porosities的例句大全

However, it is easy to form porosities during traditional die casting because of its wide solidification temperature interval.

但是其凝固温度范围宽，在传统压铸生产时容易形成缩松。

Porous silicon layers of different thickness and porosities are obtained using anodization method via controlling the hydrofluoric acid concentration, current density and time. The thick porous silicon layers are oxidized by a two-step oxidation method.

实验过程中通过控制阳极氧化反应中HF溶液的浓度、电流密度和反应时间形成了不同厚度和孔隙度的多孔硅厚膜，并采用两步氧化的方法得到氧化多孔硅厚膜。

CO 2 gas was used as the shielding gas to eliminate porosities in deep penetration laser welding of low carbon steel in this paper.

采用CO2作为保护气体消除大熔深激光焊接低碳钢时易发生的气孔问题，并对比研究了CO2和Ar气保护条件下12mm厚低碳钢板激光焊缝的组织和韧性。

Using Different Logging Apparent Porosities to Distinguish Carbon Dioxide from Methane

利用测井视孔隙度差异识别二氧化碳和烃类气

In this paper, the effect of HIP on the porosities and properties of two spray formed superalloys, K17 and GH742, has been investigated.

研究了热等静压工艺对喷射成形K17和GH742两种高温合金显微疏松和室温拉伸性能的影响。

Application of extended time average equation in the prediction of porosities of clastic reservoir rocks

扩展时间平均方程在碎屑岩储层孔隙度预测中的应用

The extended time average equation, a combined model introduced in this paper, can predict the porosities of muddy sand reservoirs only by absolute seismic velocities before exploratory drilling, and provide reliable quatitative information for an integrated evaluation of clastic reservoir quality.

本文提出的扩展时间平均方程组合模型，能够在钻井之前仅根据地震绝对速度，预测出泥质砂岩储层的孔隙度，为储层性能的综合评价提供有力的依据。

When castings solidify as a sequence manner and squeeze force effectively acts on the surface of the liquid metal, the shrinkage porosities in the castings are eliminated and mechanical properties are increased obviously.

采取措施使铸件以顺序方式凝固，并使挤压力有效地作用在液体金属上，可以消除大高径比铸件内的缩松，获得高力学性能的铸件。

We also make comparison and analysis between the two porosities: the Socialism at Its Early Stage, and the Socialism of Primary Stage.

并且对初级阶段理论两个重要命题：社会主义初级阶段和初级阶段社会主义进行了比较分析。

unhealed porosities and free surface of dendrites with crystalline steps were occasionally observed in aluminium alloy forgings.

铝合金锻件中有时有未锻合的疏松和残留的枝晶自由表面，并保留有原始的结晶台阶。

the porosities are measured by water displacement, solvent displacement, helium inflow and mercury pressure.

用饱水法、溶剂法、氦流法和压汞法测定孔隙率。

in this paper, the influences of echo spacing ( t_e), wait time ( t_w), oil saturation and salinity of formation water on the t_2 spectrum shapes and the transformation rules were discussed based on the experiments of cores with different porosities acquired from different oilfields.

在实验室对不同油田不同孔隙度的岩心进行核磁共振T2谱分析，研究回波间隔TE、等待时间Tw、含油饱和度及地层水矿化度对T2谱变化规律的影响。

in chapter four, bp models are established. the relationship between macroscopic and mesoscopic level of concrete is proposed from two sides: the strength predictive model predicts the compression strength of concrete with mean distribution radius and four different porosities;

第四章建立了BP神经网络模型，从两个角度尝试建立了混凝土细观与宏观之间的联系：强度预测模型从细观结构出发，通过混凝土孔隙平均分布半径和4个分孔隙率预测抗压强度；

high pressure accelerates organic matter evolution and offers protection to existing porosities ;

异常高压加速有机质热演化和对已形成孔隙的保护作用；

Intermediate arrays have porosities falling between these limits.

中间的排列方式,孔隙率介于这两个值之间.

It is well known that bed porosities are greater near the bounding surface.

众所周知,靠近边界表面的床层自由空间率较大.

In the lignite matrix , the porosities are mainly and macroporosities.

褐煤基质中的孔隙以中孔、大孔为主.

In addition, the rapidly decreasing stages of source rock porosities only match their early oil generation.

另外, 泥岩孔隙度快速降低时仅对应于生烃的早期阶段.

The unhealed porosities might be a possible source of flake formation.

这种空隙很可能是白点断口的一种断裂源.

Using LLW setup and a C-scan system, defects in composite laminates suchas delaminations and porosities were successfully detected.

采用泄漏兰姆波C扫描技术，可成功地检出复合材料层板中的分层及孔隙等缺陷。