Download An Introduction to Duplicate Detection by Felix Naumann, Melanie Herschel, M. Tamer Ozsu PDF

By Felix Naumann, Melanie Herschel, M. Tamer Ozsu

With the ever expanding quantity of information, info caliber difficulties abound. a number of, but assorted representations of an analogous real-world items in info, duplicates, are probably the most interesting info caliber difficulties. the results of such duplicates are harmful; for example, financial institution shoppers can receive reproduction identities, stock degrees are monitored incorrectly, catalogs are mailed a number of occasions to an identical family, and so forth. immediately detecting duplicates is hard: First, replica representations will not be exact yet a little bit vary of their values. moment, in precept all pairs of documents will be in comparison, that is infeasible for big volumes of information. This lecture examines heavily the 2 major parts to beat those problems: (i) Similarity measures are used to immediately determine duplicates while evaluating files. Well-chosen similarity measures enhance the effectiveness of replica detection. (ii) Algorithms are constructed to accomplish on very huge volumes of information in look for duplicates. Well-designed algorithms increase the potency of reproduction detection. ultimately, we speak about how you can assessment the luck of reproduction detection. desk of Contents: information detoxification: creation and Motivation / challenge Definition / Similarity capabilities / reproduction Detection Algorithms / comparing Detection good fortune / end and Outlook / Bibliography

Show description

Read Online or Download An Introduction to Duplicate Detection PDF

Best human-computer interaction books

Moderating Usability Tests: Principles and Practices for Interacting

Many elements of usability trying out were completely studied and documented. this is not actual, even though, of the main points of interacting with the try out individuals who give you the severe usability information. This omission has intended that there were no education fabrics and no ideas from which new moderators can find out how to have interaction.

New Perspectives in Information Systems and Technologies, Volume 2

This e-book encompasses a number of articles from The 2014 global convention on info platforms and applied sciences (WorldCIST'14), held among the fifteenth and 18th of April in Funchal, Madeira, Portugal, an international discussion board for researchers and practitioners to offer and talk about fresh effects and concepts, present traits, specialist reviews and demanding situations of contemporary info platforms and applied sciences learn, technological improvement and functions.

The Human Face of Ambient Intelligence: Cognitive, Emotional, Affective, Behavioral and Conversational Aspects

As a socially disruptive expertise, Ambient Intelligence is eventually directed in the direction of people and particular on the mundane existence made from an enormous richness of situations that can't totally be thought of and simply be expected. so much books, even though, concentration their research on, or deal principally with, the development of the expertise and its capability in simple terms.

Mental models : design of user interaction and interfaces for domestic energy systems

There's a resurgence of curiosity in psychological versions as a result of advances in our figuring out of ways they are often used to aid layout and thanks to the advance of useful the way to elicit them. This booklet brings either components including a spotlight on lowering family strength intake. The e-book makes a speciality of how psychological versions might be utilized in layout to carry out behaviour switch leading to elevated success of domestic heating targets (reduced waste and enhanced comfort).

Extra resources for An Introduction to Duplicate Detection

Sample text

As mentioned at the beginning of this section, the Levenshtein distance is a special case of an edit distance as it uses unit weight and three basic edit operators (insert, delete, and replace character). , when one string is a prefix of the second string (Prof. John Doe vs. John Doe) or when strings use abbreviations (Peter J Miller vs. Peter John Miller). These problems are primarily due to the fact that all edit operations have equal weight and that each character is considered individually.

4 q-gram based token similarity computation. 3. We observe that the two token sets overlap in 13 q-grams, and we have a total of 22 distinct q-grams. 59. 342 × 4 where V and W are the q-gram sets of s1 and s2 , respectively. 30 3. 2 EDIT-BASED SIMILARITY Let us now focus on a second family of similarity measures, so called edit-based similarity measures. In contrast to token-based measures, strings are considered as a whole and are not divided into sets of tokens. , insertion of characters, character swaps, deletion of characters, or replacement of characters.

We then discuss another technique, orthogonal to similarity measures, to classify pairs of candidates as duplicates or non-duplicates. 6). 24 3. 1 TOKEN-BASED SIMILARITY Token-based similarity measures compare two strings by first dividing them into a set of tokens using a tokenization function, which we denote as tokenize(·). Intuitively, tokens correspond to substrings of the original string. As a simple example, assume the tokenization function splits a string into tokens based on whitespace characters.

Download PDF sample

Rated 4.86 of 5 – based on 22 votes