pulse ratio

The mathematical model of 3-phase PWM VSR using state space average method is studied under the high swith frequence at frist, then the pulse time ratio is given using the space vector technology.

在高开关频率下，应用状态空间平均法建立三相电压型PWMVSR数学模型，利用矢量合成原理，推算出各相开关函数占空比。

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For the influence of negative TOD and RSS, the compression ratio of the output pulse increase.

而对于负的TOD和RSS效应, 光脉冲的压缩比增大.

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Each IMA was measured, included its ratio of peak systolic velocity to end diastolic velocity ( S/ D), pulse index ( PI), resistive index ( RI), and the diastolic velocity time integral fraction ( DVTIF) calculated. The statistical analysis was conducted.

测量每条IMA的收缩期峰值与舒张末期流速之比（S／D）、搏动指数（PI）、阻力指数（RI），计算舒张期流速时间积分分数（DVTIF），并作了统计学处理。

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According to the above conclusions, in the small current increase in slope, low ratio of peak current and pulse width, small peak current and processing speed reduction, the electrode wire will wear less than 5 μ m when cutting 105 mm2.

根据上述结论并进行了实验验证，在小电流上升斜率、低峰值电流与脉宽比值和小峰值电流的情况下，加工速度减小较小时切割105mm2时电极丝的损耗在5μm以内。

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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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At the same time, the signal-noise ratio has been improved in the multiple-pulse signal acquisition.

同时也提高了 多脉冲 信号采集的信噪比.

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The laser output energy, dynamic to static ratio, pulse bandwidth ana spectral line width etc. by Q-switching ware mea-sured and analysed theoretically.

测量了调Q后激光输出的能量、动静比、脉宽、谱宽等，并从理论上进行了一些分析。

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The induction of AC-MGB LTP was concomitantly with a decrease in paired-pulse ratio ( PPR ) of EPSCs.

AC-MGB突 触传递的LTP伴随着配对脉冲比率 ( paired-pulseratio,PPR ) 的下降.

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Much higher specifications on pulse energy, peak power, repetition ratio of a TEA ( Transversely Excited Atmospheric) CO2 laser are required by the newly growing applications such as laser propulsion, opto-electronic countermeasures, and strong-field physics, etc.

激光推进、光电对抗及强场物理研究等新兴应用对脉冲TEA（Transversely Excited Atmospheric）CO2激光器的单脉冲能量、峰值功率、重复率等性能指标提出了更高要求。

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The sequential controller, which has four operation modes such as single selection, odd number, even number, and all selection, can be used for single pulse CARS test, realizing time-resolved spectrum, reducing noise and improving signal-to-noise ratio of CARS system.

可以选择采集同步发射的激光信号。其有单选、奇数、偶数、全选四种工作模式，可应用于单脉冲CARS实验，实现时间分辨光谱，同时还可以降低噪音，提高信噪比。

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