NLP Classifier Models & Metrics

Presented by: Sanghamitra Deb – Staff Data Scientist at Chegg

Natural Language Processing is the capability of providing structure to unstructured data which is at the core of developing Artificial Intelligence centric technology. NLP classification helps us tag data with categories such as sentiments expressed in reviews or concepts associated with texts. In this talk I will go into details of NLP classifications — (1) importance of data collection , (2) a deep dive into models and (3) the metrics necessary to measure the performance of the model.

In order to gain a proper understanding of modeling I will explain traditional NLP techniques using TFIDF approaches and go into details of different deep learning architectures such as feed forward neural network and convolutional neural network (CNN). I will talk about the different components of building a network such as loss function, activation function. Along with these concepts I will also show code snippets in keras to build the classifier. I will conclude with some of the metrics commonly used in measuring the performance of the classifier. At the end of the presentation the audience will be armed with tools and concepts necessary to build their own NLP classifier.