查询词典 symmetry

PMMA compound X-ray lenses are composed of a group of 40 plano-concave elementary lenses positioned in line with axial symmetry.

用LIGA技术中的软 X射线光刻方法制作了PMMA材料 X射线组合透镜。

The latest experimental results of the focusing perfermance of the compound high-energy X-ray lens is designed with PMMA with the parameters of 40 plano-concave elementary lenses positioned in line with axial symmetry, 200 μm radius of the concave surface, 0.15 nm working wavelength, 0.5 mm geometrical aperture and 8 mm length of the compound lens and 1.3 m focus length, are briefly introduced.

报道了这种新型X射线光学元件聚焦性能的最新实验结果。设计的高能X射线组合透镜为聚甲基丙烯酸甲酯材料，包括40个相同的、顺序排布的平凹折射单元，折射单元的球面半径为200 μm，组合透镜的几何口径约为500 μm，长度约为8 mm，焦距约为1.3 m。简要描述了PMMA材料X射线组合透镜的制作技术和制作过程。并给出了X射线组合透镜聚焦性能测试实验系统和实验条件。

This study is to experiment the symmetry of graphic formation in the plastic operation.

本实验研究之主旨在探讨人在造形活动中有关平面构成之对称性研究。

It is proved that -1 couldnt be the eigenvalue of Jacobian matrix of Poincare map at .fixed point by the analysis of the symmetry of.

对于单自由度双面碰撞振子，通过分析Poincare映射的对称性，证明了不动点不存在-1的特征根。

Secondly, there are the clusters with clear 7 fold symmetry and transformation point at lower temperature in liquid metals.

二是发现液态金属中存在着明显的7度对称性原子团和低温端相变点。

Smooth command: Did not maintain symmetry of control point smoothing. This is fixed.

智慧轨迹：修正视图范围外的智慧点无法正确计算的错误。

Consequently, that symmetry point of T-square apex replaces ...

因此，T角顶点的对称点就取代了T角的全部能量，也就是说，你只需要考虑这个对称点的影响。

In the process of rotation, three different symmetry point groups D2h, D2d, and D2 were considered.

考虑到此过程中经历不同状态所属的对称点群，即D2h、D2d与D2。

By mesh point's symmetry,.it is improved effectively the numerical accuracy and computational stablity.

该算法网格点数少、步长均匀一致，根据格点间的对称性，减少了计算机资源的存储量。

The design uses the resource of FPGA efficiently due to explore the symmetry of point spreat function.

实验结果表明，该电路具有较高的吞吐率和较强的计算能力。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。