How do you efficiently implement a document similarity search system? -


How do you implement the "same item" system for the objects described by a group of tags?

In my database, I have three tables, paragraphs, articles and tags. Each paragraph is related to many tags through many-to-many relationships. For each paragraph, If you like, you will also like it "Want to find five most similar articles to implement the system.

I am familiar with that algorithm and use them very well. But there is a way to slow it down for each article, I have to repeat all the articles, calculate the cosine parity for the article pair, and then select five articles with maximum equality ratings.

With 200k articles and 30k tags, it requires me to calculate similar articles for half an article one minute so I need another algorithm which is roughly good results in the form of cosine parity , But it can be run in real time and I do not need to iterate over the entire document every time.

The shelf solution for this? Most of the search engines I saw did not enable document parity search.

some questions,

  • how different article tags are different from tags ? Or is it that the M2M mapping table?
  • Can you find out the implementation of the cosine matching algorithm?
  • Why do not you store your document tags in some kind of memory data structure, to use only to recover the document ID? This way, you can only hit the database during recovery time.
  • Depending on the freq linking freq, this structure can be prepared for faster / slower updates.

Intuition towards one answer - I would say, an online clustering algorithm (probably a major component analysis on co-incident matrix, which would be the guess of the K-Earth cluster?).

Cheers.


Comments

Post a Comment

Popular posts from this blog

sql - dynamically varied number of conditions in the 'where' statement using LINQ -

I am using my first project LINQ (in mvc), so maybe there's something very simple that I remember. However, a day of searching and experimenting does not work, so it works. I am trying to write a LINQ query (Linux to SQL) in which in many cases where the statement is different from an OR or an AND. We do not know how many conditions are going in the query till runtime. This search is for filter control, where the user can choose multiple criteria for filtering. Select from table where table.col = 1 or table.col = 2 or table.col = 7 .... 'Other number of conditions Before I just create the SQL query as a string, while looping over all the situations. However, it seems that there should be a good way to do this in LINQ. I tried to use Expression trees, but they had a second thought for this moment on my head, where the lambda function was to be executed inside the statement such as: values ​​for matchingRows = matchingRows for each value Where (function (row) row.c...
Read more

asp.net mvc - Dynamically Generated Ajax.BeginForm -

I have a problem with ASP.NET MVC Ajax forms. I generate many Ajax form in a table such as: & Lt; Input type = "submit" name = "activity" value = "add activity" / & gt; & Lt;%}% & gt; & Lt; / TD & gt; & Lt; / TR & gt; & Lt;%}% & gt; So far so good. When I post one of those forms, it gives a partial view in a div, and in this new partial view a new Ajax Beginnform (which is not in Genesis form) This second Ajax Beginnorf is exactly like the ones I got on the table, but when I post it, I do not get the "Ajax Post", but a normal post that sends me to a new page, I do not know whether the two Ajax forms What is the reason for the difference between, why is it the "dynamically generated" Ajax form behaves like a normal HTML form? By the way, I know that I can do it in different ways using javascript, but I would like to understand whether it can only be done using MVC helplars and Ajax lib...
Read more

Debug on symbian -

I am using trk for phone debug This works well for the Holorld project But when I start the project in phone debug mode 1) the load failed 2) TrkProtocolPlugin: to target the specified file Failure (please verify If any body understands what problem I am experiencing, then this problem helps me Pre-release If the application has the privileges assigned (with the appropriate certificate) itemprop = "text" > In your case, I will check: / li> If there is no conflict of application ID with any other application of device If there are problematic commands in the installation package (for example copy copy for non-accessible directories)
Read more