Journal of the Operational Research Society

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Raw material inventory solution in iron and steel industry using Lagrangian relaxation

L Tang, G Liu and J Liu

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Figure 1 - Unfortunately we are unable to provide accessible alternative text for this. If you require assistance to access this image, please contact help@nature.com or the author

Figure 1.

The institution of the replenishment plan for raw materials.

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Figure 2.

Schematic diagram of the comprehensive stock yard.

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Figure 3.

Schematic diagram of stock yard phase I and II.

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Figure 4.

Schematic diagram of stock yard phase III.

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Figure 5.

Inventory level of material i as a function of time.

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Figure 6.

Plot of y as a strictly convex function of t at a 1=100, a 2=70 and b 2=29.

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Table 1 - Features of the raw material inventory problem in Baosteel - Unfortunately we are unable to provide accessible alternative text for this. If you require assistance to access this image, please contact help@nature.com or the author

Table 1 - Features of the raw material inventory problem in Baosteel.

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Table 2 - Average duality gap (%) of our method - Unfortunately we are unable to provide accessible alternative text for this. If you require assistance to access this image, please contact help@nature.com or the author

Table 2 - Average duality gap (%) of our method.

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Table 3 - Average running time (s) of our method - Unfortunately we are unable to provide accessible alternative text for this. If you require assistance to access this image, please contact help@nature.com or the author

Table 3 - Average running time (s) of our method.

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