步法

The catalyst conditions of 1,3-propanediol were researched, such as main catalyst, accelerant , solvent, etal.

针对一步法和二步法的技术路线，考察了不同催化条件对反应结果的影响，如主催化剂、膦配体、促进剂、活化剂和溶剂等。

In this paper, the catalyst and process of dimethyl ether from syngas were studied.

合成气一步法制二甲醚是近年来开发的一种新技术，相对于传统的两步法合成工艺，即先合成甲醇再脱水制二甲醚，合成气一步法合成二甲醚因其热力学上的有利性和经济上的合理性，成为C1化学研究的一个热点。

For household users to establish simple antifreeze dilution disposal ways of applying gender-controlled embryo freezingly-preserved technique by one-step vitrification dilution method,A,B,and C structure approaches of liquid layers in canaliculi were applied to investigate their survival capacity after embryos freshly-split by one-step dilution;and minimum capacity refrigerant method in specific canaliculus and above structure approach of liquid layer B were also applied to compare their survival capacity of frozen and melted embryos freshly split,and frozen and melted IVF embryos splited by one-step dilution.

为了创立在用户庭院就能应用的玻璃化保存性别控制胚胎的冷冻剂稀释处理方法，采用细管内3种不同液体层构成法，对新鲜分割胚一步法稀释后的存活能力进行了研究；其次用特定细管最小容量冷却法与上述3种不同液体层构成中效果较好的B法对玻璃化冷冻溶解的新鲜分割胚、体外受精分割胚及冷冻溶解的体外受精分割胚进行一步法稀释后的存活能力予以对比。

The flow sheet 图表 shown in FigⅠis intended to illustrate Ⅰ the one-step process.

是说明一步法的流程图。图①是说明一步法的流程图。

Secondly,the one-step and multistep methods of the precise integration algorithms arederived by means of the integration of functional matrix by parts and interpolation function,and some recursion schemes suitable for precise integration are obtained.

然后，以函数矩阵的分部积分法和插值函数为工具，推导出精细积分的单步法和多步法，给出了多种精细积分的递推格式。

Two-step process and current development of furfural production are discussed. It can be concluded that two-step...

由于两步法糠醛收率可以达到70％以上，并且能够综合利用原料，所以两步法必将成为今后该领域的重要研究方向。

These have limited the development of furfural production. In this paper, one-stage process was reviewed briefly. Two-step process and current development of furfural production were discussed.

本文在对一步法的生产工艺进行概要介绍的基础上，重点对两步法糠醛生产工艺以及糠醛生产工艺的最新进展进行了讨论。

Based on the general inverse of matrix, a group of two-step methods for dynamic condensation were derived.

在基于矩阵广义逆的基础上，提出了一组新的动力缩聚两步法，该方法的精度高于已有的两步法。

Soybean ; Bean pod mottle virus ; one step real-time fluorescent RT-PCR ; one step RT-PCR ; detection

大豆；菜豆荚斑驳病毒；一步法实时荧光RT-PCR ；一步法RT-PCR ；检测

In Chapter 3, we investigate the delay-dependent stability analysis of linear multistep methods when they are applied to the neutral delay differential equations. We state a necessary condition for any linear multistep method applied to the neutral delay differential equation to be Nτ(0)-stable.

在第3章中，考虑了中立型延迟微分方程线性多步法依赖于延迟的稳定性分析，给出了任意线性多步法是Nτ（0）-稳定的一个必要条件。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失