Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Wangchao Le"'
Autor:
Sunny Gakhar, Joyce Cahoon, Wangchao Le, Xiangnan Li, Kaushik Ravichandran, Hiren Patel, Marc Friedman, Brandon Haynes, Shi Qiao, Alekh Jindal, Jyoti Leeka
Publikováno v:
Proceedings of the VLDB Endowment. 15:3710-3713
We demonstrate Pipemizer , an optimizer and recommender aimed at improving the performance of queries or jobs in pipelines. These job pipelines are ubiquitous in modern data analytics due to jobs reading output files written by other jobs. Given that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c381f0b58d8d21e039142594d7799fe
https://doi.org/10.14778/3554821.3554881
https://doi.org/10.14778/3554821.3554881
Publikováno v:
SIGMOD Conference
Query processing over big data is ubiquitous in modern clouds, where the system takes care of picking both the physical query execution plans and the resources needed to run those plans, using a cost-based query optimizer. A good cost model, therefor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dc980e3f80acb7b7ffd7713d08618acd
Publikováno v:
IEEE Transactions on Knowledge and Data Engineering. 26:2774-2788
Keyword search is a useful tool for exploring large RDF datasets. Existing techniques either rely on constructing a distance matrix for pruning the search space or building summaries from the RDF graphs for query processing. In this work, we show tha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a3be3402c5fd1dc512790f49a5de069
https://doi.org/10.1109/tkde.2014.2302294
https://doi.org/10.1109/tkde.2014.2302294
Autor:
Feifei Li, Wangchao Le
Publikováno v:
IEEE Transactions on Services Computing. 5:178-191
Query execution assurance is an important concept in defeating lazy servers in the database as a service model. We show that extending query execution assurance to outsourced databases with multiple data owners is highly inefficient. To cope with laz
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::48e12ca03011b8a0f09ca79181ef84d5
https://doi.org/10.1109/tsc.2010.55
https://doi.org/10.1109/tsc.2010.55
Publikováno v:
The VLDB Journal. 19:715-733
The database community has devoted extensive amount of efforts to indexing and querying temporal data in the past decades. However, insufficient amount of attention has been paid to temporal ranking queries. More precisely, given any time instance t,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::09a5b2247cd2000bfef7aa5b72f54fa9
https://doi.org/10.1007/s00778-010-0186-6
https://doi.org/10.1007/s00778-010-0186-6
Publikováno v:
ICDE
This paper revisits the classical problem of multi-query optimization in the context of RDF/SPARQL. We show that the techniques developed for relational and semi-structured data/query languages are hard, if not impossible, to be extended to account f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::471ea7e12755c5014e7a331357e2cfb5
https://doi.org/10.1109/icde.2012.37
https://doi.org/10.1109/icde.2012.37
Publikováno v:
WWW
The problem of answering SPARQL queries over virtual SPARQL views is commonly encountered in a number of settings, including while enforcing security policies to access RDF data, or when integrating RDF data from disparate sources. We approach this p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::029ab2fd7d7cd2af8c3ac5e2856619c2
https://doi.org/10.1145/1963405.1963497
https://doi.org/10.1145/1963405.1963497
Autor:
Wangchao Le, Shaofa Li
Publikováno v:
ISSPA
Texts in scene images provide important information for indexing and searching. If these texts can be correctly located, segmented and recognized, they could provide a semantic source for scene understanding. In this paper, we propose a method to mod
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c91c7241b00093e8bb6a08507d623fa2
https://doi.org/10.1109/isspa.2007.4555475
https://doi.org/10.1109/isspa.2007.4555475
Autor:
Shaofa Li, Wangchao Le
Publikováno v:
ICPR (2)
This paper presents a hybrid method for extracting license plates from cluttered images. The proposed algorithm consists of three major components. First, a line detection method is proposed to detect straight lines in the edge map. Second, a weight
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1cbeba21081ea20ec6a90b4dd9b39a46
https://doi.org/10.1109/icpr.2006.83
https://doi.org/10.1109/icpr.2006.83
Autor:
Wangchao Le, Shaofa Li
Publikováno v:
18th International Conference on Pattern Recognition (ICPR'06); 2006, p324-327, 4p