目的探讨脑卒中患者上肢运动神经元功能状态与运动功能之间的相关性,为康复评定和功能预后判断提供指导。方法选取2020年11月—2021年1月于东南大学附属中大医院康复医学科住院的脑卒中患者。采用运动单位数目估计(motor unit number es...目的探讨脑卒中患者上肢运动神经元功能状态与运动功能之间的相关性,为康复评定和功能预后判断提供指导。方法选取2020年11月—2021年1月于东南大学附属中大医院康复医学科住院的脑卒中患者。采用运动单位数目估计(motor unit number estimation,MUNE)和F波评估运动神经元功能状态,采用简式Fugl-Meyer评定量表(Fugl-Meyer Assessment,FMA)和改良Ashworth评分(Modified Ashworth Scale,MAS)评定患者上肢运动功能,并分析MUNE、F波相关参数与FMA评分和MAS评分的相关性。结果共纳入患者42例,合并患侧屈腕肌痉挛16例。42例脑卒中患者患侧拇短展肌MUNE低于健侧(t=-3.466,P=0.001),患侧不同形状F波计数比例明显低于健侧(Z=-5.583,P<0.001)。16例合并屈腕肌痉挛脑卒中患者的患侧F波波幅高于健侧(t=2.764,P=0.014),患侧F波潜伏期与健侧比较,差异无统计学意义(Z=-0.595,P=0.552)。42例脑卒中患者健患侧不同形状F波计数比例比值与FMA评分呈正相关(rs=0.377,P=0.014),健患侧MUNE比值与FMA评分无相关性(rs=0.104,P=0.513)。16例合并屈腕肌痉挛脑卒中患者的健患侧F波波幅比值与屈腕肌MAS评分呈正相关(rs=0.550,P=0.027)。结论脑卒中后偏瘫侧上肢功能性运动神经元数量减少和运动神经元兴奋性增高同时存在,并与运动功能和肌张力呈相关性。展开更多
The sensitivity problem to mesh distortion and the low accuracy problem of the stress solutions are two inherent difficulties in the finite element method.By applying the fundamental analytical solutions (in global Ca...The sensitivity problem to mesh distortion and the low accuracy problem of the stress solutions are two inherent difficulties in the finite element method.By applying the fundamental analytical solutions (in global Cartesian coordinates) to the Airy stress function of the anisotropic materials,8-and 12-node plane quadrilateral hybrid stress-function (HS-F) elements are successfully developed based on the principle of the minimum complementary energy.Numerical results show that the present new elements exhibit much better and more robust performance in both displacement and stress solutions than those obtained from other models.They can still perform very well even when the element shapes degenerate into a triangle and a concave quadrangle.It is also demonstrated that the proposed construction procedure is an effective way for developing shape-free finite element models which can completely overcome the sensitivity problem to mesh distortion and can produce highly accurate stress solutions.展开更多
目的:探讨神经肌肉关节促进训练对脑性瘫痪(cerebral palsy,CP,脑瘫)患儿智力及肢体功能的影响。方法:2016年12月到2018年12月选择在本院儿保科门诊就诊的脑瘫患儿134例,根据治疗方法分为观察组与对照组,各67例。对照组给予常规康复训练...目的:探讨神经肌肉关节促进训练对脑性瘫痪(cerebral palsy,CP,脑瘫)患儿智力及肢体功能的影响。方法:2016年12月到2018年12月选择在本院儿保科门诊就诊的脑瘫患儿134例,根据治疗方法分为观察组与对照组,各67例。对照组给予常规康复训练,观察组在对照组给予神经肌肉关节促进训练,两组康复观察3个月,记录智力及肢体功能变化情况。结果:观察组的总有效率为98.5%,高于对照组的83.6%(P<0.05)。两组康复后的粗大运动功能测试量表(gross motor function measure,GMFM)评分都高于康复前(P<0.05),观察组高于对照组(P<0.05)。两组康复后的适应与语言行为评分都高于康复前(P<0.05),观察组也高于对照组(P<0.05)。两组康复后的F波振幅高于康复前(P<0.05),阈值低于康复前(P<0.05),康复后观察组与对照组对比差异也都有统计学意义(P<0.05)。结论:神经肌肉关节促进训练在脑瘫患儿的应用能促进改善智力及肢体功能,重建患儿的肌电功能,从而提高治疗效果。展开更多
针对多电平并网逆变器拓扑结构复杂、算法运算量大的问题,提出了一种新的非对称三相三电平拓扑结构及其改进的快速模型预测控制(fast model predictive contol,F-MPC)算法,与传统三电平逆变器拓扑结构相比具有更少的箝位器件,提高了系...针对多电平并网逆变器拓扑结构复杂、算法运算量大的问题,提出了一种新的非对称三相三电平拓扑结构及其改进的快速模型预测控制(fast model predictive contol,F-MPC)算法,与传统三电平逆变器拓扑结构相比具有更少的箝位器件,提高了系统的可靠性,降低了所需空间及成本;所提算法由于不用计算全部矢量的代价函数,大大缩短了计算时间,提高系统的响应速度。在MATLAB仿真模型和小型实验平台得到的结果验证了所提拓扑结构和算法的合理性及有效性。展开更多
Based on a daily precipitation observation dataset of 743 stations in China from 1951 2004, the F distribution function is used to calculate the probability distribution of daily precipitation and to define extreme pr...Based on a daily precipitation observation dataset of 743 stations in China from 1951 2004, the F distribution function is used to calculate the probability distribution of daily precipitation and to define extreme precipitation events. Based on this, the relationship of ENSO and the frequency of extreme precipitation events is studied. Results reveal that ENSO events have impact on extreme precipitation events, with different magnitudes at different regions and seasons. In general, during winter and spring, extreme precipitation events occur more often during E1 Nino events than during La Nina events. While during summer and autumn, the opposite is found. The relationship of a two season-lag ENSO and extreme precipitation frequency shows different pattern. Extreme precipitation events occur more often in several regions if an ENSO warm phase happened in the central-eastern tropical Pacific two seasons before. No similar impacts of El Nino and La Nina on the frequency of extreme precipitation events are found.展开更多
文摘目的探讨脑卒中患者上肢运动神经元功能状态与运动功能之间的相关性,为康复评定和功能预后判断提供指导。方法选取2020年11月—2021年1月于东南大学附属中大医院康复医学科住院的脑卒中患者。采用运动单位数目估计(motor unit number estimation,MUNE)和F波评估运动神经元功能状态,采用简式Fugl-Meyer评定量表(Fugl-Meyer Assessment,FMA)和改良Ashworth评分(Modified Ashworth Scale,MAS)评定患者上肢运动功能,并分析MUNE、F波相关参数与FMA评分和MAS评分的相关性。结果共纳入患者42例,合并患侧屈腕肌痉挛16例。42例脑卒中患者患侧拇短展肌MUNE低于健侧(t=-3.466,P=0.001),患侧不同形状F波计数比例明显低于健侧(Z=-5.583,P<0.001)。16例合并屈腕肌痉挛脑卒中患者的患侧F波波幅高于健侧(t=2.764,P=0.014),患侧F波潜伏期与健侧比较,差异无统计学意义(Z=-0.595,P=0.552)。42例脑卒中患者健患侧不同形状F波计数比例比值与FMA评分呈正相关(rs=0.377,P=0.014),健患侧MUNE比值与FMA评分无相关性(rs=0.104,P=0.513)。16例合并屈腕肌痉挛脑卒中患者的健患侧F波波幅比值与屈腕肌MAS评分呈正相关(rs=0.550,P=0.027)。结论脑卒中后偏瘫侧上肢功能性运动神经元数量减少和运动神经元兴奋性增高同时存在,并与运动功能和肌张力呈相关性。
基金supported by the National Natural Science Foundation of China(Grant No.10872108,10876100)the Program for New Century Excellent Talents in University(Grant No. NCET-07-0477)+1 种基金the National Basic Research Program of China(Grant No. 2010CB832701)ASFC
文摘The sensitivity problem to mesh distortion and the low accuracy problem of the stress solutions are two inherent difficulties in the finite element method.By applying the fundamental analytical solutions (in global Cartesian coordinates) to the Airy stress function of the anisotropic materials,8-and 12-node plane quadrilateral hybrid stress-function (HS-F) elements are successfully developed based on the principle of the minimum complementary energy.Numerical results show that the present new elements exhibit much better and more robust performance in both displacement and stress solutions than those obtained from other models.They can still perform very well even when the element shapes degenerate into a triangle and a concave quadrangle.It is also demonstrated that the proposed construction procedure is an effective way for developing shape-free finite element models which can completely overcome the sensitivity problem to mesh distortion and can produce highly accurate stress solutions.
文摘目的:探讨神经肌肉关节促进训练对脑性瘫痪(cerebral palsy,CP,脑瘫)患儿智力及肢体功能的影响。方法:2016年12月到2018年12月选择在本院儿保科门诊就诊的脑瘫患儿134例,根据治疗方法分为观察组与对照组,各67例。对照组给予常规康复训练,观察组在对照组给予神经肌肉关节促进训练,两组康复观察3个月,记录智力及肢体功能变化情况。结果:观察组的总有效率为98.5%,高于对照组的83.6%(P<0.05)。两组康复后的粗大运动功能测试量表(gross motor function measure,GMFM)评分都高于康复前(P<0.05),观察组高于对照组(P<0.05)。两组康复后的适应与语言行为评分都高于康复前(P<0.05),观察组也高于对照组(P<0.05)。两组康复后的F波振幅高于康复前(P<0.05),阈值低于康复前(P<0.05),康复后观察组与对照组对比差异也都有统计学意义(P<0.05)。结论:神经肌肉关节促进训练在脑瘫患儿的应用能促进改善智力及肢体功能,重建患儿的肌电功能,从而提高治疗效果。
文摘针对多电平并网逆变器拓扑结构复杂、算法运算量大的问题,提出了一种新的非对称三相三电平拓扑结构及其改进的快速模型预测控制(fast model predictive contol,F-MPC)算法,与传统三电平逆变器拓扑结构相比具有更少的箝位器件,提高了系统的可靠性,降低了所需空间及成本;所提算法由于不用计算全部矢量的代价函数,大大缩短了计算时间,提高系统的响应速度。在MATLAB仿真模型和小型实验平台得到的结果验证了所提拓扑结构和算法的合理性及有效性。
基金supported by the program under Grant No.2007BAC29B04
文摘Based on a daily precipitation observation dataset of 743 stations in China from 1951 2004, the F distribution function is used to calculate the probability distribution of daily precipitation and to define extreme precipitation events. Based on this, the relationship of ENSO and the frequency of extreme precipitation events is studied. Results reveal that ENSO events have impact on extreme precipitation events, with different magnitudes at different regions and seasons. In general, during winter and spring, extreme precipitation events occur more often during E1 Nino events than during La Nina events. While during summer and autumn, the opposite is found. The relationship of a two season-lag ENSO and extreme precipitation frequency shows different pattern. Extreme precipitation events occur more often in several regions if an ENSO warm phase happened in the central-eastern tropical Pacific two seasons before. No similar impacts of El Nino and La Nina on the frequency of extreme precipitation events are found.
