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浅谈两位数一口清的算法及其实用价值
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作者 石子峰 《内蒙古财会》 2000年第A01期46-47,共2页
两位数的一口清是指两位数乘多位数的积数稍加思索脱口说出得数。这种算法的脑算规律必须抓住以下三个环节:、以一位数一口清为基础;二、以定身乘法、分解因数法、补数乘法、变式乘法和外移法逐位清为主要方法;三、以公式定位和弃9... 两位数的一口清是指两位数乘多位数的积数稍加思索脱口说出得数。这种算法的脑算规律必须抓住以下三个环节:、以一位数一口清为基础;二、以定身乘法、分解因数法、补数乘法、变式乘法和外移法逐位清为主要方法;三、以公式定位和弃9验证法配合运算。 展开更多
关键词 实用价值 脑算方法 拨珠次数 “两位数一口清” 乘法运 方法
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A method for brain 3D surface reconstruction from MR images 被引量:2
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作者 赵德新 《Optoelectronics Letters》 EI 2014年第5期383-386,共4页
Due to the encephalic tissues are highly irregular, three-dimensional (3D) modeling of brain always leads to compli- cated computing. In this paper, we explore an efficient method for brain surface reconstruction fr... Due to the encephalic tissues are highly irregular, three-dimensional (3D) modeling of brain always leads to compli- cated computing. In this paper, we explore an efficient method for brain surface reconstruction from magnetic reso- nance (MR) images of head, which is helpful to surgery planning and tumor localization. A heuristic algorithm is pro- posed foi" surface triangle mesh generation with preserved features, and the diagonal length is regarded as the heuristic information to optimize the shape of triangle. The experimental results show that our approach not only reduces the computational complexity, but also completes 3D visualization with good quality. 展开更多
关键词 Heuristic algorithms Magnetic resonance imaging Mesh generation Surface reconstruction Three dimensional computer graphics
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