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。
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.
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
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
convertible unsymmetrical anastigmat
可变换的非对称消像散镜组
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
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）。
symmetrical (achromat)lens
对称式(消色差)透镜
The property that distinguishes an asymmetric from its mirror image but not from a rotated object.
旋向性一种从一个物体的镜像而不是从转动的物体中分辨其不对称性的特点
The Imagine in the Mirror--One of the explanations of Shuting s "the song to the oak";
镜像之像——对舒婷《致橡树》的一种解读
Appellation as a mirrior-image of social and cultural psychology--A comparative study of the Chinese and English appellations
称谓:社会文化心理的镜象——英汉称谓系统的对比
image frequency
像频;镜频;镜频;镜像频率;镜像频率;帧频
The important thing to know that it has an axis of symmetry - the optical axis.
重点是知道主镜有一个对称轴——光轴。
Guarantee Measure of Symmetry Degree when Processing the Square Lens Parts
加工方形透镜零件时对称度保证措施
The greater the number of diffracted orders that gain admittance to the objective, the more accurately the image will represent the original object.
进入物镜的衍射级越大，其物镜所成像对物体再现的像的精度越高。
Invisible Symmetry--Analysis of the Animal Pattern Structure on Bronze Mirror;
隐藏的对称——对铜镜图案中动物形象结构的分析
The glasses are called adaptive glasses.
这种眼镜称作矫视镜，