孔径

In this paper, a new method, pre-crosslinking control method, has been developed for controlling the pore structure of carbon membrane. By this method, the pore structure of carbon membrane was controlled by adjusting the fusibility of resin through varying the hexamine content used in the pre-crosslinking treatment.

在实验过程中，发现了一种调控微滤炭膜孔径的新方法，即通过改变预固化过程中六次甲基四胺的用量来控制预固化程度，从而改变成膜树脂粒子在炭化过程中的熔融特性，实现对炭膜孔径的调控，同时影响炭膜强度。

The way of calculating the pore-size distribution was improved to avoid the complexity of graphical solution in the gas flow method.

气体流速法表征可以测量通孔的有效孔径，改进该方法的孔径分布计算方法，克服以往图解法的繁杂，同时考虑了测量中气体的膨胀效应，使计算便捷准确。

The ordered mesoporous material MCM-41 was synthesized by a hydrothermal method using fumed silica,sodium hydroxide/tetraethyl ammonium hydroxide/hydrogen chlorideand cetyl trimethl ammonium bromide.

用X射线衍射、氮气吸附-脱附等手段对比分析了合成的3种MCM-41介孔材料的物相、比表面积、孔径、孔体积等，发现酸性介质中合成的介孔材料的孔径最大。

Solid immersion lens was employed to increase the optical writing density. The position of foci and numerical aperture of the focusing system with SIL were simulated, and the threedimensional optical data storage was conducted.

为进一步提高光存储密度，利用固体侵没透镜与数值孔径为0.55的长工作距离物镜对飞秒激光脉冲进行聚焦，完成了PMMA及石英介质上的存储实验，并对聚焦物镜焦点与SIL底面离焦时的介质内焦点位置和系统的数值孔径进行了模拟。

The results show that the total acid amount changed indistinctively and strong acid sites increased relatively if the treated temperature was not higher than 400 ℃ even in two different treated media. However, the total acid amount decreased obviously and strong acid sites nearly disappeared as the treated temperature was beyond 500 ℃, and the second pore with different pore sizes formed and average pore diameter enlarged of MCM-22 zeolite catalysts after hydrothermal treatment.

研究结果表明，在两种不同介质中和处理温度不高于400 ℃条件下，催化剂的总酸量变化不大，强酸中心有所增加；处理温度高于500 ℃后，催化剂的总酸量明显下降，强酸中心基本消失；经水热处理后， MCM-22分子筛催化剂中形成了孔径不均匀的二次孔，平均孔径增大。

The class one which was expressed by diameters of pore maximum inscribed circle was adapted and a new distribution model expressed by diameters of pore area equivalent circle modified with fiber thickness was presented.

以几何概率和平面随机分割理论为依据，分析了非织造布中孔隙结构的分布模型，将经典的以内按圆直径表示的有效孔径分布模型改为以面积等效圆直径表示的有效孔径分布模型，并结合纤维细度进行修正，实验证明，该模型更符合实际情况。

Based on the traits of the aspherical lens, the sunlight was focused on a very small spot, and then it was transferred into a plastic fiber by an aspherical lens and a selfoc lens. A formula for calculating the optimal length of selfoc lens is presented. The optimal assembly of the aspherical lens and selfoc lens was implemented by the aid of this formula. Therefore, sunlight is coupled into a plastic fiber efficiently.

根据非球面透镜垂轴球差小的特点把太阳光会聚到很小的光点，再利用长度约为1/4节距的自聚焦透镜改变光线的数值孔径使其满足光纤的数值孔径，通过一个计算公式来计算最佳的自聚焦透镜长度，实现非球面透镜和自聚焦透镜的最佳组合，把太阳光以较高的耦合效率耦合进塑料光纤。

As to pore size of HA, 100μm and 300μm pore size of BMP/HA appear to show much more bone formation than larger pore sizes of HA, BMP/HA can effectively promote HA in corporation with base bone, specd and add new bone formation and contents of calcium and phosphonium on the bone-implant interface.

就材料孔径大小而言，100-300Hm的孔径更适宜骨组织长入，并更能发挥BMP的诱导效能，HA/bBMP能增加材料与骨界面新骨形成速度和数量，早期即可获得钙化较高的骨性结合。

The small dipole aperture antenna provides a normal way for THz radiation, for which the Drude-Lorentz theory provides method to calculate the Terahertz waves from photoconductor.

但是传统的Drude-Lorentz方法只是适用于小孔径(孔径，这里指的是偏置电压两个电极之间的距离)光导天线。

This paper has introduced the process of producing open cell polyurethane foam,and particularly discussed the effect of the different types and quantities of polyalcohol, catalysts, and surfactants impact on foam aperture, and analyzed the influences factors of foam reaction.

介绍了大孔径网状聚氨酯泡沫塑料的制备工艺，着重讨论了多元醇种类及不同用量的催化剂、表面活性剂对泡沫孔径和经络的影响，分析了影响发泡反应的多种因素。

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