Power section can be tuned to change pressure pulse frequency.

动力装置功率可调，进而可改变压力脉冲频率；

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。

Varying frequency is used to control AC pulse frequency in normal welding state.

正常焊接状态时变频控制交流脉冲频率。

However, LH pulse frequency and LH pulse amplitude were unaffected by treatments.

但LH的脉冲频率和幅度不受上述处理的影响。

It could be used to detect pulse frequency and provided with circuit for pulse cycle detection.

除了可以测脉冲频率外，还有专门测脉冲周期的电路。

Then the principle of Pulse Width Modulation and Pulse Frequency Modulation is analyzed in detail.

之后阐述了脉冲宽度调制和脉冲频率调制的工作原理。

It trans - forms the speed signal into pulse frequency signal to measure speed and indicate the speed.

本文给出了一种齿轮测速的方法，将转速信号转化为脉冲频率信号进行测量和显示。

The spread and compress of millimeter wave pulse frequency spectrum will happen in Doppler Effect during rain.

在降雨条件下，多普勒效应后毫米波脉冲频谱发生展宽和压缩。

As the increasing of pulse voltage and pulse frequency increasing. the refining effect was much more obviously.

随着脉冲电压的升高、脉冲频率的增加，细化效果更加显著。

In addition, the changes of the laser pulse width and pulse frequency to affect the weld width were investigated.

此外，对激光脉冲宽度及脉冲频率对焊缝宽度的影响作了深入研究。

Wider pulse width, low pulse frequency and medium peak power should be used when pulse laser welds magnesium Alloy.

脉冲激光焊接镁合金时应遵循较大脉宽、低频率、中等峰值功率的原则。

Sampling point number of every pulse cycle, instantaneous pulse frequency and period was gained with program operation.

经程序运算得到每个脉冲周期的采样点数，瞬时脉冲频率和周期。

The results show that kerf width decreases with pulse frequency increases under the same average power and pulse width.

结果表明，当平均功率和脉冲宽度相同时，切缝宽度随着脉冲频率的增大而减小；

This paper briefly introduced a practical system utilizing pulse frequency signal to achieve multipoint analogous monitoring.

简要介绍利用脉频信号实现多点模拟量监测的一种实用系统。

On the pulse frequency encoding of the antennas, the thesis provided the feedback units using multi closed loop delay circuit.

在光学天线频率编码分析中，本文提出了利用多光纤环级联代替单光纤环作反馈单元实现频率编码的思想。

Describes a new design of pulse frequency dividers in which timers NE556 and sequence control unijunction transistors are used.

利用定时器ne556和程控单结晶体管，设计了一种新型多路脉冲分配器。

The results show that the deposit rate, composition and properties of coating change with the variation of duty ratio and pulse frequency.

结果表明，镀层的沉积速率、镀层成分及镀层的性能都随脉冲频率和占空比的变化而变化；

Based on the model, the relationship between the main pulse frequency of supply power and the balanceable inter-electrode gap is discussed.

给出了脉冲电化学加工极间平衡间隙的数学模型，并据此讨论了高频群脉冲电化学加工中，电源主脉冲频率与平衡加工间隙的关系。

Motor back to the corner and enter the total number of pulses proportional to the corresponding speed depends on the input pulse frequency.

电机总的回转角与输入脉冲数成正比例，相应的转速取决于输入脉冲频率。

Data acquisition system discussed in this paper is a part of the measurement system of pulse-to-pulse frequency stability of RF pulse trains.

数据采集系统是射频脉冲序列脉间频率稳定度测试系统中的一部分。

The semiconductor laser power supply features continuous adjustable laser pulse frequency and continuous adjustable laser driving current of 6~30A.

其中，激光频率设置为连续可调，激光器的驱动电流6~30A连续可调。

Taking MIG welding as example, under each control modes, the welding parameters such as the welding current, welding voltage, pulse frequency, etc.

以铝合金MIG焊为例，在每种脉冲模式下，分别改善焊接电流、焊接电压、脉冲频率、占空比等参数进行焊接并采集输出电流波形。

The degradation of methyl orange was high, which was related with the peak value, pulse frequency and duty circle of positive pulse and anode area.

甲基橙的脱色程度与峰值电压、脉冲频率、占空比、阳极电极面积等有关。

Object's radial velocity effect on object's radar cross section (RCS) outdoor measurement with pulse to pulse frequency shifting radar was researched.

研究了在脉间变频格式目标雷达散射截面(RCS)测试中目标径向速度对测试结果的影响。

The paper introduces the principle of ZK400 Vacuum RT Machines; from control pulse frequency of step-motor to adjust mixes speed of Vacuum RT Machines.

本文介绍了ZK - 400真空注型机的原理及功能，并重点介绍了通过控制步进电机的脉冲频率达到调节真空注型机搅拌速度的目的。

Acidizing fluids' type, concentration, jet pulse frequency, treatment time and interval treated may be selected according to degree of formation plugging.

该工艺可根据地层堵塞情况及程度，选择酸液种类、酸液浓度、射流脉冲频率、处理时间和处理层位。

It is indicated from the process experiment of coin figure that smaller gap and higher surface quality are obtained by choosing higher main pulse frequency.

并根据设计的硬币花纹工艺试验表明，选择较高的主脉冲频率，可获得较小的加工间隙，进而获得良好的表面质量。

When stepping motor works in some pulse frequency, it may have the problem of oscillation and miss of synchronization, so it should be avoided at full steam.

在一定控制脉冲频率下，步进电动机可能出现振荡与失步现象，严重影响步进电动机的运行，要严格防止这种情况发生。

This research is aimed to get higher quality functions by use of single- chip processor and way of pulse frequency modulated (PFM) or pulse width modulated (PWM).

用单片机作为控制手段，采用脉冲调频（或调宽）方法，达到了较理想的控制品质。

It is indicated from the results that effected by the high frequency group pulse power, higher machining quality is obtained by choosing higher main pulse frequency.

结果表明，在高频群脉冲电源作用下，选择较高的主脉冲频率，可获得良好的加工质量。