A knowledge_based intelligent expert system of defect analysis of navigational aluminum_magnesium casting is developed by using artificial intelligence technology.
采用人工智能技术，建立了一个基于知识的航空铝镁铸件缺陷分析智能专家系统。
2
Reconstruction with combined bipedicled myocutaneous flap and costal cartilage or artificial materials are better for severe laryngotracheal stenosis and large tracheal defect.
严重喉气管狭窄、闭锁或合并气管大面积缺损以双蒂肌皮瓣、复合肋软骨和人工气管环重建术效果较好；
3
Objective To explore the curative effects for the proximal or distal femoral defect after the excision of femur tumor by allograft combined with artificial joint.