目的运用静息态功能磁共振成像(resting-state function magnetic resonance imaging,rs-fMRI)探究太极拳零基础者在太极拳不同学习阶段的脑功能活动的局部一致性(regional homogeneity,ReHo)变化。材料与方法采用被试内设计,对18名太...目的运用静息态功能磁共振成像(resting-state function magnetic resonance imaging,rs-fMRI)探究太极拳零基础者在太极拳不同学习阶段的脑功能活动的局部一致性(regional homogeneity,ReHo)变化。材料与方法采用被试内设计,对18名太极拳零基础被试在太极拳学习初期(2周)和学习14周进行同样内容的静息态功能磁共振成像检查。然后分别计算前后两个不同时间点被试的全脑ReHo值并进行相关统计学分析。结果与太极拳学习2周比较,太极拳学习14周被试右侧梭状回的ReHo值显著增高,而右侧小脑和左侧顶上小叶的ReHo值显著降低(AlphaSim校正P<0.05);其中右侧小脑的ReHo的变化值与太极拳技能评分的变化值呈显著负相关(r=-0.507,P=0.032)。多元回归分析发现,太极拳学习2周被试的右侧颞中回、右侧前扣带回的ReHo值与太极拳技能评分的变化量呈显著正相关(r=0.908、0.818,P<0.01),而左侧枕下回及右侧颞上回的ReHo值与太极拳技能评分的变化量呈显著负相关(r=-0.474,P<0.05;r=-0.824,P<0.01)。结论研究结果表明,随着太极拳学习技能水平的提高,被试的静息态功能活动局部一致性变化,反映了相关脑区可塑性。另外,太极拳学习初期某些脑区的ReHo值对太极拳技能学习效果有一定的潜在预测作用。展开更多
The accurate estimation of evapotranspiration (ET) in arid regions is important for improving the water use efficiency of vegetation. Based on successive observations from May to October of 2014, we estimated the ET o...The accurate estimation of evapotranspiration (ET) in arid regions is important for improving the water use efficiency of vegetation. Based on successive observations from May to October of 2014, we estimated the ET of a Populus euphratica Oliv. forest during the growing season in an extremely arid region using the PM (Penman-Monteith), SW (Shuttleworth-Wallace) and SSW (an improved canopy transpiration model) models. Estimated ET values were compared with those of the eddy covariance measurements. Results indicated that the actual ET of the P. euphratica forest was always overestimated by the PM model. The accuracy of the SW model was higher than that of the PM model. However, some data were not easily obtained because of the complicated structure of the SW model. The newly proposed SSW model gave the most accurate ET values, and its accuracy was higher at hourly than at daily time scale. In conclusion, the SSW model is more suitable for sparse vegetation system at large scales in extremely arid regions.展开更多
The progress of China Spaceflight makes a great impetus for the development of space medicine.With the developing of China Space Station,the national space medicine has attained great achievements.In this paper,the ba...The progress of China Spaceflight makes a great impetus for the development of space medicine.With the developing of China Space Station,the national space medicine has attained great achievements.In this paper,the basic research of Space Medicine and its application in China during 2014—2016 are briefly reviewed.展开更多
The application of manned spaceflight makes a great impetus on the development of space medicine. With the deep growth of Chinese manned space, our national space medicine has attained great achievements. In this pape...The application of manned spaceflight makes a great impetus on the development of space medicine. With the deep growth of Chinese manned space, our national space medicine has attained great achievements. In this paper, the basic research of Space Medicine and its application in China during 2012–2014 were briefly reviewed.展开更多
Accompanying the flourishing developments of China's manned spaceflight,space medicine has achieved great development during the past two years in China.In this paper,scientific research of space medicine and its ...Accompanying the flourishing developments of China's manned spaceflight,space medicine has achieved great development during the past two years in China.In this paper,scientific research of space medicine and its application in China during 2010-2012 have been briefly introduced.展开更多
文摘目的运用静息态功能磁共振成像(resting-state function magnetic resonance imaging,rs-fMRI)探究太极拳零基础者在太极拳不同学习阶段的脑功能活动的局部一致性(regional homogeneity,ReHo)变化。材料与方法采用被试内设计,对18名太极拳零基础被试在太极拳学习初期(2周)和学习14周进行同样内容的静息态功能磁共振成像检查。然后分别计算前后两个不同时间点被试的全脑ReHo值并进行相关统计学分析。结果与太极拳学习2周比较,太极拳学习14周被试右侧梭状回的ReHo值显著增高,而右侧小脑和左侧顶上小叶的ReHo值显著降低(AlphaSim校正P<0.05);其中右侧小脑的ReHo的变化值与太极拳技能评分的变化值呈显著负相关(r=-0.507,P=0.032)。多元回归分析发现,太极拳学习2周被试的右侧颞中回、右侧前扣带回的ReHo值与太极拳技能评分的变化量呈显著正相关(r=0.908、0.818,P<0.01),而左侧枕下回及右侧颞上回的ReHo值与太极拳技能评分的变化量呈显著负相关(r=-0.474,P<0.05;r=-0.824,P<0.01)。结论研究结果表明,随着太极拳学习技能水平的提高,被试的静息态功能活动局部一致性变化,反映了相关脑区可塑性。另外,太极拳学习初期某些脑区的ReHo值对太极拳技能学习效果有一定的潜在预测作用。
基金supported by the National Natural Science Foundation of China(41271037)the Youth Foundation of National Natural Science of China(41401033)
文摘The accurate estimation of evapotranspiration (ET) in arid regions is important for improving the water use efficiency of vegetation. Based on successive observations from May to October of 2014, we estimated the ET of a Populus euphratica Oliv. forest during the growing season in an extremely arid region using the PM (Penman-Monteith), SW (Shuttleworth-Wallace) and SSW (an improved canopy transpiration model) models. Estimated ET values were compared with those of the eddy covariance measurements. Results indicated that the actual ET of the P. euphratica forest was always overestimated by the PM model. The accuracy of the SW model was higher than that of the PM model. However, some data were not easily obtained because of the complicated structure of the SW model. The newly proposed SSW model gave the most accurate ET values, and its accuracy was higher at hourly than at daily time scale. In conclusion, the SSW model is more suitable for sparse vegetation system at large scales in extremely arid regions.
文摘The progress of China Spaceflight makes a great impetus for the development of space medicine.With the developing of China Space Station,the national space medicine has attained great achievements.In this paper,the basic research of Space Medicine and its application in China during 2014—2016 are briefly reviewed.
文摘The application of manned spaceflight makes a great impetus on the development of space medicine. With the deep growth of Chinese manned space, our national space medicine has attained great achievements. In this paper, the basic research of Space Medicine and its application in China during 2012–2014 were briefly reviewed.
文摘Accompanying the flourishing developments of China's manned spaceflight,space medicine has achieved great development during the past two years in China.In this paper,scientific research of space medicine and its application in China during 2010-2012 have been briefly introduced.
