黄金科学技术 ›› 2020, Vol. 28 ›› Issue (6): 902-909.doi: 10.11872/j.issn.1005-2518.2020.06.007
摘要:
生态环境质量诊断和安全评价是保障矿区经济高质量发展的重要组成部分。针对当前矿区生态安全评价方法精度不高的问题,从生态环境质量、污染物排放、生态保护、环境承载力和系统协调5个方面构建评价指标体系。通过核函数选择,构造广义最优分类超平面,将小波理论和支持向量机方法有机结合,建立联合评价模型,并运用于G稀土矿区进行实例验证。结果表明:该稀土矿区Ⅰ级风险区域(即环境差区)有10个,Ⅱ级风险区域(即环境较差区)为8个。与GIS识别结果比较,模型的误差率为5%,说明模型具有较好的预警精度。模型整体预测性能较优,在非线性时间序列领域具有很好的表现和应用前景。
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