Table 1 The two-level BP neural network used to identify Maca origins.
From: Origin identification of Chinese Maca using electronic nose coupled with GC-MS
Province | City (Level 1) | Town (Level 2) | No. of sample |
|---|---|---|---|
Yunnan | Chuxiong | Donghua | 5 |
Dali | Eryuan | 5 | |
Heqing | 25 | ||
Jianchuan | 3 | ||
Kunming | Dongchuan | 1 | |
Luquan | 8 | ||
Lijiang | Yulong | 81 | |
Ninglang | 36 | ||
Yongsheng | 2 | ||
Shangri-La | Weixi | 24 | |
Hutiaoxia | 18 | ||
Jiantang | 14 | ||
Xiaozhongdian | 36 | ||
Sichuan | Huidong | Baishan | 4 |
Manyingou | 17 | ||
Duge | 2 | ||
Wudongde | 1 | ||
Qianxin | 9 | ||
Lama | 12 | ||
Total | 6 | 19 | 303 |
