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排序方式: 共有115条查询结果,搜索用时 18 毫秒
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目的 以喷施4种杀菌剂防治马铃薯Y病毒病的样品为试验原料,研究防效与干物质、淀粉、还原糖和维生素C含量之间关系,分析各营养成分之间的相关性。方法 在国家标准基础上稍加改动测定营养成分,采用矩阵散点图、标准化残差P-P图、一元线性回归分析防效与营养成分及各营养成分之间的相关性。结果 防效与干物质、维生素C和淀粉含量之间呈正相关,干物质含量与淀粉含量、维生素C呈正相关,维生素C含量与淀粉含量呈正相关,还原糖含量与维生素C含量、淀粉含量、干物质含量和平均防效四者之间无显著相关性。结论 4种杀菌剂中防效最好的为喷施5%氨基寡糖素水剂中剂量,且采收该小区马铃薯干物质含量、淀粉含量和维生素C含量最高。研究结果可为种植马铃薯防治Y病毒病筛选最佳药剂,为马铃薯病害防治与营养成分之间相关性提供数据支撑。 相似文献
114.
Ling-Han Song Chen Wang Jian-Sheng Fan Hong-Ming Lu 《Computer-Aided Civil and Infrastructure Engineering》2023,38(10):1307-1323
Artificial intelligence is gaining increasing popularity in structural analysis. However, at the structural system level, the appropriateness of data representation, the paucity of data, and the physical interpretability of results are rarely studied and remain profound challenges. To fill such gaps, a physics-informed model named StructGNN-E (i.e., structural analysis based on graph neural network [GNN]–elastic) based on the GNN architecture, which is capable of implementing the elastic analysis of structural systems without labeled data, is proposed in this study. The systems with structural topologies and member configurations are organized as graph data and later processed by a modified graph isomorphism network. Moreover, to avoid dependence on big data, a novel physics-informed paradigm is proposed to incorporate mechanics into deep learning (DL), ensuring the theoretical correctness of the results. Numerical experiments and ablation studies demonstrate the unique effectiveness of StructGNN-E against common DL models, with an average accuracy of 99% and excellent computational efficiency. Due to its differentiability, StructGNN-E is promising for bidirectionally linking structural parameters and analysis results, paving the way for a new end-to-end structural optimization method in the future. 相似文献
115.
Jing-Yan Liu Xiang-Hong Zhang Hua Fang Shu-Quan Zhang Yong Chen Qing Liao Hong-Ming Chen Hui-Peng Chen Mei-Jin Lin 《Small (Weinheim an der Bergstrasse, Germany)》2023,19(44):2302197
Synaptic devices that mimic biological synapses are considered as promising candidates for brain-inspired devices, offering the functionalities in neuromorphic computing. However, modulation of emerging optoelectronic synaptic devices has rarely been reported. Herein, a semiconductive ternary hybrid heterostructure is prepared with a D-D’-A configuration by introducing polyoxometalate (POM) as an additional electroactive donor (D’) into a metalloviologen-based D-A framework. The obtained material features an unprecedented porous 8-connected bcu -net that accommodates nanoscale [α-SiW12O40]4− counterions, displaying uncommon optoelectronic responses. Besides, the fabricated synaptic device based on this material can achieve dual-modulation of synaptic plasticity due to the synergetic effect of electron reservoir POM and photoinduced electron transfer. And it can successfully simulate learning and memory processes similar to those in biological systems. The result provides a facile and effective strategy to customize multi-modality artificial synapses in the field of crystal engineering, which opens a new direction for developing high-performance neuromorphic devices. 相似文献