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关于烟气测试中尘粒采样方法的探讨
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作者 徐沛 王平强 《黑龙江环境通报》 2003年第3期58-59,共2页
在烟气测试中 ,采样方法的不同 ,影响着尘粒排放浓度的计算结果。本文针对分点采样和移动采样方法的选择进行探讨。
关键词 烟气测试 采样方法 尘粒排放浓度 分点采样 移动采样方法
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A level set based segmentation approach for point-sampled surfaces 被引量:4
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作者 MIAO Yong-wei FENG Jie-qing +1 位作者 ZHENG Guo-xian PENG Qun-sheng 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2007年第4期575-585,共11页
Segmenting a complex 3D surface model into some visually meaningful sub-parts is one of the fundamental problems in digital geometry processing. In this paper, a novel segmentation approach of point-sampled surfaces i... Segmenting a complex 3D surface model into some visually meaningful sub-parts is one of the fundamental problems in digital geometry processing. In this paper, a novel segmentation approach of point-sampled surfaces is proposed, which is based on the level set evolution scheme. To segment the model so as to align the patch boundaries with high curvature zones, the driven speed function for the zero level set inside narrow band is defined by the extended curvature field, which approaches zero speed as the propagating front approaches high curvature zone. The effectiveness of the proposed approach is demonstrated by our ex- perimental results. Furthermore, two applications of model segmentation are illustrated, such as piecewise parameterization and local editing for point-sampled geometry. 展开更多
关键词 Point-samoled surfaces SEGMENTATION Level set method Extended curvature field
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