Differences
This shows you the differences between two versions of the page.
courses:rg:2013:crf [2013/03/29 07:50] ufal vytvořeno |
courses:rg:2013:crf [2013/03/29 09:00] popel typos fixed |
||
---|---|---|---|
Line 10: | Line 10: | ||
(2) MEMMs suffer from Label Bias Problem. What about HMMs? Why? | (2) MEMMs suffer from Label Bias Problem. What about HMMs? Why? | ||
- | (3) Which of the following features are meaningfull? Why? | + | (3) Which of the following features are meaningful? Why? |
a) < | a) < | ||
Line 20: | Line 20: | ||
g) < | g) < | ||
h) < | h) < | ||
- | i) < | + | i) < |
- | j) < | + | j) < |
(4) Let's suppose, that we have a CRF for the data "he/N can/V can/V a/N can/N" and these features: | (4) Let's suppose, that we have a CRF for the data "he/N can/V can/V a/N can/N" and these features: | ||
Line 29: | Line 29: | ||
< | < | ||
- | a) |Y| = ? | + | a) |< |
b) Draw a CRF for given data! | b) Draw a CRF for given data! | ||
- | c) Simplify (as much as possible) the exp(...) expression in Formula 1, gived the above definitions of < | + | c) Simplify (as much as possible) the exp(...) expression in Formula 1, given the above definitions of < |
**Hint1:** The alpha-like symbol means "is directly proportional", | **Hint1:** The alpha-like symbol means "is directly proportional", |