孔径尺寸

The design of four-mirror anastigmat was analyzed, then a system with effective focal length of 1 200 mm and field of view of 0.8°×0.8° was designed , total length and f-number are 300 mm and F/6,respectively.The system has advantages of long focal length, relative short physical size and excellent ability in restraining stray lights.

分析了离轴四反的设计步骤，设计了一个焦距为1 200 mm，视场为0.8°×0.8°，相对孔径为F/6的光学系统，系统总长只有300 mm，并达到很好的光学性能，具有长焦距、小尺寸、良好的杂散光抑制能力等特点。

We adopt chemosynthesis and template assembly choosing different templates and different approach to change the sizes and structures of nano-micron porous materials and realize the regulation of new materials'' structures and physical properties, hunting the feasibility and application foreground of composing devices.

我们采用化学合成的方法，用模板组装的技术，选择不同的模板及不同的合成路线，改变纳、微孔径的尺寸和孔结构，实现新材料结构与物性的调控，探求组成器件的可行性及应用前景。

One or both of transmit and receive aperture controls may include preventing some element of the transducer array from transmitting or receiving, calculating weighting apodizations to combine with standard apodizations for each frame, or determining an aperture size based on an f-number for the transducer array for each frame.

发射和接收孔径控制中的一个或二者可以包括：阻止换能器阵列中的某个元件进行发射或接收，针对每一帧计算加权变迹以将其和标准变迹相组合，或者针对每一帧根据换能器阵列的F数来确定孔径尺寸。

Phase structure function and aperture-averaged slope correlation function with finite outer scale are derived.

导出了有限外尺度影响下的相位结构函数和孔径平均的斜率相关函数的表达式，结果表明有限的大气外尺度对大气湍流统计特征的测量有很大的影响，尤其对大尺寸的望远镜和子孔径更是如此。

On the basis of the Darcy formula and the Cantor equation, the impact of the aperture size of concrete to its impermeability was discussed.

根据Darcy公式和Cantor方程，研究了混凝土孔径尺寸对其抗渗性的影响。

On the basis of the Darcy formula and the Cantor equation,the impact of the aperture size of concrete of its impermeability was discussed.

根据Darcy公式和Cantor方程，研究了混凝土孔径尺寸对其抗渗性的影响。

Since zeolite has regular porous structure with uniform pore size distribution, the membrane can realize the separation in molecular level. Therefore, the research and exploring of zeolite membrane are of the potential significance for industrial application.

由于分子筛具有分布单一的规整孔道，其孔径尺寸处于微孔范围内，由分子筛构成的分子筛膜有望实现分子水平上混合物的分离，因此，研究和探索分子筛膜对于其工业应用具有重要的意义。

Based on the boiler structure and operation data, the simulation results of the software is discussed in detail, and the reason of the heat difference in water wall tubes of the boiler is find out, which is the ruin or wear and tear of inlet throttles.

计算结果表明，原设计的节流圈孔径尺寸分布是合理的，水冷壁管产生热偏差的主要原因是节流圈磨损和损坏造成的。

The simulation model consists of a sub-wavelength aperture and a metal-coated fiber probe scanning in constant height mode. Influences of the scanning height and the aperture size of the fiber probe on optical field detection are discussed.

选择纳米孔径的隐失场光场和镀金属膜光纤探针建立了近场光探测的理论模型，讨论了探针孔径尺寸、扫描高度等因素对光场探测的影响，以及测量光场与初始光场之间的关系等。

The stress distribution on the cross section of geotextile with a circle or an ellipse or a square hole under uniaxial tension or double-axial tension was calculated with boundary element method program. The results show that the stress concentration appear at the range from the hole side to about 3 times of the hole diameter, and the degree of stress concentration near the hole is related to the shape of the hole, the size of the hole, the position of the hole and the dimension of the specimen.

用边界元法程序分别对开有圆孔或椭圆孔或方孔的土工织物试样在单向与双向拉伸时孔截面上的应力分布情况进行了计算与分析，结果表明：土工织物孔截面上的应力集中出现在距孔边3倍左右的孔径尺寸范围内；孔边附近应力集中的程度与孔的形状、大小、位置及试样的尺寸有关。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了