查询词典 si

The composi tional change profiles of monazite demonstrate a heterogeneous distribution of e lements La, Ce, Nd, P, Th, Si, Ca and U. This was caused by the differences in geological environments, temperatures, pressures and compositions of the hy drothermal solutions.

根据微区剖面(0.18mm)元素分布曲线，指出了La、Ce、Nd、P、Th、Si、Ca和U等元素表现出8～10个微环带成分不均匀分布的特点，并认为成矿溶液的地质环境、温压和微量元素含量变化是不均匀分布的主要原因。

No transition state was found from mono-σ bonding state to 1,4-binding state by our theoretical calculation, so the adsorption mechanism of benzene on Si(111)-7 * 7 surface was proposed.

计算结果表明苯在Si(111)- 7 * 7表面的主要吸附种是双σ成键的1，4加成产物，不稳定的单吸附物种可能是 1，4加成物种的前驱态。

In this paper, the Al~(3+)-doped ZnO thin films were prepared on Na-Ca-Si glass substrateby Sol-Gel process from 2-methoxyethanol solution prepared by Zinc acetate as premonitory, monoethanolamine as stabilizator and aluminum chloride reaction.

本文采用溶胶-凝胶工艺在普通Na-Ca-Si玻璃基片上成功地制备出Al~(3+)掺杂型ZnO薄膜。

The lattice parameters in both solid solution at equilibrium andextended solid solution prepared by melt quenching seem to be predicted with moreaccuracy.By this modified model,the lattice parameters of Cu-Al,Cu-Si and Ni-Al systems solid solution at equilibrium and Ag-Sn,Ag-La and Ag-Gd extendedsolid solution were calculated.They are in better agreement with the experimentalvalues than the Moreen′s.

用本修正方法可以更准确地预测平衡固溶体和溶体淬火制备的扩展固溶体的品格常数，计算了Cu-Al，Cu-Si，Ni-Al平衡固溶体和Ag-Sn，Ag-La，Ag-Gd系扩展固溶体的晶格常数，本修正方法计算值比Moreen模型计算值与试验值相符更好。

The activity of Si is higher than that of Al when mullite combines with the electron donor.

当莫来石与电子给予体结合时，Si原子的活性高于Al。

Generation and propagation of crack was the typical character of α-Si〓N〓 under ball milling at room temperature.

形变严重局限在球磨α-Si〓N〓颗粒的表层，在球磨过程中主要通过裂纹的形核与扩展使颗粒尺寸细化。

This example demonstrates the implementation of two non-SI units of length, the nautical mile

这个例子展示了两个非SI长度单位的实现，海里

The NIEL induced by low energy proton in Si and GaAs have been calculated using analytical method and Monte-Carlo code. Thin_target approximation was used when calculating NIEL by SRIM code and the result compared with that of other authors'. The results show that thin_target approximation is reasonable and NIEL scaling is feasible. The NIEL values become lower after taking into account the screening effect.

为此，本文采用解析法和基于Monte-Carlo方法的SRIM程序计算了考虑库仑屏蔽效应后低能质子在半导体材料Si，GaAs中的NIEL，SRIM程序在计算过程中采用薄靶近似法，并与其他作者的计算数据和实验数据进行了比较。

Different silicidation processes are employed to form NiSi, and the NiSi/Si interface corresponding to each process is studied by cross-section transmission electron microscopy.

采用不同硅化工艺制备了NiSi薄膜并用剖面透射电镜对样品的NiSi/Si界面进行了研究。

Effects of reaction temperature, reaction time, amount of catalyst and the ratio of Si/Al on the nitration were investigated.

实验考察了反应温度、反应时间、催化剂用量及Si/Al等因素对反应结果的影响。

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％。