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To deeply analyze the information transmission characteristics of large-scale sports events organizations，the effects of various organizations during the information transmission process were analyzed taking "5·22" cross-country race accident in Gansu Baiyin as an example. Firstly，an event organization information transmission model was proposed based on STAMP model. Moreover，the transmission process was divided into four stages: preparation，incident occurrence，emergency response，and post-incident handling，and analyzed from three levels: individual，enterprise，and government. Then，CN theory was used to develop an organizational information transmission network structure and identify key information nodes and paths. Finally，the entropy weight method was used to propose the information edge weight calculation model. The results indicated that the key information nodes were mainly concentrated at the individual and government levels，especially in the preparation stage when the information load of transmission paths was relatively high. However，enterprises showed insufficient responsibility at this stage，particularly in the acquisition and transmission of weather information，leading to impaired decision-making and actions at critical moments.
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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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