In this paper the analysis of pre-compensation, calculation method and procedure of program modification are presented.
文章对预先补偿法作了原理上的分析，介绍了补偿、计算和修改尺寸的方法与步骤。
2
The molecular structure of the silicone resin pre-and post-blending modification by poly (butyl methacrylate)(PBMA) was characterized by Fourier transform infra-red spectrometry.
采用傅里叶变换红外光谱表征了聚甲基丙烯酸丁酯（PBMA）共混改性有机硅树脂前后的结构特征；
3
MRI was used for pre surgical localization, designing and modification of radiation dosage.