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船舶推进轴系故障特征信息识取方法比较 被引量:1
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作者 胡贤民 孙潇潇 +1 位作者 温小飞 周瑞平 《船舶工程》 CSCD 北大核心 2019年第5期40-44,共5页
为研究不同船舶推进轴系故障特征量提取方法的优缺点,针对船舶推进轴系故障振动信号的瞬态(脉冲)和周期性2个特点,介绍快速傅里叶变换(FFT)、EAF和EEAF3种周期故障特征信息识取方法,并在实船试验中就这3种方法的适用性、准确性和复杂程... 为研究不同船舶推进轴系故障特征量提取方法的优缺点,针对船舶推进轴系故障振动信号的瞬态(脉冲)和周期性2个特点,介绍快速傅里叶变换(FFT)、EAF和EEAF3种周期故障特征信息识取方法,并在实船试验中就这3种方法的适用性、准确性和复杂程度等进行比较分析。结果表明:EEAF相比FFT和EAF,能快速、准确地提取船舶推进轴系周期性故障信息的特征频率及其振幅,具有良好的稳定性,可专门用于船舶推进轴系故障分析和诊断。 展开更多
关键词 船舶推进轴系 故障特征 信息识取 方法对比
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An easy-to-use evaluation framework for benchmarking entity recognition and disambiguation systems 被引量:1
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作者 Hui CHEN Bao-gang WEI +2 位作者 Yi-ming LI Yong-huai LIU Wen-hao ZHU 《Frontiers of Information Technology & Electronic Engineering》 SCIE EI CSCD 2017年第2期195-205,共11页
Entity recognition and disambiguation (ERD) is a crucial technique for knowledge base population and information extraction. In recent years, numerous papers have been published on this subject, and various ERD syst... Entity recognition and disambiguation (ERD) is a crucial technique for knowledge base population and information extraction. In recent years, numerous papers have been published on this subject, and various ERD systems have been developed. However, there are still some confusions over the ERD field for a fair and complete comparison of these systems. Therefore, it is of emerging interest to develop a unified evaluation framework. In this paper, we present an easy-to-use evaluation framework (EUEF), which aims at facilitating the evaluation process and giving a fair comparison of ERD systems. EUEF is well designed and released to the public as an open source, and thus could be easily extended with novel ERD systems, datasets, and evaluation metrics. It is easy to discover the advantages and disadvantages of a specific ERD system and its components based on EUEF. We perform a comparison of several popular and publicly available ERD systems by using EUEF, and draw some interesting conclusions after a detailed analysis. 展开更多
关键词 Entity recognition and disambiguation (ERD) Evaluation framework Information extraction
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