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

By Felix Naumann, Melanie Herschel, M. Tamer Ozsu

With the ever expanding quantity of information, info caliber difficulties abound. a number of, but diverse representations of an analogous real-world gadgets in facts, duplicates, are some of the most interesting facts caliber difficulties. the results of such duplicates are dangerous; for example, financial institution consumers can receive reproduction identities, stock degrees are monitored incorrectly, catalogs are mailed a number of instances to an identical loved ones, and so on. immediately detecting duplicates is tough: First, replica representations should not exact yet somewhat range of their values. moment, in precept all pairs of documents may be in comparison, that is infeasible for giant volumes of information. This lecture examines heavily the 2 major elements to beat those problems: (i) Similarity measures are used to immediately establish duplicates whilst evaluating documents. 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 tips on how to overview the luck of reproduction detection. desk of Contents: facts detoxification: advent and Motivation / challenge Definition / Similarity features / replica Detection Algorithms / comparing Detection good fortune / end and Outlook / Bibliography

Show description

Read or Download An Introduction to Duplicate Detection PDF

Best human-computer interaction books

Handbook of research on developments in e-health and telemedicine: technological and social perspectives

The instruction manual of analysis on advancements in E-Health and Telemedicine: Technological and Social views addresses the most concerns, demanding situations, possibilities, and developments with regards to fields of on-line wellbeing and fitness and clinical learn. This compilation disseminates the newest findings during this study box to remodel the way in which we are living and convey prone.

Voice Interaction Design. Crafting the New Conversational Speech Systems

''This isn't really easily a cookbook: Voice interplay layout teaches craftsmanship via offering a vast and deep knowing of speech in addition to publicity to the present country of voice interfaces. Harris's ebook deals precious insights for the considerate voice interface fashion designer. '' --Clifford Nass, Professor, Stanford collage, writer of The Media Equation and Voice Activated: How people Are stressed for Speech and the way pcs Will converse With Us ''This is that infrequent publication in Human desktop interplay all of us desire for: the presentation of a realistic layout method for an rising very important zone that's rigorously built out of assisting technology.

Calm Technology: Principles and Patterns for Non-Intrusive Design

How are you going to layout know-how that turns into part of a user's lifestyles and never a distraction from it? This functional e-book explores the concept that of calm know-how, a mode for easily taking pictures a user's awareness basically whilst precious, whereas flippantly closing within the historical past more often than not. you are going to easy methods to layout items that paintings good, release good, are effortless to help, effortless to take advantage of, and stay unobtrusive.

Dynamic Products: Shaping Information to Engage and Persuade

This ebook explores how dynamic adjustments in items' sensory positive factors can be utilized to exhibit info to the consumer in a good and fascinating method. the purpose is to provide the reader with a transparent figuring out of an enormous rising region of analysis and perform in product layout, often called dynamic items, that is starting up new chances for the combination of product layout with electronic and clever applied sciences and providing a substitute for using electronic interfaces.

Additional info for An Introduction to Duplicate Detection

Example text

Due to its high computational complexity, it is rarely used for duplicate detection. 6 RULE-BASED RECORD COMPARISON Up to this point, we have discussed similarity measures and distance measures that compute a realvalued score. This score is then input to a duplicate classifier as described at the beginning of this chapter (see p. 23). As a reminder, if the similarity score, as returned by a similarity measure, is above a given threshold θ, the compared pair of candidates is classified as a duplicate and as a non-duplicate, otherwise.

It is interesting to note that the order of rules in a profile that mixes positive and negative rules affects the final output, in contrast to equational theory where the output is always the same no matter the order of the rules. 12. Then, the pair of Persons with respective ssn of 678 and 679 would be classified as non-duplicates and they would not be passed on to the classifier using Rule 3, so they are not classified as duplicates. Both positive rules and negative rules only use information that is present in both candidates.

An aggregation function A then aggregates the individual weight. Using the two extensions above, the hybrid Jaccard similarity is defined as HybridJaccard = A(ti ,tj )∈Shared(s1 ,s2 ) w(ti , tj ) A(ti ,tj )∈Shared(s1 ,s2 ) w(ti , tj ) + A(ti )∈Unique(s1 ) w(ti ) + A(tj )∈Unique(s2 ) w(tj ) Note that instead of a secondary string similarity measure, we may also use a string distance measure to identify similar tokens. In this case, we simply replace TokenSim(ti , tj ) > θstring by TokenDist(ti , tj ) ≤ θstring .

Download PDF sample

Rated 4.30 of 5 – based on 10 votes