Objective To discuss the X-ray and biomechanics characteristic of lumbar spondylolisthesis with intact neuralarch and analyze the pathological course of degenerate lumbar instability.
目的探讨椎弓完整性滑脱症的X线、生物力学特点与退行性腰椎不稳的病理进程。
2
The second problem analyzed is seismic reliability of concrete dam, the artificial neural network model of seismic reliability of concrete gravity dam and concrete arch dam is proposed.