查询词典 Sn

We analyzed and proved that this kind of mounting can cover all useful sky area and has much lower and smoother angular velocity and acceleration than the altazimuth one. IN THIS PAPER WE ALSO DISCUSSED THE RELATIONSHIP BETWEEN TWO MOST OFTEN USED ALT-ALT coordinate systems (SN-ALT-ALT, EW-ALT-ALT coordinate system) and the sidereal hour-angle coordinate system, the horizon coordinate system.

本文推导了ALT-ALT跟踪机架光电人卫跟踪仪原理，分析证明了它在要求的跟踪区域内不存在观测盲区，对同一目标的跟踪角速度和角加速度比地平式机架跟踪仪小且平滑，可实现全天覆盖。

The experimental results indicate that the addition of NaOH is unfavorable to ammonolysis of α-CDA due to the participation effect of neighboring carboxyl group of α-CDA, which is contrary to the fact that strong alkaline environment is propitious to SN reactions of ordinary chlorinated hydrocarbons.

实验结果表明，与普通氯代烷的亲核取代反应不同，邻位羧基参与效应使得加入NaOH不利于α-CDA的氨解反应动力学和热力学。

Product rationalization by the formula Sn 97%, and the rest copper and antimony.

产品经合理化配方含锡达97%，其余为铜、锑。

However, we found, for nonstationary panels with deterministic trends, the S_N test statistics would be biased and its asymptotic distribution would not be standard normal.

但我们的研究表明，在非平稳综列数据含有确定性趋势时，SN检验是有偏的，不再服从标准正态的渐近分布，而需要进行修正。

In this thesis, we have calculated bismuth telluride based alloys by LAPW method and DFT-DVM method.

本文对Bi_2Te_3和掺Sn的Bi_2Te_3的电子结构进行了LAPW和量子化学方法计算。

The effect of the decrease in bremsstrahlung energy on the yields of these main products is examined.

其中~(11)C，~(18)F，~(45)Ti，~(47)Sc，~(57)Ni，~(57)Co，~(67)Cu，~(99)Mo，~(105)Ag，~(115)Cd，~(114m)In，~(111)Sn和~(111)In为主要产物，其他核素作为同时产生的杂质。

The finite element numerical method based on centimo theory and dispart-insert-value One side ,it is conventional energy method. It is transfiguration of Ritz-Galerkin method .

在求解非线性波动方程时，有限元方法通过剖分插值构造有限维子空间SN的基函数的方法保持了古典Ritz-Galerkin方法的优点，克服了它的不足。

Purification and Identification of Chub Aristichthys nobilis Protamine;2. This paper is about the growth of Aristichthys nobilis and Hypophthalmichthys molitrix on the basis of Einar Lea in Nihe reservoir.

本文研究了泥河水库鲢鳙鱼的生长规律，根据莱亚的鱼体长和鳞长的关系式Ln/L =Sn/S分别推算出鲢鱼和鳙鱼的生长速度体长增长值；并计算出泥河水库鲢鳙鱼的体长与体重的关系、肥满度和生长方程。

During -55~125℃ thermal fatigue, the microstructures will coarsen inhomogeneously.

在热疲劳过程中，显微组织将不均匀粗化，其中尤以过渡区AuSn〓和β-Sn粗化最为显著。

When pH value.5, faster deposition rate, faster growth rate of crystallizing nucleus, which causes bigger crystalline granularity and bad surface quality of the deposits such as crassitude or darkling.

镀液pH值和Sn~(2+)离子浓度也是影响晶粒粒度大小的关键因素。pH＜0.5时，沉积速度过快，晶核成长速度快，晶粒粒度较大，镀层表面粗糙、发黑，表面质量差。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。