstein polynomials, is proposed. A system of linear equations is obtained and the coefficients of Bernstein polynomials, whose linear combination is used to approximate the solution, are determined. Matrix formulation is used throughout the whole procedure. The accuracy of the proposed technique has been evaluated via different degrees of Bernstein polynomials.
IET Generation, Transmission & Distribution, 2019
Accurate transmission line parameters values are of high importance in setting protection relays ... more Accurate transmission line parameters values are of high importance in setting protection relays and rigorous locating faults that may occur along the transmission network. For this purpose, the work reported in this study presents a new technique for the delicate determination of transmission lines parameters that are uniformly distributed along the line length. The developed technique is able to approximate the steady-state profiles for the transmission line voltage and current as a function of time and line length by given sets of polynomials that, in turn, are substituted in model equations. Synchronised time-domain data, recorded from both line terminals, are utilised as boundary conditions for the distributed-parameter transmission line model. The well-known Galerkin method is adopted to transform the line model into a system of non-linear algebraic equations to be solved. This system of algebraic equations is converted to residuals that are consequently regrouped in a cost function to be optimised. Thereby, the series resistance, series inductance and the shunt capacitance per line length are the parameters minimising the cost function. Both simulations and calculation are performed with MATLAB software. The obtained results show the effectiveness and accuracy of the new approach.
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Papers by Kouadri Abdelmalek