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This is a special state of condensed matter with long-range order that is neither three-dimensionally periodic nor quasicrystalline, but nevertheless possessing a higher degree of organization and higher symmetry than the individual crystals constituting the MTPs.

SEM-EDS分析得到所观察到的二十面体构形的颗粒的成分比B/O是6.4;另外一种四面体结构则有B/O为2,其相应的化学式是B〓O。

By constructing a sphere hexagonal grid system based on the Truncated Icosahedrons Projection, this paper focuses on the study of the address coding mechanism of the sphere hexagonal grids, including the hierarchy coding schemes, the study of the positional relations among the grid units and the mutual conversion between the address codes of the grid units and the geographical coordinates.

本文通过构建基于截顶正二十面体投影的球面六边形网格系统,对球面六边形网格的地址编码机制进行了重点研究,包括网格的层次编码方案、网格单元位置关系研究和网格单元地址码与地理坐标之间的相互转换。

The discovery of thermodynamic stable icosahedral quasicrystalline phase in various alloy systems triggered the intensive studies on their structures and physical properties.

热力学稳定的二十面体准晶的发现给研究和利用这种新的物质形态的结构和物性提供了契机。

A simple formula about the maximum atoms inthe icosahedral clusters and the range of interaction potential was proposed and proved to be rightby numerical method.

二十面体团簇所包含的最大原子数和有效势程之间的关系可以用一简单的关系式来描述。数值计算的结果与我们的理论相一致。

In addition, by using bondtype and polyhedron cluster type index methods to analyze the transformation of the microstructure, not only the key role of icosahedron in amorphous formation and stability can be explained, but also the solidification processes and the configuration characteristic of amorphous metals understood deeply.

此外采用键对及原子多面体类型指数法对凝固过程中微观结构组态变化的分析,不但能说明二十面体结构在非晶态合金形成和稳定性中所起的关键作用,又有助于对液态金属的凝固过程、非晶态结构特征的深入理解。

The results of XRD (X-ray diffraction), SEM show that the Al-Cu-Fe quasicrystalline coating is dense and uniform, by preparing from Al70Cu20Fe10 powders with particle size of 325 mesh (4.5μm). After annealing under vacuum condition of 800℃ for 2 hours, it is observed that the icosahedron phase is the major phase together with a few β-Al phase.

由X-射线衍射XRD(X-Ray Diffraction)、扫描电镜SEM分析得出:采用原子比为A170Cu20Fe10、粒度为-325目的粉末制备的涂层,在800℃下真空退火处理2h后,结构均匀致密,二十面体准晶相含量高,并只含有少量的β相。

We found the most stable structures of Al13 and Al-13 icosahedrons, while the ground-state structure of Al+13 is other structure.

中性团簇和负离子团簇的基态结构是稍微有些变形的二十面体结构,正离子团簇是另外的结构。

Morphologically and biologically, the triple-layered rotavirus particles are composed of three protein capsids, outer capsid includes VP4 and VP7, the middle is VP6, and the core is composed of VP2. VP1, VP3 and the 11 segments of double-stranded genomic RNA.

完整的轮状病毒颗粒直径约70nm,为正二十面体结构,由三层蛋白壳包绕,外壳为VP4及VP7蛋白,VP6蛋白构成病毒第二层蛋白壳,最内层为核壳,由结构蛋白VP1、VP2、VP3组成,核壳内包含有11个分节段的病毒双链RNA基因片段。

When citrate ions were introduced to manipulate the nucleation and growth process, star-shaped icosahedra and nanorods with pentagram cross-sections were obtained.

通过向溶液中引入柠檬酸离子调控纳米颗粒的成核与生长过程,我们首次合成出了星状钯二十面体和截面为五角星形的钯纳米棒。

When citrate ions were introduced to manipulate the nucleation and growth process, star-shaped icosahedra and nanorods with pentagram cross-sections were obtained.

通过向溶液中引入柠檬酸离子调控纳米颗粒的成核与生长过程,首次合成出了星状钯二十面体和截面为五角星形的钯纳米棒。

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。