查询词典 Doppler shift

The virtual instrument combined with Ku-Band Microwave Doppler phase detect radar is used for the sea wave height measurement according to the Doppler frequency of the sea wave echo and stores the data.

结合Ku波段多普勒相检雷达，运用虚拟仪器根据海浪回波的多普勒频率来判断海浪变化，测出海浪波高存储数据。

Objective To investigate clinical significance of color Doppler echocardiographic diagnosis in prenatal diagnosis of fetal congenital heart disease.Methods 520fetuses in24～40weeks were examined by color Doppler echocardiography on four-chamber views and subcostal views to determine CHD.

目的 探讨彩色普勒超声心动图对胎儿先天性心脏病产诊断的临床意义方法使用彩色多普勒超声诊断仪随机对520例胎龄24～40周的胎儿，在心脏超声四腔观基础上结合多切面观察胎儿心内结构，以确定胎儿有无先心病。

In order to decrease the measuring error of signal processing in laser Doppler velocimeter,frequency spectrum correction methods for laser Doppler signal were proposed.

在激光多普勒测速仪中，为了减小由信号处理算法带来的测量误差，提出运用频谱校正算法对多普勒信号的频谱进行校正，详细阐述了能量重心法、比值法和相位差法3种离散频谱校正算法的基本原理，运用这3种算法对理想正弦信号进行仿真，并运用比值法对信号施加不同频率和信噪比的噪音下的正弦信号和实测的多普勒信号进行仿真及实验研究。

Velocity of solid targets and velocity distribution of flowing fields can be measured by Laser Doppler Velocimeter technology based on Doppler Effect.

激光多普勒测速雷达技术利用激光多普勒效应测量固体目标的运动速度，或者流场速度分布。

Methods Transvaginal color doppler sonographywas performed in 42 cases with hysteromyoma and35 cases with adenomyoma to analyze the characteristics of transvaginal two dimensional and color doppler flow with them,and to measurate the resistance index of uterine artery and the RI of focus.50 normal women were chosen for control.

对35例子宫腺肌瘤、42例子宫肌瘤患者行经阴道彩色多普勒超声，分析其二维及彩色多普勒血流特征，并测定各组子宫动脉、病灶周边及内部RI。

Methods:Paticipants consisted of 32 simple VSD patients and 27 simple PDA patients excluded of any other diseases by physical examintation and electrocardiogram and x-ray. Patients were suggested echocardiography before and one week after the surgerys. Parameters such as Left ventricular ejection fraction、Fractional shortening、Left ventricular end-diastolic dimension、Left ventricular end-systolic dimension、Heart rate and Aortal velocity peak were measured.further more ,the Tei index which is originated from Pulse-wave Doppler and Tissue-Doppler Imaging were also calculated under ECG monitoring.

研究对象与方法：研究对象分别为排除其它心脏疾患的单纯动脉导管未闭患儿及单纯室间隔缺损患儿，手术治疗前后于心电监护下先行常规超声检查，获取心率、R-R间期、左室射血分数、主动脉峰值流速、左室收缩末期内径及左室舒张末期内径等值，并分别利用频谱多谱勒及组织多谱勒法测取患儿左室Tei指数(即PW-Tei及TDI-Tei)，多次测量并取其均值。

The quantity computed is the expected clutter power at the output of any specified range gate by the method of integrating reflected energy between constant Doppler loci in range-gate circles with a model of sum and difference antenna gain pattern for APAR. Base on the analyzing of APAR terrain clutter spectrum, Rayleigh, Correlated Log-Normal and Weibull distribution terrain clutter of APAR general pulse signal was simulated with the method of zero memory nolinearity transform.④The Doppler frequency of target echo is simulated on video frequency in this dissertation.

该软件采用了用C语言建立框架结构，而在程序高重复部分和有运算速度要求的地方，用汇编语言编写具有高并行能力程序的方法，不仅满足了系统高运算速度和实时性的要求，也使得软件系统结构模块化，代码具有良好的维护性和重用性；③对机载相控阵雷达HPRF、MPRF的和、差通道地面杂波功率谱进行了较为全面的研究，通过建立由四个子波束构成的机载相控阵雷达杂波和差波束天线方向图数学模型，选取体现高度线杂波的修正的地面后向散射模型，以载机平飞为例，采用沿距离门——等多普勒线区域积分的方法，得到了杂波功率谱，并利用零记忆非线性变换法实现了机载相控阵雷达常规脉冲情况下瑞利分布、对数正态分布和韦布尔分布地面杂波的模拟；④提出了采用在视频上对目标回波的多普勒频率进行模拟的方法。

objective to discuss the application of color doppler for diagnosing osteocarcinoma, fractures, bone tuberculosis and osteomyelitis.methods hp-m2410a color doppler-high-frequency electronic fan-shaped probe was used to observe and analyze fractures, osteocarcinoma, bone tuberculosis and osteomyelitis and their complications.results it had obvious value to diagnose fractures, osteocarcinoma, bone tuberculosis and osteomyelitis, especially for typical disease.

作者单位：湖北红安，红安县人民医院超声科目的探讨彩色多普勒超声在骨癌、骨折、脊椎结核、骨髓炎疾病诊断中的应用。方法采用惠普m2410a型彩色多普勒仪高频探头及电子扇形探头对骨折、骨癌、骨结核、骨髓炎及并发症进行观察分析。结果对骨折、骨癌、脊椎骨结核及骨髓炎的诊断有明显价值，特别是对典型病变的诊断确立。

Cases with renal transplantation were performed with dynamic state CDFIin Ultrasound Dept. of Nan fang Hospital from April, 2005 to October, 2006. Theexamine time is respectively after operation in three days, seven days, one month andthree months. Before operation examine the condition of uropoiesis function such as apair of kidney, ureter, bladder and cardiac function. After operation reexamine thecondition of cardiac function once again, and examine TK detailed and completely:First, using two-dimensional imaging to observe the shape and the volume of the TK.Secondly, using Color Doppler to observe the renal artery and each artery inside theTK. Finally, using pulsed Doppler to measure the peak systolic velocity, enddiastolic velocity and resistance index.

对南方医科大学南方医院超声诊断科自2005年4月～2006年10月对152例同种异体肾移植患者进行动态CDFI监测，超声检查时间分别为术前与术后3d、术后7d、1个月及术后3个月，术前超声检查双肾、输尿管、膀胱等泌尿系功能情况及心脏功能情况，肾移植术后再次对心脏功能情况进行跟踪复查，并对移植肾进行详尽检查：先用二维超声观察移植肾的形态、大小，随后应用CDFI观察移植肾动脉及肾内各级动脉的血流充盈情况，最后用脉冲式多普勒测量收缩期峰值流速、舒张末期流速、阻力指数。

This paper introduces the application background for developing an laser Doppler vibrometer for underwater acoustic communication and expounds the principle of laser Doppler vibrometer and two coherent detection methods.

介绍了激光多普勒振动计用于水下声光通信的应用背景，阐述了激光多普勒振动计的工作原理和两种相干检测方式。

There had been a moment during the breakfast meeting, though, after the backslapping and the small talk and when all of us were seated, with Vice President Cheney eating his eggs Benedict impassively and Karl Rove at the far end of the table discreetly checking his BlackBerry, that I witnessed a different side of the man.

那次早餐会期间，在表示过关心和寒暄以后，我们所有人坐了下来，我注意观察了一下，副总统切尼面无表情地吃着班尼迪克蛋（Eggs benedict，源自美国，以英式松饼、火腿、水煮蛋以及荷兰酱组合而成），卡尔。罗夫在餐桌的远端谨慎地经常查看他的黑莓手机，我目睹了他所不为人知的一面。

Talk Undelete failed; someone else may have undeleted the page first.

Talk 无法删除选定的页面或图像（它可能已经被其他人删除了）。