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architecture. Instantiating a configuration with the defaults will yield a similar configuration to that of

The original BERT uses a subword-level tokenization with the vocabulary size of 30K which is learned after input preprocessing and using several heuristics. RoBERTa uses bytes instead of unicode characters as the base for subwords and expands the vocabulary size up to 50K without any preprocessing or input tokenization.

Instead of using complicated text lines, NEPO uses visual puzzle building blocks that can be easily and intuitively dragged and dropped together in the lab. Even without previous knowledge, initial programming successes can be achieved quickly.

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The authors experimented with removing/adding of NSP loss to different versions and concluded that removing the NSP loss matches or slightly improves downstream task performance

Passing single natural sentences into BERT input hurts the performance, compared to passing sequences consisting of several sentences. One of the most likely hypothesises explaining this phenomenon is the difficulty for a model to learn long-range dependencies only relying on single sentences.

In this article, we have examined an improved version of BERT which modifies the original training procedure by introducing the following aspects:

This is useful if you want more control over how to convert input_ids indices into associated vectors

As a reminder, the BERT base model was trained on a batch size of 256 sequences for a million steps. The authors tried training BERT on batch sizes of 2K and 8K and the latter value was chosen for training RoBERTa.

Recent advancements Aprenda mais in NLP showed that increase of the batch size with the appropriate decrease of the learning rate and the number of training steps usually tends to improve the model’s performance.

model. Initializing with a config file does not load the weights associated with the model, only the configuration.

model. Initializing with a config file does not load the weights associated with the model, only the configuration.

If you choose this second option, there are three possibilities you can use to gather all the input Tensors

Throughout this article, we will be referring to the official RoBERTa paper which contains in-depth information about the model. In simple words, RoBERTa consists of several independent improvements over the original BERT model — all of the other principles including the architecture stay the same. All of the advancements will be covered and explained in this article.