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标题(学术版):均方根误差 (RMSE)与平均绝对误差 (MAE)在损失函数中的应用与比较 标题(生动版):RMSE与MAE:两种评价预测误差的尺子,哪个更适合你? 摘要: 在机器学习和数据分析中,损失函数是衡量模型预测准确性的关键。均方根误差 (RMSE)和平均绝对误差 (MAE)是两种常用的损失函数。本文. 前言 作为一个成功拿到了UCLA MAE项目offer的过来人,可以根据自己的申请经历,跟题主分享一些关于MAE项目的相关信息。 我目前就读于UCLA的MAE项目(Master of Applied Economics),即应用经济学,虽然听起来比较水,但课程设置方面还是很理工科的,倾向于data science,而且在我入学前的一个月,该项目还. MAE可以准确反映实际预测误差的大小。 MAE用于评价真实值与拟合值的偏离程度,MAE值越接近于0,说明模型拟合越好,模型预测准确率越高(但是RMSE值还是使用最多的)。
这是 MAE体的架构图,预训练阶段一共分为四个部分,MASK,encoder,decoder。 MASK 可以看到一张图片进来,首先把你切块切成一个一个的小块,按格子切下来。 其中要被MASK住的这一块就是涂成一个灰色,然后没有MASK住的地方直接拎出来,这个地方75%的地方被MASK住了。 绝对平均误差(Mean Absolute Error,MAE)和平均绝对误差(Average Absolute Error)是两个用于评估预测模型准确性的指标。尽管名字相似,但它们有一些微妙的区别。 绝对平均误差(Mean Absolute Error,MAE): 计算方法: 对每个数据点的预测误差取绝对值,然后计算这些绝对误差的平均值。 公式: MAE = (1/n. MSE 和 MAE 的计算方法完全不同,你可以去搜一下公式看一下。 直观理解的话,MSE是先平方,所以 放大 了 大 误差,比如,在平稳的序列点上,MAE误差为2,在波峰波谷上MAE误差为10,那么平方以后,MSE为4和100。
如何看待meta最新的工作:将MAE扩展到billion级别(模型和数据)? The effectiveness of MAE pre-pretraining for billion-scale pretraining [图片]… 显示全部 关注者 148 被浏览
ViT (Vision Transformers)是模型结构,而 MAE 是在 ViT 结构上自监督训练的 masked encoder。 我猜题主想问的是,为什么用的都是ImageNet 或者 JFT300 这种有监督的大数据集上训练的模型,而不是自监督预训练的模型? 是否是比MAE更好的训练方式? BEIT V2的作者团队升级了BEIT,且效果有大幅提升,是否说明tokenizer的训练方式优于mae提出的像素复原方式? 总结 L1范数、L1损失和MAE损失在对异常值的鲁棒性方面优于L2范数、L2损失和MSE损失,但后者在数学上更光滑,更容易进行优化。 选择哪种损失函数取决于具体问题的需求和数据的特性。
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