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应用神经网络RBF估算青海省东南沙区土壤蒸发

, PP. 400-404

Keywords: 神经网络,土壤蒸发,微型蒸发器,青藏高原

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Abstract:

蒸发是地表能量平衡和水分平衡的重要组成部分。2006-2009年在青海东南部沙区半固定沙丘,利用微型蒸发器(MLS)对土壤蒸发进行了测定,结合气象观测数据,利用RBF神经网络技术,建立了沙区半固定沙丘土壤蒸发模型,并应用多元回归技术进行了验证。结果表明已经构建的RBF神经网络计算土壤蒸发与实测值吻合较好,均方差是0.14mm,其绝对误差和均方差均小于多元线性回归计算值。模型在确定沙区土壤蒸发中具有实用可靠的优势。

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