Solving empty result problem in keyword search over relational databases

Ngày tải lên: 19/03/2014, 14:08

... Cryptology Computer science Computer science Mechanical engineering Mechatronics Electrical engineering Section Bioinformatics is the use of computer science to maintain, analyze, and store biological ... science Computer science Philosophy Engineering and robotics Artificial intelligence • Psychology Linguistics • Forensic science Computer science Computer forensics • Law enforcement Mat...

Ngày tải lên: 19/03/2014, 14:08

... DNA evidence thus reunites more evidence against the matching suspect Bayesian network for a database search setting: suspect and one other individual in the database The Bayesian network earlier ... may focus directly on the following sections: Bayesian network for the island problem, ’ Bayesian network for a database search setting: suspect and one o...

Ngày tải lên: 23/03/2014, 12:20

... Solving Problems in Food Engineering Stavros Yanniotis, Ph.D Author Solving Problems in Food Engineering Stavros Yanniotis, Ph.D Department of Food Science and Technology ... zero at the critical point 19 Superheated steam is preferred to saturated steam as a heating medium in the food industry S Yanniotis, Solving Problems in Food Engineering Ó Springer 2008 Use...

Ngày tải lên: 26/03/2014, 09:05

... derived only once or several times depending on the approach used in the inverse problem and has been discussed in the corresponding review on solving the forward problem [2] Then, in conjunction ... Introducing Anatomo-Functional Priors in the EEG/ MEG Inverse Problem IEEE Transactions on Biomedical Engineering 1997, 44(5):374-385 Pascual-Marqui RD: Re...

Ngày tải lên: 19/06/2014, 08:20

... source configurations are needed A review on solving the inverse problem is given in [3] In this review article several aspects of solving the forward problem in EEG source localization will be discussed ... configuration The inverse problem attempts to find the electrical source which generates a measured EEG By solving the inverse problem, repe...

Ngày tải lên: 19/06/2014, 10:20

... transmitted in any form or by any means—electronic, mechanical, photocopy, recording, or any other except for brief quotations in printed reviews, without the prior permission of the publisher Keyword Search ... Series ISSN Synthesis Lectures on Data Management ISSN pending Keyword Search in Databases Jeffrey Xu Yu, Lu Qin, and Lijun Chang Chinese University of Hong Kong SYNTHES...

Ngày tải lên: 05/07/2014, 23:22

... Steiner Tree-Based Keyword Search 53 3.3.1 Backward Search 53 3.3.2 Dynamic Programming 55 3.3.3 Enumerating Q-subtrees with Polynomial Delay 3.4 Distinct ... Root-Based Keyword Search 69 3.4.1 Bidirectional Search 3.4.2 Bi-Level Indexing 69 71 3.4.3 External Memory Data Graph 3.5 57 73 Subgraph-Based Keyword Search ... 21 2.3.1 Getting All MTJNT s in a Relational Databas...

Ngày tải lên: 05/07/2014, 23:22

... weights), or both In Chapter 2, we focus on supporting keyword search in an rdbms using sql Since this implies making use of the database schema information to issue sql queries in order to find ... etc In Chapter 5, we highlight several interesting research issues regarding keyword search on databases The topics include how to select a database among many possible databases to...

Ngày tải lên: 05/07/2014, 23:22

... Total: each keyword in the query must be contained in at least one tuple of the joining network • Minimal: a joining network of tuples is not total if any tuple is removed Because it is meaningless ... is included in the result of such a selection select * from R where contain(A1 , k1 ) or contain(A2 , k1 ) An l -keyword query returns a set of answers, where an answer is a minimal to...

Ngày tải lên: 05/07/2014, 23:22

... calling CNGen Duplicates that are generated from the same root following different insertion order for the remaining nodes are eliminated by the second condition in the legal node testing (line ... is shown in Algorithm and will be discussed later After processing Ri , the whole space can be divided into two subspaces as discussed in Property-5 by simply removing Ri from GX (line 4), an...

Ngày tải lên: 05/07/2014, 23:22

... joins in order to avoid intermediate join results becoming very SCHEMA-BASED KEYWORD SEARCH ON RELATIONAL DATABASES Join SemiJoin-Join 1M 100K 10K 10M # Temp Tuples 10M # Temp Tuples 26 Join ... evaluated using joins in DISCOVER or S-KWS A join plan is shown in Figure 2.9(b) to process the CN in Figure 2.9(a) using projects and joins The resulting relation, the output of the join...

Ngày tải lên: 05/07/2014, 23:22

... Global-Pipelined algorithm, i.e., it can make Q and topk global to maintain the set of combinations in multiple CN s 2.4 OTHER KEYWORD SEARCH SEMANTICS Processed Area M2 Single−Pipelined M1 33 M2 Skyline−Sweeping ... processed combinations for the Skyline-Sweeping algorithm is shown in Figure 2.15 When there are multiple CN s, it can change the Skyline-Sweeping algorithm using the si...

Ngày tải lên: 05/07/2014, 23:22

... Vk is a set of keyword- tuples where a keyword- tuple vk ∈ Vk contains at least a keyword, and all l keywords in the given l -keyword query must appear in at least one keyword- tuple in Vk ; Vc is ... can be possibly included in a result, and Tmax specifies the maximum number of nodes to be included in a result Distinct Core/Root in rdbms: We outline the approach to process l...

Ngày tải lên: 05/07/2014, 23:22

... more keyword, however we are more interested in finding results that contains all keywords In our case, it is possible that all keywords have matching tuples in the database, but the reason of empty ... combination presents more interesting information r-radius Steiner Graph Semantics Inspired from the Steiner tree problem, EASE [24] introduced the r-radius Steiner graph to model k...

Ngày tải lên: 12/10/2015, 17:35