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您好作者，我在用TransFG跑IP102数据集的时候，在训练阶段loss一直保持在4点多不变，Valid Accuracy只有百分之0.4，经过多轮训练一直不变化，请问您有遇到过这类的问题么？

Hi，thanks a lot for publishing the code. I had a question: I use your code to train CUB_200_2011datasets, but loss does not decrease while training

我的微信号NatBiotechnol

使用vggnet，有多块GPU怎么指定具体某一块？

你好，请问你们是否尝试过在斯坦福汽车数据集上测试代码，我用源码跑下来效果一直很差，比论文中的效果低3%左右

转了之后不知道怎么配置datasets下自定义的.yaml文件，
names:
0: Drosicha_contrahens_female
1: Drosicha_contrahens_male
2: Chalcophora_japonica
3: Anoplophora_chinensis
4: Psacothea_hilaris(Pascoe)
5: Apriona_germari(Hope)
6: Monochamus_alternatus
7: Plagiodera_versicolora(Laicharting)
8: Latoia_consocia_Walker
9: Hyphantria_cunea
10: Cnidocampa_flavescens(Walker)
11: Cnidocampa_flavescens(Walker_pupa)
......
不知道怎么能抽取出来，然后运行会报错
Traceback (most recent call last):
File "train.py", line 8, in
model.train(data="./ultralytics/cfg/datasets/pest.yaml", epochs=3) # train the model
File "/root/autodl-tmp/ultralytics-main/ultralytics/engine/model.py", line 336, in train
self.trainer = (trainer or self._smart_load('trainer'))(overrides=args, _callbacks=self.callbacks)
File "/root/autodl-tmp/ultralytics-main/ultralytics/engine/trainer.py", line 123, in init
raise RuntimeError(emojis(f"Dataset '{clean_url(self.args.data)}' error ❌ {e}")) from e
RuntimeError: Dataset 'ultralytics/cfg/datasets/pest.yaml' error ❌ object of type 'NoneType' has no len()