User talk:Jike~enwikibooks

Dice's coefficient (also known as the Dice coefficient) is a similarity measure related to the Jaccard index.

For sets X and Y of keywords used in information retrieval, the coefficient may be defined as:[1]

When taken as a string similarity measure, the coefficient may be calculated for two strings, x and y using bigrams as follows:[2]

where nt is the number of character bigrams found in both strings, nx is the number of bigrams in string x and ny is the number of bigrams in string y. For example, to calculate the similarity between:

night nacht We would find the set of bigrams in each word:

{ni,ig,gh,ht} {na,ac,ch,ht} Each set has 4 elements, and the intersection of these two sets has only one element: ht.

Plugging this into the formula, we calculate, s = (2 * 1) / (4 + 4) = 0.25

See also Jaccard index Levenshtein distance Sørensen similarity index

Notes ^ C. J. van Rijsbergen (1979) ^ Kondrak, G. et al. (2003)

References C. J. van Rijsbergen (1979) Information Retrieval (London: Butterworths) Kondrak, G., Marcu, D. and Knight, K. (2003) "Cognates Can Improve Statistical Translation Models" in Proceedings of HLT-NAACL 2003: Human Language Technology Conference of the North American Chapter of the Association for Computational Linguistics, pp. 46--48

Your account will be renamed
Hello,

The developer team at Wikimedia is making some changes to how accounts work, as part of our on-going efforts to provide new and better tools for our users like cross-wiki notifications. These changes will mean you have the same account name everywhere. This will let us give you new features that will help you edit and discuss better, and allow more flexible user permissions for tools. One of the side-effects of this is that user accounts will now have to be unique across all 900 Wikimedia wikis. See the announcement for more information.

Unfortunately, your account clashes with another account also called Jike. To make sure that both of you can use all Wikimedia projects in future, we have reserved the name Jike~enwikibooks that only you will have. If you like it, you don't have to do anything. If you do not like it, you can pick out a different name.

Your account will still work as before, and you will be credited for all your edits made so far, but you will have to use the new account name when you log in.

Sorry for the inconvenience.

Yours, Keegan Peterzell Community Liaison, Wikimedia Foundation 23:16, 17 March 2015 (UTC)

Renamed
 This account has been renamed as part of single-user login finalisation. If you own this account you can |log in using your previous username and password for more information. If you do not like this account's new name, you can choose your own using this form after logging in: . -- Keegan (WMF) (talk) 05:05, 19 April 2015 (UTC)