埃尔金及其同事在研究中使用了一种光子晶体来制造隐形斗篷。这种光子晶体的结构看上去像成堆的木头。
In their study, Ergin and his colleagues used photonic crystals with a structure that looks like piles of wood to make an invisibility device, or cloak.
“他站在讲台上宣称,‘达尼埃尔·谢赫特曼是胡说八道,没有准晶体这回事,只有准科学家’”谢赫·特曼说。
"He would stand on those platforms and declare, 'Danny Shechtman is talking nonsense. There is no such thing as quasicrystals, only quasi-scientists.'" Shechtman said.
“他站在讲台上宣称,‘达尼埃尔·谢赫特曼是胡说八道,没有准晶体这回事,只有准科学家’”谢赫·特曼说。
He would stand on those platforms and declare, 'Danny Shechtman is talking nonsense. There is no such thing as quasicrystals, only quasi-scientists.'
他们取了个晶体,一个具有规则原子平面的,镍晶体,这些面间距差不多也是一埃或者更少,它们放射出X射线。
They took a crystal, this is a single crystal of nickel that has regular planes of atoms, and those planes are spaced on the order of an angstrom or less apart, and they irradiated this with x-rays.
采用埃夫琴晶胞推导了计算二维三角离子晶体的马德隆常数的通项公式。
By Evjen crystal cell, the calculation formula about Madelung constant for the two-dimensional trigonal ion crystal was deduced.
采用埃夫琴晶胞推导了计算二维三角离子晶体的马德隆常数的通项公式。
By Evjen crystal cell, the calculation formula about Madelung constant for the two-dimensional trigonal ion crystal was deduced.
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