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以落叶松(Larix gmelinii)叶片、白桦(Betula platyphylla)叶片、落叶松-白桦叶片混合物为例,初步研究了气温和空气相对湿度对地表细小死可燃物平衡含水率和时滞的影响,对这3种可燃物在不同气温、不同空气相对湿度条件下(共20个温湿度组合)失水过程中的含水率进行了测定。通过统计软件建立了相应条件下3种类型可燃物含水率时间动态方程,并利用此方程估算了3种可燃物平衡含水率和时滞,同时用估算值分别建立了3种可燃物的平衡含水率-气温模型、平衡含水率-湿度模型、时滞-气温模型、时滞-湿度模型等4种模型。并用已知的4个可燃物平衡含水率模型拟合了该研究得到的平衡含水率数据,其中,用Van Wanger模型得到的平均绝对误差和均方根误差均不超过0.01,拟合效果最好;Nelson模型的拟合效果最差。对气温和空气相对湿度对3种可燃物平衡含水率和时滞的影响的研究结果表明:气温和空气相对湿度对3种可燃物的平衡含水率和时滞有显著影响,气温与平衡含水率和时滞呈负相关关系,而空气相对湿度与二者均呈正相关关系。其中,时滞-湿度模型高估了可燃物的时滞。该研究具有一定的局限性与不确定性,在未来的工作中,应选择在更宽的可燃物类型范围内,结合更全面的影响因子进行研究。
Taking Larix gmelinii leaves, Betula platyphylla leaves and Larch - Betula platyphylla leaf mixtures as an example, the effects of temperature and air relative humidity on the equilibrium moisture content and time lag of small surface dead combustibles were studied. The moisture content of three kinds of combustibles in the process of water loss under different temperatures and different air relative humidity conditions (a total of 20 temperature and humidity combinations) was determined. Based on the statistical software, the time dynamic equations of water content of three types of combustibles under corresponding conditions were established, and the equilibrium moisture content and time delay of three kinds of combustibles were estimated by using this equation. At the same time, the equilibrium water content Rate-temperature model, equilibrium moisture content-humidity model, time-lapse-temperature model, time-humidity model and other four models. The equilibrium moisture content data obtained from this study were fitted using the known equilibrium moisture content models of four combustible materials. The average absolute error and the root mean square error obtained by the Van Wanger model did not exceed 0.01, and the fitting effect was the best Nelson model has the worst fitting effect. The results of the study on the effects of air temperature and air relative humidity on the equilibrium moisture content and time lag of three kinds of combustibles show that air temperature and air relative humidity have significant effects on the equilibrium moisture content and time lag of three kinds of combustibles. Temperature and equilibrium moisture content And the time lag was negatively correlated, while the air relative humidity and both were positively correlated. Among them, the delay-humidity model overestimates the time lag of combustibles. The study has some limitations and uncertainties. In the future work, we should choose to study it in a wider range of combustibles types with more comprehensive impact factors.