据南丹麦大学的埃尔维斯·格波·徐介绍,一次性口罩是塑料制品。
According to Elvis Genbo Xu from the University of Southern Denmark, disposable masks are plastic products.
“增长是好事,但未见得足以改善营养”,作者:奥利维尔·埃克,克莱门斯·布雷·辛格,卡尔·波夫。
Growth is good, but not enough to improve nutrition ", by Olivier Ecker, Clemens Breisinger and Karl Pauw."
指出一维单原子链的格波解是由于采用了循环边界条件的结果。
The lattice wave solution of single atomic chain only results from the cyclic boundary condition.
给出了在简谐近似下,一维格波色散关系的一般表达式,并对其结果进行了分析。
This paper gives and analyses a general expression of the dispersion relation of one-dimensional lattice waves in simple harmonic approximation.
以一维单原子链为例,对晶格振动的行波解和简正坐标进行了分析和讨论,给出了一种新的格波解。
The plane wave solutions and ortho coordinates of lattice vibration are analyzed. A new solution is given.
以一维单原子链为例,对晶格振动的行波解和简正坐标进行了分析和讨论,给出了一种新的格波解。
The plane wave solutions and ortho coordinates of lattice vibration are analyzed. A new solution is given.
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