基于CNN-BiLSTM-Attetion的銀杏液流預測模型及環境因子影響研究
電子技術應用
李波,武斌
浙江農林大學 數學與計算機科學學院
摘要: 樹木液流受生理活動和多重環境因子的共同作用,表現為非線性和隨機性特征,為預測模型的精確度帶來挑戰。對此,結合CNN卷積層、BiLSTM雙向網絡結構和注意力機制的優勢分別對樹干液流序列的局部特征、長期依賴和關鍵信息進行提取,并根據自測銀杏液流數據集構建基于CNN-BiLSTM-Attetion的樹干液流預測模型。該模型的R2、MSE和MAE分別為0.977 3、0.002 9和0.013 4,相較于CNN、BiLSTM、XGBoost、RNN和TCN建立的模型均有不同程度的提高。另外,還利用特征工程對環境因子的重要性進行排名,分析銀杏樹干液流在生長季初期對環境因子的響應規律,對銀杏生長季初期的灌溉和養護提供理論依據。
中圖分類號:TP391 文獻標志碼:A DOI: 10.16157/j.issn.0258-7998.245138
中文引用格式: 李波,武斌. 基于CNN-BiLSTM-Attetion的銀杏液流預測模型及環境因子影響研究[J]. 電子技術應用,2024,50(9):101-105.
英文引用格式: Li Bo,Wu Bin. Research of ginkgo sap flow prediction model based on CNN-BiLSTM-Attetion and the impact of environmental factors[J]. Application of Electronic Technique,2024,50(9):101-105.
中文引用格式: 李波,武斌. 基于CNN-BiLSTM-Attetion的銀杏液流預測模型及環境因子影響研究[J]. 電子技術應用,2024,50(9):101-105.
英文引用格式: Li Bo,Wu Bin. Research of ginkgo sap flow prediction model based on CNN-BiLSTM-Attetion and the impact of environmental factors[J]. Application of Electronic Technique,2024,50(9):101-105.
Research of ginkgo sap flow prediction model based on CNN-BiLSTM-Attetion and the impact of environmental factors
Li Bo,Wu Bin
College of Mathematics and Computer Science, Zhejiang Agriculture and Forestry University
Abstract: Sap flow is subject to the combined effects of physiological activities and multiple environmental factors, and exhibits nonlinear and stochastic characteristics, which poses a challenge to the accuracy of prediction models. In this regard, the advantages of CNN convolutional layer, BiLSTM bidirectional network structure and attention mechanism are combined to extract the local features, long-term dependence and key information of sap flow sequences, respectively, and the CNN-BiLSTM-Attetion sap flow prediction model is constructed according to the self-test ginkgo sap flow data set. The model has the R2, MSE, and MAE of 0.977 3, 0.002 9, and 0.013 4, respectively, which are all improved in varying degrees compared with the CNN, BiLSTM, XGBoost, RNN and TCN. In addition, feature engineering is also used to rank the importance of environmental factors and analyze the response regularity of ginkgo sap flow to environmental factors at the beginning of the growing season, which provides a theoretical basis for irrigation and maintenance of ginkgo at the beginning of the growing season.
Key words : sap flow prediction model;CNN-BiLSTM-Attetion;environmental factors;early growing season
引言
森林是地球生態系統不可或缺的一部分,由各種樹種組成的森林系統約占地球陸地總面積的1/3[1],樹木的蒸騰作用在環境變化中起著至關重要的作用。所以,準確預測樹木蒸騰量對地球水文平衡和制定氣候變化下的可持續發展戰略具有重要意義[2-3]。樹干液流是樹木生長和生理活動的重要條件之一,反映了樹木的水分和養分運輸狀況。通過監測樹干液流的速率和方向[4],可以了解樹木的需水和耗水特性,進而評估樹木的水分利用效率和養分供應情況[5]。因此對樹干液流的準確預測變得十分重要。
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作者信息:
李波,武斌
(浙江農林大學 數學與計算機科學學院,浙江 杭州 311300)
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