For a system, Hamiltonian is invariant under any translation of spatial coordinates.对于一体系, 哈密算符在任何空间坐标变换下是不变的.A multi - distorted invariant orthogonal moments, Jacobi - Fourier moments ( JFM ), were proposed.提出一种多畸变不变的正交...
The obverse of rising unemployment is continued gains in productivity.失业率上升，相对应的是生产率进一步提高。The result has been a giant leap in productivity.其结果是生产力的大幅提高。Wages were rising faster than productivity and this was eating into ...