Bravais

Moreover, extinction rules and Bravais types are derived and tabulated in order to facilitate the determination of the superspace group symmetry.

还较详尽地推导了Bravais格子和系统消光规律，并给出它们的完整的表格，以利于空间群的确定。

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The significance of the Niggli reduced cell is in its uniqueness and in the possibility that it can be used for determining Bravais lattice.

Niggli约化胞的唯一性使其能应用于确定晶体的Bravais点阵。

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A new classification on the reduced cell and the criteria corresponding to the reducing treatment has been developed, and the relationships between the symmetry reduced cell and Bravais lattice are also given in the present paper.

为此，提出了一种新的约化胞分类法及其约化处理的判据，并给出了对称约化胞与Bravais点阵之间的对应关系。

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As in the case of Bravais lattices, the model with two-spin interactions and the one with three-spin interactions belong to different universality classes.

研究表明，与布喇菲晶格上的情况一样，最近邻二体相互作用伊辛模型与三体相互作用伊辛模型（Baxter-Wu模型）属于不同的普适类。

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The Reducing treatment of primitive cells is an important process to reconstruct the lattice and to determine the Bravais lattice of unknown crystals. The errors of the data used for reconstruction, which come from the measurement and calculations, usually make the reducing treatment uncertain and difficult.

初基胞约化处理是重构点阵和确定未知晶体Bravais点阵的一个重要环节，原始数据的测量误差和计算引入的积累误差给初基胞约化处理造成困难和不确定性。

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Implementation of complete two-dimensional bandgap in photonic crystals of square Bravais lattice using complex unit cell

利用复式晶胞实现二维正方形布拉菲格子光子晶体的完全带隙

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And then selection rule of Bravais' cell and Niggli's cell theory are introduced in turn; after that, conception of coordination shape is presented and discussed;

然后又介绍了与配位形相关的布拉菲胞选取准则及尼格里胞理论：紧接着引入配位形的概念；

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The Application of Niggli Reduced Cell in the Determination of Bravais Lattice

Niggli约化胞在确定Bravais点阵中的应用

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The symmetry average points for crystals with cubic and hexagonal Bravais lattices are given and the calculation accuracy is illustrated numerically through an real example.

文内给出了立方和六角晶格的对称平均点，并用具体的数值计算例子说明了它的计算精度。

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