Reptile: Aggregation-level Explanations for Hierarchical Data
Reptile: Aggregation-level Explanations for Hierarchical Data
复制标题
Reptile:分层数据的聚合级解释
DOI:
10.1145/3514221.3517854
复制
发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Wu, Eugene
中科院分区:
文献类型:
--
作者:
Huang, Zezhou;Wu, Eugene
Users often can see from overview-level statistics that some results look "off", but are rarely able to characterize even the type of error. Reptile is an iterative human-in-the-loop explanation and cleaning system for errors in hierarchical data. Users specify an anomalous distributive aggregation result (a complaint), and Reptile recommends drill-down operations to help the user "zoom-in" on the underlying errors. Unlike prior explanation systems that intervene on raw records, Reptile intervenes by learning a group's expected statistics, and ranks drill-down sub-groups by how much the intervention fixes the complaint. This group-level formulation supports a wide range of error types (missing, duplicates, value errors) and uniquely leverages the distributive properties of the user complaint. Further, the learning-based intervention lets users provide domain expertise that Reptile learns from.In each drill-down iteration, Reptile must train a large number of predictive models. We thus extend factorized learning from count-join queries to aggregation-join queries, and develop a suite of optimizations that leverage the data's hierarchical structure. These optimizations reduce runtimes by >6× compared to a Lapack-based implementation. When applied to real-world Covid-19 and African farmer survey data, Reptile correctly identifies 21/30 (vs 2 using existing explanation approaches) and 20/22 errors. Reptile has been deployed in Ethiopia and Zambia, and used to clean nation-wide farmer survey data; the clean data has been used to design national drought insurance policies.
登录
查看更多内容
DOI:
10.1145/3299869.3300066
发表时间:
2019
期刊:
SIGMOD
影响因子:
--
作者:
Miao, Zhengjie;Zeng, Qitian;Glavic, Boris;Roy, Sudeepa
通讯作者:
Roy, Sudeepa
DOI:
--
发表时间:
1986
期刊:
影响因子:
--
作者:
M. Aitkin;N. Longford
通讯作者:
N. Longford
影响因子:
2.5
作者:
Manas R. Joglekar;H. Garcia;Aditya G. Parameswaran
通讯作者:
Aditya G. Parameswaran
影响因子:
9.9
作者:
J. Sacco;N. Schmitt
通讯作者:
N. Schmitt
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
S. Van de Walle;B. Steijn;S. Jilke
通讯作者:
S. Jilke