文章对Zr-Sn系锆合金中间工序管坯采用两种退火工序制备,采用扫描电镜(Scanning Electron Microscope,SEM)对其微观组织形貌进行观察,并对其第二相尺寸进行统计,最后对其腐蚀性能进行分析。SPPs统计结果表明,退火工序的选择对SPPs的尺...文章对Zr-Sn系锆合金中间工序管坯采用两种退火工序制备,采用扫描电镜(Scanning Electron Microscope,SEM)对其微观组织形貌进行观察,并对其第二相尺寸进行统计,最后对其腐蚀性能进行分析。SPPs统计结果表明,退火工序的选择对SPPs的尺寸形貌有显著影响,A样品内析出相的数量明显多于样品B,且尺寸相对较大。腐蚀结果表明,采用A工序退火的TREX管坯更耐均匀腐蚀。展开更多
本研究利用空间金字塔池化(Spatial Pyramid Pooling,SPP)和全局平均池化(Global Average Pooling,GAP)优化传统的AlexNet架构,并将其应用于无人驾驶汽车的视觉识别系统中。这项研究旨在提高无人驾驶车辆通过摄像头感知环境的准确性和...本研究利用空间金字塔池化(Spatial Pyramid Pooling,SPP)和全局平均池化(Global Average Pooling,GAP)优化传统的AlexNet架构,并将其应用于无人驾驶汽车的视觉识别系统中。这项研究旨在提高无人驾驶车辆通过摄像头感知环境的准确性和效率。首先,笔者对AlexNet算法进行了改进,集成了SPP和GAP。SPP的引入使网络能够更有效地处理不同尺寸的图像,得到改进的AlexNet-SG网络,从而捕捉更多的空间信息。GAP的应用减少了模型的参数数量,从而降低了过拟合的风险并加快了训练速度。这些改进不仅增强了模型的泛化能力,还提高了网络对复杂场景的识别能力。本研究使用真实世界的交通环境数据对改进后的模型进行了测试,实验涵盖了多种交通场景,包括直车道、弯车道、人行道等。研究结果表明,AlexNet-SG在处理复杂交通场景时的表现明显优于原始模型,特别是在识别距离和准确率方面取得了显著提升。展开更多
The double flower developmental process is regulated via a complex transcriptional regulatory network.To understand this highly dynamic and complex developmental process of Dianthus spp.,we performed a comparative ana...The double flower developmental process is regulated via a complex transcriptional regulatory network.To understand this highly dynamic and complex developmental process of Dianthus spp.,we performed a comparative analysis of floral morphology and transcriptome dynamics in simple flowers and double flowers.We found that the primordium of double flowers of‘X’was larger in size compared to that of simple flowers of‘L’in Dianthus chinensis.RNA-seq and Weighted Gene Co-expression Network Analysis(WGCNA)during flower development,identified stage-specific gene network modules.Expression analysis by RNA-seq indicated that a group of genes related to floral meristem identity,primordia position and polarity were highly expressed in double flowers genotypes compared to simple flowers genotypes,suggesting their roles in double-petal formation.A total of 21 DEGs related to petal number were identified between simple and double flowers.The experiments of in situ hybridization revealed that DcaAP2L,DcaLFY and DcaUFO genes were expressed in the intra-sepal boundary and petal boundary.We proposed a potential transcriptional regulatory network for simple and double flower development.This study provides novel insights into the molecular mechanism underlying double flower formation in Dianthus spp.展开更多
文摘文章对Zr-Sn系锆合金中间工序管坯采用两种退火工序制备,采用扫描电镜(Scanning Electron Microscope,SEM)对其微观组织形貌进行观察,并对其第二相尺寸进行统计,最后对其腐蚀性能进行分析。SPPs统计结果表明,退火工序的选择对SPPs的尺寸形貌有显著影响,A样品内析出相的数量明显多于样品B,且尺寸相对较大。腐蚀结果表明,采用A工序退火的TREX管坯更耐均匀腐蚀。
文摘本研究利用空间金字塔池化(Spatial Pyramid Pooling,SPP)和全局平均池化(Global Average Pooling,GAP)优化传统的AlexNet架构,并将其应用于无人驾驶汽车的视觉识别系统中。这项研究旨在提高无人驾驶车辆通过摄像头感知环境的准确性和效率。首先,笔者对AlexNet算法进行了改进,集成了SPP和GAP。SPP的引入使网络能够更有效地处理不同尺寸的图像,得到改进的AlexNet-SG网络,从而捕捉更多的空间信息。GAP的应用减少了模型的参数数量,从而降低了过拟合的风险并加快了训练速度。这些改进不仅增强了模型的泛化能力,还提高了网络对复杂场景的识别能力。本研究使用真实世界的交通环境数据对改进后的模型进行了测试,实验涵盖了多种交通场景,包括直车道、弯车道、人行道等。研究结果表明,AlexNet-SG在处理复杂交通场景时的表现明显优于原始模型,特别是在识别距离和准确率方面取得了显著提升。
基金supported by funding from National Natural Science Foundation of China(Grant Nos.32002074 and 31872135)China Postdoctoral Science Foundation(Grant No.2021M693445)。
文摘The double flower developmental process is regulated via a complex transcriptional regulatory network.To understand this highly dynamic and complex developmental process of Dianthus spp.,we performed a comparative analysis of floral morphology and transcriptome dynamics in simple flowers and double flowers.We found that the primordium of double flowers of‘X’was larger in size compared to that of simple flowers of‘L’in Dianthus chinensis.RNA-seq and Weighted Gene Co-expression Network Analysis(WGCNA)during flower development,identified stage-specific gene network modules.Expression analysis by RNA-seq indicated that a group of genes related to floral meristem identity,primordia position and polarity were highly expressed in double flowers genotypes compared to simple flowers genotypes,suggesting their roles in double-petal formation.A total of 21 DEGs related to petal number were identified between simple and double flowers.The experiments of in situ hybridization revealed that DcaAP2L,DcaLFY and DcaUFO genes were expressed in the intra-sepal boundary and petal boundary.We proposed a potential transcriptional regulatory network for simple and double flower development.This study provides novel insights into the molecular mechanism underlying double flower formation in Dianthus spp.
