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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。

The object of the study was investigated the nanostructured precipitates and superparamagnetic properties of the γ-austenite face centered cubic Fe-9A1-30Mn-1C-0.5Si alloys, for which two kinds of specimens were solution-treated quenching in oil, and the S. T. quenching in oil then cold-forged 20%~50% strain, respectively.

本研究计画之目的，系探讨沃斯田铁面心立方结构之铁－9铝－30锰－1碳－0.5矽合金，两种试样时效热处理后内部微析出物显微结构与超顺磁性质之关系，两种试样分别为闯溶油冷与因溶油冷锻应变20%-50%，再同时於823K持温140天时效处理。

The Pd-Cu/C catalysts were shown to have the face centered cubic crystal structure. This could indicate that the addition of Cu shortened the Pd-Pd distances in the crystal lattice, and therefore –HO(subscript 2ads) and O-O could be better adsorbed on the surface of the catalyst. When NaBH4 was used as the reducing agent, and the atomic ratio of Pd to Cu was 3:1, the resulting catalysts had an average particle size of 3. 4nm and showed the best catalytic performance. The electrochemical active surface are a of Pd3Cu/C was 38.9m^2/gPd and the oxidation reduction reaction activity of the Pd3Cu/C catalyst was much higher than that of the Pd/C catalyst. The electrochemical activity of the Pd3Cu/C catalyst was comparable to that of a commercial Pt/C catalyst.

结果表明：催化剂中Pd与Cu的物质的量之比与预设值相近，Pd和Cu基本被全部还原；Pd-Cu/C催化剂为面心立方结构，元素铜的加入使催化剂的Pd-Pd间距缩小，从而HO(下标 2 ads)和OO键能更好地吸附在催化剂金属表面；当采用NaBH4为还原剂，Pd与Cu物质的量比为3：1时，催化剂(Pd3Cu/C)的平均粒径为3.4 nm，催化剂的催化性能最好，电化学活性表面积EAS达到38.9平方公尺/gPd，电化学性能较Pd/C催化剂有很大提高，接近Pt/C商用催化剂。

Crown ether was introduced to copolymerize with the monomer of styrene owing to which can associate with silver ions. The silver ions were in-situ reduced to silver nanoparticles by UV light. Then silver nanoparticles were led on the surface of polystyrene latex particles. The vertical precipitation was employed to get the spheres self-assembled into close packed colloidal crystal with a face centered cubic structure identified.

利用冠醚可与银离子复合的特性，制备了聚苯乙烯－冠醚乳胶粒，采用原位还原的方法在乳胶粒表面引入银纳米颗粒，通过垂直沉降，乳胶粒子可自组装成紧密堆积具有面心立方的聚苯乙烯－银胶体晶体。

The spherical , monodispersed , ultrafine cobalt powder with a face centered cubic structure and a size less than lum were synthesized by the reduction of tetra hydrated in glycol or 1,2-propanediol.

经(来源：A0eBccccC论文网www.abclunwen.com)过探索实验和正交实验，找出最佳制备工艺，制备出晶粒尺寸小于1um，具有面心立方晶体结构且分散性较好的球形的超细钴粉。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。