pulse frequency

In this paper, the difference between the short term frequency stability of a pulse Doppler radar and that of a continuous-wave system is discussed in detail, and a set of approximate formulas is presented.

文中详细讨论了脉冲测速雷达的频率短期稳定度与连续波时的差别，并给出近似计算公式。

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Its principle is electrotherapeutics of low-frequency pulse, that use the low-frequency pulse that to excite point of body to achieve goal of treatment, and make people feel comfortable by the stimulate of the special frequency and scope of pressure.

它的基本原理是低频脉冲电疗法，就是利用控制系统产生和控制特定的低频脉冲作用于人体的不同穴位，其脉冲频率和电压幅度完全适合人体弛张节奏，从而达到治疗的目的。

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In the meantime, the key mode-locking device and its mode-locking mechanism was analyzed. Also, the theoretical calculation of beat frequency for mode-locked pulse was worked.

同时对锁模技术的关键器件及其锁模机理进行了分析。

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The interpolation precision of pulse multiplier-based fine interpolator is related with the max feed rate, pulse equivalent of CNC, interpolation cycle, and output pulse frequency of pulse generator and the main reason of its error production comes from the rounding processing of crossover frequency number.

基于脉冲乘法器原理的精插补器的插补精度与最大进给速度、机床系统的脉冲当量、插补周期以及脉冲发生器的输出脉冲频率有关，其误差产生的主要原因是由分频数圆整造成的。

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The effect of pulse frequency and pulse duration ratio on the abrasion resistance of gold coatings is investigated with pulse plating in cyanide free and trace cyanide baths.

研究了脉冲电镀在微氰镀金，无氰镀金体系中脉冲频率、脉冲占空比对镀金层耐磨性的影响。

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The current density pulse frequency and form affects the wearing action of MAO coating.

电流密度、脉冲频率和波形对膜层磨损行为有影响。

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The changes of pulse frequency spectrum in Doppler Effect are analyzed when millimeter wave pulse propagates through rain medium.

分析了降雨环境下，多普勒效应后毫米波脉冲频谱特性。

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Pulse frequency modulation magnetic tape record type strong-motion instrument

脉冲调频式磁带记录强震仪

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This method can be applied to different countries' UWB frequency spectrum programming for its flexible control of pulse frequency and bandwidth.2.An improvement is made to the multi-user Prolate Spheroidal Wave Functions ( PSWF) IR UWB orthogonal pulse waveforms design.

该方法具有频率、带宽的灵活可控性，适用于不同国家的UWB频谱规划方案。2.对多用户椭球波函数（PSWF）脉冲UWB正交波形设计方法进行了改进。

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Object's velocity effect on pulse to pulse frequency shifting RCS measurement

目标速度对脉间变频格式RCS测试的影响

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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；

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A High-Efficiency Pulse Frequency Modulation Control Scheme

一种高效率的PFM控制策略

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The principle error of the TDR cable length measurement has also been analyzed. The influence of measuring numbers, counting pulse frequency and traveling wave velocity on measuring accuracy is analyzed.

分析了时域反射电缆测长的原理误差，研究了测量次数、计数脉冲频率、行波波速对测量精度的影响。

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Simplified Design of High Range Resolution Pulse to Pulse Frequency Shifting Outdoor RCS Measurement Device

HRR脉间变频外场RCS测试设备的简化设计

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Changes of pulse time and pulse frequency had little influence on the antibacterial activity of LF.

脉冲时间、脉冲频率改变对LF抑菌活性影响较小。

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Calculation method of critical radar cross section of low pulse repetition frequency PD radar

低重频PD雷达的临界散射截面计算方法

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The Requirement of Short Term Frequency Stability of RF Pulse Train for COR, MTI, and MTD Radar

COR、MTI、MTD雷达对射频脉冲序列频率短稳的要求

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Kerf width increases in accordance with the changing of average power, peak power and pulse energy as pulse frequency is equal to pulse width.

脉冲频率和脉冲宽度相同时，切缝宽度随着平均功率、峰值功率和单脉冲能量的增大而增加；

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Research on Two-Channels Pulse to Pulse Frequency Shifting Outdoor RCS Measurement Radar

双通道脉间变频外场RCS测试雷达的研究

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With the progress of science and technology, pulse compression processing systems are developed to all-digital systems from analogue or digital-analogue ones. Digital pulse compression processing can be divided into pulse compression processing in time domain and pulse compression processing in frequency domain.

随着科学技术的进步，脉压处理系统从模拟式、数模结合式发展到全数字式，而数字脉压处理又可分为时域脉压处理和频域脉压处理。

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The pulse control strategy is to control pulse frequency based on expected voltage output frequency, so as to realize no system high frequency and avoid the PWM strategy.

脉冲控制策略以期望的电压输出频率控制脉冲频率，实现系统无高频，避免了脉宽调制。

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effect of pulse frequency on titanium alloy micro-arc oxidation coating

脉冲频率对钛合金微弧氧化膜的影响

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The results showed that the kerf width increases with the increase of the power density, pulse frequency and pulse width;

结果表明，缝宽随激光功率密度、频率以及脉宽的增加而加大；

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After field testing select a best frequency of the test pulse.

经过实地检测选取了试验时所需脉冲的最佳频率。

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Design and Realization of Two-Channel Pulse to Pulse Frequency Shifting RCS Testing System

双通道脉间变频格式RCS测试系统

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Local control is that users can control metering pump stroke and pulse frequency via panel buttons. Remote control is that users can use remote PC to operate the microcontroller through CAN-BUS to achieve the purpose of controlling the metering pump.

本地控制是指通过面板上的按键来控制计量泵的行程和脉冲频率；远程控制是指PC机通过CAN总线对单片机进行远程操作从而达到控制计量泵的目的，并且通过界面显示监控计量泵。

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Experiments show that droplet transfer keep all to one-peak-zero-base type under controlling by this method as the welding parameter varies, such as peak current, base current and pulse frequency.

它是一种物理状态控制法。试验表明：当峰值电流、基值电流、脉冲频率等焊接参数改变时，本方法均能保持熔滴过渡为1峰0基的过渡。

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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。

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Tau facilitated the reduction of lea through increasing clamp pulse frequency.

通过增加刺激频率，牛磺酸能促进Ica的减小。

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NEB delays the time of first ovulation through inhibition of LH pulse frequency and low levels of blood glucose, insulin and insulin-like growth factor-I ( IGF-I).

NEB可通过抑制LH脉冲频率、降低血浆葡萄糖、胰岛素和胰岛素样生长-1（IGF-I）因子浓度，从而造成奶牛分娩后首次排卵间隔延长；

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