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It is revealed that the maximum refractive index modulation coincides with the widest band gaps and the optimum volume fraction of the atoms is structure independent. The photonic bands of the face centered cubic ...

文中还计算了由各向异性介电小球构成的面心立方结构的光子能带并看到了禁带，这与各向同性介电小球构成的面心立方结构很不相同。

The results of X-ray diffraction showed that the nickel nanoparticles had face centered cubic structures and the structures of polyandinc have not been affected under high temperatures.

采用先合成导电聚苯胺，然后用多元醇原位液相还原的方法，合成了聚苯胺／镍纳米复合材料，纳米镍的含量约为19.22%。

XRD and TEM confirmed that the novel mesoporous silica has a diamonded face centered cubic structure with Fd3m symmetry, which was first reported up to date.

同时对它的物理性能包括比表面积、孔容和孔径通过N〓吸附-脱附技术进行了测定，考察了合成条件对其结构形成的影响。

Investigation of the ballistic propagation of acoustic wave through two almost same sintered samples with face - centered cubic lattices indicates that there is a band gap range respectively in two order quasi - homogeneous media.

研究超声波经过两个烧结样品的行为。两个烧结样品为有序的面心立方结构，它们的结构几乎相同。研究表明：在两个有序的准均匀的介质中分别有一个禁带区域。

Using oxalate as precursor, Al〓O〓-doped Co powder may contain only face centered cubic Co, i.

掺杂质点进入钴粉的晶格中，使之点阵常数发生了变化。

The structure of Xe, evidenced by TEM and selected-area electron diffractionexperiments, was face centered cubic in an fcc matrix.

而经重辐照(包括γ射线，电子束及重粒子等)的碱卤晶体就会形成碱金属胶心，这种碱金属胶心有着与其所在碱卤晶体中碱金属离子相同的立方面心结构，而且其晶格参数与它所在的碱卤晶体相比只有很小的偏差。

Phase change memory with N-GST can realize three-state storage in one PCM cell by using the resistivity difference between the amorphous state, the face centered cubic phase and the hexagonal phase of GST.

利用N-GST薄膜的非晶态、晶态面心立方相和晶态六方相的电阻率差异，能够在同一存储单元中存储三个状态，实现相变存储器的多态存储功能。

On the insertion of Li with low current density, the crystal structure is keeping original spinel; while with higher current desity or by thermal activation, owing to violent movement of Li~+ ions, part of crystal structure transforms into rock type similar to face—centered cubic structure of ferrous oxide.

结果表明，以较小电流密度嵌锂时，晶体结构保持原来的尖晶石型；当以较大电流密度嵌锂或热激活时，由于Li~+的运动加剧，部分晶体结构转变为类似于氧化亚铁的面心立方结构。

This problem dates back to 1611, when Johannes Kepler conjectured that the best packing arrangement for identical spheres was arranging them in what is now called face centered cubic packing - similar to how one sees cannon balls stacked.

这个问题可追溯到1611年约翰尼斯·开普勒提出堆积等大球体最佳方法的猜想（译者注：当等大球体按照--球心位于正方体各面的中心上--的形式，并且将第一层摆放成六角形时，它们占用的空间最小，对空间的利用率可以超过74%），现在把这个方法叫做面心立体堆积法--类似于加农炮弹的堆积方式。1998年，安娜堡密西根大学教授托马斯·C·黑尔斯证明了这个猜想。

SiO2 opal with face centered cubic structure is fabricated using a self-assembly method. Two different three-dimensionally ordered macroporous carbon materials are prepared using SiO2 opal as a template through "volume templating" and "surface templating" approaches, respectively. The final morphology of the sample can he controlled by the infiltration times.

通过自组装的方法制备了面心立方结构的SiO2欧泊，并利用其为模板，分别采用"体积模板"与"表面模板"两条途径，合成了两类不同结构的三维有序大孔碳材料，分析了填充次数对产物形貌结构的影响。

Foods high in this vitamin include oily fish such as salmon, tuna and, and fish liver oils.

维生素D含量高的食物包括诸如大麻哈鱼、金枪鱼和鲭鱼之类的油鱼以及鱼肝油。

We need you to cosign our public letter demanding that press intimidation cease immediately, and that all charges be dropped.

我们需要您cosign我们的公共信，要求记者立即停止恐吓，并要求所有收费下降。