Hong Hanh

Vietnamese translation - Chapter 0

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As mentioned in https://github.com/huggingface/course/issues/292, I translated into Vietnamese. **0 - Setup** - [x] [`1.mdx`](https://github.com/huggingface/course/blob/main/chapters/vi/chapter0/1.mdx) **1 - Transformer models** - [x] [`1.mdx`](https://github.com/huggingface/course/blob/main/chapters/vi/chapter1/1.mdx) - [x] [`2.mdx`](https://github.com/huggingface/course/blob/main/chapters/vi/chapter1/2.mdx) - [x] [`3.mdx`](https://github.com/huggingface/course/blob/main/chapters/vi/chapter1/3.mdx) - [x] [`4.mdx`](https://github.com/huggingface/course/blob/main/chapters/vi/chapter1/4.mdx)...

Hi there 👋 Let's translate the course to `Vietnamese` so that the whole community can benefit from this resource 🌎! Below are the chapters and files that need translating -...

Hi Sebastian, I would like to update my work on improving NER using the combination of contextual information from XLNet and global information from GCN to boost NER performance in...

Hi there 👋 Let's translate the course to Vietnamese so that the whole community can benefit from this resource 🌎! Below are the chapters and files that need translating -...

[TRANSLATION] Update vietnamese version - full

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@ngxson please feel free to review it. After your review and approval, @burtenshaw please check for final approval. Thanks.

fix: replace columns with many nulls with missing indicators

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## Fixes Fixes #1714 ## Description This PR replaces columns with many nulls with missing indicators. Instead of dropping columns that exceed the drop_null_fraction threshold, replace them with missing indicator...