查询词典 porous

ABSTRACT The preparation of photoluminescent porous silicon wafer and the seperation of photoluminescent porous silicon films from silicon wafer were reported in this paper.

本文从发光多孔硅的制备出发，通过系统的分析测试，对多孔硅的发光机理进行了探讨。

Using ca pillary rube model of porous media,scaling coefficients of capillary pressure ar e deduced in this paper. The results show that the scaling coefficients, in the same porous medium, if any pair of two-phase (usually air-water two phase syst em is selected as the reference) capillary-saturation relationship is known, then the other two-phase (air-NAPL and NAPL-water) capillary-saturation relations hips can be obtained too.

从而得出对于同一介质中的任意两相流动，只要某两相的毛细压力饱和度关系已知，其它任意两相的关系都可以通过所得出的毛细压力折算系数而得到。

S: porous tuff ; rhyolitic vitric tuff ; porous material ; filter aids ; mineral material ; Quaternary

多孔凝灰岩；流纹质玻屑凝灰岩；多孔材料；助滤剂；矿物材料学；第四纪

In this thesis, the concentration of graphite powder in the liquid nickel sulfamate and current density are chosen as parameters for composite electrodeposition of nickel and graphite powder. In addition, after electrodepositing, the graphite powder is oxidized into carbon dioxide through heating process for obtaining porous structure. Filter devices of various specifications can be made by controlling the hole dimension of the porous structure.

本研究为了制作出多孔洞结构，将在氨基磺酸镍电铸液中以不同的石墨粉浓度及电流密度为参数进行复合电铸，并且经由加热处理使石墨氧化成为二氧化碳以制造出多孔结构，根据这些多孔结构的孔径大小可以获得各种规格的过滤结构元件。

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 relations between the parameters of the saturated porous micropolar theory and those of the corresponding one_phase medium are established by means of the Greetsma theory. It has merits that the physics parameters in our dynamic equations of the saturated porous micropolar medium have a definite physics meaning and are easy to be tested in laboratory.

借鉴Greetsma理论，建立了饱和多孔微极介质弹性本构方程力学参数与相应单相介质弹性参数的相互关系，使饱和多孔微极介质弹性波动方程中的物理参数具有明确的物理意义，易于在试验中确定。

When the porous solid skeleton is approximately taken as a micropolar medium and the fluid in the pores a point medium, the elastic pragmatic wave equations in a saturated porous micropolar medium are obtained from the results of the micropolar theory and those of Biot's pragmatic wave theory.

利用微极理论和Biot波动理论的研究成果，把饱和土中多孔固体骨架部分近似地视为微极介质，孔隙中的流体部分视为质点介质，获得饱和多孔微极介质的弹性波动方程。

The results showed porous silicon exhibited the electrode with porous structure in the more position potential and analogized a plate electrode at the more negative potential.

在氧化还原电位较正的〓S〓O〓和H〓O〓电解液中，在阴极极化时氧化剂向多孔硅价带注入了空穴导致多孔硅产生电致发光。

The natural polymer porous scaffolds can be prepared by vacuum drying at the temperature over freezing point of the solvent, and the processing time of scaffolds can be reduced obviously. It can be consumed much less time and energy than former freezing-drying process. Though the porous scaffolds fabricated by this method could come into being some crazes and collapse sometimes, the process still requires improving further.

在比冰点高的温度下对冷冻的样品进行真空干燥，可以制得多孔支架，并能使制备的时间大大缩短，但该工艺方案有时会产生开裂和塌陷，影响支架的质量，因此还有待进一步完善。

Although the extent of porous coating necessary remains somewhat controersial, most agree that porous coating should be circumferential at its proximal extent.

尽管多孔表面的必需范围在一定程度上仍有争论，但多数认为多孔表面在柄的近端应环绕一周。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。