Suzhou University of Science and Technology

Taizhou Danding Biotechnology Co., Ltd.

Kunshan Public Security Bureau

Cheng Zeng

Jie Zhang

Cheng Cheng

Yang Chen

Baochuan Fu

Qian Zhang

Yuehong Tao

Lili Xu

Zhiming Cui

Zhengbing Gu

Xuefeng Xi

A method for retrieving footprint images is provided, comprising: pre-training models; cleaning footprint data and conducting expansion pre-processing by using the pre-trained models, dividing the footprint data into multiple data sets; adjusting full connection layers and classification layers of the models; training the models again by using the data sets through the parameters of the pre-trained models; saving the models trained twice, removing the classification layer, executing a feature extraction for images in an image library and a retrieval library to form a feature index library; connecting the features extracted by three models to form fused features, establishing a fused feature vector index library; extracting the features of the images in the image library to be retrieved in advance, and establishing a feature vector library; calculating distances in the retrieval library and the image library when a single footprint image is inputted, thereby outputting the image with the highest similarity.

Method for retrieving footprint images

A method for extracting herbacetin from plants ofL., comprising the following steps: 1) performing an extracting process for the pulverized medicalL. with an extracting solvent, and condensing to obtain an extract; 2) performing a leaching process for the extract and performing an acid hydrolysis for the extracted aqueous layer; 3) performing a leaching process for the solution after the acid hydrolysis with an organic solvent, combining the organic layer and concentrating under reduced pressure to obtain a herbacetin extract; 4) treating the herbacetin extract through polyamide column chromatography, collecting the outflow containing herbacetin and drying through condensation to obtain a crude herbacetin product; 5) treating the crude herbacetin product through reverse-phase silica-gel column chromatography, collecting the outflow containing herbacetin, drying through condensation and recrystallizing to obtain a pure herbacetin product. The invention for herbacetin preparation is characterized by simple process, high yield.

Method for extracting herbacetin from plants ofL

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Jiangsu, China

Cheng Zeng