symmetrical astigmatism

With the methods of Navier-Stokes equation and the symmetrical mirror image, the numerical simulation is carried out about the three-dimensional fluent field produced by the low-level wind shear nearby airports; According to the computational results, the prediction about the location and the intensity of the wind shear can be made out.

分别采用Navier＿Stokes方程和镜像对称的方法,对机场区域附近发生低空风切变时所形成的三维流场进行了数值模拟;并根据结果对风切变发生的位置和强度提供有效的预测。

convertible unsymmetrical anastigmat

可变换的非对称消像散镜组

air-spaced double anastigmat

双分离对称消像散镜头

asymmetric anastigmat

非对称性消像散透镜

symmetrical (achromat)lens

对称式(消色差)透镜

Free from astigmatism.Used of a compound lens in which the separate components compensate for the astigmatic effects of each lens.

消像散的消像散的，用于复合透镜，其中分隔部分抵消了每一个透镜的散光效果

Finally,it can detect bilateral symmetry,rotational symmetry,curve symmetry and others.

可以同时检测镜像对称、旋转对称、曲线对称等多种对称性.

The Effects of Astigmatic Lens on the Focal Switch of the H-G Beams

透镜的像散对H-G光束的焦开关影响

Properties of 1D Three Element Photonic Crystal with Two Mirror Symmetrical Defect Layer at the Two Ports

两端镜像对称缺陷三元光子晶体的特性研究

symmetrical design

﹝镜头﹞对称式设计

Diagonal Mirror-Transfer in Perceptual Learning of Orientation Discrimination;

光栅朝向分辨学习中存在关于45°对角线对称的镜像迁移

Anastigmatic lens: Photographic lens corrected for astigmatism as well as other distortions. Process camera lenses are anastigmats.

消像差透镜:消除纵横像差和其他畸变的摄影用透镜。制版照相机所用的镜头是消像差透镜。

Studies on Racemization and Asymmetric Transformation of L-Histidine and L-Proline;

L-组氨酸和L-脯氨酸消旋和不对称转换的研究

Bilateral symmetry The arrangement of parts in fan organism in such a way that the structure can only be divided into similar halves (mirror images) along one plane.

左右对称：通过中央轴，只有一个对称面将生物体分成左右相等的两部分（镜像）。

" Racemate: Mixture of equal quantities of two enantiomers, substances whose molecular structures are mirror images of one another."

外消旋体: 两种分子结构互为镜像的对映体的等量混合物。

Loss of asymmetry and normal structure within the white matter fiber tracts in schizophrenia:a diffusion tensor imaging study

精神分裂症脑白质不对称性及完整性MR弥散张量成像研究

It was emphatically elaborated structural difference and quick diffusion component in unsymmetric diffusion couples influence on the amorphization of metal multilayered films.

着重阐述了组元结构差异以及不对称扩散偶中快扩散组元对固相反应的影响。

She looked in the mirror and automatically pushed up loose strands of hair but she did not see her own reflection.

她对着镜子机械地理了理几绺松散的头发，但好像并没有看见自己的影像。

The Application of Discrete Complex Image Theory in the Electromagnetic Scattering Problems;

离散复镜像理论在电磁散射中的应用与研究