作者bluetear2008 (bluetear2008)
看板ChemEng
标题[问题] 两题程控
时间Tue Jan 13 22:53:27 2009
1.an analyzer measures the pH of a process stream every 15 minutes.
During normal process operation, the mean and standard deviation for the pH
measurement are x=5.75 and s=0.05, respectively. When the process is
operating normally, what is the probability that a pH measurement will
exceed 5.9?
2.Develop a CUSUM chart for the thickness data of Example 1. using K=0
and H=4. How many chart violations occur? Repeat for an EWMA chart and a
value of λ=0.25
我们用的课本没有这部份
老师上课的投影片也看不太懂
请各位大大帮帮忙
谢谢你们
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