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In the context of real-world driving environments，due to the perturbation of perception data and the unpredictable behavior of other traffic participants，rational decision-making in highly interactive and intricate driving scenarios considering the impact of uncertainty factors is one of the main concerns that decision-making and planning systems for autonomous vehicles must address. A behavioral decision-making method for autonomous vehicles navigating in uncertain environments is proposed in this paper. To mitigate the impact of uncertainty，the behavioral decision-making process is transformed into a partially observable Markov decision process （POMDP）. Furthermore，to tackle the computational complexity of the POMDP model，the complex network theory is applied for the first time for dynamically modeling the microscopic driving environment surrounding the autonomous vehicle，which allows for the effective characterization of interaction relationship between vehicle nodes and the scientific selection of significant vehicle nodes，guiding the autonomous vehicle's decision-making process，enabling precise identification of critical vehicle nodes，and pruning the decision space. The effectiveness of the proposed method is verified in a simulation environment，and the experimental results show that the proposed method has higher computational efficiency，superior performance，and enhanced flexibility in comparison to existing state-of-the-art behavioral decision-making methods.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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