Soil salinization is a major abiotic stress that hampers plant development and significantly reduces agricultural productivity,posing a serious challenge to global food security.Akebia trifoliata(Thunb.)Koidz,a specie...Soil salinization is a major abiotic stress that hampers plant development and significantly reduces agricultural productivity,posing a serious challenge to global food security.Akebia trifoliata(Thunb.)Koidz,a species within the genus Akebia Decne.,is valued for its use in food,traditionalmedicine,oil production,and as an ornamental plant.Curcumin,widely recognized for its pharmacological properties including anti-cancer,anti-neuroinflammatory,and anti-fibrotic effects,has recently drawn interest for its potential roles in plant stress responses.However,its impact on plant tolerance to saline-alkali stress remains poorly understood.In this study,the effects of curcumin on saline-alkali resistance in A.trifoliata were examined by subjecting plants to a saline-alkali solution containing 150 mmol/L sodium ions(a mixture of Na_(2)SO_(4),Na_(2)CO_(3),and NaHCO_(3)).Curcumin treatment under these stress conditions leads to anatomical improvements in leaf structure.Furthermore,A.trifoliatamaintained a favorable Na^(+)/K^(+)ratio through increased potassium uptake and reduced sodium accumulation.Biochemical analysis revealed elevated levels of proline,soluble sugars,and soluble proteins,along with improved activities of antioxidant enzymes such as superoxide dismutase(SOD),catalase(CAT),and peroxidase(POD).Similarly,the concentrations of hydrogen peroxide(H_(2)O_(2))and malondialdehyde(MDA)were significantly reduced.Transcriptome analysis under saline-alkali stress conditions showed that curcumin influenced seven keymetabolic pathways annotated in the Kyoto Encyclopedia of Genes and Genomes(KEGG)database,with differentially expressed unigenes primarily enriched in transcription factor families such as MYB,AP2/ERF,NAC,bHLH,and C2C2.Moreover,eight differentially expressed genes(DEGs)associated with plant hormone signal transduction were linked to the auxin and brassinosteroid pathways,critical for cell elongation and plant growth.These findings indicate that curcumin increases saline-alkali stress tolerance in A.trifoliata by modulating physiological,biochemical,and transcriptional responses,ultimately supporting improved growth under adverse conditions.展开更多
针对现有深度学习算法在壁画修复时,存在全局语义一致性约束不足及局部特征提取不充分,导致修复后的壁画易出现边界效应和细节模糊等问题,提出一种双向自回归Transformer与快速傅里叶卷积增强的壁画修复方法.首先,设计基于Transformer...针对现有深度学习算法在壁画修复时,存在全局语义一致性约束不足及局部特征提取不充分,导致修复后的壁画易出现边界效应和细节模糊等问题,提出一种双向自回归Transformer与快速傅里叶卷积增强的壁画修复方法.首先,设计基于Transformer结构的全局语义特征修复模块,利用双向自回归机制与掩码语言模型(masked language modeling,MLM),提出改进的多头注意力全局语义壁画修复模块,提高对全局语义特征的修复能力.然后,构建了由门控卷积和残差模块组成的全局语义增强模块,增强全局语义特征一致性约束.最后,设计局部细节修复模块,采用大核注意力机制(large kernel attention,LKA)与快速傅里叶卷积提高细节特征的捕获能力,同时减少局部细节信息的丢失,提升修复壁画局部和整体特征的一致性.通过对敦煌壁画数字化修复实验,结果表明,所提算法修复性能更优,客观评价指标均优于比较算法.展开更多
现有的基于卷积神经网络的超分辨率重建方法由于感受野限制,难以充分利用遥感图像丰富的上下文信息和自相关性,导致重建效果不佳.针对该问题,本文提出了一种基于多重蒸馏与Transformer的遥感图像超分辨率(remote sensing image super-re...现有的基于卷积神经网络的超分辨率重建方法由于感受野限制,难以充分利用遥感图像丰富的上下文信息和自相关性,导致重建效果不佳.针对该问题,本文提出了一种基于多重蒸馏与Transformer的遥感图像超分辨率(remote sensing image super-resolution based on multi-distillation and Transformer,MDT)重建方法.首先结合多重蒸馏和双注意力机制,逐步提取低分辨率图像中的多尺度特征,以减少特征丢失.接着,构建一种卷积调制Transformer来提取图像的全局信息,恢复更多复杂的纹理细节,从而提升重建图像的视觉效果.最后,在上采样过程中添加全局残差路径,提高特征在网络中的传播效率,有效减少了图像的失真与伪影问题.在AID和UCMerced两个数据集上的进行实验,结果表明,本文方法在放大至4倍超分辨率任务上的峰值信噪比和结构相似度分别最高达到了29.10 dB和0.7807,重建图像质量明显提高,并且在细节保留方面达到了更好的视觉效果.展开更多
基金supported by the National Natural Science Foundation of China(Number:32060645)The Joint Special Project(Key Project)of Yunnan Province Local Undergraduate University(202101BA070001-036)+2 种基金The Joint Special Project(Surface Project)of Yunnan Province Local Undergraduate University(202101BA070001-172)the Science Research Fund Project for Education Department of Yunnan Province(Numbers:2023Y0876,2023Y0860,2023J0828)the Basic Research Special Project for Science and Technology Department of Yunnan Provincial(Number:202301AU070137).
文摘Soil salinization is a major abiotic stress that hampers plant development and significantly reduces agricultural productivity,posing a serious challenge to global food security.Akebia trifoliata(Thunb.)Koidz,a species within the genus Akebia Decne.,is valued for its use in food,traditionalmedicine,oil production,and as an ornamental plant.Curcumin,widely recognized for its pharmacological properties including anti-cancer,anti-neuroinflammatory,and anti-fibrotic effects,has recently drawn interest for its potential roles in plant stress responses.However,its impact on plant tolerance to saline-alkali stress remains poorly understood.In this study,the effects of curcumin on saline-alkali resistance in A.trifoliata were examined by subjecting plants to a saline-alkali solution containing 150 mmol/L sodium ions(a mixture of Na_(2)SO_(4),Na_(2)CO_(3),and NaHCO_(3)).Curcumin treatment under these stress conditions leads to anatomical improvements in leaf structure.Furthermore,A.trifoliatamaintained a favorable Na^(+)/K^(+)ratio through increased potassium uptake and reduced sodium accumulation.Biochemical analysis revealed elevated levels of proline,soluble sugars,and soluble proteins,along with improved activities of antioxidant enzymes such as superoxide dismutase(SOD),catalase(CAT),and peroxidase(POD).Similarly,the concentrations of hydrogen peroxide(H_(2)O_(2))and malondialdehyde(MDA)were significantly reduced.Transcriptome analysis under saline-alkali stress conditions showed that curcumin influenced seven keymetabolic pathways annotated in the Kyoto Encyclopedia of Genes and Genomes(KEGG)database,with differentially expressed unigenes primarily enriched in transcription factor families such as MYB,AP2/ERF,NAC,bHLH,and C2C2.Moreover,eight differentially expressed genes(DEGs)associated with plant hormone signal transduction were linked to the auxin and brassinosteroid pathways,critical for cell elongation and plant growth.These findings indicate that curcumin increases saline-alkali stress tolerance in A.trifoliata by modulating physiological,biochemical,and transcriptional responses,ultimately supporting improved growth under adverse conditions.
文摘针对现有深度学习算法在壁画修复时,存在全局语义一致性约束不足及局部特征提取不充分,导致修复后的壁画易出现边界效应和细节模糊等问题,提出一种双向自回归Transformer与快速傅里叶卷积增强的壁画修复方法.首先,设计基于Transformer结构的全局语义特征修复模块,利用双向自回归机制与掩码语言模型(masked language modeling,MLM),提出改进的多头注意力全局语义壁画修复模块,提高对全局语义特征的修复能力.然后,构建了由门控卷积和残差模块组成的全局语义增强模块,增强全局语义特征一致性约束.最后,设计局部细节修复模块,采用大核注意力机制(large kernel attention,LKA)与快速傅里叶卷积提高细节特征的捕获能力,同时减少局部细节信息的丢失,提升修复壁画局部和整体特征的一致性.通过对敦煌壁画数字化修复实验,结果表明,所提算法修复性能更优,客观评价指标均优于比较算法.
文摘现有的基于卷积神经网络的超分辨率重建方法由于感受野限制,难以充分利用遥感图像丰富的上下文信息和自相关性,导致重建效果不佳.针对该问题,本文提出了一种基于多重蒸馏与Transformer的遥感图像超分辨率(remote sensing image super-resolution based on multi-distillation and Transformer,MDT)重建方法.首先结合多重蒸馏和双注意力机制,逐步提取低分辨率图像中的多尺度特征,以减少特征丢失.接着,构建一种卷积调制Transformer来提取图像的全局信息,恢复更多复杂的纹理细节,从而提升重建图像的视觉效果.最后,在上采样过程中添加全局残差路径,提高特征在网络中的传播效率,有效减少了图像的失真与伪影问题.在AID和UCMerced两个数据集上的进行实验,结果表明,本文方法在放大至4倍超分辨率任务上的峰值信噪比和结构相似度分别最高达到了29.10 dB和0.7807,重建图像质量明显提高,并且在细节保留方面达到了更好的视觉效果.
