查询词典 selectivity

A generalized mathematical model was developed to describe the distribution of over-potential.Dimensionless variables μ and ω that characterize the polarization and influence of side electrode reaction in the system,were derived from modeling.Adomian's decomposition methodADM）was used to solve the nonlinear differential equation of the model to obtain an approximate analytical solution,which was in the form of algebraic expressions of infinite power series.By the solution,the relationship between over-potential distribution and average selectivity could be easily calculated without solving the nonlinear model time and again.

建立了描述超电势分布的普遍化数学模型，归纳出表征电极极化和副反应影响的量纲1数μ和ω，并用ADM（Adomian's decomposition method）对该非线性微分方程模型求解；所获得的逼近解代数表达式，可方便地计算不同参数下超电势分布对平均选择性的影响，而毋需反复求解模型微分方程。

The electrode has a highly selectivity for silver ion over alkali, alkaline earth and common transition metal ions.

该电极可作为测定维生素B1药片中维生素B1含量的电位滴定指示电极和水样中银离子含量的直接测定。

Supercritical conditions can enhance the conversion of isooctane but lower the alkene selectivity simultaneously.

超临界条件与常压相比能提高异辛烷的转化率，但同时使烯烃选择性降低。

When the mol quantity of Cu2+ dissolved was 5% of those of AlCl3 in ionic liquids, alkylation results from ionic liquids is comparable with those obtained with concentrated sulfur acid: the yield of alkylate reaching 178% of the volume of butene inputted, the selectivity of C8 reaching 75% and the octane number of alkylate reaching 92.2.

溶入Cu2+和Cu+后，离子液体的催化性能有显著的改善，当Cu2+的摩尔加入量为三氯化铝的5%时，烷基化油收率达到丁烯体积的178%，对C8的选择性为75%，烷基化油辛烷值为92.2，并且离子液体可以重复使用。

Some advantages of this invention are that it provides desirable catalyst lifetime and activity, minimizes resin swelling, and provides a desirable, sustained selectivity to alkylene glycol.

本发明的优点是，它提供了所希望的催化剂寿命和活性，最大程度地减少了树脂溶胀和提供了理想的、持久的对亚烷基二醇的选择性。

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。

Low concentration of allyl alcohol helped to increase the reaction rate and high concentration of H2O2 could decrease the selectivity to glycidol using water as a solvent.

当催化剂用量一定时，以水为溶剂，较低的烯丙醇浓度更有利于反应的进行，而较高的双氧水浓度则会降低产物的选择性。

It is possible to achieve the conversion of allyl chloride and selectivity for epichiorohydrin as high as 99% on Ti-MWW.

在Ti-MWW催化剂上烯丙基氯的转化率和环氧氯丙烷的选择性都能达到99%以上。

This method can be operated conveniently at ambient temperature with high sensitivity and good selectivity.

本文研究发现在一定条件下，硫氰酸锌配合物与HSA具有强的结合作用，导致

The key technology of the catalytic amination process of fatty alcohols is the amination catalysts with high selectivity.

催化剂的关键性能是其选择性。

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。