In the introductory chapter the history of transient molecules is reviewed so is the related spectroscopic techniques such as velocity modulation concentration modulation laser magnetic resonance and the relevant generation methods of transients .

第一章介绍了有关瞬态分子研究的历史发展，评述了各种相关的光谱技术例如 速度 调制、浓度调制和激光磁共振等常见的高灵敏、高分辨光谱技术。简介了几种生成瞬态分子的常用方法。

Uses the advanced frequency conversion speeder to carry on the electrical machinery velocity modulation the ease of operation the rotational speed may move safe and accurate .

采用先进的变频调速装置进行电机 调速，操作方便，转速可调，安全准确。

Frequency conversion velocity modulation ; Frequency ; Energy conservation .

变频 调速；频率；节能。

In this paper the diminishable magnetization velocity modulation invertiable control the test data and curve and the inverting efficiency as well as control scheme and presented .

文中给出了弱磁 串 调、逆变器控制原理，计算和实验数据及曲线，并分析了逆变效率及解决方案。

An electron tube used to generate or amplify electromagnetic radiation in the microwave region by velocity modulation .

通过 速率 的 调制在微波波段产生或增强电磁辐射的电子管。

Through a series of experiments to the principle prototype the invertor control policy the frequency conversion velocity modulation and so on and the experiment profile has been given simultaneously the feasibility of the system has also been proven .

并通过一系列的实验对原理样机，逆变器控制策略，变频 调速等进行了验证，给出了实验波形，同时也证明了系统的可行性。

Through simulation on velocity modulation system of water wheel generator indicated control effect of this control mode surpassed the conventional PID control .

通过对水轮机 调速系统进行仿真，表明了该控制方式控制效果优于常规PID控制。

The research of direct current velocity modulation system simulation by combing VB and Matlab

VB与Matlab结合对直流 调速系统仿真的研究

Under the U / f velocity modulation pattern the asynchronous machine physical characteristics are hard .

U/f 调速模式下异步电机机械特性较硬， 转速 精度能 满足 系统要求。

Because direct current motor 's governor deflection is broad the velocity modulation characteristic is smooth .

由于直流电动机的调速范围宽广， 调速特性平滑。

Application of the feedforward control method in winder velocity modulation system

前馈控制在复卷机 调速系统中的应用

A Laser Intensity-Stabilizing System with an AOM Study on the Spectrum of SO ~ + Using the Velocity Modulation Spectroscopy Combined with the Optical Heterodyne

采用声光调制技术的激光光强稳定系统SO~+分子离子光外差& 速度 调制激光光谱研究

It focuses on the early failure signal examination separation and diagnosis in frequency conversion velocity modulation system .

着重于变频 调速系统早期故障信号的检测、分离与诊断。

Economy numerical control lathe master drive system frequency conversion velocity modulation transformation

经济型数控车床主传动系统的变频 调速改造

Based on the mathematic model of separately excited DC motor the control structure of the single-feedback-closed-loop controlled DC velocity modulation system was obtained .

在他励直流电机的数学模型的基础上，得到了单反馈闭环控制的直流 调速系统的结构。

The study object of this article is double electromotor frequency conversion velocity modulation system .

本文研究对象为双电机传动交流变频 调速系统。

Design of High Accuracy Intelligent Low Power Electromotor Velocity Modulation System

高精度智能小功率电机 调速系统的设计

This article has studied the asynchronous motor vector transformation control theory and carries on the speed calculation using the electric motor torque component of current the method designed a closed loop velocity modulation system not to have the velocity generator .

深入研究了异步电动机矢量变换控制理论和利用电动机转矩电流分量进行速度推算的方法，设计了一个闭环的无速度传感器矢量控制变频 调速系统。

The engine bed electricity uses the PLC control the frequency conversion velocity modulation .

机床的电气采用PLC控制、变频 调速。

Explained with emphasis uses the BPTS series frequency changer to the engine bed main axle velocity modulation plan transformation finally has produced the engine bed movement performance condition .

重点说明了利用BPTS系列变频器对机床主轴的 调速方案改造，最后给出了机床运行的性能状况。

Introduces three means of improving mechanism characteristic of asynchronism electromotor frequency conversion velocity modulation the V / F control the vector control and the control of drawing up the superconductivity technology .

介绍了改善异步电动机 变频后机械特性的3种方法：V/F控制、矢量控制及拟超导技术的控制。

Additionally the influence of the modulation electric field on the velocity modulation spectrum is discussed in the paper .

还讨论了 调制电场对 谱线的影响。

The driving circuit is used to enlarge the frequency modulation signal from 8031 CPU to drive the power transistor . Driving circuits in some kind of degree directly influence the system function in the frequency conversion and velocity modulation control system .

驱动电路的作用是将8031CPU 输出的调频控制信号放大到足以驱动功率晶体管，在变频 调速控制系统中，驱动电路的性能在某种程度上直接影响系统功能。

Realization of Current Sampling and Speed Examination Plan of Frequency Conversion Velocity Modulation System in DSP

变频 调速系统电流采样及速度检测方案在DSP中的实现

According to the constant pressure frequency compared to the control request in view of the alternating current machine complexity and the frequency conversion velocity modulation the paper proposes the alternating current adaptable frequency governing system series nerve network inverse systems control method .

根据恒压频比控制的要求，针对交流电机 参数的复杂性和变频 调速 特性，提出了交流电机变频调速系统的神经网络逆系统控制方法；

O LU 590 Velocity Modulation System Principles and the Application and Experience in Automobile Carline Processing

欧陆590 调速系统的原理及在汽车纵梁加工中的应用和体会

On this basis velocity modulation circuit system used AC-DC-AC-circuit form and used IGBT as the power device of main circuit .

在此基础上， 调速系统主电路采用了交-直-交型电路形式，并采用IGBT作为主电路的功率开关器件；