The relationship of surface active site and turnover frequency versus activity for ammonia synthesis catalyst which were obtained from different iron oxide as precursor were investigated by means of a physisorption of N 2 and a chemisorption of CO and CO 2 and activity test.
随着母体铁氧化物性质和组成的变化 ,催化剂活性 (以氨的体积分数表征 )、质量反应速率 (rm)、合成氨转换频率 (TOF)和表面酸覆盖度 (SA)及其酸碱覆盖度的比例 (SA/SK)有相似的变化规律 ,即与Fe2 +/Fe3+呈驼峰形变化曲线 。
The Design of Slip Frequency Controlled VVVF System Based on Microcontroller;
基于单片机的转差频率控制变频调速实验系统设计
Stator-flux-orientated slip frequency control for induction motor;
异步电机按定子磁场定向的转差频率控制
The reverse-control wired stable stop of a 450 t cool-shear-machine by measuring the electromotor rotor frequency to control the non-contact system is succeeded.
利用检测电机转子频率的方法控制无触点系统实现了 45 0t冷剪机的反接制动稳定停车 ,方法简单 ,运行可靠。
Previous observations of other neutron stars have shown that the X-rays emitted during bursts display oscillations that correspond to the rotation rate of the neutron stars.
可见：他们对X-射线震荡发射频率和中子星转动频率的关系是有观测根据的。
The Vector Control Simulation of the Slip Frequency of Asynchronous Motor
异步电动机转差频率的矢量控制仿真
Studying Frequency Veering Characteristics of Aircraft Engine Blade with Beam Function Combination Method
航空发动机叶片“频率转向”特性研究
AN OPTIMAL DYNAMIC DESIGN OF AEROENGINE ROTORS WITH FREQUENCY CONSTRAINTS
带频率禁区的发动机转子动力优化设计
Affect of the Vibration Frequency of Labyrinth Seal on the Dynamic Coefficient of Rotor
迷宫汽封振动频率对转子动特性系数的影响
Frequency Capture of Vibration System with Two-Motor Drives Rotating in Same Direction
同向回转双机驱动振动系统的频率俘获
DDZ-Ⅲ series process electronic control system-Frequency converter
GB/T13635-1992DDZ-Ⅲ系列电动单元组合仪表频率转换器
Calculation of Natural Frequency of Torsional Vibrations for an Enclosed Disc Shaft System
封闭盘轴系统扭转振动固有频率的计算
The ω Variation in Moments of Inertia for Normally Deformed Hand ~(171)Yb[521]1/2 in Rare-earth Odd-A Nuclei;
奇A核~(171)Yb的[521]1/2带转动惯量随角频率的变化
Research on Slip Frequency Vector Control Scheme of Asynchronous Motor
异步电动机转差频率矢量控制方案研究
Natural frequency reliability sensitivity analysis of a rotor system
转子系统振动的频率可靠性灵敏度分析
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
Electromyography Mean Power Frequency Alternations during Rapid Transition of Elbow Flexion to Extension
主动肌和拮抗肌功能转变瞬间的肌电平均功率频率变化
a movable control knob or other device on a radio or television receiver used to change the frequency.
收音机或电视机用来转换频率的转动控制钮或其它装置.
input quantity to frequency conversion type
输入量-频率转换型
natural frequency of rotor/bearing system
转子支承系统固有频率
voltage-frequency AD converter
电压频率模-数转换器
automatic frequency control
自动频率控制自动频率调整