## 4 Experiment and Discussion  
### Experimental Setup  
The dataset in this study was obtained by field research in the laboratory. The sampling location was in Zhangjiagang City, which is located between latitudes 31\({}^{\circ}\)43\({}^{\prime}\)12\({}^{\prime\prime}\)-32\({}^{\circ}\)02\({}^{\prime}\) and longitudes 120\({}^{\circ}\)21\({}^{\prime}\)57\({}^{\prime\prime}\)-120\({}^{\circ}\)52\({}^{\prime}\), and the southern part has a tropical wet climate. All subjects lived in Zhangjiagang City for one year or more and were fully adapted to the local climatic conditions. The subjects were divided into two groups for data collection in April 2020 and April 2021. The basic information of the subjects, including sampling conditions, physical environment, physiological parameters, subjective perception, and self-assessment were measured and analyzed statistically. The numbers of subjects in the two groups were 48 and 109. Experimental procedure  
The subjects received 30 min of training before participating in the experiment to ensure that they were aware of how to perform physiological measurements. They were also required to complete an experiment for approximately 160 min (30 min in the preparation room, 60 min of sampling time in the first stage, 10 min of rest, and 60 min of sampling time in the second stage). The experimental process was as follows. First, each subject received the sampling information form in the preparation room; the basic information was completed, and sampling conditions were collected. After sitting still for approximately 30 min, the subject entered experimental chamber 1 (stage 1). To adapt to this indoor environment, the physiological parameters of the subjects and the physical parameters of the indoor environment were simultaneously recorded by the staff; then, the subjects completed the subjective perception and self-assessment evaluation forms. The staff reviewed this information to ensure correctness. Next, subjects left experimental chamber 1 for 10 min, during which time the staff thoroughly ventilated and cleaned this chamber. Then, the subject entered experimental chamber 2 (stage 2). For minutes 100-130, reading or online status was resumed; after minutes 130-160, the staff again recorded physiological parameters, physical environment parameters, subjective perception, and self-assessment evaluation forms. Once the tests in the two stages were completed and the inspection was correct, the staff left the sampling room. To exclude the effect of the experimental sequence on the feeling of comfort, the experimental cabins using material 1 and material 2 were divided into Groups A and B for simultaneous experiments, respectively. Figure 5 shows the experimental process. Characteristics and labels  
According to [23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36], individual thermal comfort models constructed in the past mostly collected information from indoor and outdoor physical environments and human body responses as features information. The number of subjects surveyed was usually limited, ranging from one to a few in these models because of the difficulties in recruiting subjects, the long sampling period, etc. The limitation related to an insufficient number  
Figure 5: Experimental flow diagram. of surveyed subjects in previous models was overcome in this study by surveying a larger number of subjects, and a comprehensive classification of the characteristics that affect individual thermal comfort was conducted to obtain a more comprehensive data sample. The selected features included six categories (i.e., basic information, sampling conditions, physiological parameters, physical environment, environmental perception, and self-assessment), which are summarized in Table 1.  
Since the thermal sensation vote (TSV) is currently the most widely accepted standard in comfort studies, the thermal sensation of an individual is evaluated based on the ASHRAE scale.