# One-Class SVM Model-Based Tunnel Personnel Safety Detection Technology
## 4 Dataset Preparation  
### Data Description  
As the operating environment in the tunnel is relatively closed and the site environment is complex, the temperature and humidity of the construction personnel in the cave at different locations and at different times are analyzed to screen suitable feature data for the subsequent construction of the OCSVM-based personnel safety state identification model to achieve the effect of safety warning. 1. In the actual operation process, if there are symptoms such as fatigue, weakness and fuzzy consciousness, it will pose a threat to the safety of construction personnel. Body temperature and heart rate can directly respond to these physical signs. Body temperature of all personnel entering the construction site should be tested for strict prevention and control of epidemics. Personnel with a body temperature \(\geqq\) 37.3 \({}^{\circ}\)C should be sent to the isolation observation quarters in a timely manner for further isolation and observation. Because the heart rate parameters are very sensitive to temperature changes, it is easy to measure and calculate, and the measurement of consumption is less time-consuming. The normal heart rate of adults is 60-100 times/minute. During operation in a closed space, if the heart rate of the staff exceeds the normal value range, the work needs to be stopped immediately to prevent the staff's body and function from becoming impaired, thus causing serious work accidents. 2. The factors affecting temperature and humidity inside the cave are very complex, and include mechanical ventilation, natural air, groundwater, temperature and humidity outside the tunnel (which may vary daily and seasonally), heat released from construction machinery, geothermal heat, air pressure, wind direction and wind speed changes [23]. Temperature and humidity can respond not only to the operating conditions of the engineering and construction personnel, but also to the safety of the tunnel structure. * When the humidity inside the cave is too high, the air contains more water vapor, the sweat discharged by the human body does not easily evaporate and the body does not dissipate heat smoothly, resulting in an increase in body temperature. When the temperature inside the cave decreases to a certain range, it will directly affect the physiological and mental state of the human body. * The low-temperature situation will make the human immune system decline and cause a series of diseases, such as colds, asthma, etc. The effect of a high humidity environment makes the friction between the sweat and clothing in our body increase. High temperature and humidity have a negative impact on the operators in the tunnel, affecting the efficiency of work, possibly even endangering life and also increasing the incidence of safety accidents [24]. \begin{table}
\begin{tabular}{l l} \hline \hline
**Steps** & **Measures** \\ \hline \multirow{3}{*}{1} & Staff information data were introduced as training variables in the test set \(Z_{0}\in\mathrm{R}^{\mathrm{M\times L}}\). \\  & The test set data were processed using the same mapping rules as those normalized for the training set [22] \\ \multirow{3}{*}{2} & The standardized test set \(Z\in\mathrm{R}^{\mathrm{M\times L}}\) is processed using the established OCSVM model \\  & Personnel safety abnormality prediction and alarms are based on the obtained \\ \multirow{3}{*}{3} & measured data decision function \(\mathrm{F}(z_{\mathrm{k}})\) \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Personnel safety status testing. 3. During the tunnel construction process, the relative positions of the construction personnel have an important impact on the safety of personnel, as different construction positions may produce different degrees of danger and different search and rescue difficulties.