课程目的：通过设计原理图及印制电路板 图掌握Protel 99 SE的操作方 法，培养大家的动手能力，增 强基本技能。-Course Objective: To design schematic and printed circuit board plans to master the operation of Protel 99 SE methods, and foster our practical ability to enhance basic skills.

matlab语句实现图模型，多用于分析网络用户产品推荐及网络用户潜在社会关系分析模型的建立。-The goal of building systems that can adapt to their environments and learn from their experience has attracted researchers from many fields , including computer science, engineering, mathematics, ph