Objective A new type of three branches aortic arch covered stent graft was explored on treatment of DebakeyⅠaortic dissection,and the surgical effects were evaluated.

Based on the currently available Z-pin micro-model,a Z-pin element was developed and a beam element model was proposed in this paper to study the effect of Z-pins on mode Ⅰ delamination toughness of Z-pinned double cantilever beam(DCB) specimens.

Based on the analysis of sequence type and developing models of the lower Tertiary of Raoyang depression, the controlling factors of every types of sequence are analyzed according to its configuration.

There are three kinds of sequence types including alluvial sequence, lacustrine sequence and fluvial sequence that present in Jizhong basin during the syn extensional stage.

According to the boundary faults and palaeogeomorphology of the sag,the sequence configuration in its slope zone can be divided into .