Elhadj Kolli

RESEARCH, TEACHING, or OTHER INTERESTS

Organic Chemistry, Spectroscopy, Biochemistry, General Biochemistry, Genetics and Molecular Biology

Scopus Publications

Approximation algorithms for capacitated stochastic inventory control models
Retsef Levi, Robin O. Roundy, David B. Shmoys, and Van Anh Truong
Institute for Operations Research and the Management Sciences (INFORMS)
We develop the first algorithmic approach to compute provably good ordering policies for a multiperiod, capacitated, stochastic inventory system facing stochastic nonstationary and correlated demands that evolve over time. Our approach is computationally efficient and guaranteed to produce a policy with total expected cost no more than twice that of an optimal policy. As part of our computational approach, we propose a novel scheme to account for backlogging costs in a capacitated, multiperiod environment. Our cost-accounting scheme, called the forced marginal backlogging cost-accounting scheme, is significantly different from the period-by-period accounting approach to backlogging costs used in dynamic programming; it captures the long-term impact of a decision on system performance in the presence of capacity constraints. In the likely event that the per-unit order costs are large compared to the holding and backlogging costs, a transformation of cost parameters yields a significantly improved guarantee. We also introduce new semimyopic policies based on our new cost-accounting scheme to derive bounds on the optimal base-stock levels. We show that these bounds can be used to effectively improve any policy. Finally, empirical evidence is presented that indicates that the typical performance of this approach is significantly stronger than these worst-case guarantees.

RECENT SCHOLAR PUBLICATIONS

Evaluation of the antimicrobial activity of root extracts of selected plants growing spontaneously in southern Algeria
E Kolli, S Zeroual, A Demirpolat, H Haba
African Journal of Biological Sciences 6 (5), 8694-8714 2024



Raction de Claisen-Schmidt: Synthse nouvelles molcules drivs de1, 4-dihydropyridines quinoliques
A Kedjadjaa, Y Miloudi, E Kolli, R Merdes
RHAZES: Green and Applied Chemistry 15, 17-20 2022



SYNTHESIS AND CHARACTERIZATI OF NEW N-{2-(1H-INDOL-3-YL) ETHYL}-1-(QUINOLINYL) METHANAMIDE DERIVATIVES
A Kedjadja, E Kolli, R Merdes
Moroccan Journal of Heterocyclic Chemistry 21 (04), Mar. Chim. Heterocycl 2022



Synthse et ractivit d’htrocycles azots de type pyrazoline quinolinique intret biologique
AA KEDJADJA
RHAZES: Green and Applied Chemistry 11, 16-26 2021



Vol 5, N 1 (THEME I: Synthse et Ractivit des Htrocycles)
N BESBES
RHAZES: Green and Applied Chemistry 5 2019



1,1′-{1,4-Phenylene bis[3-(6-chloro-2-methyl-4-phenylquinolin-3-yl)-4,5-dihydro-1H-pyrazole-5,1-diyl]}dibutan-1-one
A Kedjadja, E Kolli, A Bouraiou, R Merdes, N Haddour
Molbank 2015 (4), M868 2015



1-[3-(2-Methyl-4-phenylquinolin-3-yl)-5-phenyl-4,5-dihydro-1H-pyrazol-1-yl]-propane-1-one
A Kedjadja, E Kolli, A Bouraiou, R Merdes
Molbank 2015 (2), M863 2015



Cytotoxic sesquiterpene lactones and other constituents of Centaurea omphalotricha
EH Kolli, F Len, F Benayache, S Estvez, J Quintana, F Estvez, ...
Journal of the Brazilian Chemical Society 23, 977-983 2012

MOST CITED SCHOLAR PUBLICATIONS

Cytotoxic sesquiterpene lactones and other constituents of Centaurea omphalotricha
EH Kolli, F Len, F Benayache, S Estvez, J Quintana, F Estvez, ...
Journal of the Brazilian Chemical Society 23, 977-983 2012
Citations: 57



1-[3-(2-Methyl-4-phenylquinolin-3-yl)-5-phenyl-4,5-dihydro-1H-pyrazol-1-yl]-propane-1-one
A Kedjadja, E Kolli, A Bouraiou, R Merdes
Molbank 2015 (2), M863 2015
Citations: 2



1,1′-{1,4-Phenylene bis[3-(6-chloro-2-methyl-4-phenylquinolin-3-yl)-4,5-dihydro-1H-pyrazole-5,1-diyl]}dibutan-1-one
A Kedjadja, E Kolli, A Bouraiou, R Merdes, N Haddour
Molbank 2015 (4), M868 2015
Citations: 1