查询词典 symmetric

The influencing factor of a reflective rotationally symmetric optical interface is defined.An example is presented to be analyzed.

实例分析结果表明，对于具有宽光谱、大入射角、大视场等特点的反射式旋转对称光学系统，要想提高其光学系统的性能，必须控制光学系统的偏振像差。

The polarization aberrations of an optical system were analyzed to control the polarization effects and to improve the optical performance of the transmitting rotationally symmetric optical systems.

为了控制透射式旋转对称光学系统中的偏振效应，提高系统的光学性能，对该系统中的偏振像差进行了分析。

Using object oriented programming technique and visual C＋＋ language, an AD package was developed, which can be used to calculate the third order aberrations of rotationally symmetric systems.

利用面向对象的编程技术，在VC ＋＋环境中编制了一个软件包，该软件包能够简洁且准确地计算旋转对称系统的3阶像差。

Then,the factors affecting the polarization aberrations were analyzed and the affecting factor of a transmitting rotationally symmetric optical interface was defined.

对影响偏振像差的因素进行了分析，提出了透射式旋转对称光学界面产生的偏振像差的影响因子。

To summarize, we successfully to find the way to reduce the backscattering of the rotationally symmetric conducting target by cutting slots filled with anisotropic media.

以上现象和结论对于此类飞行体的隐身分析和设计具有一定的参考价值。

Next, we present a method of designing a rotationally symmetric superresolving four-zone plate for dual wavelengths. The system performance of the design is shown in this thesis, with discussions in details.

接著，我们提出一个具有四个环带的滤波片之设计，用於使光学系统在两个不同的波长下，能同时达到超越绕射极限的效果。

The electronic structures of cluster Fe8 with D6h symmetry and Fe15 with Oh sysmmetry have been studied by MS-X method..The results show that(1 the exchange splittings of the d-band and the magnetic moments of the Fe-atoms are different in the two clusters;(2)the change distribution in both clusters is not uniform,showing that the electrons are transferred from peripheral atoms to inner atoms,and the spin-directionof the electrons transferred is in accordance with the symmetric characteristics...

用MS-Xα方法研究了Fe8原子簇（具有D6h对称）和Fe15原子簇的电子结构，结果表明：（1）两种原子簇中的Fe原子磁矩及其d能带中的交换劈裂性质互不相同；（2）两类原子簇中的电荷分布不是均匀的，电荷倾向于从外围原子向内部原子上转移，并且被转移电子的自旋方向与原子簇的对称性质密切相关。

We proved, under a geometric condition given by Capietto, Mawhin and Zanolin, the infinity and some dense distribution of even or odd symmetric subharmonics for the equation with oscillatory nonlinearity.

本文讨论了具有偶或奇对称性的Duffing方程，在由Capietto，Mawhin和Zanolin给出的几何条件下，我们证明了具有振动非线性的对称Duffing方程有无穷多个对称的次调和解，并且其次调和解具有某种稠密的分布。

By means of the switchable symmetric shortcut, a controllable inductance step can be provided.

通过可开关的对称短路，可以提供可控制的电感步长。

The discrete-element modeling is a new dynamic modeling method in structural geology and geophysics research. The authors built a discrete element model to simulate the evolution of the fault system in active salt domes. Results show that the fault system undergoes three stages: symmetric deformation stage, asymmetric deformation stage, and complete fracture stage.

离散元模拟是构造地质地球物理研究中一种新的动力学模拟方法，作者通过构建离散元模型，模拟了主动底辟盐构造断裂系统的演化过程，结果表明，该断裂系统的发育主要经历了对称变形、不对称变形、整体破裂三个阶段。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。