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1·A pulse frequency modulation (PFM) with discrete frequency is designed.

设计了一种离散频率的PF M控制方式。

2·A discrete frequency control method is proposed for thyristorized static switch.

介绍了用于感应电机起动的离散频率控制方法。

3·A kind of induction motor soft start control method based on discrete frequency principle is introduced.

介绍了一种基于离散频率原理的电机软启动控制方法。

4·A concept and a numerical formula of flowing velocity on many blades are presented to discuss noise in the discrete frequency.

为了讨论离散性频率噪声，本文提出了多叶叶道流速激发的概念和计算公式。

5·It is a basic formula of acoustic characteristics in discrete frequency of the blade in which the gas flowing has many classes.

这是多级叶轮气流系统离散性频率声学特性的一个基衣公式。

6·It has four start mode: the ramp voltage start, the limit current start, the ramp speed start and the discrete frequency start.

所研究的软起动器具备四种起动方式：电压斜坡起动、限流起动、转速斜坡起动和分级变频起动。

7·The frequency synthesizer is a kind of discrete frequency singal generator with high stability, and it is widely used in communication, radar, apparatus and navigation system.

频率合成器是一种频率稳定度较高的离散间隔型频率信号发生器，广泛应用在通信、雷达、仪器仪表及导航系统中。

8·In the study of flow oscillation and discrete frequency noise of impinging jet, it is found that there is a critical pressure ratio for a given nozzle and a nozzle-to-plate distance.

为探索冲击射流离散频率噪声的产生机理，系统地研究了冲击射流离散频率噪声的特性。

9·Within these pulses are a number of discrete colours of light in what is known as a frequency comb.

伴随这些脉冲的是很多离散光，被称为“频率梳”。

10·The paper presents a method of motion curve frequency domain filtering in Omni-directional M-mode echocardiography images based on Discrete Fourier Transform (DFT).

介绍一种基于离散傅里叶变换(DFT)的全方向M型超声心动图运动曲线频域滤波技术。