A new model is established to analyze mining stope stability, using variable weight theory calculate the index for each factor in different stopes and unascertained measure evaluation technique predict risk grade of stability. In this model, an system by virtue 7 most important factors established, including rock saturated uniaxial compressive strength, quality designation, joint fissure, span,...

The consideration of discrete variables (e.g. catalyst, ligand, solvent) in experimental self-optimization approaches remains a significant challenge. Herein we report the application new mixed variable multi-objective optimization (MVMOO) algorithm for chemical reactions. Coupling MVMOO with an automated continuous flow platform enabled identification trade-off curves different performance cri...

Gold was determined in copper concentrate by an instrumental neutron activation analysis technique using the relative method. The determination was repeated by radiochemical and chemical neutron activation analysis with the aid of an anion exchange strategy for the chemical separation of gold from the matrix (Fe, Cu, and Zn). Irradiation of copper concentrate samples was carried out in APSARA r...