查询词典 crystal lattice

In the surface of the substrate the liquid crystal molecules parallel to the surface as a consequence of the surface potential. Adopting the Lebwohl Lasher model, the mole cular centers of mass are located at the sites of the simple cubic lattice with period boundary conditions.

在基板表面处，液晶薄层受到表面作用势的作用使液晶分子沿面平行排列，采用Lebwohl Lasher模型，将分子质心固定在简单立方晶格的格点上，并对此格点模型赋以周期性边界条件，然后将简立方格点模型分为平行于基板的20个分子薄层，得到各薄层的指向矢分布的数值结果。

We design a square lattice photonic crystal symmetry resonant cavity four-channel optical filter, the filter efficiency of every channel is high than 96%.

根据该条件，设计出正方晶格光子晶体对称式谐振腔四信道光滤波器，各信道滤波效率均高达96%。

Some application examples on the determination of crystal orientation ,micro-texture,crystallographic orientation relationship,stress distribution,lattice parameters,phase identification and boundary nature study with EBSD have been given.

论述了电子背散射衍射的形成原理、花样包含的物理意义，并给出了EBSD在测定晶体取向、织构、取向关系、物相鉴定、应变分布、晶格常数及晶界性质研究等方面的应用实例。

Crystal structure was determined by powder X-ray Diffraction and lattice parameters as a function of Sr-concentration x were obtained by using Rietveld method.

在80K-300K温度范围的直流电阻率测量表明，材料的电性质在x=0.2和0.3之间展示了从半导体到金属的相变。x=0.2样品已接近绝缘体-金属相变的边缘。

Moreover, it is closely related to the crystal structures of reinforcement and matrix alloy. The formation of above crystallographic relationships is valuable to decrease the energy of lattice strain between reinforcement and matrix alloy.

与增强体的晶体结构及基体合金的晶体结构密切相关，形成该位相关系有利于降低增强体与基体合金界面的晶格畸变能。

Because of the nondirectional property of ionic bond and the fully delocalized property of pi electrons on carbon layers, translation will not change the electronic structure of carbon layers, resulting in that A-GIC and AE-GIC hare quite good lubrication as well. The electrons come from metals mainly transfer to the delocalized pi orbitals of carbon layers, and the increase of delocalized electrons will make metal graphite intercalation compound more electro-conductive than graphite itself. Because ionic bond between metals and carbon layers is weaker and its lattice energy is much less than that of typical NaCl crystal, so metals could be left from interlayers. The Mulliken populations of C-C in intercalation compounds are smaller than that of graphite, and the HOMO energy level of GIC is higher than that of graphite too. These Lead to that GIC will easier be oxidized.

由于离子键没有方向性，又由于碳层中的π电子是充分离域的，所以碳层不会由于平移而改变其电子结构，金属石墨层间化合物仍具有很好的润滑性；金属失去的电子主要转移到碳层的离域π轨道中，碳层离域电子增多使金属石墨层间化合物的导电性比石墨增强；金属与碳层间的离子键强度比较弱，其晶格能远小于典型的离子晶体，因而金属易从石墨层中脱出；金属石墨层间化合物中的C-C间Mulliken布居值小于石墨中C-C间的值，且金属石墨层间化合物的HOMO能级也高于石墨的HOMO能级，所以石墨层间化合物中的碳原子较石墨更易被氧化。

The polarization field E(?=3.2×108 volts/cm, E1∩=3.3×108 volts/cm at a Cl- lattice point, and the polarization energy Up(?=-102K α-TiCl3 sandwich-type layer crystal have been calculated, based upon an ionic model.

本文根据离子晶体模型，计算了α-TiCl_3层状晶体内氯离子格点上的极化电场强度E_⊥=13.2×10~8伏/厘米，E_(11=3.3×10~8伏/厘米，以及晶体的极化能U_(p⊥=-102千卡/克分子，U_(p11)=-167千卡/克分子和晶格能(U=-1206千卡/克分子)。

The plane wave expansion method was employed to calculate the band gap structures of 3D simple cubic lattice phononic crystal composed of elliptical steel cylinders embedded in epoxy matrix.

用平面波法研究了椭圆钢柱与环氧树脂组成的三维简立方晶格声子晶体的带隙结构。

distortions in a nematic liquid crystal composed of n molecular layers is investigated using a simple cubic lattice model, based upon the dispersion force pair potential with spatial anisotropy.

基于空间各向异性色散力势能，用简单的立方格子模型研究具有n层液晶分子所组成的向列相液晶形变。

In chapter III,we investigate the lattice dynamical properties of tetragonal La2CuO4single crystal using a five parameter rigid-ion model.

在第三章中，我们用一个五参数的Rigid-ion模型对正方结构La2CuO4单晶的晶格动力学性质进行了研究。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。