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courses:rg:2014:mdsm [2014/11/24 16:09]
nguyenti created 		courses:rg:2014:mdsm [2014/11/29 13:52] (current)
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-1. Recall from Tam's paper presentation 3 week ago. What is the difference between: +You should focus on the first paper (you can skip section 2.3): [[http://www.aclweb.org/anthology/W11-2503.pdf|Distributional semantics from text and images]]. 
-distributional semantic and distributed semantic +The second paper [[http://www.aclweb.org/anthology/P12-1015.pdf|Distributional Semantics in Technicolor]], an extent of the first one, is optional reading. 
 + 
 + 
 +Q1.  
 +Recall the paper about word representations presented by Tam on November 10. 
 +Read http://www.quora.com/Whats-the-difference-between-distributed-and-distributional-semantic-representations 
 + 
 +(M_{w,d} is a matrix with w rows and d columns). 
 +What does w, d and k mean? 
 +What are the values of w, d and k used in the experiments in this paper? 
 + 
 +Q2. 
 +a) Compute the similarity between two words "Moon" and "Mars" from the co-occurrence matrix below. 
 +Use these raw counts (no Local Mutual Information, no normalization) and cosine similarity. 
 + 
 +           | planet | night | full | shadow | shine        
 +    Moon   |   34   |   27  |  19  |   9    |   20 
 +    Sun    |   32   |   23  |  10  |   47   |   15 
 +    Dog    |   0    |   19  |  2   |   11   |   1 
 +    Mars   |   44   |   23  |  17  |   3    |   9 
 +     
 +b) How do they deal with high dimension of vectors in those papers? 
 +Can you suggest some (other) techniques of preprocessing vectors with high dimensions? 
 +      
 +Q3.  
 +a) What are Bag of Word (BOVW) and Bag of Visual Word (BOW)? 
 +b) How do they apply BOVW to compute representation of a word (concept) from a large set of images? 
 +    
 +Q4 (bonus). 
 +When they construct text-based vectors of words from DM model 
 +they mentioned Local Mutual Information score. (section 3.2, also section 2.1 in the 2nd paper) 
 +So what is that score? Why did they use it? 
 + 
 +Q5 (bonus). 
 +Have you ever wished to see beautiful "Mermaids"? 
 +Have you ever seen "Unicorns" in the real life? 
 +"Assume that there are no photos of them on the Internet" 
 + 
 +Think about a computational way to show that how they look like? 
  
-2.  

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