搜索结果: 1-9 共查到“工学 fMRI”相关记录9条 . 查询时间(0.046 秒)
2023年3月24日，《Nature Communications》期刊在线发表题为《Sleep fMRI with simultaneous electrophysiology at 9.4T in male mice》的研究论文。该研究由中国科学院脑科学与智能技术卓越创新中心（神经科学研究所）梁智锋研究组与北京大学未来技术学院生物医学工程系段小洁研究组合作共同完成。该研究建立了基于同时电生理记...
Erratum for van Meer F et al. Developmental differences in the brain response to unhealthy food cues: an fMRI study of children and adults. Am J Clin Nutr 2016;104:1515–22
van Meer unhealthy food fMRI study
2018/11/13
Erratum for van Meer F et al. Developmental differences in the brain response to unhealthy food cues: an fMRI study of children and adults. Am J Clin Nutr 2016;104:1515–22.
Challenges in accurately modeling the complexity of human ingestive behavior: the influence of portion size and energy density of food on fMRI food-cue reactivity
accurately modeling ingestive behavior energy density of food
2018/11/12
Ingestive behavior is determined by a complex interaction between neurophysiologic and behavioral and environmental contributors that begins early in life. A better understanding of this complex regul...
Developmental differences in the brain response to unhealthy food cues: an fMRI study of children and adults
childhood obesity children food viewing healthy food fMRI
2018/12/19
Background: Food cues are omnipresent and may trigger overconsumption. In the past 2 decades, the prevalence of childhood obesity has increased dramatically. Because children’s brains are still develo...
Detection of Cognitive States from fMRI data using Machine Learning Techniques
Sequence Learning fMRI visuomotor Naive Bayes Classifier Support Vector machine Nearest neighbour classification
2015/7/29
Over the past decade functional Magnetic Resonance Imaging (fMRI) has emerged as a powerful technique to locate activity of human brain while engaged in a particular task or cognitive state. We consid...
Satiation attenuates BOLD activity in brain regions involved in reward and increases activity in dorsolateral prefrontal cortex: an fMRI study in healthy volunteers
fMRI, hypothalamus, prefrontal cortex, reward, satiation
2018/12/24
Background: Neural responses to rewarding food cues are significantly different in the fed vs. fasted (>8 h food-deprived) state. However, the effect of eating to satiety after a shorter (more natural...
提出了一种新的fMRI数据处理方法，融合了统计参数图（SPM）、独立成分分析(ICA)所提取的特征信息，实现脑功能激活区的准确提取。首先通过时段设计实验获取了反应不同握力条件下手运动相关皮层活动的fMRI数据，并且进行相应的预处理；然后采用SPM和ICA方法分别提取脑功能信息；研究了一种基于主成分分析的图像融合算法。最后，应用图像融合算法对SPM和ICA方法分别提取的脑功能信息进行融合。结果表明，...
脑fMRI特征重建的分层快速聚类方法
感兴趣区域 层次聚类 K-均值聚类
2009/12/10
在对大脑fMRI感兴趣区域的分析中，利用特征选择所得到的筛选属性进行特征重建问题上，提出了分层快速聚类的分析方法，同已有K-均值聚类方法相比，在聚类有效性得到提高的前提下，总体降低了聚类的时间代价，并为后续的回归分析处理提供了精确保证。
fMRI脑图的感知状态分析 ——回归模型及其寻优的非同质检验
感知状态 fMRI脑图
2008/3/10
脑功能核磁共振图像fMRI的特点是定位准确,但信噪比低、数据量大。对fMRI数据的泛回归模型的超参数寻优问题作了分析,提出基于非同质检验的超参数确认方法,重点比较了它在线性和非线性的回归方式（包括岭回归,支持向量回归,Elman递归神经网络）下针对不同外界环境特征的回归能力差异,实验所采用原始数据均来自PBAIC2006,结果表明,该方法在对相关领域知识较少依赖的前提下,具有较好的稳定性和泛化能力...