准确的光伏功率预测结果对于电网的调度优化具有重要意义,针对现有预测方法仅侧重于时域或频域特征,导致未能充分提取光伏数据中时频域信息。提出一种融合时频特征的光伏功率预测模型时域与频域注意力特征融合(time-domain and frequenc...准确的光伏功率预测结果对于电网的调度优化具有重要意义,针对现有预测方法仅侧重于时域或频域特征,导致未能充分提取光伏数据中时频域信息。提出一种融合时频特征的光伏功率预测模型时域与频域注意力特征融合(time-domain and frequency-domain attentional feature fusion,TDFDAFF),旨在更全面地捕捉光伏序列数据的复杂特性。首先,对原始的光伏序列数据进行特征相关性分析,选取与光伏发电功率强相关的气象因素作为输入特征,并将筛选后的特征数据采用滑动窗口技术进行分割,构建输入特征矩阵。随后分别输入到时序特征提取模块、频率特征提取模块来提取光伏序列数据中的时频特征。最后,采用注意力特征融合模块对两部分提取到的时频特征进行融合,为每个特征动态的赋予不同的权重,从而强调对重要特征的关注,将融合后的特征通过全连接层进行映射得到最终的预测输出。通过在两个地区的光伏数据集上进行验证,TDFDAFF模型相较于其他预测模型有着更好的预测精度。展开更多
Pear anthracnose,caused by Colletotrichum fructicola,is a devastating disease that seriously affects most pear varieties,compromising their yield and quality.However,effective control of this pathogen is lacking.Moreo...Pear anthracnose,caused by Colletotrichum fructicola,is a devastating disease that seriously affects most pear varieties,compromising their yield and quality.However,effective control of this pathogen is lacking.Moreover,the critical resistance responses to C.fructicola in pear are unknown.To investigate these resistance mechanisms of pear against C.fructicola,transcriptomic and metabolomic analyses were performed on the anthracnose-resistant variety‘Seli’and susceptible variety‘Cuiguan’after C.fructicola infection.Differentially expressed genes(DEGs)and differentially accumulated metabolites(DAMs)were mainly involved in metabolism and secondary metabolite synthetic pathways,includingα-linoleic acid metabolism,phenylalanine biosynthesis metabolism,unsaturated fatty acids biosynthesis,and biosynthesis of amino acids and their derivatives.In particular,the accumulation of unsaturated fatty acids(UFAs),amino acids,and their derivatives,such as linoleic acid and its derivatives,lauric acid,N-acetyl-L-glutamic acid,and L-proline,was significantly increased in‘Seli’after infection,while the amino acids of oxiglutatione and N-acetyl-L-glutamic acid,as well as the proanthocyanidins,were significantly decreased in‘Cuiguan’.These findings suggest that these metabolites may contribute to the differential anthracnose resistance between‘Seli’and‘Cuiguan’.Overall,our results provid new insights into the regulation of pear anthracnose resistance,which may assist in developing new control strategies and breeding anthracnose-resistant varieties.展开更多
基金supported by the China Agriculture Research System(CARS-28-14)the National Natural Science Foundation of China(32302484)the University Natural Science Research Project of Anhui Province,China(2022AHO50926 and 2022AH040129).
文摘Pear anthracnose,caused by Colletotrichum fructicola,is a devastating disease that seriously affects most pear varieties,compromising their yield and quality.However,effective control of this pathogen is lacking.Moreover,the critical resistance responses to C.fructicola in pear are unknown.To investigate these resistance mechanisms of pear against C.fructicola,transcriptomic and metabolomic analyses were performed on the anthracnose-resistant variety‘Seli’and susceptible variety‘Cuiguan’after C.fructicola infection.Differentially expressed genes(DEGs)and differentially accumulated metabolites(DAMs)were mainly involved in metabolism and secondary metabolite synthetic pathways,includingα-linoleic acid metabolism,phenylalanine biosynthesis metabolism,unsaturated fatty acids biosynthesis,and biosynthesis of amino acids and their derivatives.In particular,the accumulation of unsaturated fatty acids(UFAs),amino acids,and their derivatives,such as linoleic acid and its derivatives,lauric acid,N-acetyl-L-glutamic acid,and L-proline,was significantly increased in‘Seli’after infection,while the amino acids of oxiglutatione and N-acetyl-L-glutamic acid,as well as the proanthocyanidins,were significantly decreased in‘Cuiguan’.These findings suggest that these metabolites may contribute to the differential anthracnose resistance between‘Seli’and‘Cuiguan’.Overall,our results provid new insights into the regulation of pear anthracnose resistance,which may assist in developing new control strategies and breeding anthracnose-resistant varieties.
