دورية أكاديمية
Keyword Search in Large-Scale Databases with Topic Cluster Units
| العنوان: | Keyword Search in Large-Scale Databases with Topic Cluster Units |
|---|---|
| المؤلفون: | Wang, Yingqi, Wang, Nianbin, Zhou, Lianke |
| المصدر: | Tehnički vjesnik ; ISSN 1330-3651 (Print) ; ISSN 1848-6339 (Online) ; Volume 25 ; Issue 3 |
| بيانات النشر: | Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek |
| سنة النشر: | 2018 |
| المجموعة: | Hrčak - Portal of scientific journals of Croatia / Portal znanstvenih časopisa Republike Hrvatske |
| مصطلحات موضوعية: | clustering, keyword search, relational databases, subject indexes, topic cluster units |
| الوصف: | To solve the inefficiency of the existing keyword search methods in large databases, this paper proposes TCU-based query, an offline query method based on topic cluster units. First, topic cluster units (TCUs) are constructed through vertical grouping and horizontal grouping on tables and tuples. In contrast to traditional keyword query methods, this offline method cannot only reduce the query response time, but also return results comprising richer and more complete semantic information. In order to further improve the efficiency of data preprocessing, an optimized solution for table join ordering based on the genetic algorithm is presented. Second, we select index terms using the association rule, and then we build an index on every topic cluster; by doing so we can improve the query speed significantly. Finally, we conduct extensive experiments to demonstrate that our approach greatly improves the performance of keyword search. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| العلاقة: | https://hrcak.srce.hr/202609Test |
| الإتاحة: | https://doi.org/10.17559/TV-20160419053402Test https://hrcak.srce.hr/202609Test https://hrcak.srce.hr/file/298261Test |
| حقوق: | info:eu-repo/semantics/openAccess ; TEHNIČKI VJESNIK - TECHNICAL GAZETTE is an Open Access journal. All content is made freely available. Users are allowed to copy and redistribute, and alter, transform, or build upon the material as long as they attribute the source in an appropriate manner. |
| رقم الانضمام: | edsbas.11337750 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |