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一种高分辨率高信噪比处理技术 被引量:1
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作者 邵幼英 《石油地球物理勘探》 EI CSCD 北大核心 1990年第2期168-176,190+244,共11页
本文提出了一种新的高分辨率、高信噪比的处理方法。它可以在不受时窗的影响下,在同一程序里完成时空域内自动检测有效地震信号,并对检测出的高信噪比地震信号,使用大波峰、波谷位置的谱移展法来提高其分辨率。经本方法处理后,信噪比可... 本文提出了一种新的高分辨率、高信噪比的处理方法。它可以在不受时窗的影响下,在同一程序里完成时空域内自动检测有效地震信号,并对检测出的高信噪比地震信号,使用大波峰、波谷位置的谱移展法来提高其分辨率。经本方法处理后,信噪比可提高为原来的■倍(n为调向叠加道数),分辨率提高为原来的0.85(K-1)倍(K为分辨率控制系数)。该方法对理论记录和不同地区实际资料的处理取得了明显的效果,并且特别适用于低信噪比地区的薄层油气藏勘探。 展开更多
关键词 地震高分辨率高信噪比处理 信号自动检测 谱移展法
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Automatic detection of respiratory rate from electrocardiogram,respiration induced plethysmography and 3D acceleration signals 被引量:3
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作者 刘官正 吴丹 +2 位作者 梅占勇 朱青松 王磊 《Journal of Central South University》 SCIE EI CAS 2013年第9期2423-2431,共9页
Respiratory monitoring is increasingly used in clinical and healthcare practices to diagnose chronic cardio-pulmonary functional diseases during various routine activities.Wearable medical devices have realized the po... Respiratory monitoring is increasingly used in clinical and healthcare practices to diagnose chronic cardio-pulmonary functional diseases during various routine activities.Wearable medical devices have realized the possibilities of ubiquitous respiratory monitoring,however,relatively little attention is paid to accuracy and reliability.In previous study,a wearable respiration biofeedback system was designed.In this work,three kinds of signals were mixed to extract respiratory rate,i.e.,respiration inductive plethysmography(RIP),3D-acceleration and ECG.In-situ experiments with twelve subjects indicate that the method significantly improves the accuracy and reliability over a dynamic range of respiration rate.It is possible to derive respiration rate from three signals within mean absolute percentage error 4.37%of a reference gold standard.Similarly studies derive respiratory rate from single-lead ECG within mean absolute percentage error 17%of a reference gold standard. 展开更多
关键词 respiration inductive plethysmography respiratory rate ELECTROCARDIOGRAM 3D acceleration activity
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