采用一种改进的故障树分析方法对所得到的故障进行分析，根据每类故障分别建造了多棵故障树，并以最小割集理论按下行法对各树进行了定量分析。
Faults are analyzed by means of an improved fault tree analysis, and several fault trees are built for every kind of faults, then make down-way quantity analysis with the minimal cut set theory.
与基于特征法的其它类似方法相比，C - I法给出了下行和上行波场更明确的描述。
In contrast to other similar schemes based on characteristic method, the C-I scheme gives a clear view for down-going and upcoming wave fields.
方法采用颈部皮瓣悬吊法，经胸骨切迹上切口，鼻内镜辅助下行甲状腺部分切除术7例。
Methods In 7 cases, nasal endoscopy-assisted partial thyroidectomy was accomplished, through skin incision above sternal notch, by using a neck skin lifting method.
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