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It is difficult to solve the problem of exterior quality control of PVC bubbles in doors and covers in the production process. To eliminate the drawbacks in PVC bubble quality by empirical qualitative management, a free sliding wooden plug closed space model for PVC bubbles generation was constructed, and combined with the Ideal Gas Law, the quantitative formula for characterizing the quality state of PVC bubbles was attained, and the formation mechanism of PVC bubbles was analyzed from the perspective of mathematical models. Based on mathematical model and quantitative characterization formulas, the impact of factors including original cavity volume of the sheet metal fold, the highest temperature of PVC drying room, PVC materials, and other environmental factors on the positive or negative correlation and degree of influence of PVC bubbles can be objectively reflected, thereby the direction of quality control of PVC bubbles is more explicit from design and process.
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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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