中文说明：
用改进的粒子群算法对基于非对角MAC矩阵元素均值最小目标函数为目标函数，以简支梁前三阶模态振型为原始数据对简支梁进行传感器优化布置。
English Description：
Based on the improved particle swarm optimization algorithm, the minimum objective function of the mean value of the off diagonal MAC matrix elements is taken as the objective function, and the first three modal shapes of the simply supported beam are taken as the original data to optimize the sensor placement of the simply supported beam