Fig 1.
Schematic diagram of the dense mobile racks.
Table 1.
Brief summary of existing research.
Fig 2.
Dense mobile rack storage system.
Fig 3.
Schematic diagram of the order clustering process.
Fig 4.
Channel movement analysis.
Table 2.
Individual adaptability.
Table 3.
Roulette method to copy individuals.
Fig 5.
Single-point double-bit crossover operation.
Fig 6.
Framework of hybrid genetic algorithm.
Table 4.
Parameter values of examples.
Table 5.
Parameter setting of genetic algorithm.
Fig 7.
The mean value of the objective function under different parameters.
Fig 8.
Algorithm execution time cost under different parameters.
Table 6.
Results of small scale examples.
Table 7.
Results of large scale examples.
Table 8.
Analysis of order picking efficiency in different cases based on HGA algorithm.
Table 9.
Comparison of relative optimization degree of different examples and algorithms.