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。
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.
分别对开胸犬及7例二尖瓣金属瓣置换术后患者利用多普勒组织成像中的速度时间积分曲线对放置钛夹处心肌及二尖瓣环处的长轴运动位移进行定量研究；
Quantitative study was made on time velocity integral(TVI) of the implanted myocardium and left ventricular long axis in 7 canine models, and 7 patients with replaced metal mitral valve.
纵向位移是测量收缩期心肌运动幅度，显现为心肌节段的速度-时间积分。
Longitudinal displacement measures myocardial motion amplitudes in systole and visualizes the segmental velocity - time integrals.
积分时间和滤波器的量值等因素会影响仪器总的测量速度。
Certain actors such as integration period and the amount of filtering may affect overall instrument measurement speed.
推导了基于NASA标准解体模型的碎片分离速度概率密度函数，建立了计算航天器与单颗碎片碰撞概率的时间积分算法。
Space debris delta-velocity probability density function was deduced by NASA's standard breakup model, and time integral algorithm of collision probability between spacecraft and any debris was built.
利用积分算法，实现了对瞬时速度、制动距离和制动时间的测量。
Using integral algorithm to realize the computing of braking speed and braking distance and time.
对废弃矿井甲烷涌出速度对时间的曲线按时间积分到无穷大，可以得到计算时刻的废弃矿井资源量。
To integrate the curve of abandoned mine methane emission rate versus time to infinity against time, can get abandoned mine CBM resources at the time of estimating.
出于算法运行速度和准确性的考虑，着重研究了QRS波检测的两种算法：一阶微分窗口积分法和小波时间-尺度检测法。
On account of the operation speed and accuracy, we researched two algorithms used in QRS detection: derivative-window method and wavelet-based method.
在对边界层速度合理假设的基础上，求解了动态积分方程，给出了依时间和空间变化的边界层厚度响应函数。
The dynamical respondent functions dependent of the time and the space for the velocity boundary layer are different from the classical results.
在对模型进行受力分析后，文章接着通过显式积分求解出各质点下一时间片的位置和速度。
After accomplishing model forces analyses, Explicit Integration is implemented to calculate positions and velocities of all particles in the next time step.
对于时间周期小于半秒，陀螺仪的积分将会占优，水平加速度的噪声将会被滤去。
For time periods shorter than half a second, the gyroscope integration takes precedence and the noisy horizontal accelerations are filtered out.
对于时间周期小于半秒，陀螺仪的积分将会占优，水平加速度的噪声将会被滤去。
For time periods shorter than half a second, the gyroscope integration takes precedence and the noisy horizontal accelerations are filtered out.
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