By analysing the experimental principle of zeeman effect in document [ 1 ] , it is pointed out in this paper that the experiment content about the measurement of the charge - mass ratio of electron in document [ 1 ] is improper 本文通过对文献[ 1 ]关于塞曼效应实验原理的分析,指出了其实验内容之测电子荷质比的不当之处
We also consider the lotka - volterra system . we construct the examples of the classes 26 , 28 , 29 ( under zeeman ' s classification ) in three dimensional lotka - volterra competitive system with two limit cycles and the class 27 with three limit cycles 对于高维的微分动力系统,我们考虑数学生物学领域中最为基本和重要的lotka - volterra系统,分别构造了该系统在zeeman分类下的第26 , 28 , 29类具有两个小扰动极限环和第27类具有三个极限环的例子
A theoretical model of the ecmm has been founded in this dissertation to study the magnetization and the magnetostrictive characteristics of the ecmm . the results are expected to provide a theoretical guidance for the designing and fabricating of the ecmm . firstly , the exchange energy , magnetic anisotropic energy , zeeman energy , magnetostrictive energy , pure elastic energy and stress energy have been introduced in the landau free energy 为了深入认识磁致伸缩交换耦合多层膜的磁化行为及磁致伸缩特性,本文建立了纳米双相交换耦合磁致伸缩多层膜的理论模型,研究了材料参数对多层膜磁化行为及磁致伸缩特性的影响,为磁致伸缩交换耦合多层膜材料的制备与设计提供理论依据和指导。