简单实用的学生成绩管理系统，现在是低碳时代，电子成绩单环保，而且手机通过UC浏览器也可查询，方便快捷。-Simple and practical student achievement management system, it is a low-carbon era, electronic transcr ipts of environmental protection, and the phone browser through the UC can check, convenient an

产生碳纳米管的MATLAB源程序，其结构可调，可用于纳米结构材料建模。-Produce carbon nanotubes MATLAB source, its structure is adjustable, can be used for modeling the structure of nanomaterials.