[1] Lanzhou Univ, State Key Lab Appl Organ Chem, Coll Chem & Chem Engn, Lanzhou 730000, Peoples R China
[2] Lanzhou Univ, Key Lab Nonferrous Met Chem & Resources Utilizat, Coll Chem & Chem Engn, Lanzhou 730000, Peoples R China
[3] Akita Prefectural Univ, Fac Syst Engn, Dept Machine Intelligence & Syst Engn, Akita 0150055, Japan