Based on the analysis of spectrum of pulsed wave, the sampling frequency is selected according to the performance of hardware.
在对方波频谱进行数学分析的基础上，结合硬件条件选择恢复波形的采样频率。
Objective To investigate the characteristics of right ventricular wall motion by the pulsed wave Doppler tissue imaging (PW-DTI).
目的应用脉冲多普勒组织成像（PW DTI）分析正常右室心肌舒缩运动的特点。
The transient scattering of an electrically polarized, 2-d pulsed wave by 2-d inhomogeneous, lossy dielectric cylinder is investigated.
本文研究二维非均匀有耗介质柱在电极化二维脉冲波激励下的瞬态散射。
Objective: to determine clinical value of pulsed wave Doppler tissue imaging (PW-DTI) in evaluating aortic elasticity in coronary heart disease.
目的：探讨脉冲波多普勒组织成像(PW - DTI)在评价冠心病患者主动脉弹性时的应用价值。
The ae sensor calibration system based on pulsed surface wave sound field was built several commercial and self-made ae sensors had been calibrated on it.
建立了基于脉冲表面波声场的声发射传感器标定系统，对商用和自制的几种声发射传感器进行了标定。
Objective to investigate the application of pulsed-wave Doppler tissue imaging (PW-DTI) in evaluating left ventricular systolic and diastolic function in patients with chronic heart failure (CHF).
目的：探讨脉冲多普勒组织成像(PW DTI)技术在评价慢性心力衰竭(CHF)左室舒缩功能方面的应用。
Starting from paraxial wave equation, analytical propagation expressions of hyperbolic secant pulsed beams with narrowband and broadband are derived.
从近轴波动方程出发推导了窄带和宽带双曲正割脉冲光束的解析传输公式。
The AE sensor calibration system based on pulsed surface wave sound field was built, several commercial and self-made AE sensors had been calibrated on it.
建立了基于脉冲表面波声场的声发射传感器标定系统，对商用和自制的几种声发射传感器进行了标定。
By starting from the paraxial wave equation, the analytical expression of the ultrashort Hyperbolic Secant pulsed beam are deduced.
从傍轴波动方程出发，给出了超短双曲正割脉冲光束的解析解。
Bidirectional electric pulse excitation of piezoelectric transducers for pulsed ultrasonic wave is investigated in this paper.
本文对双向电脉冲激励压电陶瓷超声换能器进行实验研究。
When pulsed laser radiation irradiates a PZT ceramic slab, under certain condition there will be unusual shock wave shape like ellipse in the laser induced shock waves in the sample.
当脉冲激光辐照PZT陶瓷片时，在适当条件下，激光在样品中所产生的冲击波形上呈现椭圆状的奇异脉冲信号。
The influence of dynamic thermal effect induced by optical pumping of YAG crystal rod in a pulsed solid laser on the wave front of the output laser beam is studied in this paper.
本文研究了脉冲固体激光器的YAG激光棒光泵浦动态热效应对激光波面的影响。
The acoustic wave field excited by a pulsed point source in a fluid-felled borehole surrounded by horizontal multiple-layered media is solved by the send-analytical method.
针对声波测井薄层探测的需要，用半解析方法求解了地层为水平多层介质时柱状井孔内脉冲点源激发的声场。
Methods RV systolic and diastolic functions were evaluated in 186 patients with mild, uncomplicated hypertension using pulsed-wave Doppler and tissue Doppler echocardiography.
方法采用脉冲及组织多普勒的方法对轻中度高血压病患者的右心室功能进行了评价。
The characteristics of the 2 dimensional echogram, the color Doppler energy imaging and pulsed 2 wave Doppler ultrasound spectrum were studied.
观察分析其二维声像图、彩色能量图及脉冲多普勒频谱特征。
This paper briefly reviews the theory of generation of acoustic wave by pulsed laser in liquid.
本文简要评述了液体中激光产生声波的理论。
Objective To evaluate the local and whole function of different therapy in acute myocardial infarction (AMI) by pulsed-wave Doppler tissue imaging (PWDTI) with echocardiography.
目的应用脉冲组织多普勒成像(PWDTI)技术评价急性心肌梗死(ami)后不同治疗方案对心脏整体及局部室壁功能的改变。
The results show that the periodic oscillation of the immediate distortion is caused by the pulsed laser wave.
结果表明，激光的脉冲作用引起瞬时变形周期性振荡；
Laser-induced plasma shock wave and cavitation bubble by pulsed laser ablation of a metal in water are investigated by a high-sensitive optical beam deflection technique.
采用自行研制的高灵敏度光束偏转测试系统，对脉冲激光烧蚀水下金属产生的等离子体冲击波和空泡效应进行了实验研究。
The electrochemical performance of High Silicon-Iron Anodes Exerted by Square Wave Pulsed Currents (SWPCs) was studied by electrochemical.
采用电化学方法和阳极消耗率评价法研究了高硅铸铁阳极在方波脉冲电流作用下的电化学性能。
The electrochemical performance of High Silicon-Iron Anodes Exerted by Square Wave Pulsed Currents (SWPCs) was studied by electrochemical.
采用电化学方法和阳极消耗率评价法研究了高硅铸铁阳极在方波脉冲电流作用下的电化学性能。
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