查询词典 Doppler range

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。

A software HF channel simulator based on Watterson model was presented according to the characters of multipath, fading, Doppler frequency shift and Doppler frequency spread in HF channel.

对短波信道多径、衰落、多普勒频移及扩展等现象进行了分析，并且基于Watterson离散信道模型，设计了一种全软件的短波信道模拟器，为短波通信系统性能测试提供了条件。

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。

All the above researches are very important to the usage of thelaser Doppler technique in seismic prospecting.The laser Doppler frequency shift of scatters and diffract grating was discusstheoretically.

鉴于地震检波器是制约高分辨地震勘探的重要瓶颈，研究应用激光多普勒效应的新型地震检波器是重要工作之一。

In this paper,the effect of time-delay and Doppler frequency in acquisition of PN code is analyzed, using maximal-length shift register sequence as research object. It is shown that delay-Doppler cross effect is neglectable in most cases.

以m序列为研究对象，首先针对一种典型的相关过程分析了其时延、多普勒频移对相关的联合影响，结论表明两者耦合影响非常小，几乎可忽略不计。

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。

Researches reveal that students who suffer from corporal punishment tend to resort to violence in their future life.

研究表明遭受过肉体惩罚的孩子倾向于在他们今后的人生中使用暴力。

Total sugar of sarcocarp and chlorophyll of pericarp increased firstly, and then decreased afterward along with altitude; Titratable acidity, ascorbicacid and anthocyanin of pericarp were increased along with altitude; The content of protein increased firstly and decreased afterward along with altitude; Carotenoid of pericarp were decreased along with altitude.

果肉总糖和果皮叶绿素含量随海拔高度升高先升高后降低；可滴定酸、维生素C和果皮花青苷含量均随海拔升高而升高；蛋白质在1720m处最大，1420m处最小；果皮类胡萝卜素随海拔升高而降低。