本文利用交结构控制理论的原理研究了全充液飞行器的大角度操纵问题。
The liquid-filled spacecraft large-angle maneuver problem is investigated using the principles of variable-structure control theory.
如果您使用的是一组全充的AA电池来提供电压和电流，那么它们只能支撑几个小时。
If you use a set of fully charged AA size batteries to provide voltage and current they last only a few hours.
结论采用全骨髓直接培养及密度梯度离心法，经3 ~ 5代培养后均可获得相对纯化之骨髓间充质干细胞。
Conclusion Byuse complete marrow direct culture method and density gradient method, after 3 ~ 5 passages, relative purified BMSCs can be obtained.
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