NLP @ CU 鶹ӰԺ

"The idea of giving computers the ability to process human language is as old as the idea of computers themselves. This vibrant interdisciplinary enterprise has many names corresponding to its many facets, names like speech and language processing, human lanquage technology, natural lanquage processing and computational linquistics. The goal of this exciting field is to provide scientific insights into the nature of human language and to enable human-machine communication and improve human-human communication."


-Professor Jim Martin


Daniel Jurafsky and James H. Martin, Speech and Language Processing: An Introduction to Natural Language Processing, Computational Linguistics and Speech Recognition (2ed.), Prentice Hall 2009

The NLP Process

Training computers to accurately deal with languages is a complex process that intricately weaves together linguistic insights and computational models that reference real world contexts. The process can begin with linguistic analysis, computational models, or a combination of the two. After it’s begun, however, it usually cycles in the following manner.

An infographic describing the NLP process

The NLP Ecosystem

The NLP ecosystem is comprised of linguists, computer scientists, and domain experts, as well as the computational linguists who link these three groups together.

An infographic about the NLP ecosystem

If this entire process seems interesting to you, why not become a computational linguist?

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Featured Projects

Our faculty are engaged in research projects ranging from language documentation and morphological analysis to semantic analysis and biomedical informatics. We are also currently working on an autonomous conversational agent in a junior high through college classroom setting. Featured below are some of the projects we are most proud of, both past and present.

Ongoing

Jan28th

DARPA AIDAProgram

Autonomous Interperation ofDisparateAlternatives

Project leads

Martha Palmer

Martha Palmer

Susan Brown

Susan Brown

Jim Martin

Jim Martin

Chris Heckman

Chris Heckman

Our goal is toautomatically analyze the content of written documents and extractkey pieces of information about the events they describe, including wheredifferent news sources contradict each other.

Problem

We can’t possibly keep track of everything that is happening day to day - in the news, in medicine, in financial markets, on social media, etc.

Solution

Natural Language Processing can automatically extract key events, along with who is participating in them and the order in which they happen,to help make our job of keeping on top of things much more tractable.

Techniques Used

  • Deep Learning
  • Graph Embeddings
  • Coreference Resolution
  • Type Matching
  • Entity& Event Annotation&Recognition
  • Ontology Construction&Mapping

Ongoing

Jan 28th

THYME

Temporal History of Your Medical Events

Project leads

Martha Palmer

MarthaPalmer

Jim Martin

JimMartin

Kristin Wright-Bettener

KristinWright-Bettener

Our goal is automatically extracting the timeline of a disease and its treatment from patient records. This benefits individual patients and their doctors by providing quick, accurate summaries of a patient’s history covering several years. Moreover, aggregating together timelines for large numbers of patients can also aid in analyzing the effectiveness of alternative treatments and the development of new treatments, benefitting all patients.

Problem

Ever increasing amounts of electronic clinical data and medical subspecialization hinder the ability of doctorsand patientsto stay on top of all aspects of a patient’s medical history.

Solution

Natural Language Processing can automatically process thousands of patient records in seconds. This allows automatic identification of salient diseases, signs, symptoms, and treatments, while preserving the timeline of the patient’s medical history.

Techniques Used

  • Annotation of Temporal Relations Between Events
  • Annotation and Parsing of Abstract Meaning Representations
  • Coreference Annotation and Resolution
  • Entity & Event Annotation & Recognition

Ongoing

Jan 28th

Universal NLP

Project leads

Professor Kann

Katharina Kann

Alexis Palmer

Alexis Palmer

NLP is making immense contributions to theEnglish andChinese speaking worlds. Automating teaching to give children access to education and automatic machine translation increasing access to healthcare arejust two examples.For the rest of the world to benefit from NLP, it needs to function in their languagestoo.

Problem

The majority of the world's7000languages have limited data available for Natural Language Processing.

Solution

When we don’t have enough data to use classical NLP, there are approaches that can make up for this lack.

Techniques Used

- Transfer Learning
- Pre-training
- Multi-task Training
- Meta Learning