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【Hackathon No.17】 #52
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PR格式检查通过,你的PR将接受Paddle专家以及开源社区的review,请及时关注PR动态。 |
CosineEmbeddingLoss的API设计为`torch.nn.CosineEmbeddingLoss(margin=0, reduction='mean')`,cosine_embedding_loss的API设计为`torch.nn.functional.cosine_embedding_loss(x1, x2, target)` | ||
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整体设计与paddle保持一致,其中: |
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这里存在两个问题:
- torch / paddle 写反了;
- 对比竞品,这里设计的参数少了一些,需要明确写一下这么设计的理由。
1. 使用`paddle.zero`初始化结果列表 | ||
2. 使用`paddle.matmul`实现向量点乘 | ||
3. 使用`paddle.norm`实现向量二次范数相乘 | ||
4. 使用paddle API`sum` 和`mean` 实现reduction计算 |
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从竞品实现方式看,对正负样本的处理是有一些区别的;在该设计中是否有呢?如有,建议在此处明确写一下。
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- 动态图,静态图,与numpy的结果保持一致; | ||
- 输入含`NaN`结果的正确性; | ||
- 错误检查:`input`和 `target`维度不为不合规时能抛出输入维度错误; |
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这里两个问题:
维度不为不合规
,语句有些不通顺- 测试中需要包含涉及的参数,在此处需要补充一下margin/reduction等参数的测试
1. 首先判定输入维度是否正确 | ||
2. 计算向量点乘`prod_sum`和向量二阶范式乘积`denom` | ||
3. 求出余弦相似度`cos = prod_sum / denom` | ||
4. 计算出正负样本损失值总和`output` |
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竞品代码中对正负样本的处理过程,也可以在这里补充一下
针对上述建议已进行修改,请查阅。 |
你的PR有最新反馈,请及时修改。 |
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CosineEmbeddingLoss的API设计为`paddle.nn.CosineEmbeddingLoss(margin=0, reduction='mean')`,cosine_embedding_loss的API设计为`paddle.nn.functional.cosine_embedding_loss(x1, x2, target, margin=0, reduction='mean')` | ||
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整体设计与paddle保持一致,其中: |
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这个地方还需要改一下,与Pytorch
一致
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这里与pytorch的差异在于size_average
和reduce
两个参数,在设计文档有提到这两个参数在pytorch中已经弃用了,请问与pytorch保持一致的话不实现具体功能可以吗
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这里可能是我没表达清楚意思:
- 关于
size_average
和reduce
的差异,之前的设计已经写得挺清楚了,没有问题。这里主要是指整体设计与paddle保持一致
这句话有语病的小问题,当前是为paddle新增的API,为什么会与paddle保持一致?这里直接删掉这句话是否更清晰一些 - 参数的设置上,根据此前的调研结论,不必再新增
size_average
和reduce
,仍然保持上一版的设计即可。
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了解,已修改
- 错误检查:`input`和 `target`维度不合规时能抛出输入维度错误; | ||
- 错误检查:`margin`设置超出[-1, 1]范围时抛出参数设置错误; | ||
- 错误检查:`reduction`设置除`sum` 和`mean`以外时抛出参数设置错误; | ||
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这里还请参考下API测试内容及单元测试要求的几点内容补充一下测试用例的设计:例如gpu/cpu;支持的dtype等。
已修改 |
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LGTM
你的PR已合入community库,请进行后续代码开发,并将代码提交至Paddle仓库。 |
为 Paddle 新增 paddle.nn.CosineEmbeddingLoss 和 paddle.nn.functional.cosine_embedding_loss API