多孔的

The results show that the optimal amount of foamer is 0.5 wt％and thisporous material has excellent porous structure, that is, interconnected and uniformlydistributed pores with the diameter of pores ranging from about 100μm to 700μm.

结果发现：发泡剂的最佳比例为0.5 wt％，多孔n-HA／PA6材料具有与松质骨相似的多孔结构，孔径为100～700μm，孔的贯通性好，孔隙率可通过调节工艺参数进行控制，最高可达到88.6％；总孔隙率相近的情况下，n-HA含量高的多孔材料的压缩强度较高；孔隙率在58～88％范围内，多孔材料的抗压强度在1.1～15.6MPa，与人松质骨的抗压强度相当。

Methods: The PP/porous PTFE/PP composite electret film was prepared with porous PTFE,polyethylene and PP by heat melting technique.The charge storage stability of the electret film and transportation were evaluated by using the methods of isothermal surface potential attenuation and open-circuit thermally stimulated discharge current spectra.

利用热融法将多孔PTFE、聚乙烯和PP制备成PP/多孔PTFE/PP复合膜驻极体，利用等效表面电位衰减和开路热刺激放电电流谱方法研究PP/多孔PTFE/PP驻极体的电荷储存稳定性及其输运规律。

Methods: The PP/porous PTFE/PP composite electret film was prepared with porous PTF'E, polyethylene and PP by heat melting technique. The charge storage stability of the electret film and transportation were evaluated by using the methods of isothermal surface potential attenuation and open-circuit thermally stimulated discharge current spectra.

利用热融法将多孔FTFE、聚乙烯和PP制备成PP/多孔PTFE/PP复合膜驻极体，利用等效表面电位衰减和开路热刺激放电电流谱方法研究PP/多孔PTFE/PP驻极体的电荷储存稳定性及其输运规律。

The results show that the porosity of porous silicon increased with the increase of etched time, which lead to the decrease of minority carrier life and the increase of luminescent efficiency of porous silicon.

多孔硅的空隙度随腐蚀时间的延长而增大，这也导致了多孔硅的少子寿命的降低，从而造成多孔硅的光致发光效率随多孔硅空隙度的增大以及少子寿命的降低而提高。

The surface morphology of the porous silicon samples was observed by the field emission scanning electron microscopy and the atom force microscopy and microwave photo-conductance decay technique was first used to measure the minority carrier lifetime of PS.

结果表明，多孔硅的发光来自与氧空位有关的缺陷，而多孔硅表面的氢原子能够钝化多孔硅表面的非辐射中心从而提高多孔硅的发光效率。

According to the configuration of porous ceramics, there are two kinds of means to make porous ceramics by preceramic polymer pyrolysis, namely bulk structure porous ceramics and ceramic foams.

根据所得多孔陶瓷的形态，先驱体转化法制备多孔陶瓷大致可分为两类：制备本征结构的多孔陶瓷，制备泡沫陶瓷。

In this paper, material properties of the segment of the porous metal-bonded diamond grinding wheel were researched by finite element simulation. Segments were manufactured according to the design result and their elastic modulus was measured. The key points are as follows: The influence of the porosity on the elastic modulus was analyzed through a finite element method. In the FEM model, the design variable only includes the porosity, and the tetrakaidecahedron model is applied as the microstructure model of porous metal matrix. The corresponding porosity was decided in order to meet the requirement of the elastic modulus.

本文利用有限元软件对多孔金属结合剂金刚石砂轮节块的材料性能进行了数值模拟计算，依设计结果制备了节块试样，并测试了节块的弹性模量，主要内容有： 1、充分借鉴多孔材料结构设计和分析的方法，以十四面体模型为多孔金属胎体的微观结构模型，以孔隙率为设计变量，通过有限元分析，计算出满足一定弹性模量要求的多孔金属胎体的孔隙率范围。

The surface state and electrochemistry properly platinum-plated on open-cell foamed titanium electrode was investigated and he compared with IrTi anode and platinum-plated titanium toil cathode. The results show that open-cell foamed titanium can uniformly coat with excellent bonding strength platinum-plated, thickness coating 2 μm. The cathode release hydrogen voltage of platinum-plated on open-cell loamed titanium electrode is fall. The anode release oxygen voltage of platinum-plated on open-cell foamed titanium electrode is higher than Irli anode in high current.

采用电镀技术在多孔钛表面沉积了均匀的铂金属层，分析了多孔钛镀铂后的表面状态及电化学性能，并与IrTi涂层阳极及镀铂钛网阴极进行比较，结果显示：多孔钛板开孔孔隙表面可均匀沉积结合力良好的铂层，镀层厚度为2μm；镀铂多孔钛阴极析氢电位比镀铂钛网高，且在大电流下，阳极析氧电位比IrTi涂层阳极高。

Finally, the parameters, such as density, thickness of porous media, thickness of steel of each material in air and porosity, pore size, thickness of porous materials, thickness of steel and incident angles in water were investigated and also the influence on the sound absorption and insulation were discussed.

最后，分别就空气中以及水中的材料参数，分门别类的观察其对吸音与隔音的影响。在空气中所讨论的参数，有多孔材密度、多孔材厚度、钢材厚度。在水中所讨论的参数，有多孔材孔隙率、孔隙尺寸、多孔材厚度、钢材厚度、声波入射角度。

The following results are got:(1) the analytical equation between the overburden pressure, the pore fluid pressure and the matrix stress is established;(2) the nonlinear relation between the porosity of saturated soils and the pore fluid pressure are obtained, which relates to the initial state and the initial pore pressure of saturated soils;(3) Based on the new principle, the rock shear strength theory and hydraulic fracturing pressure formulation are reacquired, which are much more reasonable than the traditional ones.

笔者在第一章中提出，在建立多孔介质的有效应力原理时，必须考虑其细观结构，并解析推导出了基于多孔介质之上的饱和多孔介质有效应力原理。该原理包含了孔隙度φ这一表征多孔介质结构性的重要参数；并体现了孔隙流体与固体骨架对总应力的分担作用，分担比例为φ：（1-φ）。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。