其二是真实焊点影像的特征萃取与分类，论文中所提出之特征组是由影像区域分割与影像区域平均亮度两类所组合而成。
The second stage is the feature extraction from real solder images under the designed illumination, and the feature set proposed includes the partitioned regions and weighted areas.
并采用索氏提取技术和正辛醇-水萃取技术对砷、锑形态在中药中的分布特征进行了分析研究。
Soxhlet extraction system and an-octanol-water extraction system were employed for speciation analysis and research of As and se in Chinese herbs.
萃取上述藻类的色素，进行荧光特征提取，以期在纲或更细层次识别典型浮游植物。
Extracted the fluorescence spectra characteristics of phytoplankton pigments mentioned above, in order to identify typical phytoplankton in class or further detail levels.
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