孔径

Hence only parallel rays are able to pass through this aperture and therefore as the reflecting object seems to be infinitely remote, there can be no perspective distortion and also magnification is independent of the distance to the lens.

因此，只有平行光线能够通过此孔径，因此，作为反映的对象，似乎是无限遥远，不可能有任何角度的扭曲和放大，也独立于距离镜头。

Nanoporous TiO〓-based photocatalysts with near textural structure and narrow porous distribution were synthesized by sol-gel route combining with controlling gel peptization and suitable preparation conditions.

将Sol-Gel过程与控制凝胶的胶溶和适当的制备条件相结合，合成了表面结构相近、窄孔径分布的纳米孔道TiO〓基光催化剂。

Aluminum Ispropoxide was hydrolyzed to prepare Al〓O〓 sol. The hydrolyzed 〓CHOH affected the sol peptization. The colloidal particle was the smallest when the peptization time was 12 hours.γ-Al〓O〓 membrane without cracks, thickness about 2μm, was prepared from 1M sol with a suitable amount of PVA solution. The mean pore size of the membrane was about 3nm. And, the H〓/N〓 separation factor was 3. 53, exhibiting good separation performance.

异丙醇铝为前驱体，水解制备Al〓O〓溶胶，水解产生的异丙醇影响溶胶的胶溶效果，并且胶溶12小时得到的胶粒最小。1M溶胶加PVA制备厚度2μm左右，无开裂γ-Al〓O〓膜，经600℃煅烧，平均孔径为3nm，H〓/N〓分离系数可达到3.53，表现了很好的分离性能。

A novel algorithm for InSAR SLC coregistration is proposed. The averaged periodogram is used as evaluation function of registration in the new algorithm and the estimation variance of evaluation function is reduced by separating the data into numbers of subsections and averaging them, thus the accuracy and reliability of registration is improved.

提出了一种新的干涉合成孔径雷达复图像配准算法，新算法使用干涉相位图的平均周期图作为配准的评价测度函数，采用数据分段求平均的方法降低了评价函数的估计方差，从而提高了配准的精度与可靠性。

A lab test apparatus was developed into evaluating the noise reduction of the porous cement concrete. A constant head permeameter was developed to ascertain the water permeability of porous cement concrete, the influence of the porosity and pore size on the water permeability was studied.

另外，对多孔水泥混凝土的透水性能进行了研究，通过建立有效孔隙率、孔径大小与渗透系数的关系，结合其实际透水性能，得出了满足一般排水性路面排水要求的有效孔隙率范围和级配。

It is very important for estimating the size of photodetector aperture to calculate the Gauss-Laguerre correlation functions.

我们应用Bartelt和Freude等人l'，【51提出的光纤中模式分析测量的新方法—用计算全息产生的光学匹配滤波器对光纤中的模式进行分析测量，需要知道Gauss一Laguerre函数的卷积表达式，以此来估算测量时所有光电检测管的孔径大小，估计测量结果的精度，减小测量误差。

In this paper, an experiment was performed on a new type microlens array, which has extreme high fill-factor (almost 100%), for the first time to our knowledge. In the microfabrication process, photolithography photoetching method and ion-exchanging technology were introduced and investigated for the special glass substrate.

本文首次制备出一种新型的平面微透镜阵列-方形孔径平面微透镜阵列，该类器件经理论分析具有极高填充系数，可以说近达100％。

According to the demand of high data density of IC devices,higher photolithography resolution is required.

随着IC集成度的提高，要求越来越高的光刻分辨力，但光学光刻的分辨极限受光刻物镜数值孔径和曝光波长的限制。

The data are taken at 5 Hz, and aperture photometry was completed for stars down to ~13.7 mag.

资料取样频率为5 Hz，孔径测光可至星等约为13.7等的背景恒星。

In fine mesh bags the anabolism of microorganisms could assimilate N from outside of bags and even partly offset the effect of physical and chemical decay, such as leaching.

微孔径袋内由于排除了大中型土壤动物的作用，微生物的同化作用将凋落物袋外环境中的N元素等物质吸收到袋内凋落物中，甚至还可能部分抵消了气候因素导致的物理、化学腐解作用，如淋溶等。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。