In Chambers's work, discriminative classifiers -maximum entropy (MaxEnt) classifiers were used by incorporating linguistic features and temporal constraints for training, which outperforms the previous temporal language models on a subset of Gigaword Corpus (Graff et al., 2003).
the conventional methods have some limitations because they predict creation time of documents mainly based on feature-based models without understanding content of documents, which may lead to wrong predictions in some cases.