Decision Optimization of Four-Level Supply Chain with the Participation of Two-Echelon Logistics Service Providers under Different Power Structures

<div>The conceptual model of the supply chain involving two-echelon logistics service providers.</div>

Mathematical Problems in Engineering

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Figure 2

Figure 2: Decision Optimization of Four-Level Supply Chain with the Participation of Two-Echelon Logistics Service Providers under Different Power Structures 

Figure 2 | Decision Optimization of Four-Level Supply Chain with the Participation of Two-Echelon Logistics Service Providers under Different Power Structures 