Iterative Aggregation of Bayesian Networks Incorporating Prior Knowledge
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Miami University / OhioLINK
2004
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=miami1105563019 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-miami11055630192021-08-03T05:39:28Z Iterative Aggregation of Bayesian Networks Incorporating Prior Knowledge Xu, Jian Computer Science information integration Bayesian networks machine learning Multi-source information integration has gained significant interest recently. We focus on integrating Bayesian networks (BNs) learned from data. The BN batch aggregation algorithm proposed by Maynard-Reid II and Chajewska (MC01) requires all sources’ information be available at aggregation time and does not take the user’s prior knowledge into account. We extend this algorithm to make the aggregation iterative, supporting “anytime” querying, and to allow the incorporation of the user’s structural prior knowledge. We prove that the iterative extensions for joint distribution aggregation are independent of the order in which sources arrive. We show experimentally that iterative BN aggregation is order-dependent due to bias introduced by the algorithm’s optimization nature and an “inertial” effect. However, we show that the results compare well with the batch algorithm in accuracy and efficiency. We also show experimentally that incorporating the user’s structural prior knowledge can improve the accuracy and efficiency. 2004 English text Miami University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=miami1105563019 http://rave.ohiolink.edu/etdc/view?acc_num=miami1105563019 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
| collection |
NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Computer Science information integration Bayesian networks machine learning |
| spellingShingle |
Computer Science information integration Bayesian networks machine learning Xu, Jian Iterative Aggregation of Bayesian Networks Incorporating Prior Knowledge |
| author |
Xu, Jian |
| author_facet |
Xu, Jian |
| author_sort |
Xu, Jian |
| title |
Iterative Aggregation of Bayesian Networks Incorporating Prior Knowledge |
| title_short |
Iterative Aggregation of Bayesian Networks Incorporating Prior Knowledge |
| title_full |
Iterative Aggregation of Bayesian Networks Incorporating Prior Knowledge |
| title_fullStr |
Iterative Aggregation of Bayesian Networks Incorporating Prior Knowledge |
| title_full_unstemmed |
Iterative Aggregation of Bayesian Networks Incorporating Prior Knowledge |
| title_sort |
iterative aggregation of bayesian networks incorporating prior knowledge |
| publisher |
Miami University / OhioLINK |
| publishDate |
2004 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=miami1105563019 |
| work_keys_str_mv |
AT xujian iterativeaggregationofbayesiannetworksincorporatingpriorknowledge |
| _version_ |
1719423142652280832 |