A variable weight combination prediction model for climate in a greenhouse based on BiGRU-Attention and LightGBM

文献类型： 外文期刊

第一作者： Mao, Xiaojuan

作者： Mao, Xiaojuan;Ren, Ni;Dai, Peiyu;Jin, Jing;Wang, Baojia;Kang, Rui;Li, Decui;Ren, Ni

作者机构：

关键词： Greenhouse; Climate; Bi-directional Gated Recurrent Unit; Attention; LightGBM

期刊名称：COMPUTERS AND ELECTRONICS IN AGRICULTURE （ 影响因子：8.3； 五年影响因子：8.3 ）

ISSN： 0168-1699

年卷期： 2024 年 219 卷

页码：

收录情况： SCI

摘要： Accurate prediction of environmental changes in a greenhouse is crucial for precise control and promoting crop growth. However, the microclimate environment in a greenhouse is nonlinear, temporal, multivariate, and strongly coupled, making it difficult to establish a robust fitting model. To address these issues, this study proposed a variable weight combination prediction model based on attention mechanism optimized Bidirectional Gated Recurrent Unit (BiGRU-Attention) and Light Gradient Boosting Machine (LightGBM). The Particle Swarm Optimization Algorithm (PSO) was employed to optimize the weight coefficients of the predicted values from BiGRU-Attention and LightGBM models at different times. This optimization aimed to enhance the accuracy of predicting air temperature, air humidity, and Photosynthetically Active Radiation (PAR) in a greenhouse. In predictions spanning time steps from 30 to 120 min, the variable weight combination prediction model demonstrated superior performance compared to single models and equal weight combination model BiGRU-Attention-LightGBM. At the time step of 120 min, the coefficient of determination R2 for air temperature was 0.9586, air humidity was 0.9232, and PAR was 0.8066. This indicated that the variable weight combination model (PSO-BiGRU-Attention-LightGBM) could more accurately predict the future dynamic trends of climatic environment factors in a greenhouse.

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