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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. kaiming的论文mae中,使用的遮掩比例是75,并在此取得最好的成绩。 如下图 虽然从实验可以得知75是性价比最高的选择,但是为什么在遮掩75后,… 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。
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)。 MAE编码器 MAE的编码器是一个ViT,但只应用与可见的、未屏蔽的补丁。 就像在标准的ViT中一样,MAE的编码器通过添加了位置嵌入的线性投影来嵌入补丁,然后通过一系列Transformer块来处理结果集。 然而,MAE的编码器只对全集的一小部分(例如25%)进行操作。 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。
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?
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。 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 迈阿密之光:Alex Mae的绚烂与淡出 | 在璀璨的演艺圈中,总有那么一些如流星般短暂而耀眼的存在,Alex Mae便是其中之一。这位来自佛罗里达州迈阿密的海滨美女,用她独特的魅力,短暂地照亮了我们的视线。1997年1月…
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