第五章研究了二维脉冲竞争模型的持久性和灭绝性。
In chapter 5, we discuss the permanence and extinction for two class of two dimensional impulsive competitive model.
目的：评价X线和二维脉冲多普勒超声对法乐氏五联症的诊断价值。
Objective: To evaluate the diagnostic value of X-ray and two-dimensional pulse Doppler ultrasound for the Fallot's pentalogy.
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。
The transient scattering of an electrically polarized, 2-d pulsed wave by 2-d inhomogeneous, lossy dielectric cylinder is investigated.
讨论二维脉冲时滞直接控制系统的振动性质，给出线性反馈控制下振动与非振动的实例。
The oscillation property of two dimension impulsive time-delay direct control systems is studied.
在二维超声心动图上用脉冲多普勒（PD-2D）测量计算反流容积（RV）和反流分数（RF% ）。
The regurgitant volume (RV) and regurgitant fraction (RF) calculated by two dimensional pulsed Doppler (2D-PD) method were served as reference values.
该方法利用单脉冲雷达空间双路接收的特点，采用时-空二维联合处理的方法对回波信号进行处理。
This method utilizes the multiple receiver of monopulse tracking radar, and adopts the time-space processing method to process the echo.
基于金属材料熔化、汽化界面二维扩展机制建立了脉冲激光的焊接模型。
Based on the metal melt and vaporized interface 2d propagation mechanism, this paper founds the pulsed laser welding model.
本文针对求解二维波动方程的参数问题，利用有限元方法把波动方程反问题转化为有限元反问题，并利用脉冲谱技术，即一个迭代过程进行求解。
In this paper, for solving the parameter problem of two dimensional wave equation, the method of Finite Element and the Pulse Spectrum Technique, i. e. the iterative process are used.
本文报道了利用乘积算符方法分析多脉冲及二维FT-NMR实验的模拟程序PROPER-MT。
The simulation program PROPER-MT for analysis of multiple-pulse and two-dimensional FT NMR experiments using the algebra of product operators is reported.
用脉冲示踪法对二维三相循环流化床液体停留时间分布(rtd)进行了测定。
Pulse tracer method was used to measure the residence time distribution (RTD) in Two-dimensional Three-phase circulating fluidized bed.
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。
The characteristics of the 2 dimensional echogram, the color Doppler energy imaging and pulsed 2 wave Doppler ultrasound spectrum were studied.
方法采用二维、脉冲式多普勒超声检测DSE患者左室收缩和舒张功能。
Methods The left ventricular systolic and diastolic function of patients was evaluated using two-dimensional and pulse Doppler echocardiography by DSE.
二维动态nmr谱通常可由三脉冲实验得到。
In general, two dimensional dynamic NMR spectrum can be obtained by means of three-pulses experiment.
目的联合应用二维、M -型超声心动图与脉冲多普勒技术评价高血压左心室不同构型左房功能改变。
Objective To evaluate left atrial function by 2-de, M-mode and pulsed Doppler echocardiography in different patterns of left ventricular geometric models.
研究微米级磁致伸缩微位移机构的控制技术，设计并实现了一个二维平面行走伸缩机构的PWM脉冲驱动控制系统。
The control mechanism of magnetostrictive microdisplacement actuator is investigated. A PWMbased system to control a microdisplacement actuator of two dimensions is designed and implemented.
对脉冲喷嘴腔内流场进行了二维非定常数值模拟，通过对腔内压力和流场的分析，验证了上述结论；
The 2D unsteady simulation of the nozzle chamber has been done and the analyses prove the early results.
对脉冲喷嘴腔内流场进行了二维非定常数值模拟，通过对腔内压力和流场的分析，验证了上述结论；
The 2D unsteady simulation of the nozzle chamber has been done and the analyses prove the early results.
应用推荐