对转换城乡二元经济结构的分析

在阐述二元经济结构理论的基础上,分析了我国二元结构的特征及对经济的影响,并提出了我国二元结构转换的对策。     

论英语语言学习与数学思维

在这篇文章中我们通过对数学语言与英语语言的对比,指出两种语言的对比实际上是,两种语言思维模式的对比。并从概念结构思维与数学映射思维的角度对英语语言做了初步探讨,为英语语言学习者,教学工作者提供了一个新的学习研究途径。     

关于当前大学生消费状况的调查分析与思考

本文通过对当前大学生消费状况的抽样调查,用统计数据描述了当前大学生的经济采源与家庭经济状况、消费水平与消费结构,消费认知与消费习惯,进而讨论分析了当前天学生的消费特点,并对高校在当前大学生消费的教育与引导方面提出了相关建议。     

Two-dimensional characterization of three-dimensional magnetic bubbles in Fe3Sn2 nanostructures

We report differential phase contrast scanning transmission electron microscopy (TEM) of nanoscale magnetic objects in Kagome ferromagnet Fe₃Sn₂ nanostructures. This technique can directly detect the deflection angle of a focused electron beam, thus allowing clear identification of the real magnetic structures of two magnetic objects including three-ring and complex arch-shaped vortices in Fe₃Sn₂ by Lorentz-TEM imaging. Numerical calculations based on real material-specific parameters well reproduced the experimental results, showing that the magnetic objects can be attributed to integral magnetizations of two types of complex three-dimensional (3D) magnetic bubbles with depth-modulated spin twisting. Magnetic configurations obtained using the high-resolution TEM are generally considered as two-dimensional (2D) magnetic objects previously. Our results imply the importance of the integral magnetizations of underestimated 3D magnetic structures in 2D TEM magnetic characterizations.