相对于一般的通信系统而言，低轨卫星通信系统具有信号动态范围大，多普勒频移大且变化速度快，信道起伏剧烈等特点。
LEO satellite communication system has the properties of larger power dynamic range, larger and faster changed doppler frequency shift and rapid fluctuation compared to ordinary communication system.
实验表明，差分式对比传递函数法调焦，具有调焦精度高，调焦速度快，受像移影响不明显，适应性好等优点。
It shows that the differential focussing method by comparing MTFs has perfect performances high speed, high precision focussing, not being affected by image displacement and flexibility etc.
在相同地层结构模型中，间歇性开启断裂中的油气运移速度较永久性开启断裂快；
In the same structural model, hydrocarbon migration rate within interim opening fractures is faster than that of permanent ones.
在相同地层结构模型中，间歇性开启断裂中的油气运移速度较永久性开启断裂快；
In the same structural model, hydrocarbon migration rate within interim opening fractures is faster than that of permanent ones.
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