分析了激光功率、焊接速度和焦点位置对焊接过程的影响以及保护气体对焊接过程不稳定性的影响。
The influence of laser power, welding speed and the focus position to the laser welding process as well as the assist gas to the instability of the welding process are analyzed.
在电流片两侧的基态速度场与磁场相互平行的位形下，讨论了速度切变对撕裂模不稳定性的影响。
The influence of shear flow along the magnetic field accompanied with a plane current layer on the tearing instability is analyzed.
流线模型不存在数值弥散和不稳定性，比传统的数值模拟速度快，允许节点多。
The streamline model overcomes the numerical dispersion and instability, is faster than the conventional numerical simulation and allows for more nodes.
不稳定性产生的可能机制是由于电子束穿过低密度本底等离子体的漂移速度超过离子声速而激发起来的。
It is suggested that the instability is excited in the low density plasma when the electron beam drift velocities exceed the ion acoustic speed.
结果表明，束的密度梯度和速度梯度使系统的不稳定性加剧，离子束的定向运动能量损耗更快。
The results show that the instabilities become stronger due to these gradient effects, leading to an increase in energy loss of the directional motion of beams.
而群速度失配可极大地改变调制不稳定性增益谱的形状、峰值和位置。
The group-velocity mismatch can considerably change the gain spectrum of modulation instability in terms of its shape, peak value, and position.
而群速度失配可极大地改变调制不稳定性增益谱的形状、峰值和位置。
The group-velocity mismatch can considerably change the gain spectrum of modulation instability in terms of its shape, peak value, and position.
应用推荐