pulse velocity

The influence of pulse distortion on superluminal group velocity in an anomalous dispersive medium is researched. The result shows that superluminal group velocity does not disappear even if there is no distortion for light pulse.

研究了反常色散介质中脉冲形变对超光速群速度的影响，发现即使光脉冲完全不产生形变群速度仍会超过真空中的光速。

The principle of thermocouple thermometry was used for temperature measurement and the pulse-echo technique for ultrasonic velocity.

温度测量应用热电偶测温原理，声速测量采用脉冲回波技术。

This paper presents a method extracting target acceleration by using discrete Wigner-Ville distribution under low pulse repetition frequency ( PRF) and a finite number of samples, velocity information ( Doppler frequency) of target can be obtained simultaneously by using the time-frequency analysis method.

提出了一种在低脉冲重复频率（PRF）和对目标采样数有限情况下提取加速度信息的方法。用这种离散时频分析方法同时也能获得目标的速度信息（多普勒频率）。

The compensation for third-order nonlinearity effects is discussed. The results show that initial phase mismatch and inclusion of group-velocity mismatching can act to decrease the effects. The conversion efficiency can be increased with good temporal and spatial profiles of SH pulse with compensation methods. 5.

研究结果表明，初始相位失配与群速失配均能有效地补偿三阶非线性效应，提高转换效率，改善脉冲形状和光谱分布。

Each IMA was measured, included its ratio of peak systolic velocity to end diastolic velocity ( S/ D), pulse index ( PI), resistive index ( RI), and the diastolic velocity time integral fraction ( DVTIF) calculated. The statistical analysis was conducted.

测量每条IMA的收缩期峰值与舒张末期流速之比（S／D）、搏动指数（PI）、阻力指数（RI），计算舒张期流速时间积分分数（DVTIF），并作了统计学处理。

A Noninvasive Method for Radial Pulse-Wave Velocity and the Determinants of Pulse-Wave Velocity

一种无创测定桡动脉脉搏波速度的方法及影响脉搏波速度的因素

Object's velocity effect on pulse to pulse frequency shifting RCS measurement

目标速度对脉间变频格式RCS测试的影响

Measurement of Velocity-time Relation in Unsteady Flow by using Plasma Tracers Formed from Sequential Pulse Laser

用序列脉冲激光等离子体示踪方法测量非定常流的速度&时间变化

The experiment results show that the dispersion compensation and pulse compress are realized by using the pulse chrip induced by group velocity dispersion of single-mode fiber cancelling out the pulse induced by SPM of SOA.

实验表明利用普通单模光纤群速度色散导致的脉冲啁啾抵消SOA自相位调制引起的脉冲啁啾，实现了色散补偿及脉冲压缩。

Take the terminal state, transfer time and energy consumption standard as constraint condition, a method of design the optimal energy transfer orbit is given, a transfer orbit based on continuous velocity pulse maneuver is getted and diminish the energy consumption in the orbit transfer.

本文以末值状态，转移时间和能耗指标等作为约束条件，给出了最优能耗转移轨道的设计方法，得到基于连续速度脉冲机动的转移轨道，减小了轨道转移过程中的能量消耗。