基于GIS与随机森林算法的湖北田歌孕育地理分布区域模型研究

Regional modeling of geographic distribution of field songs breeding in Hubei based on GIS and random forest algorithm

  • 摘要: 对湖北田歌的分布与田歌孕育的地理环境之间的关系进行了探究,以期为区域音乐的实证研究提供新的思路和方法.以湖北田歌为研究对象,选取1 248个田歌样本数据集,运用地理信息系统(geographic information system,GIS)对初步选定的田歌分布及音乐要素影响因子进行建库,基于随机森林及可解释性算法(shapley additive explanations,SHAP)构建田歌影响因子体系分析模型,通过受试者工作特性曲线(receiver operating characteristic curve,ROC)对模型的有效性进行评价,分析田歌的分布、音乐要素与地理环境之间的关系.研究结果表明:1)基于随机森林构建的田歌影响因子体系模型预测效果较好,其曲线下面积(area under the curve,AUC)的值为0.82;2)对田歌产生及音乐要素影响因子重要性排序得出,多年平均降雨量和多年平均气温是孕育湖北田歌的主要因子.其随机森林及SHAP算法,能在一定程度上预测湖北田歌分布格局,对区域音乐文化与地理关联性研究具有重要意义.

     

    Abstract: Relationship between distribution of field songs in Hubei and geographic environment in which the field songs are nurtured is explored in this paper, to provide new ideas and methods for empirical research on regional music. A total of 1248 sample data sets of field songs are selected. Geographic information system (GIS) is used to build a database for distribution of preliminarily selected field songs and influencing factors of the music elements. An analytical model is constructed of the system of influencing factors of the field songs based on random forest and shapley additive explanations (SHAP) interpretable algorithms. Validity of the model is evaluated through the receiver operating characteristic (ROC) curve, to analyze field songs distribution, relationship between music elements and geographic environment, and to analyze relationship between distribution of field songs, music elements and geographic environment. The model of the influence factor system of field songs constructed based on the random forest has a good prediction effect, and its area under the curve (AUC) value is 0.82. Importance ranking of influence factors for generation of field songs and music elements shows that multi-year average rainfall and multi-year average temperature are the main factors for the cultivation of field songs in Hubei. Random Forest and SHAP algorithms can predict distribution patterns of Hubei field to a certain extent, which is of great significance to the study of regional music culture and geographic correlation.

     

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