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Decomposition of the Sum of Cubes, the Sum Raised to the Power of Four and Codeviance
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作者 Fabio Manca Claudia Marin 《Applied Mathematics》 2020年第10期1013-1020,共8页
The purpose of this paper is to achieve decomposition formulas of sums regarding deviation cubes, the sum of deviation raised to the power of four and codeviance, because they allow to evaluate the contribution of dif... The purpose of this paper is to achieve decomposition formulas of sums regarding deviation cubes, the sum of deviation raised to the power of four and codeviance, because they allow to evaluate the contribution of different components of the above three absolute measures regarding asymmetry, disnormality and concordance. We have obtained more significant formulas that are valid only for two groups, in addition to the formulas valid for <em>r</em> groups, and we have prepared an example to emphasize how useful those formulas were. 展开更多
关键词 Decomposition Formulas Deviation Cubes codeviance Decomposition
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便携式矿井地质探测仪在西曲矿的应用
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作者 王惠亮 《山西焦煤科技》 2006年第6期26-27,共2页
通过实例,介绍了便携式矿井地质探测仪在矿井地质探测中的实际运用情况。
关键词 便携式矿井地质探测仪 弹性波 单道反射共偏移 地质异常体
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