Optimization of Film Coating Antistaling Agent Formula of Cut Tree Peony Flowers Based on Response Surface Methodology Optimization of Film Coating Antistaling Agent Formula of Cut Tree Peony Flowers Based on Response Surface Methodology Preparation of puerarin self-microemulsifying osmotic pump controlled-release capsule Antidiarrheal effects of different processed products of Plantaginis Semen and optimization of processing technology by CCD-RSM Optimization of inclusion process of mixed volatile oil of forsythia oil and peppermint oil by colloid mill method