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By adopting one step synthesizing method, the polymerization of directly aroma cyclizing of alkyne and nitrile is simple.

聚合反应通过炔腈直接芳环化,合成方法简单,采用一步法的合成方法,超支化聚合物显示出高亮度和高发光效率,具有耐高温,耐腐蚀,比重轻,强度高等特点,可望作为用于航天的高性能材料。

Under such conditions the yield of allantoin is 28.75%.

这种两步法合成尿囊素的关键在

The industrial synthesis of 1, 4-butanediol from allyl alcohol involves two steps with low yield and selectivity.

目前工业上都是采用两步法由丙烯醇生产1,4-丁二醇,效率低,选择性差。

Basing on theoretical analysis of ammonification, drying and particle formationin fluidized bed, experiment was done in the superheated steam fluidized bed toprepare MAP by reaction and drying.

在理论分析的基础上,进行了过热蒸汽流化床反应干燥一步法制备MAP的试验探索工作。

Design another set of specific primers, of which upstream and downstream primers were located in the two sides of the cleavage site respectively, to develop the one-step RT-PCR method for detecting H5 and H9 subtypes of AIV. Identify the sensitivity of the developed one-step RT-PCR method by detecting 2 AIV strains of H5 subtype and 3 AIV strains of H9 subtype, and the specificity by detecting the RNAs of NDV, IBV and IBDV as well as analogue detection using computer software.

根据H5、H9亚型HA基因序列,分别设计一套特异性引物,其上、下游引物分别位於裂解位点两侧,应用RT-PCR一步法检测AIV H5和H9亚型,并验证所建立方法的敏感性;通过检测NDV、IBV和IBDV等RNA病毒及电脑软件模拟检测,验证其特异性。

Based on the original research of the high order single step method ,this paper makes the research on the applicability of this method for the analytic expression of stiffness.

本文在原有高阶单步法研究的基础上对刚度为时间解析函数时方法的适用性进行了研究。

Crossovers are the first of the more sophisticated stances.

交叉步法是第一种较复杂的步法

By analyzing the moving footwork link of block technique in current volleyball teaching material in Chinese physical education colleges, this paper points out the existing shortcomings of the current teaching material, that are classify, moving direction, footwork category and so on.

摘 要:在分析我国现行排球教材拦网技术移动步法环节的基础上,指出现行教材该环节在分类、移动方向、步法种类等方面存在的不足,并提出新的技术理论。

In this study,we examined the effects of a two-step culture system ,which use the different culture media,on early cleavage and competence of development of bovine zygotes in vitro fertilized.

结果表明,GSH与二步法培养系统结合相对于传统的一步法培养系统更适于牛体外受精卵的体外培养。

Firstly, based on the sliding mode control and backstepping technique, a new attitude tracking controller is derived to control the attitude motion of spacecraft, the stability of the system is analyzed via Lyapunov method and the reaction wheel dynamics is also considered from the real applications point of view. The whole design process is divided into two steps: the first step is to use sliding control technique to design suppositional adaptive variable structure controller; and the second step is to design attitude tracking controller based on SMC and backstepping technique. Numerical simulations are performed to show that both tracking maneuver and vibration suppression can be accomplished effectively.

首先,采用自适应后步法结合主动振动控制技术设计了姿态跟踪鲁棒控制器,基于Lyapunov方法分析了系统的渐近稳定性;在此基础上,显性地考虑了执行机构动态特性问题,将整个设计过程分为两个步骤:第一步采用滑模控制技术设计了变结构虚拟控制器,给出自适应控制律的设计方法;第二步,将后步法与滑模控制技术相结合,设计了姿态跟踪鲁棒控制器,给出飞轮电压的输入算法及稳定性分析;最后,将提出的控制方法应用于挠性航天器的姿态跟踪控制,通过数值仿真对所提方法的可行性与有效性进行分析和验证。

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推荐网络例句

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面,更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值,分为几个相等的区间作为横轴,并将各区间内所测定值依所出现的次数累积而成的面积,用柱子排起来的图形,也叫做柱状图。

You rap, you know we are not so good at rapping, huh?

你唱吧,你也知道我们并不那么擅长说唱,对吧?