While for the case of up-down twin tunnels, YAI shows a decreasing trend (from 0.859 to 0.405) as the SPC increases from 0.2 to 1.0.
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While for the case of up-down twin tunnels, YAI shows a decreasing trend (from 0.859 to 0.405) as the SPC increases from 0.2 to 1.0.