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Bjerknes力对微气泡运动特性的影响 被引量:2
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作者 沈壮志 刘文强 《陕西师范大学学报(自然科学版)》 CAS CSCD 北大核心 2013年第2期24-27,81,共5页
以水为工作介质,利用气泡的控制方程,模拟微气泡在驻波声场中运动特性,分析了Bjerknes力对气泡运动轨迹的影响.结果表明:不同声压下,同一位置或相同声压不同位置的气泡所受到的Bjerknes力的系数相差几个数量级,气泡在向声压波腹区域移... 以水为工作介质,利用气泡的控制方程,模拟微气泡在驻波声场中运动特性,分析了Bjerknes力对气泡运动轨迹的影响.结果表明:不同声压下,同一位置或相同声压不同位置的气泡所受到的Bjerknes力的系数相差几个数量级,气泡在向声压波腹区域移动过程中,所受的主Bjerknes力先增大后减小,而次Bjerknes力一直增大,它们的作用使气泡在声轴周围形成一个圆环,声压越大,圆环越大. 展开更多
关键词 声驻波场 Bjerknes力 微气泡群 圆环
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Clustering-driven watershed adaptive segmentation of bubble image 被引量:7
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作者 周开军 阳春华 +1 位作者 桂卫华 许灿辉 《Journal of Central South University》 SCIE EI CAS 2010年第5期1049-1057,共9页
In order to extract froth morphological feature,a bubble image adaptive segmentation method was proposed.Considering the image's low contrast and weak froth edges,froth image was coarsely segmented by using fuzzy ... In order to extract froth morphological feature,a bubble image adaptive segmentation method was proposed.Considering the image's low contrast and weak froth edges,froth image was coarsely segmented by using fuzzy c means(FCM) algorithm. Through the attributes of size and shape pattern spectrum,the optimal morphological structuring element was determined.According to the optimal parameters,some image noises were removed with an improved area opening and closing by reconstruction operation,which consist of image regional markers,and the bubbles were finely separated from each other by watershed transform.The experimental results show that the structural element can be determined adaptively by shape and size pattern spectrum,and the froth image is segmented accurately.Compared with other froth image segmentation method,the proposed method achieves much high accuracy,based on which,the bubble size and shape features are extracted effectively. 展开更多
关键词 FLOTATION froth image adaptive segmentation pattern spectrum morphological feature
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