existence time meaning in English

驻留时间

In modern shortwave communication , the length of signal existence time in single channel is very short for reducing the probability of being intercepted , thus the difficulty of signal detection and extraction increased
摘要在现代短波通信中，作为低截获率通信手段之一，单个信道内信号持续时间大大缩短，从而增加了信号检测与提取的难度。
More precisely , we consider the existence time for a kind of the semilinear schrodinger equation , and the - existence of a solution of the initial boundary value problem for the klein - gordon equation with nonlinear damping and source terms
) dinger方程解的存在时间的估计和一类含非线性阻尼和源项的klein - gordon方程初边值问题解的存在性。
The system of piv is constructed suitable for measuring the particle movement and the flow pattern of particle clusters is visualized in the cfb . under the low and high solid flux , this work also study the aggregate properties such as the two - dimensional shapes , velocity and existence time of clusters on several axial / radial positions
对循环流化床冷态实验台两测试段进行了流型和颗粒团可视化研究，分别获得了较低循环流率下过渡区和在高循环流率下稀相区颗粒团的运动速度，形状，持续时间及其动态变化情况。