semi

1.The semi freedom short circuit is superposed by parallel plane flow, confluence and ringy turbulence jet.

自由状态下路流场是平行平面流、环形紊流射流及汇流叠加而成。

2.Some properties of adjoint matrix are discussed. The properties are symmetry, antisymmetry, positive definite, positive semi-definite, orthogonal and characteristic value.

摘要讨论了伴随矩阵在对称、反对称、正定、正定、正交、相似和特徵值等方面性质。

3.Newly developed semi automatic grinding wheel balancer for precise grinder detects unbalance vibrative signal by digital phase sensitive detection technique.

介绍新研制成功精密磨床砂轮自动平衡仪。