Speeding up Continuous kNN Join by Binary Sketches

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14330%2F18%3A00100950" target="_blank" >RIV/00216224:14330/18:00100950 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/978-3-319-95786-9_14" target="_blank" >http://dx.doi.org/10.1007/978-3-319-95786-9_14</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/978-3-319-95786-9_14" target="_blank" >10.1007/978-3-319-95786-9_14</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Speeding up Continuous kNN Join by Binary Sketches

Popis výsledku v původním jazyce

Real-time recommendation is a necessary component of current social applications. It is responsible for suggesting relevant newly published data to the users based on their preferences. By representing the users and the published data in a metric space, each user can be recommended with their k nearest neighbors among the published data, i.e., the kNN join is computed. In this work, we aim at a frequent requirement that only the recently published data are subject of the recommendation, thus a sliding time window is defined and only the data published within the limits of the window can be recommended. Due to large amounts of both the users and the published data, it becomes a challenging task to continuously update the results of the kNN join as new data come into and go out of the sliding window. We propose a binary sketch-based approximation technique suited especially to cases when the metric distance computation is an expensive operation (e.g., the Euclidean distance in high dimensional vector spaces). It applies cheap Hamming distances to skip over 90% of the expensive metric distance computations. As revealed by our experiments on 4,096 dimensional vectors, the proposed approach significantly outperforms compared existing approaches.

Název v anglickém jazyce

Speeding up Continuous kNN Join by Binary Sketches

Popis výsledku anglicky

Real-time recommendation is a necessary component of current social applications. It is responsible for suggesting relevant newly published data to the users based on their preferences. By representing the users and the published data in a metric space, each user can be recommended with their k nearest neighbors among the published data, i.e., the kNN join is computed. In this work, we aim at a frequent requirement that only the recently published data are subject of the recommendation, thus a sliding time window is defined and only the data published within the limits of the window can be recommended. Due to large amounts of both the users and the published data, it becomes a challenging task to continuously update the results of the kNN join as new data come into and go out of the sliding window. We propose a binary sketch-based approximation technique suited especially to cases when the metric distance computation is an expensive operation (e.g., the Euclidean distance in high dimensional vector spaces). It applies cheap Hamming distances to skip over 90% of the expensive metric distance computations. As revealed by our experiments on 4,096 dimensional vectors, the proposed approach significantly outperforms compared existing approaches.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10201 - Computer sciences, information science, bioinformathics (hardware development to be 2.2, social aspect to be 5.8)

Projekt

<a href="/cs/project/GA16-18889S" target="_blank" >GA16-18889S: Analytika pro velká nestrukturovaná data</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Advances in Data Mining

ISBN

9783319957852

ISSN

0302-9743

e-ISSN

—

Počet stran výsledku

16

Strana od-do

183-198

Název nakladatele

Springer

Místo vydání

Cham

Místo konání akce

New York, USA

Datum konání akce

11. 7. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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