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Mathematical Problems in Engineering
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Mathematical Problems in Engineering
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2019
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Article
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Tab 4
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Research Article
Grey Clustering Evaluation for the Cooperation Efficiency of PPP Project: Taking Beijing Metro Line 4 as an Example
Table 4
Divide qualitative index level.
Grey class
I
II
III
IV
V
Cooperation efficiency level
Very low
Low
Moderate
High
Very high
Score