Objective To evaluate the clinical value of fetal umbilical arterial Doppler spectrum fractal.
目的探讨脐动脉多普勒信号分数维测定在产科的应用价值。
According to Doppler theory, simulated echo signal comprise the corresponding Doppler Spectrum, then ocean current velocity can be simulated.
并根据模拟回波信号中包含有相应的多谱勒谱的信息，模拟了海流的流速。
This paper introduces several methods retrieving wind direction from HF radar echo Doppler Spectrum and analyses the feature of those methods.
本论文介绍了现有的从高频雷达回波多普勒谱中提取风向的几种方法，分析了这几种方法的不足之处。
Orthogonal detection can give us both the amplitude information for gray-scale imaging and phase shift information for doppler spectrum analysis.
正交检波方法既能给出灰度超声成像所需要的回波的幅值信息，也能给出多普勒超声成像所需要的回波的相移信息。
In regard of evaluating miss distance of using missile fuze Doppler spectrum data, a optimizing parameter estimated method of nonlinear least square is put forward.
针对利用导弹引信多普勒频率数据求取脱靶量的问题，提出了一种非线性最小二乘优化参数估计方法。
Results:The blood flow was abundant around the cancer tissue. The color signal of blood flow showed garland-like or punctate. The feature of its Doppler spectrum was o…
结果：前列腺癌周边血流丰富，彩色血流信号呈花环状或点棒状，多普勒频谱测值为高阻力指数特征。
The wireless propagation environment is described first: analyzing the small-scaled fading, including amplitude fading, multi-path time delay and Doppler spectrum spread.
在本论文中，首先对移动传播环境作了描述，特别是对小尺度多径传播造成的幅度衰落，多径时延和多普勒频移进行了分析；
Umbilical arterial Doppler spectrum were obtained by color Doppler ultrasound, then Doppler signal were transformed into computer through sound frequency, and fractal were calculated.
用彩色多普勒超声检测脐动脉并获得多普勒信号，将此信号以音频形式输入计算机中，对此信号进行处理并计算分数维。
Objective To investigate the influence of simulated heart motion on the Doppler spectrum velocity - time integral (VTI) of simulated blood flow measurements through an in vitro model.
目的探讨体外模拟心脏运动对多普勒血流流速曲线速度时间积分(VTI)测定的影响。
If you have a binary system whereby both stars are visible so you get the spectrum of both stars, then you see the Doppler shift of both stars in the spectrum.
若存在一个双星系统，两颗恒星均看不见，你能得到双星的光谱，然后在光谱中看到，双星的多普勒顿移。
With modern spectral estimation algorithm, spectrum analysis on Doppler frequency caused by vehicles radar movement is carried out in DSP chip.
利用现代谱估计的算法，在DSP芯片中对检测车辆雷达运动产生的多普勒频率进行频谱分析。
Mechanism of Doppler blood flow ultrasonic spectrum of the polycystic kidney was discussed.
本文还讨论了多囊肾血流多普勒频谱变化的机制。
Conclusion: The color Doppler flow spectrum have high applicated value in early diagnosis of small mammary cancer.
结论：彩色多普勒血流频谱形态在小乳腺癌早期诊断中具有较高的应用价值。
Objective: to research the characteristics of TCD (Transcranial Doppler) abnormal spectrum contour of normal person group on plateau.
目的：研究高原地区正常人群TCD(经颅多普勒)异常频谱形态的特点。
In the experiment, We have found that bubbles at various grades are distinctly different in the envelopes of Doppler echo spectrum.
通过实验，作者发现了不同级别的气泡在多普勒回波频谱包络上有明显区别。
It uses a conventional constant false-alarm-rate(CFAR) detection procedure but the thresholding scheme is based on regression analysis of power spectrum values along range and Doppler cells.
该方法采用传统的恒虚警率（CFAR）检测方法，但其门限设置是基于沿距离和多普勒单元功率谱值的回归分析。
Following discussions on the principle of Doppler, the classification of the deformation, and analysis of signal spectrum, a continuous and rapid method for the measurement is presented.
通过对超声多普勒原理、路面变形的分类研究及测试信号谱分析的详细讨论和研究，给出了一种连续、快速检测沥青路面变形情况的方法。
Objective To study the Doppler flow spectrum of fetal hepatic vein.
目的探讨胎儿肝静脉的多普勒血流频谱及其临床意义。
Objective: To study on the changes of right cardiac afterload and right ventricle pumping function according to different operation ways after pulmonary resection by Doppler pulmonary flow spectrum.
目的：运用多普勒肺血流频谱，观察不同术式的肺切除后右心后负荷及泵功能的变化情况。
Objective To evaluate the clinical value of tissue Doppler imaging(TDI) and pulmonary venous flow spectrum in the assessment of left ventricular diastolic function by E/A ratio.
目的通过组织速度图舒张时间、肺静脉频谱及二尖瓣环E/A比值评价冠心病患者左室舒张功能。
Fixing the spectrum width of the weather echo signals, we change theirs mean Doppler frequency and filter them using regression filter. After filtering, we analyze the attenuation of them.
在天气回波信号谱宽固定的情况下，通过改变天气回波信号的平均多普勒频率，分析了回归滤波器对它的衰减情况。
The high resolution spectrum can be obtained through many methods, such as saturated absorption spectroscopy, Doppler free methods of two-photon spectroscopy, and etc.
提高热原子光谱的分辨率可以有许多方法，如饱和吸收光谱技术、双光子光谱的消多普勒技术等。
Conclusions: The Doppler flow spectrum is an important index for differential diagnosis of thyroid lumps.
结论彩色多普勒血流频谱形态是鉴别甲状腺良恶性肿块的一项值得重视的指标。
The statistic model of air-ground radio communication channel is characterized by the multipath fading, Doppler power spectrum and delay power spectrum.
空地通信信道的主要统计特性包括多径衰落特性、多普勒功率谱和时延功率谱。
Objective 1 To evaluate the character of color Doppler and frequency spectrum Doppler of cerebral artery stenosis by examining the patients who were suspected with cerebrovascular disease with TCCS.
目的1对怀疑有脑血管疾病的患者进行经颅彩色多普勒超声（TCCS）检查，探讨颅内动脉狭窄的彩色多普勒及频谱多普勒特征。
Results : There were 19 cases of lymph node micrometastases in 15 patients with the rich in color Doppler and morphological changes in blood flow , and 12 patients were arterial flow spectrum .
结果 ：在回顾分析有淋巴结微转移的19例患者的彩色多普勒成像中，15例得到丰富的形态学改变或血流显示，且有12例获得动脉血流频谱。
Methods The manifestation, internal echo, the L/T ratio, CDFI and RI frequency spectrum feature of the superficial lymph nodes were studied with high frequency and color Doppler ultrasound 89 cases.
方法本组89例，应用高频率的彩色多谱勒超声检查肿大淋巴结的形态及内部回声、纵横比（L/T）、彩色多谱勒血流显像（CD FI）及阻力指数（RI）的频谱特征。
AIM: To detect the flow frequency spectrum of diabetic rabbits with color Doppler imaging (CDI), and evaluate the flow characteristic and occurrence mechanism of early diabetic retinopathy (DR).
目的：应用彩色多普勒技术检测糖尿病兔视网膜血流频谱，旨在探讨糖尿病视网膜病变早期血流变化的特点及其发生机制。
The frequency spectrum of continuous wave Doppler composed of two merged regurgitant jets.
二尖瓣返流连续多普勒频谱为2束返流共同形成的叠加频谱；
The frequency spectrum of continuous wave Doppler composed of two merged regurgitant jets.
二尖瓣返流连续多普勒频谱为2束返流共同形成的叠加频谱；
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