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数据驱动的自动化机器学习流程生成方法 被引量:2
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作者 陈高建 王菁 +2 位作者 栗倩文 袁云静 曹嘉琛 《广西师范大学学报(自然科学版)》 CAS 北大核心 2022年第3期185-193,共9页
自动化机器学习是机器学习前沿的一个重要问题,自动化机器学习工具根据数据集及任务需求组合机器学习算子来构造流程,使领域用户在不具备专业机器学习知识的情况下也能完成相应数据分析工作,但目前的自动化机器学习工具普遍存在耗时长... 自动化机器学习是机器学习前沿的一个重要问题,自动化机器学习工具根据数据集及任务需求组合机器学习算子来构造流程,使领域用户在不具备专业机器学习知识的情况下也能完成相应数据分析工作,但目前的自动化机器学习工具普遍存在耗时长和精度低的问题。本文基于数据集相似性和强化学习原理,提出一种数据驱动的自动化机器学习流程的生成方法,利用相似数据集的历史知识,将神经网络与MCTS相结合,指导机器学习流程的生成。实验结果表明:该方法在耗时方面缩短至分钟级别,流程性能也得到提升。 展开更多
关键词 AutoML 数据集相似性 MCTS 强化学习
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Similarity measure design for high dimensional data 被引量:3
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作者 LEE Sang-hyuk YAN Sun +1 位作者 JEONG Yoon-su SHIN Seung-soo 《Journal of Central South University》 SCIE EI CAS 2014年第9期3534-3540,共7页
Information analysis of high dimensional data was carried out through similarity measure application. High dimensional data were considered as the a typical structure. Additionally, overlapped and non-overlapped data ... Information analysis of high dimensional data was carried out through similarity measure application. High dimensional data were considered as the a typical structure. Additionally, overlapped and non-overlapped data were introduced, and similarity measure analysis was also illustrated and compared with conventional similarity measure. As a result, overlapped data comparison was possible to present similarity with conventional similarity measure. Non-overlapped data similarity analysis provided the clue to solve the similarity of high dimensional data. Considering high dimensional data analysis was designed with consideration of neighborhoods information. Conservative and strict solutions were proposed. Proposed similarity measure was applied to express financial fraud among multi dimensional datasets. In illustrative example, financial fraud similarity with respect to age, gender, qualification and job was presented. And with the proposed similarity measure, high dimensional personal data were calculated to evaluate how similar to the financial fraud. Calculation results show that the actual fraud has rather high similarity measure compared to the average, from minimal 0.0609 to maximal 0.1667. 展开更多
关键词 high dimensional data similarity measure DIFFERENCE neighborhood information financial fraud
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