In this paper,we give a definition of Bloch mappings defined in the unit polydisk D^n, which generalizes the concept of Bloch functions defined in the unit disk D.It is known that Bloch theorem fails unless we have so...In this paper,we give a definition of Bloch mappings defined in the unit polydisk D^n, which generalizes the concept of Bloch functions defined in the unit disk D.It is known that Bloch theorem fails unless we have some restrictive assumption on holomorphic mappings in several complex variables.We shall establish the corresponding distortion theorems for subfamiliesβ(K)andβ_(loc)(K) of Bloch mappings defined in the polydisk D^n,which extend the distortion theorems of Liu and Minda to higher dimensions.As an application,we obtain lower and upper bounds of Bloch constants for various subfamilies of Bloeh mappings defined in D^n.In particular,our results reduce to the classical results of Ahlfors and Landau when n=1.展开更多
视觉控制能力对于运动学习的重要意义正如其对于课业学习一样,是认知活动的首要关卡。儿童软式垒球的教学与研究在我国方兴未艾。为探究眼动特征与运动学习的关系,使用德制i View X HED4头戴式眼动仪,测量15名有过棒球训练的儿童与15名...视觉控制能力对于运动学习的重要意义正如其对于课业学习一样,是认知活动的首要关卡。儿童软式垒球的教学与研究在我国方兴未艾。为探究眼动特征与运动学习的关系,使用德制i View X HED4头戴式眼动仪,测量15名有过棒球训练的儿童与15名从未接受过棒球训练的儿童,在击球前0.167 s、0.1 s以及击中球体时的视觉落点偏移值,分析视觉落点偏移值与击球成功率的关系,比较有无棒球训练经验对儿童的视觉落点偏移值的影响,以及击球成功率不同的儿童的视觉落点偏移值差异。结论:(1)无论有无棒球训练经验,视觉落点偏移值均与击球成功率呈现显著负相关(P<0.01);(2)棒球组儿童的视觉落点偏移值显著小于一般组(P<0.05);(3)击球成功率为100%的儿童,存在明显不同于其他儿童的眼动特异性,视觉控制能力显著优于其他儿童(P<0.01)。展开更多
By means of programs GTMPAC based- on generalized triangle method,analysis and synthesis of mechanism design in accordance with absolutely graphicalmethod( absolutely germetrical method) are developed.In this paper,we...By means of programs GTMPAC based- on generalized triangle method,analysis and synthesis of mechanism design in accordance with absolutely graphicalmethod( absolutely germetrical method) are developed.In this paper,we make aspecial study about centering- point curve and circling- point curve and couplercurves based on Ball’s points.展开更多
基金This work was supported by the National Natural Science Foundation of China(Grant No.10571164)Specialized Research Fund for the Doctoral Program of Higher Education(SRFDP)(Grant No.20050358052)
文摘In this paper,we give a definition of Bloch mappings defined in the unit polydisk D^n, which generalizes the concept of Bloch functions defined in the unit disk D.It is known that Bloch theorem fails unless we have some restrictive assumption on holomorphic mappings in several complex variables.We shall establish the corresponding distortion theorems for subfamiliesβ(K)andβ_(loc)(K) of Bloch mappings defined in the polydisk D^n,which extend the distortion theorems of Liu and Minda to higher dimensions.As an application,we obtain lower and upper bounds of Bloch constants for various subfamilies of Bloeh mappings defined in D^n.In particular,our results reduce to the classical results of Ahlfors and Landau when n=1.
文摘By means of programs GTMPAC based- on generalized triangle method,analysis and synthesis of mechanism design in accordance with absolutely graphicalmethod( absolutely germetrical method) are developed.In this paper,we make aspecial study about centering- point curve and circling- point curve and couplercurves based on Ball’s points.
