The negative moment of the beam can not be concluded by the method based on the half-space elastic foundation theory, but the negative moment is proved by the numerical analysis.
基于弹性半无限空间的幂级数法不能计算格构梁上的负弯矩区段，与数值分析的结果不符。
2
The gliding longitudinal wave contains three parts, longitudinal wave beam, negative exponential gliding ivro-tational wave and positive exponential gliding irrotational wave.
滑行纵波系由纵波声束、负指数滑行集散波和正指数滑行集散波三种成份所组成。
3
The beam characteristics with positive and negative branch unstable resonators were compared for end-and edge-pumped lasers.