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policy. the purpose of this paper is to present a new analytical approach for evaluating reorder points in inventory management policies. this approach considers the reorder point as a function of forecasted demands in the planning horizon, which can vary through time. lead-times and forecast errors are the uncertainties present in the model. the composed distribution of these parameters is used to obtain an analytical expression for the proposed forecast based reorder point. simulation experiments are performed in order to validate and test the accuracy of the proposed model. the experiments consider different lead-time and demand distributions and also different magnitude of forecast errors. beyond the accuracy of the analytical model the simulations seeks to evaluate the premises adopted, mainly the one of normally distributed lead-time demand.
The effects of acetate, citrate, benzoate, tetra-ethylammonium iodide (TEA) and
1,4,8,11 tetra-azacyclo-tetradecane (cyclam) on the corrosion behavior of
aluminum in 1 M HClO4 at 40°C were studied by potentiodynamic
polarization technique. Acetate, citrate, and benzoate inhibited the corrosion
of aluminum and shifted the breakdown potential to positive direction. Cyclam
was investigated as a macrocyclic organic inhibitor to the acid corrosion
of aluminum. The addition of cyclam to the corroding medium showed a pronounced
effect on the anodic but not on the cathodic part of the polarization curve.
The addition of TEA to the medium enhanced the corrosion rate and shifted the
breakdown potential to more negative value as the concentration increased. The
results were discussed on the basis of the adsorption mechanism and the nature
of the adsorbed species.