## 3 Results
### Key Information Mining and Word Cloud Visualization  
#### 3.3.1 Key Information Mining  
To demonstrate the effectiveness of text classification, using classified falling accident texts as an example, this study employed the TF-IDF algorithm to calculate the importance of words. Due to the large number of features, some irrelevant words such as \"personnel\", \"company\", \"operation\", and \"construction site\" were manually removed. Ultimately, the top 20 representative and weighted accident features were extracted, as shown in Table 6.  
Among these keywords, eight common locations leading to falling accidents were identified, namely, \"scaffolding\", \"elevator\", \"roof\", \"exterior wall\", \"hoist\", \"opening\", \"floor\", and \"canopy\". Management personnel need to strengthen protective measures for these key areas to reduce the occurrence of falling accidents. Firstly, regarding scaffolding, management personnel should ensure proper construction that complies with regulations and conduct regular inspections and maintenance. Employees using scaffolding must undergo relevant training to understand correct assembly and usage methods. Additionally, they should be equipped with safety devices such as safety belts and safety nets to provide additional protection. Secondly, for the management of elevators and hoists, regular inspections of equipment performance should be carried out to ensure their  
Figure 6: Overall precision comparison of the four models.  
safety and reliability. Employees must adhere to safety regulations while using elevators, including not overloading or pressing buttons indiscriminately. Emergency stop devices and corresponding escape routes should be in place for emergency evacuation during unexpected situations. Thirdly, for roofs and exterior walls, management personnel should ensure the installation and stability of safety barriers or fences to prevent personnel from accidentally falling. When performing work at heights, employees must wear personal protective equipment such as safety belts and slip-resistant shoes and strictly follow relevant operating procedures. Regular safety training and drills should be conducted to enhance employees' safety awareness and emergency response capabilities. Openings and floors are common hazardous areas for falling accidents. Therefore, management personnel should set up prominent warning signs to remind employees to be cautious and take measures to restrict employees' activities in these areas, such as installing protective railings and safety nets.  
Given the word \"unintentionally\", it can be inferred that many falling accidents occur due to a lack of safety awareness among construction workers, leading to accidents. To prevent such incidents, companies should strengthen safety training, and management personnel must enhance on-site safety supervision. Additionally, setting up warning signs is an important way to cultivate safety awareness among construction workers. Furthermore, falling accidents often occur during activities such as \"demolition\", \"painting\", and \"cleaning\". Therefore, management personnel need to strengthen the supervision of workers during these operations to ensure they properly wear safety equipment and prevent accidents. Accident characterization tables for object strikes, electrocution, collapse of objects, and mechanical injury can be viewed in Appendix A, Tables A1-A4.