modulation of pulse doppler frequency based on software drfm

1、

conclusion: doppler and ivc contrast ultrasonography were helpful for the diagnosis of ivc syndrome.

结论：脉冲多普勒及IVC声学造影可进一步帮助明确诊断。

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2、

the spectrum characteristics of synchronous jamming on range and velocity are analyzed. a method for a pd radar to counter the jamming is also discussed.

分析了存在距离-速度同步拖引干扰时的信号频谱特征，研究了一种脉冲多普勒（PD）雷达抗距离-速度同步拖引干扰的方法。

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3、

the pulse doppler ( pd) radar technique in ground-based radar is mainly applied to detecting motive targets in strong clutter jamming circumstance.

地面雷达中的脉冲多普勒（PD）技术主要用于在强杂波背景下对动目标的检测。

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4、

the characteristics of the ground and sea clutter have some important effects on the airborne pd radars with look down mode.

地海面杂波特性对主要采用下视工作方式的机载脉冲多普勒（PD）雷达具有十分重要的影响。

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5、

experimental research of dbs imaging based on airborne pulse doppler radar

机载脉冲多普勒雷达DBS成像实验研究

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6、

design of image simulation of airborne pd radar based on vega

基于Vega的机载脉冲多普勒雷达图像仿真设计

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7、

mitral inflow velocity e, a and e/ a ratio were detected.

在二尖瓣口用血流脉冲多普勒法（PWD）测舒张期血流E峰、A峰、E/A比值。

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8、

the pulse doppler ( pd) radar is used widely in the airborne radar because of its superior performance.

脉冲多普勒（PD）雷达由于其优越的性能在机载雷达中得到广泛应用。

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9、

the random binary phase code phasing pd fuze is a novel modulated system of noise.

随机二相码调相PD（脉冲多普勒）引信，是一种较为新颖的噪声调制引信体制。

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10、

the property of airborne pulsed doppler radar and the methods of counter countermeasures

机载脉冲多普勒（PD）雷达的工作特点及抗干扰措施

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11、

a c-band pulse doppler weather radar receiver is described in detail in this paper.

介绍了一种C波段脉冲多普勒天气雷达接收机。

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12、

instead, turn to your kitchen cupboard for beauty concoctions.

反而应该从你家厨房的橱柜里找美容用品。

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13、

at present, the advanced kitchen cupboard market of beijing is still at elementary developing stage, very large development space exists.

目前，高端厨柜市场仍处在初级发展阶段，存在很大的发展空间。

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14、

for instance, dr. szymanski told me, he likes all the glasses in his kitchen cupboard lined up a certain way.

比如，Szymanski先生告诉我，他喜欢将厨房的所有玻璃杯以特定的方式摆在橱柜里。

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15、

he forcefully took the teapot out of her arms and put it on top of a kitchen cupboard, where she couldn't reach.

他强行把那个茶壶从她怀里抢出来，放到了橱柜的上面，她够不到的地方。

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16、

the captain's cook was a crook because he took the clock locked in the captain's kitchen cupboard.

船长的厨师是个骗子，因为他拿走了锁在船长厨房食柜的钟。

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17、

the very first place that the city mouse took the country mouse to see was the kitchen cupboard of the house where he lived.

城里老鼠带着乡下老鼠参观他的住所。第一个点就是厨房的食品柜。

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18、

secondly, on the basis of the scope of agricultural machinery's traveling speed, incremental rotary encoder ( 360rpm) is used as speed sensor in order to approach to transient speed.

第二，根据农机具工作的速度范围，为了得到尽量接近瞬态的速度测量效果，选择每周输出360个脉冲的增量式光电编码器作为速度传感器。

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19、

magnetic encoder investigation with zero pulse signal

零脉冲高分辨率磁编码器的研制

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20、

collect the mechanical rotary information by encoder, use high-precision clock pulses of 50m to calculate the pulse width of the encoder, and analyse the data with fft spectrum and cepstrum analysis.

采用编码器采集机械的旋转信息，利用频率为50M的高精度计数脉冲来计算编码器脉冲的宽度，并对所采集的数据做FFT频谱和倒频谱分析。

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