In this paper,FXL-14 (tetradecyl iminobimetyl phosphonic acid) as a collector for floating wolframite without Pb^(2+) and its adsorption mechanism were studied by electrochemical method.Flotation experiment results sh...In this paper,FXL-14 (tetradecyl iminobimetyl phosphonic acid) as a collector for floating wolframite without Pb^(2+) and its adsorption mechanism were studied by electrochemical method.Flotation experiment results showed that in the wide range of pH value activation of FXL-14 collecting wolframite with Pb^(2+) was not needed.Wolframite—carbon paste electrode and small-amplitude triangular potential sweep were used to measure the electro-double-layer capacitance of wolframite in the FXL-14 solution (with and without of the presence of 1×10^(-4)MPb^(2+)).It is showed that in spite of concentration of Pb^(2+) in the flotation processing,with FXL-14 (800mg/l) the electro-double-layer capacitance was bigger than with FXL-14 (800mg/l) and Pb^(2+).展开更多
With the promotion by both mathematics itself and the practical requirements from modern society,the interest of studies on inverse problems and ill-posed problems,at home and abroad,has been flourishing in recent dec...With the promotion by both mathematics itself and the practical requirements from modern society,the interest of studies on inverse problems and ill-posed problems,at home and abroad,has been flourishing in recent decades.The intrinsic mathematical reasons for the studies on inverse problems come from the fact that most of the inverse problems are ill-posed,i.e.,the existence,uniqueness and stability of the solution cannot be ensured due to the configurations of the problems themselves.The characteristic of the ill-posedness for inverse problems makes it hard to construct the(generalized)solutions,especially to keep the solutions stable with respect to the noisy input data.To overcome these difficulties,some regularizing techniques should be introduced,which are closely related to many mathematical branches such as partial differential equations(PDEs),functional analysis,optimizations and numerical analysis.展开更多
文摘In this paper,FXL-14 (tetradecyl iminobimetyl phosphonic acid) as a collector for floating wolframite without Pb^(2+) and its adsorption mechanism were studied by electrochemical method.Flotation experiment results showed that in the wide range of pH value activation of FXL-14 collecting wolframite with Pb^(2+) was not needed.Wolframite—carbon paste electrode and small-amplitude triangular potential sweep were used to measure the electro-double-layer capacitance of wolframite in the FXL-14 solution (with and without of the presence of 1×10^(-4)MPb^(2+)).It is showed that in spite of concentration of Pb^(2+) in the flotation processing,with FXL-14 (800mg/l) the electro-double-layer capacitance was bigger than with FXL-14 (800mg/l) and Pb^(2+).
文摘With the promotion by both mathematics itself and the practical requirements from modern society,the interest of studies on inverse problems and ill-posed problems,at home and abroad,has been flourishing in recent decades.The intrinsic mathematical reasons for the studies on inverse problems come from the fact that most of the inverse problems are ill-posed,i.e.,the existence,uniqueness and stability of the solution cannot be ensured due to the configurations of the problems themselves.The characteristic of the ill-posedness for inverse problems makes it hard to construct the(generalized)solutions,especially to keep the solutions stable with respect to the noisy input data.To overcome these difficulties,some regularizing techniques should be introduced,which are closely related to many mathematical branches such as partial differential equations(PDEs),functional analysis,optimizations and numerical analysis.
