In order to enrich the content of the anatomy and histology about andrias davidianus , obtain new data about systematic position and blood circulation physiology and also provide reference for comparative anatomy and vertebrate evolution reseach , we studied the anatomy and histology about andrias davidianus by means of normal inject method , normal paraffin section method , microcopy system and digital camera 本研究主要采用常规血管注射法,常规石蜡切片法,以及光学显微照相系统和荧光显微数码照相系统对中国大鲵( andriasdavidianus )的循环系统进行了比较详细的解剖学观察研究,并对其心脏及血管进行了组织学研究。目的在于丰富中国大鲵解剖学和组织学的资料,为中国大鲵分类地位的探讨和血液循环生理研究提供解剖学依据,同时也为比较解剖学和脊椎动物的进化提供解剖学依据。
Furthermore , the tool - path generation algorithm of rough machining on the workpiece with open pockets is put forward . ( 8 ) two finish machining methods based on solid models are studied : planar - section method and projection method . with projection method a finish - machining algorithm based on triangle meshes of solid surfaces is implemented ( 3 )研究了基于实体模型两种数控精加工方法:截面法和投影法,从工程实际应用出发,用投影法实现了基于实体表面离散的数控精加工算法,设计了三角片的拓扑结构,解决了三角平面片搜索优化问题,实现了刀具轨迹的生成与干涉处理算法。