The rate-determining steps of isomeric ortho, meta and para nitrations of benzyl alcohol andbenzyl fluoride have been theoretically investigated at B3LYP/6-311G** level.
运用密度泛函理论(DFT),研究了吸电子氟基和供电子羟基在取代甲苯的α-H以后,其邻、间、对各位次进行硝化反应的速控步骤,在B3LYP/6-311G**水平上,计算了该速控步骤基元反应各反应驻点(反应物、过渡态和中间体)的优化几何、电子结构和能量性质,并首次给出了目标硝化反应速控步骤的IR谱学的动态特征及解析,从微观层面上验证了反应坐标C—N的形成和C—H的断裂是非协同的,从而无一级动力学同位素效应的实验事实。
Analysis on pH value and control step in wet FGD(flue gas desulfurization);
湿法烟气脱硫系统的pH值及控制步骤分析
The comparison of reaction rate, mass transfer rate and gas-liquid mixing rate indicated that the p-xylene oxidation process was controlled by the chemical reaction, and the control step was the oxidation of p-toluic acid to 4-carboxybenzaldehyde.
在典型的工业条件下,对二甲苯氧化过程为液相化学反应控制,控制步骤为对甲基苯甲酸生成对羧基苯甲醛的反应步骤。
The transfer of sulphur in pig iron melt is the control step in the process,which is judged by theoretical analysis and verified then by experiment.
研究用CaO(w(CaO) =90 % ) +CaF2 (w(CaF2 ) =5 % ) +CaCl2 (w(CaCl2 ) =5 % )渣对铁水脱硫过程的动力学 理论分析判断和实验证实 ,该过程的速率控制步骤为硫在铁液中的传质 说明加强和改善搅拌 ,是提高脱硫效率的重要措
Analysis of controlling steps study on absorption dilute gases of sulfur dioxide by sodium sulfide solution;
Na_2S溶液吸收低浓度SO_2的控制步骤分析
Operating area of each controlling step in the reaction process is determined.
文章研究了盐酸用量和浓度、搅拌强度、颗粒粒度、反应温度对Ａｌ２Ｏ３浸出率的影响，确定了反应过程中各控制步骤的操作区间。
By analyzing the kinetics steps of the gs reaction and the relationship between the original radius of particles and their reaction time,controlling step of the reaction is believed to be chemical reaction.
通过分析气—固反应的动力学步骤 ,以及原始颗粒半径与反应时间的关系 ,得出化学反应为此分解过程的控制步骤。
Theoretical study on the reaction rate control step of the carbonylation of methanol??
甲醇羰基化反应速率控制步骤的理论研究
control the rate of
控制…的比率／速度
They are taking steps to keep down the rabbit population.
他们采取步骤控制兔子的繁殖增长。
Study of the Power Factor Controlling System on Induction Motor Variable Frequency Mode;
异步电动机变频调速的功率因数控制系统研究
The kinetics of leaching process of zinc oxide ore is researched and it indicates that diffusion is the rate controlling step.
对氧化锌矿浸出过程动力学进行了研究,结果表明,扩散是浸出的速度控制步骤。
to recommend any indicated changes in controls, policy or procedures.
为提供在控制政策和步骤中的任何指定的变化
The major steps in achieving internal control over cash transactions and cash balance include.
适当的现金内部控制应包括如下主要内容步骤。
Dissecting Multiple Steps of Vesicle Trafficking and Elucidating Their Regulatory Mechanisms;
囊泡转运步骤的分辨及其调控机制研究
The interfacial diffusion of microemulsion membrane controled extraction process.
动力学研究表明提取过程的速控步骤为微乳液膜界面扩散过程。
RSCS (Rate Stabilization and Control System)
速率稳定与控制系统
single-speed floating control system
单速率浮动控制系统
Experimental Investigation in Double Closed-loop Variable Frequency and Adjustable Speed System of Slip Frequency Controlled Asynchronous motor
转差频率控制的异步电动机双闭环变频调速系统的实验研究
Research on Rotor-Side Variable Frequency Drive and Its Control Strategy of High Power Induction Motor;
大功率异步机转子变频调速系统及其控制策略研究
The Power Control of the Pitch-controlled Two-speeds Asynchronous-generator Wind Turbine;
变桨叶调节双速异步大型风力发电机组的功率控制
This paper introduces the four steps of progress control, which are plan, do, check and action, with the emphasis on the first two steps.
本文介绍了进度控制的四个步骤:计划、行、查和行动,并且着重讨论了前两个步骤。
Control Point, CP:Any point, step, or procedure at which biological, physical, or chemical factors can be controlled.
管制点可控制生物性、物理性及化学性之一个点、步骤或程序
The logic strategies of using controlling medical expenses as a core in the progress of ongoing health care reform
以医疗费用有效控制为核心的医药卫生体制改革逻辑步骤
Rate Control Strategy in CBR Video Transcoding
恒定速率视频编码转换码率控制策略