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pro vyhledávání: '"Zhang, Wangda"'
The prefix sum operation is a useful primitive with a broad range of applications. For database systems, it is a building block of many important operators including join, sort and filter queries. In this paper, we study different methods of computin
Externí odkaz:
http://arxiv.org/abs/2312.14874
Autor:
Zhang, Wangda, Interlandi, Matteo, Mineiro, Paul, Qiao, Shi, Lie, Nasim Ghazanfari Karlen, Friedman, Marc, Hosn, Rafah, Patel, Hiren, Jindal, Alekh
Publikováno v:
Proceedings of the 2022 International Conference on Management of Data 2022 Jun 10 (pp. 2299-2311)
Modern analytical workloads are highly heterogeneous and massively complex, making generic query optimizers untenable for many customers and scenarios. As a result, it is important to specialize these optimizers to instances of the workloads. In this
Externí odkaz:
http://arxiv.org/abs/2210.13625
Contextual bandits with average-case statistical guarantees are inadequate in risk-averse situations because they might trade off degraded worst-case behaviour for better average performance. Designing a risk-averse contextual bandit is challenging b
Externí odkaz:
http://arxiv.org/abs/2210.13573
Autor:
Zhang, Wangda
Big data systems such as relational databases, data science platforms, and scientific workflows all process queries over large and complex datasets. Skew is common in these real-world datasets and workloads. Different types of skew can have different
Autor:
Zhang, Wangda, Ross, Kenneth A.
Analytic queries enable sophisticated large-scale data analysis within many commercial, scientific and medical domains today. Data skew is a ubiquitous feature of these real-world domains. In a retail database, some products are typically much more p
Externí odkaz:
http://arxiv.org/abs/1910.10063
Autor:
Zhang, Wangda, 张望达
The prevalence of graphs in emerging applications has recently raised a lot of research interests. To acquire interesting information hidden in large graphs, tasks including link prediction, collaborative recommendation, and reputation ranking, all m
Externí odkaz:
http://hdl.handle.net/10722/196484
Autor:
Liu, Shiguang, Zhang, Wangda
Publikováno v:
In Simulation Modelling Practice and Theory February 2013 31:52-62
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Akademický článek
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Publikováno v:
ACM International Conference Proceeding Series; 7/7/2020, p1-12, 12p