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GDMNet: A Unified Multi-Task Network for Panoptic Driving Perception
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作者 yunxiang liu Haili Ma +1 位作者 Jianlin Zhu Qiangbo Zhang 《Computers, Materials & Continua》 SCIE EI 2024年第8期2963-2978,共16页
To enhance the efficiency and accuracy of environmental perception for autonomous vehicles,we propose GDMNet,a unified multi-task perception network for autonomous driving,capable of performing drivable area segmentat... To enhance the efficiency and accuracy of environmental perception for autonomous vehicles,we propose GDMNet,a unified multi-task perception network for autonomous driving,capable of performing drivable area segmentation,lane detection,and traffic object detection.Firstly,in the encoding stage,features are extracted,and Generalized Efficient Layer Aggregation Network(GELAN)is utilized to enhance feature extraction and gradient flow.Secondly,in the decoding stage,specialized detection heads are designed;the drivable area segmentation head employs DySample to expand feature maps,the lane detection head merges early-stage features and processes the output through the Focal Modulation Network(FMN).Lastly,the Minimum Point Distance IoU(MPDIoU)loss function is employed to compute the matching degree between traffic object detection boxes and predicted boxes,facilitating model training adjustments.Experimental results on the BDD100K dataset demonstrate that the proposed network achieves a drivable area segmentation mean intersection over union(mIoU)of 92.2%,lane detection accuracy and intersection over union(IoU)of 75.3%and 26.4%,respectively,and traffic object detection recall and mAP of 89.7%and 78.2%,respectively.The detection performance surpasses that of other single-task or multi-task algorithm models. 展开更多
关键词 Autonomous driving multitask learning drivable area segmentation lane detection vehicle detection
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Artificial Intelligence Education in Primary and Secondary Schools from the Perspective of Thinking Quality
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作者 Min Peng Jingming Xie +1 位作者 Maohua Xiong yunxiang liu 《Journal of Contemporary Educational Research》 2023年第4期41-46,共6页
With the vigorous development of social economy in China,various advanced technologies and equipment have emerged,among which artificial intelligence(AI)has rapidly developed and achieved remarkable results when appli... With the vigorous development of social economy in China,various advanced technologies and equipment have emerged,among which artificial intelligence(AI)has rapidly developed and achieved remarkable results when applied to many fields.Therefore,leaders and teachers in primary and secondary schools should pay more attention to AI education and explore effective measures to optimize the effectiveness of this education.Among them,carrying out artificial intelligence education and teaching from the perspective of thinking quality,with an aim to improve students’technical ability and effectively cultivate their thinking skills,may improve students’learning efficiency and teachers’teaching efficiency.How to carry out AI education from the perspective of thinking quality is an important issue that teachers need to address urgently.Through in-depth research,we focus on this issue,in hope to benefit primary and secondary school teachers. 展开更多
关键词 Thinking quality Primary and secondary schools Artificial intelligence Teaching path Online publication:April 25 2023
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Females prefer males producing a high-rate song with shorter timbal-stridulatory sound intervals in a cicada species
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作者 Zehai HOU yunxiang liu +1 位作者 Songshan WEI Cong WEI 《Current Zoology》 SCIE CAS CSCD 2022年第1期103-112,共10页
Uncovering mate choice and factors that lead to the choice are very important to understanding sexual selection in evolutionary change.Cicadas are known for their loud sounds produced by males using the timbals.Howeve... Uncovering mate choice and factors that lead to the choice are very important to understanding sexual selection in evolutionary change.Cicadas are known for their loud sounds produced by males using the timbals.However,males in certain cicada species emit 2 kinds of sounds using respectively timbals and stridulatory organs,and females may produce their own sounds to respond to males.What has never been considered is the mate choice in such cicada species.Here,we investigate the sexual selection and potential impact of predation pressure on mate choice in the cicada Subpsaltria yangi Chen.It possesses stridulatory sound-producing organs in both sexes in addition to the timbals in males.Results show that males producing calling songs with shorter timbal–stridulatory sound intervals and a higher call rate achieved greater mating success.No morphological traits were found to be correlated with mating success in both sexes,suggesting neither males nor females display mate preference for the opposite sex based on morphological traits.Males do not discriminate among responding females during mate searching,which may be due to the high energy costs associated with their unusual mate-seeking activity and the male-biased predation pressure.Females generally mate once but a minority of them re-mated after oviposition which,combined with the desirable acoustic traits of males,suggest females may maximize their reproductive success by choosing a high-quality male in the first place.This study contributes to our understanding mechanisms of sexual selection in cicadas and other insects suffering selective pressure from predators. 展开更多
关键词 CICADIDAE female choice mating success predation pressure sexual selection.
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