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courses:rg:2014:mdsm [2014/11/25 21:23]
nguyenti 		courses:rg:2014:mdsm [2014/11/29 13:52] (current)
popel
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-1. Recall from the paper presented by Tam 3 week ago.  +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]]. 
-   a. What is the difference between distributional semantic and distributed semantic representation? +The second paper [[http://www.aclweb.org/anthology/P12-1015.pdf|Distributional Semantics in Technicolor]], an extent of the first one, is optional reading.
-   b. What is maximum size of word vector in distributional representation approach?+
  
-2. What is the vector representation of word "Moon" and "Sun" 
-from co-occurrence matrix below: 
  
-       | planet | night | full | shadow | shine  +Q1.  
-Moon   |   34   |   27  |  19  |   9    |   20 +Recall the paper about word representations presented by Tam on November 10. 
-Sun    |   32   |   23  |  10  |   47   |   15 +Read http://www.quora.com/Whats-the-difference-between-distributed-and-distributional-semantic-representations
-Dog    |   0    |   19  |  2   |   11   |   1 +
-Mars   |   44   |   23  |  17  |   3    |   9+
  
 +(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?
  
-3. a. What are Bag of Word (BOVW) and Bag of Visual Word (BOW)? Are they synonyms? +Q2. 
-   b. How do they apply BOVW to compute representation of a word (concept) +a) Compute the similarity between two words "Moon" and "Mars" from the co-occurrence matrix below. 
-   from a large set of Images?+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?
  
-5. Have you ever wish to see a beautiful Mermaids. +Q5 (bonus). 
-Have you ever seen "Unicorns" in the real lie. +Have you ever wished to see beautiful "Mermaids"? 
-Can you think a computational way to show that how they look like?+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?
  
  

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