It is not clear whether the method used in functional brain-network related research can be applied to explore the feature binding mechanism of visual perception. In this study, we inves-tigated feature binding of col...It is not clear whether the method used in functional brain-network related research can be applied to explore the feature binding mechanism of visual perception. In this study, we inves-tigated feature binding of color and shape in visual perception. Functional magnetic resonance imaging data were collected from 38 healthy volunteers at rest and while performing a visual perception task to construct brain networks active during resting and task states. Results showed that brain regions involved in visual information processing were obviously activated during the task. The components were partitioned using a greedy algorithm, indicating the visual network existed during the resting state.Z-values in the vision-related brain regions were calculated, conifrming the dynamic balance of the brain network. Connectivity between brain regions was determined, and the result showed that occipital and lingual gyri were stable brain regions in the visual system network, the parietal lobe played a very important role in the binding process of color features and shape features, and the fusiform and inferior temporal gyri were crucial for processing color and shape information. Experimental ifndings indicate that understanding visual feature binding and cognitive processes will help establish computational models of vision, improve image recognition technology, and provide a new theoretical mechanism for feature binding in visual perception.展开更多
针对多视觉任务中传输成本高、解码端计算压力大的问题,提出一种自适应可伸缩视频编码(adaptive scalable video coding,ASVC)传输框架,将视频分为语义层和背景层,分别传输语义和背景信息。此外,提出一种自适应压缩算法,构建了C4.5决策...针对多视觉任务中传输成本高、解码端计算压力大的问题,提出一种自适应可伸缩视频编码(adaptive scalable video coding,ASVC)传输框架,将视频分为语义层和背景层,分别传输语义和背景信息。此外,提出一种自适应压缩算法,构建了C4.5决策树模型分析网络环境对视频进行压缩的决策判定,并对帧序列进行光流分析,在保留变化显著的帧基础上引入插值机制保持图像的平滑性。仿真结果表明,ASVC方法在不同码率环境下表现更高的识别精准率,视频质量和传输效率的显著提升。展开更多
目的 分析任务导向性训练(task-oriented training,TOT)在脑卒中康复领域中的研究现状、热点及趋势。方法 系统检索中国知网、万方数据知识服务平台、维普网、中国生物医学文献服务系统和Web of Science数据库自建库至2025年4月关于TOT...目的 分析任务导向性训练(task-oriented training,TOT)在脑卒中康复领域中的研究现状、热点及趋势。方法 系统检索中国知网、万方数据知识服务平台、维普网、中国生物医学文献服务系统和Web of Science数据库自建库至2025年4月关于TOT干预脑卒中康复的研究。采用Cite Space 6.3.R1软件对发文量、作者、机构及关键词进行可视化分析,同时绘制可视化知识图谱。结果 中文数据库和英文数据库分别纳入相关文献314篇和283篇,中文发文量总体呈上升趋势,英文发文量则稳中有降;发文机构间合作较少,未形成稳定的核心作者团队;TOT在脑卒中偏瘫患者的肢体功能康复、日常生活能力等方面应用广泛。结论 TOT应用于脑卒中康复领域的研究正处于发展阶段,TOT与中医特色技术、人工智能的联合将成为研究热点。展开更多
基金financially supported by grants from the National Natural Science Foundation of China,No.61170136,61373101,61472270,and 61402318Natural Science Foundation(Youth Science and Technology Research Foundation)of Shanxi Province,No.2014021022-5Shanxi Provincial Key Science and Technology Projects(Agriculture),No.20130311037-4
文摘It is not clear whether the method used in functional brain-network related research can be applied to explore the feature binding mechanism of visual perception. In this study, we inves-tigated feature binding of color and shape in visual perception. Functional magnetic resonance imaging data were collected from 38 healthy volunteers at rest and while performing a visual perception task to construct brain networks active during resting and task states. Results showed that brain regions involved in visual information processing were obviously activated during the task. The components were partitioned using a greedy algorithm, indicating the visual network existed during the resting state.Z-values in the vision-related brain regions were calculated, conifrming the dynamic balance of the brain network. Connectivity between brain regions was determined, and the result showed that occipital and lingual gyri were stable brain regions in the visual system network, the parietal lobe played a very important role in the binding process of color features and shape features, and the fusiform and inferior temporal gyri were crucial for processing color and shape information. Experimental ifndings indicate that understanding visual feature binding and cognitive processes will help establish computational models of vision, improve image recognition technology, and provide a new theoretical mechanism for feature binding in visual perception.
文摘针对多视觉任务中传输成本高、解码端计算压力大的问题,提出一种自适应可伸缩视频编码(adaptive scalable video coding,ASVC)传输框架,将视频分为语义层和背景层,分别传输语义和背景信息。此外,提出一种自适应压缩算法,构建了C4.5决策树模型分析网络环境对视频进行压缩的决策判定,并对帧序列进行光流分析,在保留变化显著的帧基础上引入插值机制保持图像的平滑性。仿真结果表明,ASVC方法在不同码率环境下表现更高的识别精准率,视频质量和传输效率的显著提升。
文摘目的 分析任务导向性训练(task-oriented training,TOT)在脑卒中康复领域中的研究现状、热点及趋势。方法 系统检索中国知网、万方数据知识服务平台、维普网、中国生物医学文献服务系统和Web of Science数据库自建库至2025年4月关于TOT干预脑卒中康复的研究。采用Cite Space 6.3.R1软件对发文量、作者、机构及关键词进行可视化分析,同时绘制可视化知识图谱。结果 中文数据库和英文数据库分别纳入相关文献314篇和283篇,中文发文量总体呈上升趋势,英文发文量则稳中有降;发文机构间合作较少,未形成稳定的核心作者团队;TOT在脑卒中偏瘫患者的肢体功能康复、日常生活能力等方面应用广泛。结论 TOT应用于脑卒中康复领域的研究正处于发展阶段,TOT与中医特色技术、人工智能的联合将成为研究热点。
