常数

With the prolongation of milling time, the crystal size of mixed the powder reduced, while its lattice constant and lattice distortion increased gradually.

随着机械合金化的进行，粉末的晶粒度逐渐减小，而晶格常数和畸变则不断增加。

The structure of polarimeter is different from the traditional polarimeter. Changing the ratio of R/a between the radius of the metal stick and the lattice constant can design the working wave band in advance and obtain high degree of polarization and transmission rate.

本发明提供的偏振器结构不同于传统的偏振器，它可以通过只改变金属棒的半径和晶格常数R/a的比，预先设计工作波段，并且可以得到高的偏振度和透射率。

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。

In fact, the total energies for the possible metastable alloy phases of A〓B and AB〓 types of six possible structures were calculated as a function of their lattice constant to find out if the respective metastable phases of A〓B or AB〓 types could be relatively stable in the selected systems. The calculation not only predicted the possible metastable states but also the lattice constant of the corresponding metastable alloy phases of either FCC or HCP structures.

对可能存在的A〓B或AB〓型亚稳合金相的六种结构，将总能量作为点阵常数的函数进行了计算，用以找到选定系统中相对稳定的A〓B或AB〓型亚稳合金相。

Based on the lattice dynamics with force-constant matrix, we investigated the vibrational properties of GaAs/AlAs superlattice.

主要内容包括：一、采用基于力常数的晶格动力学方法研究了超晶格GaAs/AlAs晶格振动性质。

The effect of solution treatment on microstructure and mechanical properties of 7B04 aluminum alloy were studied by optical microscope,tensile test,X-ray diffraction phase analysis and refinement of lattice parameter of α matrix.

通过显微组织观察、拉伸力学性能测试、XRD衍射物相分析以及α基体点阵常数的测量等方法研究了固溶处理对7B04铝合金组织和性能的影响。

The formation of martensite is accomplished by the immigration of well-defined glissile interface (121)fcc type and its misfit dislocations can produce the lattice invariant deformation on the basis of phenomenal theory of martensitic crystallography, however, LID is retarded slightly after the migration of interphase (121)fcc, i.e.a thin plate-like zone exists without LID in martensite near the well-defined interface. When the temperature reduces to the Ms point, the lattice parameter of austenite matrix is √3/2 times that of the martensite without LID. This critical condition for spontaneous transformation agrees with that the stack fault energy in matrix is less than zero according to Olson and Cohen's nucleation model.

通过模型分析表明：fcc/bcc马氏体形核与长大过程是通过(121)fcc型择优界面推移进行的，界面上的错配位错可以完成马氏体晶体学唯象理论要求的点阵不变变形，但LID要稍滞后于界面迁移，即在马氏体形核与长大过程中推移界面新相一侧存在一未发生LID的新相薄区；当相变温度达到马氏体相变点Ms时，母相奥氏体与这一薄区的晶格常数比为√3/2，这一几何条件和Olson-Cohen形核模型中要求扩展位错层错区界面能γ≤0是等价的。

The results show that the interplanar crystal spacing and lattice index of Al-rich α phase reduce gradually with increasing pressure. When the pressure reaches from common pressure to 5 GPa , Al-rich α phase lies on the (200) and (220) crystal faces, the interplanar crystal spacing are reduced by 1.07% and 1.15%. From common pressure to 3 GPa , the microstructure of ZA27 alloy changes from thick dendrites to fine dendrites, and finally to granular. According to the effect of solute diffusion coefficient under super high pressure and the calculation of Scherrer formula, it can be seen that the crystal organization is fine within the bounds of certain pressure. This conclusion is consistent with the experiment results.

结果表明：随着压力的增加，晶面间距和晶格常数都逐渐减小，当压力达到5 GPa时，富铝α相在(200)与(220)晶面处，晶面间距较常压力时的分别减小1.07%和1.15%；在常压至3 GPa范围内，晶粒由粗大的树枝晶→细小的树枝晶→粒状、椭球状枝晶转变的趋势，通过压力对合金凝固溶质扩散系数的影响结合Scherrer公式计算分析其组织变化原因，得出在一定的压力范围内，随着压力的增大，晶粒尺寸逐渐变小，这一结论与实验结果相符。

You will be able to uses its math constraint to search and develop advanced Linguistic statistics and information on any given layer through 10 layers/latticework of data.

你可以使用它的数学常数在任意给定的10层/格数据中搜索和开发高级的语言统计学和信息。

Through comparison of the results of numerical simulation and experiment results, two equation model was validated with constants recommended by Launder and Spalding in the paper.

采用Launder和Spalding提供的模型常数，通过数值模拟分析结果与实验值的比较确认了两方程κ-ε湍流模型对本实验装置的适用性。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。