diffraction symmetry

A principle for determining the orientation of [001] crystal direction of Ni-based single crystal superalloy has been explained by asymmetrical X-ray diffraction technique in common diffractometers.

论述了在普通的多晶衍射仪上,利用固定2θ角,进行Omega扫描的非对称X射线衍射方法来测定Ni基单晶高温合金[001]取向的原理,对三个具有不同取向角度的Ni基单晶高温合金进行了取向测定,讨论了该方法可测试的单晶体偏差角的范围和进一步扩大测试范围的可能解决方法,以及测试中应注意的问题。

By the reflection group, the eigenvalues and eigenfunctions of Lapalician with Dirichlet boundary condition are derived for six kinds of special triangles.

应用反射对称性,得到了六种满足Dirichlet边界条件三角形上拉普拉斯算子的本征值和本征函数。

A pure quantum mechanics theory of SPE based on mirror reflection symmetry is given and compared with SPE caused by second symmetry around z axis.

具有绕z轴的M重对称性和时间反演对称性系统的哈密顿量可以导致自旋宇称效应 ,给出了源于镜面反射对称性的自旋宇称效应的纯量子力学理论 ,并与源于绕z轴二重对称性导致的自旋宇称效应作了比较。