Determining the component number of the link corresponding to a plane graph is a basic problem in studying links via the medial construction.Usually,one can obtain it by performing three kinds of unsigned graphic Reidemeister moves,which do not change the component number of corresponding links,to change large graphs into smaller ones.In this paper,we use more moves to make the reduction more quickly and efficiently.As a result,we obtain the component number of links corresponding to the double triangular-checkerboard lattices with free or periodic boundary conditions and periodic lattices with one cap (i.e.,spiderweb graphs) or two caps.
针对实验器材数量不足、实验成本高等问题导致的实验教学质量下滑,构建虚实结合实验平台对提高实验教学质量意义重大.该实验平台采用B/S架构,在对实验平台工作流程分析的基础上,基于云服务技术,设计并实现了机器人虚拟结合实验平台的仿真与实物实验.所设计的实验平台实现了机器人的模式展示、拆解、写字、小物体抓取等功能,对学生深入了解机器人具有重要的价值,提升了机器人课程实验教学的质量.
