Multivariate analysis identified association of comorbidity ( p = 0 . 006 ) , coagulopathy ( p < 0 . 001 ) , and conservative treatment ( p = 0 . 005 ) associated with higher mortality 多变量统计分析结发现与高死亡率有关的因子包括严重共病,凝血异常及保守性治疗。
4 . the application of mspc in continuous process and batch process is introduced , basing on the processes of synthesizing of phosphonic acid dimethyl and batch cooling crystallizer 4 、分别以农药原料亚磷酸二甲酯生产过程和间歇冷凝结晶生产过程为应用背景,介绍了多变量统计过程控制在连续过程和间歇过程中的应用。
In company with the advance of automation level and the increase of computer memory capacity in working site , the collection and storage of process data lay foundation for mspc 随着生产过程系统自动化程度的提高和工业现场计算机设备存储容量的增加,采集和存储大量过程变量和产品质量数据已为多变量统计控制的应用奠定了基础。
2 . several mathematical tools used in mspc are introduced , including principal component analysis ( pca ) and multi - way principal component analysis ( mpca ) , principal component recursion ( pcr ) , partial least square ( pls ) 2 、介绍了几种用于多变量统计过程控制的数学工具,包括主元分析及多向主元分析、主元回归、部分最小二乘等方法。
3 . single - variable spc and its disadvantages are pointed out , then some statistical variables and techniques of mspc are emphasized . multi - dimension data processing is transformed to the analysis of a single statistical variable by defining different statistical variables 3 、介绍了单变量统计过程控制方法及其所固有的局限性,概述和总结了多变量统计过程控制中的主要统计量和基本分析处理方法,为对实际生产过程的监控提供了方向。