Phosphorous (P) and iron (Fe),two essential nutrients for plant growth and development,are highly abundant elements in t......

<正> 设(H,△,;μ)是一偏序Hilbert分解空间(见[1],简记为PHRS),则可引出一组正交射影簇(X(α),其中 C={b:b不小于a,b不大于等于设......