“信号与系统”课程中卷积的教学探索

Teaching Exploration of Convolution in the Course of Signals and Systems

卷积是“信号与系统”课程重要的知识点,其计算公式简单,但学生对其具体含义的理解比较困难。从生活案例出发对卷积定义式的教学内容进行了研究,其中以学生津贴模型描述卷积和的计算过程,以落叶腐败模型为例分析卷积积分的定义式。实践证明,这种案例式教学的方式,加深了学生对卷积具体含义的理解和掌握,取得了较好的教学效果。

Convolution is an important knowledge point in the course of Signals and Systems.Although the calculation formula is simple,it is difficult for students to understand its specific meaning.The teaching content of convolution definition is studied from the perspective of life cases.The calculation process of convolution sum is described by student allowance model.Taking the deciduous leaf decay model as an example,the definition of convolution integral is analyzed.It is proved that this cases teaching method deepened understanding and mastery of the specific meaning of convolution for students and achieved good teaching effect.