QDI：质量分布指数

“质量分布指数”（Quality Distribution Index，简称QDI）是用于衡量质量分布情况的量化指标。为了书写和使用的便捷，通常缩写为QDI。该术语广泛应用于综合领域，特别是在未分类的相关场景中，作为一个通用的评价依据。

By comparing the fractal dimensions calculated above with the corresponding rock mass grades classified by the standard for engineering rock mass rating, a scheme of rock mass quality classification, which takes the fractal dimension of the discontinuity distribution as the classifying index, is proposed.
将计算所得的岩体结构面分布的分维数与按工程岩体分级标准对相应岩体分级所得的岩体质量等级进行对比，提出了一个以岩体结构面分布的分形维作为分级指标的岩体质量评价方案。
According to the relationship of the fractal dimension and engineering rock mass grade, a rock mass quality classification is presented, which takes the fractal dimension of discontinuity distribution as the classifying index.
根据岩体结构面分布的分维数与工程岩体分级结果的对应关系，提出了一个用岩体结构面分布的分维数作为分级指标的岩体质量评价方案。
This paper puts forward a quality control statistic method, the control chart, which is based on the principles of random variable distribution and partial distribution of quality indexes, and the theory of control chart, specially used in the control process of unilateral quality index production.
本文探讨的控制图依据单侧规范产品的质量指标随机变量分布的规律及偏斜分布的原理，并与控制图的理论相结合，提出了一种新的质量控制的统计方法。

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