In this research work, the leaching behavior of a copper oxide ore sample prepared from Qaleh-Zari mine with very high grade 5.4% Cu (malachite and azurite) was investigated to evaluate effects significant operating parameters on recovery, including sulfuric acid concentration, solid percentage, particle size agitation speed. Then, response surface methodology (RSM) central composite design (CC...

The growing size of Software Engineering teams (up to a thousand people), combined with shrinking software life cycle duration (a few months) have created considerable pressure to increase concurrency. Concurrent work in Software Engineering. leads to find the same “object” simultaneously in multiple copies, locations and formats. Concurrent engineering support means the definition, control and...

The leaching kinetics of smithsonite ore in acetic acid solutions, an environmental friend, and natural reagent was investigated. The influence of parameters such as reaction temperature, particle size, solid-liquid ratio and acid concentration was studied in order to reveal the leaching kinetics of smithsonite ore. In this study, experimental and statistical methods were carried out in order t...

Supply chain management (SCM) has developed more than 30 years. However, few studies explore intellectual structure of SCM. The purpose of this study is to examine the intellectual structure of SCM through co-citation method. Data was collected from Web of Science online database. A total of 4,033 articles and 117,984 references were identified. Authors’ productivity and 41 highly cited/value a...

Unsatisfiable core analysis can boost the computation of optimum stable models for logic programs with weak constraints. However, current solvers employing unsatisfiable core analysis either run to completion, or provide no suboptimal stable models but the one resulting from the preliminary disjoint cores analysis. This drawback is circumvented here by introducing a progression based shrinking ...

slope stability analysis is an enduring research topic in the engineering and academic sectors. accurate prediction of the factor of safety (fos) of slopes, their stability, and their performance is not an easy task. in this work, the adaptive neuro-fuzzy inference system (anfis) was utilized to build an estimation model for the prediction of fos. three anfis models were implemented including g...

This communication reports the reduction mechanism and kinetics of CoO-NiO/Al2O3 oxygen carrier using methane as the reduction gas. Kinetics experiments are performed in a novel fluidized bed CREC riser simulator under turbulent fluidized bed reaction conditions. A shrinking-core model is used for the kinetic modeling assuming spherical grains of the oxygen carrier particles. The XRD analysis s...

SCM (supply chain management) emphasizes on the strategic cooperative relationship between core enterprise and enterprise alliance. The selection of strategic partners is an important decision-making problem in SCM and is the key to successful SCM. In this paper, aiming for the supplier selection problem, the author discusses a class of AHP (analytical hierarchy process) technique—simulation ap...