machine learning - What is the meaning of this NLP notation? -

-

I am trying to find relation extraction and learn NLP on a corpus. I found the slide and trying to parse the marking for a high dimensional feature vector (shown below).

Enter image details here

Where

Enter image details here

How do I get the most equation in an English language? Change sentence? For each input text unit, x; For every possible convenience, y - convenience x is - can one be presented by a feature vector? I am used to seeing cartesian product notation and I am used to see the function notation and I used to see set builder notation. But there are very unfamiliar things in the line that I understand what it says. What is the meaning of colon? This means that F is a function that takes input and output and takes one output. In this context, the input is usually a word sequence, and that word sequence's candidate labeling output - eg. Part-of-speech tags or sequences of a parse tree are some examples on slide 8 of Ryan McDonald's slide deck.

Macdonald also makes this point, but I repeat it here: In some cases, we can only create one attribute vector for the input sequence (without reference to any output) for example If we are tagging 2 words of the term 'f function', and our feature mapping only includes existing words and previous words, then we will include 'f' as the last word and 'as' Current sh However, in some cases (especially 'structured prediction') we would like to include features based on the labeling of the candidate - perhaps a label sequence on the whole input (note that usually huge feature space) .

Another note: The mapping of McDonald's is for a real value vector (R ^ N), but in NLP, we often find that the pointer features are adequate, so many systems give us a little more The vector (still in a very high dimensional space) does not change the formality (mapping function only), but the simplified concept is often used in weight vector collection and dot-product implementation. Will allow the capability.


Comments

Post a Comment

Popular posts from this blog

import - Python ImportError: No module named wmi -

-
I followed the instructions for downloading WMI for Python When I try to run the code for C.Win32_Service (StartMode = "Auto", state = "Stopped") import wmi c = wmi.WMI (): if Raw_input ("restart% s?"% S.Caption) .upper () == "Y": s.StartService () I got the error < Code> traceback (most recent call end): file ". \", Line 1, edit: I am using Python 2.7.6 EDIT2: I am running 64-bit Windows 2008 R2, and I've downloaded WMI-1.4.9.zip (md5). I removed the content and put it in D: Python \ Tools \ Scripts I executed dragon setup.py.install I said D : \ Python \ tools \ scripts to% PATH% and when I execute the code for C.Win32_Service (StartMode = "Auto", state = "Stopped") import wmi c = Wmi.WMI (): If raw_input ("Restart% s?"% S. Caption). () == "Y": s.StartService () error me Gets traceback (most recent call final): File ". See \", line 1, &
Read more

Editing Python Class in Shell and SQLAlchemy -

-
I am working on the terminal on a shell script after this tutorial SQLAlchemy tutorial. I need to type gt; & Gt; & Gt; Sqlalchemy import column, integer, string & gt; & Gt; & Gt; Class user (base): __tablename__ = 'users' id = column (integer, primary_key = true) name = column (string) absolute name = column (string) password = column (string) def __repr __ (self): return "& lt ; User (name = '% s', absolute name = '% s', password = '% s') & gt; "% (Self.name, self.fullname, self.password) After the problem I have typed the password = column (string) I hit twice and changed .... >> I then took everything back but then an error was thrown because the class already exists ... I am not completely sure how to fix it. How do I open that slip in the shell script and edit it (Add DF to DRR) The error thrown below: / user / giripeters / TFSQLLX / Lib / python2.7 / site-packages / sqlalchemy / ext / decla
Read more

c# - MySQL Parameterized Select Query joining tables issue -

-
I am using parameterized select questions in conjunction with my program and it works entirely, When I try to join the table Everything I have done is a small fraction: using (MySqlCommand cmd = new MySqlCommand (paramQuery) ToSql (), Connection)) /etc/ paramQuery.ToSql () Equal: "Select TableOne ID, Tableon, Department, Tablet. One by name table, Table 2 h Yes TableOnEID = @Pharmak "* / for (Int Index = 0; Index and Lt; ParamariX Parameter (.c calculation; Index ++) Cmd.Parameters.AddWithValue (paramQuery.Parameters (). ElementAt (index). , ParamQuery.Parameters (). ElementAt (index) .Value); / * ParamQuery.Parameters (). ElementAt (index) .k = "@most 0" paramQuery.Parameters (). ElementAt (index) .Value = "tableTwo.ID" * / MySqlDataReader Reader = cmd.ExecuteReader (); While (reader.Read ()) {// do stuff} } One of the tables I attempt to join is For the table, two with the same id for all. Is there something that I'm doing wrong?
Read more