By Li Yan, Zongmin Ma

ISBN-10: 160960475X

ISBN-13: 9781609604752

ISBN-10: 1609604768

ISBN-13: 9781609604769

Databases are designed to aid info garage, processing, and retrieval actions concerning facts administration. using databases in a number of purposes has ended in an incredible wealth of information, which populates many varieties of databases round the world.Advanced Database question platforms: innovations, functions and applied sciences makes a speciality of applied sciences and methodologies of database queries, XML and metadata queries, and purposes of database question platforms, aiming at supplying a unmarried account of applied sciences and practices in complicated database question platforms. This e-book offers the state-of-the-art info for lecturers, researchers and practitioners who're drawn to the examine, use, layout and improvement of complicated and rising database queries with final goal of creating capabilities for exploiting the possibilities of the knowledge and information society.

Show description

Read or Download Advanced Database Query Systems: Techniques, Applications and Technologies PDF

Best storage & retrieval books

New PDF release: Semantic Web and Peer-to-Peer: Decentralized Management and

Like the commercial society of the final century relied on usual assets, cutting-edge society relies on info and its trade. Semantic internet applied sciences tackle the matter of knowledge complexity by way of supplying complicated help for representing and processing allotted info, whereas peer-to-peer applied sciences tackle problems with process complexity by means of permitting versatile and decentralized details garage and processing.

Interactive Distributed Multimedia Systems and - download pdf or read online

The 1st foreign Workshop on Interactive allotted Multimedia platforms and Telecommunication providers (IDMS) used to be geared up by means of Prof. okay. Rothermel and Prof. W. Effelsberg, and happened in Stuttgart in 1992. It had the shape of a countrywide discussion board for dialogue on multimedia matters with regards to communications.

Read e-book online Research on Industrial Security Theory PDF

This booklet bargains a scientific dialogue and rationalization on what business safeguard is, what the influencing components of business safety are, how commercial defense might be evaluated and the way early warnings should still paintings from the perspective of constructing nations. learning theories of business safety is important for the advance of business economics conception, recommendations in business economic system reviews, and a massive complement to and development at the theories of commercial economics.

The Semantic Web: Trends and Challenges: 11th International - download pdf or read online

This booklet constitutes the refereed complaints of the eleventh prolonged Semantic internet convention, ESWC 2014, held in Anissaras, Crete, Greece France, in could 2014. The 50 revised complete papers offered including 3 invited talks have been rigorously reviewed and chosen from 204 submissions. they're geared up in topical sections on cellular, sensor and semantic streams; providers, tactics and cloud computing; social net and net technology; information administration; usual language processing; reasoning; desktop studying, associated open information; cognition and semantic internet; vocabularies, schemas, ontologies.

Extra resources for Advanced Database Query Systems: Techniques, Applications and Technologies

Example text

The queries q2, q4, q6 and q15 produce alternative answers to the original query q: (q2) all employees under 30 who earn at least 40K€; (q4) all female employees under 32 who earn at least 40K€; (q6) all female employees under 31 who earn at least 39K€; and (q15) all female employees under 30 who earn at least 37K€. These answers can be delivered by SEAVE to the user as ‘the best it could do’ to satisfy the query q. , various combinations of the values of attributes) to identify MGSs/XGFs. CoBase The CoBaseiii (Chu, Yang, Chiang, Minock, Chow & Larson, 1996) system augments the database with Type Abstraction Hierarchies (TAHs) to control the query generalization process.

We experiment with datasets generated for the following parameters: n = 300, m = 600, l = {4, 8, 16, 32}, noise = {2, 4, 8,…, 128} for swaps. Figure 6 shows the performance of the algorithms as a function of the amount of noise. The y axis is the ratio: F(A)/F(INP), for A = {Greedy, Greedy-Refine}, where the Greedy- Refine algorithm is proposed in this chapter (Algorithm 3), while the Greedy algorithm is proposed in [2]. We compare them here since they all aim at solving the same problem (clustering problem).

The task of the algorithms is to rediscover the clustering model used for the data generation. Given a cluster center, each query from the same cluster is generated by adding to the center a specified amount of noise of a specific type. We consider two types of noise: swaps and shifts. The swap means that ‘0’ and ‘1’ elements from the initial order are picked and their positions in the order are exchanged. For the shifts we pick a random element and we move it to a new position, either earlier (or later) in the order.

Download PDF sample

Advanced Database Query Systems: Techniques, Applications and Technologies by Li Yan, Zongmin Ma


by Edward
4.5

Rated 4.14 of 5 – based on 26 votes