目的:借助网状Meta分析法比较不同运动方式对儿童粗大动作发展的影响效果。方法:检索中国知网(CNKI)、Pubmed、Web of Science、Embase、Cochrane等数据库,筛选运动干预儿童粗大动作的随机对照试验相关文献,检索时间截至2023年12月31日...目的:借助网状Meta分析法比较不同运动方式对儿童粗大动作发展的影响效果。方法:检索中国知网(CNKI)、Pubmed、Web of Science、Embase、Cochrane等数据库,筛选运动干预儿童粗大动作的随机对照试验相关文献,检索时间截至2023年12月31日,运用Cochrane偏倚风险评估工具进行方法学质量评价后,采用Stata 17.0软件进行统计学分析。结果:最终纳入36篇文献,共计3420名参与者。Meta分析结果显示:韵律性体育活动、功能性练习、球类运动、结构化体育课程、体育游戏、基本动作技能练习、有氧运动对儿童身体移动技能的影响显著优于对照组;韵律性体育活动、功能性练习、球类运动、结构化体育课程、体育游戏、基本动作技能练习对儿童物体控制技能的影响显著优于对照组;在提升儿童身体移动技能、物体控制技能方面,结构化体育课程是最为有效的干预措施。展开更多
针对现有目标跟踪算法存在目标感知能力较弱、实时性不足以及目标易丢失的问题,提出一种结合金字塔池化和目标运动轨迹的单目标跟踪算法(Pyramid pooling Transformer for single object tracking,PPTTrack)。首先,算法采用PVT作为骨干...针对现有目标跟踪算法存在目标感知能力较弱、实时性不足以及目标易丢失的问题,提出一种结合金字塔池化和目标运动轨迹的单目标跟踪算法(Pyramid pooling Transformer for single object tracking,PPTTrack)。首先,算法采用PVT作为骨干网络构建深度神经网络,建立模板图和搜索图之间的双向信息流通道,提升跟踪算法的目标感知能力;其次,在骨干网络中引入金字塔池化方法缩短K,V的序列长度,降低模型复杂度,提高算法运行速率;最后,将跟踪目标的运动轨迹构建为一个Motion Token输入到编码器中进行特征融合,利用运动轨迹连续性预测目标位置,以解决目标丢失问题。实验结果表明,上述算法在GOT-10K、LaSOT、UAV123以及TrackingNet四个基准数据集上的性能均达到了较为先进的水平。展开更多
Eye movements play an important role in attention and visual processing. However, the manner in which eye move-ments are involved in object processing is not clear. The aim of this study is to examine the effects of e...Eye movements play an important role in attention and visual processing. However, the manner in which eye move-ments are involved in object processing is not clear. The aim of this study is to examine the effects of eye movements on object-processing areas in the occipito-temporal region. Eye movements are always accompanied by visual perception;therefore, the effects of eye movements on object-processing areas in which visual object information is sent via eye movements instead of via retinal inputs of visual images must be measured. For this purpose, response to an eye- drawing stimulation in subjects who drew pictures of faces or buildings by their moving eyes under closed-eye condi-tions was measured by functional magnetic resonance imaging. Functional areas in the occipito-temporal region showed negative responses to the eye-drawing stimulation, and the pattern of negative activation maps in the region was almost the same as that of positive activation maps observed after visual image stimulation. Responses in cate-gory-selective area showed category dependency to the eye-drawing stimulation. This suggests that eye movements provide inhibitory inputs to the object-processing areas in the occipito-temporal region, and these inputs may modulate visual inputs to these areas coming through the retina in the visual perception process.展开更多
文摘目的:借助网状Meta分析法比较不同运动方式对儿童粗大动作发展的影响效果。方法:检索中国知网(CNKI)、Pubmed、Web of Science、Embase、Cochrane等数据库,筛选运动干预儿童粗大动作的随机对照试验相关文献,检索时间截至2023年12月31日,运用Cochrane偏倚风险评估工具进行方法学质量评价后,采用Stata 17.0软件进行统计学分析。结果:最终纳入36篇文献,共计3420名参与者。Meta分析结果显示:韵律性体育活动、功能性练习、球类运动、结构化体育课程、体育游戏、基本动作技能练习、有氧运动对儿童身体移动技能的影响显著优于对照组;韵律性体育活动、功能性练习、球类运动、结构化体育课程、体育游戏、基本动作技能练习对儿童物体控制技能的影响显著优于对照组;在提升儿童身体移动技能、物体控制技能方面,结构化体育课程是最为有效的干预措施。
文摘针对现有目标跟踪算法存在目标感知能力较弱、实时性不足以及目标易丢失的问题,提出一种结合金字塔池化和目标运动轨迹的单目标跟踪算法(Pyramid pooling Transformer for single object tracking,PPTTrack)。首先,算法采用PVT作为骨干网络构建深度神经网络,建立模板图和搜索图之间的双向信息流通道,提升跟踪算法的目标感知能力;其次,在骨干网络中引入金字塔池化方法缩短K,V的序列长度,降低模型复杂度,提高算法运行速率;最后,将跟踪目标的运动轨迹构建为一个Motion Token输入到编码器中进行特征融合,利用运动轨迹连续性预测目标位置,以解决目标丢失问题。实验结果表明,上述算法在GOT-10K、LaSOT、UAV123以及TrackingNet四个基准数据集上的性能均达到了较为先进的水平。
文摘Eye movements play an important role in attention and visual processing. However, the manner in which eye move-ments are involved in object processing is not clear. The aim of this study is to examine the effects of eye movements on object-processing areas in the occipito-temporal region. Eye movements are always accompanied by visual perception;therefore, the effects of eye movements on object-processing areas in which visual object information is sent via eye movements instead of via retinal inputs of visual images must be measured. For this purpose, response to an eye- drawing stimulation in subjects who drew pictures of faces or buildings by their moving eyes under closed-eye condi-tions was measured by functional magnetic resonance imaging. Functional areas in the occipito-temporal region showed negative responses to the eye-drawing stimulation, and the pattern of negative activation maps in the region was almost the same as that of positive activation maps observed after visual image stimulation. Responses in cate-gory-selective area showed category dependency to the eye-drawing stimulation. This suggests that eye movements provide inhibitory inputs to the object-processing areas in the occipito-temporal region, and these inputs may modulate visual inputs to these areas coming through the retina in the visual perception process.
