For the evaluation of structures with known ductility demands,the constant-ductility displacement ratio spectra(CDDRS) are particularly useful for providing ine
This paper studied the structure and dynamic change of microbial communities in bio-reactor for treating ground water which contained high concentration of iron
The effect of drying techniques on the microstructure,morphology and pore structure of porous silica gels was studied in the paper.The gels were prepared by usi