查询词典 angular aperture

Based on the expression of diffractive field distribution of the Gaussian beams restricted by a rectangular aperture and focalized by a lens,the relationship between the width of the rectangular aperture and the spot size of the restricted beam,as well as the relationship between the aperture width and the power in the bucket,was numerically calculated with MATLAB.

为了研究矩形光阑边长与透镜像方焦面处光束光斑尺寸以及光斑内所包含功率的关系，根据高斯光束经矩形光阑和透镜变换后在透镜像方焦面的衍射场分布表达式，采用MATLAB进行数值计算的方法，进行了理论分析。

The first is termed aero-optic and involved optical transmission through aberrating fluid layer whose thickness, L, is smaller than or comparable with the viewing aperture dimension, A, and the turbulence scales, A , are smaller than or the order as the layers thickness:The second category, atmospheric propagation, involved optical transmission through the aberrating medium over very long propagation distance compare with the viewing aperture size, and the turbulent scales of note are generally less than or the same order as the propagation distance:Depending on the atmospheric conditions, for ground-based observatories, wave-front sensor operating at 300HZ can adequately resolved both the important spatial scales and the temporal evolution of the atmospheric-turbulence-induced aberrating wave front over viewing aperture associated with relatively large telescope.

第一类问题光学畸变发生在&近场&较短的光路上，即流层厚度L，光束直径A，以及湍流尺度Λ三者之间存在关系式：ΛA≤L≤A第二类大气传输问题光学畸变则发生在较长的一段光路上，L，A，以及Λ满足： A＜＜Λ≤L对于地基情况下的大气光学传输，300Hz的波前传感器就能实时地测得光波前畸变包括时间、空间频率的相关信息，为我们的自适应光学系统的设计、制造以及进行相关的自适应校正都有着相当重要的指导意义。

When the receiving aperture is much larger than the scattering disk scale, the aperture-smooth effect is remarkable and the derived variance approximates the result given by weak-fluctuation theory for any zenith; when the receiving aperture is much smaller than the scattering disk scale, the low-pass filter effect of the scattering disk scale is dominating and weak-fluctuation theory is valid only for small zeniths.

散射盘尺度和接收孔径对到达角起伏起平滑作用，当接收孔径远大于散射盘尺度时，由于孔径平滑作用，导出的表达式在任意天顶角都可以近似为弱起伏理论给出的结果；当接收孔径小于散射盘尺度时，散射盘尺度的平滑作用明显，接收孔径的平滑作用相对较小，传统的到达角起伏理论仅在小天顶角是适用的，在大天顶角必须用新导出的方差表达式。

It has some prominent merits compared with ordinary prismatic elements: AOTF is small and light, its structure is solid without moving parts, both the clear aperture and the incident angular aperture are big, high diffraction efficiency, it can be tuned neatly and fast in the wide field.

同时具备空间分辨能力和光谱分辨能力的光谱成像技术是图像分析技术与光谱分析技术的完美结合。

B Angular momentum is a vector quantity as are also angular velocity, angular acceleration and torque.

角动量是个矢量，角速度和角加速和转矩也都是矢量。

Angular momentum is a vector quantity as are also angular velocity, angular acceleration and torque.

角动量是个矢量，角速度和角加速和转矩也都是矢量。

The positions of cam and dial were analyzed accompanied with their angular position, angular velocity and angular acceleration.

分析了凸轮和转盘的位置、角速度、角加速度的变化规律，给出了直角式精密分度凸轮的设计算法，同时计算了数控加工的刀位轨迹，并给出了四坐标联动数控加工和编程方法。

First, a program which can be used to obtain the encoder values of each joint D. C. servomotor and then change them into angular position is developed. By means of cubic spline, the angular velocity and angular acceleration are calculated.

本文开发了实时采集和转换机器人各关节的码盘值为角位移的程序，并提出了以三次样条函数求各关节角速度和角加速度的方法，提高了计算精度。

The Von Mises angular function is used to describe the angular correlation for the distributed source and derive a novel distributed source model from the quantitative angular correlation.

利用阵列接收信号协方差阵的特征值分析了源内角度相关程度对有效信号子空间的影响。

Correlation between spin angular momentum s and background angular momentums of planets;2. In the paper the principle of optical rotation due to the transfer of spin angular momentum from light to particles was discussed by analyzing the interaction between the beam of light and birefringent crystal particles, and then an optical tweezers was formed on nanometer optical tweezers system with a linearly polarized light beam (He-Ne laser 633 nm, 10 mW).

从理论上分析了偏振光束与双折射晶体粒子的相互作用过程，讨论了由于光束自旋角动量向晶体粒子的传递所导致的光致旋转效应的原理，并在纳米光镊装置上利用线偏振He Ne激光器(633 nm，10 mW)形成了光镊光阱，利用1/4波片来改变光镊光束的偏振状态，在不同的椭圆偏振状态下实现了直径约为几微米的CaCO3 晶体微粒的捕获和光致转动。

Don not attempt to do something which you can not to do.

不要企图做那些办不到的事情。

The expression of CTGF and TNF-αweredetected by immunochemistry and the number of Clara Cells was calculated.

光镜下观察肺组织的病理变化，采用免疫组化染色观察肺组织中结缔组织生长因子和肿瘤坏死因子-α的表达和Clara细胞的数量。