[Lisa_teatalk] Tea talk next Friday 1st november 15:00

Razvan Pascanu r.pascanu at gmail.com
Sat Oct 26 00:12:04 EDT 2013


Next
 week
we will have Xiaohua Liu giving a tea talk. NOTE the change of day to
Friday and time 15:00.  Please find below the title and abstract of the
talk, as well as short introduction of Xiaohua.
Hope to see many of you there !




Title:

Collective Information Extraction for Micro-blogs****

** **

Abstract:****


Within the past five years, micro-blogs have greatly developed and now
become one indispensable information source. Owing to the unstructured,
fragmented, informally written, noisy and real-time nature of micro-blogs,
it is hard for people to effectively obtain the information of their
interests from micro-blogs. ****

** **

In this talk, I will introduce the task of information extraction for
micro-blogs, which consists of a serials of sub-tasks, including Named
Entity Recognition (NER), Semantic Role Labeling (SRL) and Event Extraction
(EE). ****

** **

One main common research challenge is the dearth of information in a single
micro-blog, rooted in the short and noisy nature of micro-blogs. In this
talk, I will introduce the following three kinds of collective inference
algorithms, which are applied to NER, SRL and EE, respectively, achieving
remarkable improvements over the baselines.****

** **

1. K-nearest neighbor (KNN) classifier based joint inference that
determines the output of the current input using the outputs of the inputs
similar to the current input;****

2. Cluster based joint inference that involves the following two-stage
labeling: In the first round, one single micro-blog is processed as usual;
in the second round, similar micro-blogs are first clustered, then for each
cluster an enhanced model that utilizes cluster-level information is
applied to each micro-blog in the cluster;****

3. Graphical model based joint inference that conducts an information
extraction related task on a collection of related micro-blogs, sharing
information across micro-blogs and simultaneously determining the outputs
for all the related micro-blogs.****

** **

In the end, I will present a semantic search of micro-blogs called
QuickView, which integrates various information extraction technologies and
enables categorized browsing and advanced search of micro-blogs.****

** **

A few words about myself:****

** **

I am an affiliated postdoctoral research fellow of Professor Jian-Yun’s
team. Before I moved to Montreal, I was Project Lead and Researcher in
Microsoft Research Asia, Natural Language Computing Group.  My research
interests include big data processing, social content mining, NLP for
ranking, machine learning, etc. In recent three years I published 30+
papers in ACL, AAAI, IJCAI, EMNLP, COLING, and SIGIR.   At my free time, I
like coding and solving software development related challenges. I authored
several programming related books, including "Detailed introduction of JSP
programming" and "Mastering MFC".  I received PhD from Harbin Institute
Technology, in 2012.****

**


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