查询词典 si

The restraining effect of Si decreases with decreasing temperature. Fe reduces the chemical potential gradient of the dissolution of iron into molten Al and the driving force of the diffusion of Al into die.

Fe的作用主要是降低模具钢向铝熔体中溶解的化学位梯度和铝向模具中扩散的驱动力，因而，合金中的Si、Fe元素可以降低合金的焊合倾向性。

This process is however not practical as the separation of the fine powdery Si from the ZnCl2 appears to be problematic.

但是该工艺是不实用的，因为从ZnCl2中分离细粉末状的Si看来是有问题的。

Si-B-N ceramic fibers with composition Si1.13BN2.47 were prepared by melt-spinning, curing and pyrolysis of a preceramic polyborosilazane.

以聚硼硅氮烷为先驱体，经熔融纺丝、不熔化处理以及在氨气气氛中高温裂解制备了Si-B-N陶瓷纤维。

Based on the mechanical properties of Si, the problem of the real contact depth was investigated through ANSYS FEA simulation.

用ANSYS有限元软件对Si材料进行了压入仿真，根据仿真结果研究了实际接触深度等问题。

This article describes that, instead of a Si-PIN detector , a domestic TX410 thin window high resolution proportional counter is used in an SZ-2 X-ray fluorescence analyzer to determine the Cu,Fe,S,SiO2 contents of the copper ores in a copper mine situated in yunnan prorice, south-west China.

给出了一台SZ-2X射线荧光分析仪上的 Si-PIN 探测器用国产TX410薄窗高分辨正比计数管替代，测云南某铜矿Cu、Fe、S、SiO2的含量。

Firstly, this paper definited pseudometric d for n -foldproduct of σ-algebra A of subsets of a given set X , and definited indicator function ; secondly, gave the concept of differentiable of set function at S° and concept of partial derivative at S° with respect to the ith argument Si through indicator function, and defound the weak efficient solution of and optimality necessary condition; Finally, obtained three weak duality results and strong duality results under generalized convexity conditions.

首先，对已知集X的子集的σ-代数A的n-折积A^n，定义了伪度量d，给出了相应的特征函数〈h，Is〉；其次，通过特征函数给出了集函数在S 可微的定义及集函数在S 关于第i个变量Si的偏导数定义；给出了多目标规划问题的弱有效解概念及的最优性必要条件；最后，分别在目标函数和约束函数的3种较弱凸性条件下，研究n-集函数多目标规划问题的对偶问题，获得了3个弱对偶结果和强对偶结果。

In this dissertation, high quality ZnO and AZO films were deposited on SiO_2/Si and quartz glass substrates by RF magnetron sputtering.

本论文主要工作是研究如何利用简便的射频磁控溅射技术在SiO_2/Si和石英玻璃衬底上制备高质量的ZnO及其掺Al薄膜。

The brazing process includes selection of brazing materials, pre-brazing preparation, regulation and deformation control of brazing parameter. The Al-Si alloy wires core was used as filler metal and the gasoline flame with quincunx nozzle was used as heating source. Through FEM analysis, a set of technological equipment was designed to control brazing distortion.

通过对焊接材料、焊接规范、焊接工装等方面进行的试验和分析，确定了6063铝合金门窗框的钎焊采用无腐蚀性的Al-Si合金铝钎焊药芯焊丝作为钎料，汽油火焰作为加热热源的工艺方案，并通过有限元分析设计了简单易用的焊接工装以控制焊接变形。

It is confirmed that realumination of SDY was caused by reinsertion of the extraframework aluminum into the zeolitic framework and some Si atoms in SDY framework can be removed in 1.0mol.dm^-^3 KOH solution.

证实了KOH溶液溶解非骨架铝后，铝原子重新进入SDY的骨架，导致Si/Al比降低。

The calculated results show that the relative stable Si-terminated surface has the lower surface energy than the Co-terminated surface.

结果表明表面能较低的Si终止表面比Co终止表面稳定。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。