Which approach will provide the MAXIMUM performance boost?
Initialize the words by term frequency-inverse document frequency (TF-IDF) vectors pretrained on a large collection of news articles related to the energy sector.
Use gated recurrent units (GRUs) instead of LSTM and run the training process until the validation loss stops decreasing.
Reduce the learning rate and run the training process until the training loss stops decreasing.
Initialize the words by word2vec embeddings pretrained on a large collection of news articles related to the energy sector.
Explanations:
TF-IDF vectors do not capture semantic relationships between words, limiting their ability to represent context effectively. Pretrained embeddings like word2vec or contextual embeddings such as BERT would be more beneficial for understanding the nuances in the text related to risk factors.
While GRUs can be more efficient than LSTMs in some scenarios, simply switching to GRUs without addressing the underlying issues of data representation or other factors may not yield a significant performance boost. Additionally, running training until validation loss stops does not ensure optimal performance if the input features are not well-represented.
Reducing the learning rate can help in achieving a more stable training process, but it is unlikely to provide a maximum performance boost if the model is fundamentally limited by how words are represented in the input data. Performance improvements are more effectively realized through better initial word representations.
Using pretrained word2vec embeddings allows the model to leverage semantic knowledge from a large corpus, capturing contextual relationships between words, which is crucial for accurately identifying risk in the text. This approach can significantly enhance the model’s ability to analyze and categorize sentences effectively.
I judge that the answer is:
Initialize the words by word2vec embeddings pretrained on a large collection of news articles related to the energy sector.