2020年8月11日 · Our results showed that the GMD in the right frontal pole (FP), right superior frontal gyrus (SFG), and right middle frontal gyrus significantly increased and GMV and CT in the right temporal pole (TP) significantly decreased after 24 h of acute SD.

2022年10月8日 · This approach revealed altered FC between anterior insular subregions (dAI and vAI) and different regions of the brain, with notable enhancement of FC with the bilateral SFG and putamen. The enhanced FC between the left dAI and the right SFG was found to be positively correlated with poorer PVT performance.

2020年8月11日 · Our results showed that the GMD in the right frontal pole (FP), right superior frontal gyrus (SFG), and right middle frontal gyrus significantly increased and GMV and CT in the right temporal...

2019年5月1日 · GMD in a 256 mm 3 cluster in the left superior frontal gyrus (SFG; x = −25, y = −8, z = 68; BA 6), showed a double dissociation, depicted in Fig. 2 a: better mathematical performance (as indicated by Numerical Strategies and Numerical Agility) was associated with lower GMD in non-mathematicians [r(36) = –.51, p < .05]; in contrast, better ...

2020年4月7日 · Gray matter volume (GMV) represents the absolute amount of gray matter (Good et al., 2001; Mechelli et al., 2005), whereas gray matter density (GMD) represents the relative concentration of gray matter structures in spatially warped images (i.e., the proportion of gray matter relative to all tissue types within a region) (Mechelli et al., 2005).

2018年6月13日 · Voxel-based morphometry was used to measure gray matter density (GMD). Resting-state fMRI (rs-fMRI) was conducted to analyze functional MR, ReHo, and functional connectivity (FC). RESULTS GMD analysis results suggest that MAP patients, SCZ patients, and healthy volunteers show different GMDs within different brain regions.

2016年9月7日 · In this study, we proposed a support vector machine (SVM)-based method to discriminate between MCI patients and normal controls (NCs) using multi-level characteristics of magnetic resonance imaging (MRI). This method adopted a radial basis function (RBF) as the kernel function, and a grid search method to optimize the two parameters of SVM.

2023年4月26日 · 和频振动光谱（sum frequency generation vibrational spectroscopy， SFG-VS），又名振动和频光谱，是一种基于 非线性光学 原理和 脉冲激光技术 的先进的界面振动光谱实验方法。 其基本原理简单表述如下（图1）：当我们将两束脉冲激光，一束为可见光（ω1），另一束为红外光（ω2）时空重合于待测界面时，界面处会由于 二阶非线性光学效应 而产生一束新的波长的光，即和频光（ω3）。 这束和频光的频率恰好为两个入射光频率之和，即ω3=ω1+ω2， …

2016年4月22日 · 主和频振动光谱仪（SFG）能在准单分子层水平上研究材料界面分子结构与取向信息。 1）激光系统：脉宽：35fs，重复频率不低于1kHz，功率高（实验中用到的红外光和可见光能量不低于10mW），红外带宽不低于300cm-1。 A．振荡器（Oscillator）： 84MHz，平均功率>400mW，中心波长800nm，稳定性好，噪声低； C.光学波长转换器，包括OPA和DFG，产生红外光的范围2600nm-11000nm。 峰量子效率（peak QE）：95%，波长范围在200-1000nm。 …

Our results showed that the GMD in the right frontal pole (FP), right superior frontal gyrus (SFG), and right middle frontal gyrus significantly increased and GMV and CT in the right temporal pole (TP) significantly decreased after 24 h of acute SD.