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courses:rg:2013:memm [2013/03/19 00:05] popel |
courses:rg:2013:memm [2013/03/22 14:54] popel |
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| When implementing MEMM you need to define s_0, i.e. the previous state before the first token. It may be a special NULL, but for simplicity let’s define it as N. | When implementing MEMM you need to define s_0, i.e. the previous state before the first token. It may be a special NULL, but for simplicity let’s define it as N. | ||
| a) What are the states (s) and observations (o) for this training data? | a) What are the states (s) and observations (o) for this training data? | ||
| - | b) Equation (2) defines features f_a based on // | + | b) Equation (2) defines features f_a based on // |
| c) Equation (3) defines constraints. How many such constraints do we have? | c) Equation (3) defines constraints. How many such constraints do we have? | ||
| d) List all the constraints involving feature b2, i.e. substitute (whenever possible) concrete numbers into Equation (3). | d) List all the constraints involving feature b2, i.e. substitute (whenever possible) concrete numbers into Equation (3). | ||