According to analysis result of tubes' cracks fracture observation, it proves that the fracture is quasi-cleavage fracture which is characterized by river pattern.
通过对管束大量电子断口的观察分析，证明了断口为准解理断裂，具有河流花样的特征。
2
The results has shown that the quasiobservation cannot only strengthen the residual test but also can change the structure of the search space.
研究结果表明，伪观测值不但可以增强残差检验，而且可以改变搜索空间的结构。
3
The conditions required to construct, a quasi-inertial celestial reference frame are discussed, and several cases, in which if the ground-based observation can satisfy, arc enumerated.