解决多年多地点农林类专业的大量数据的例如方差及均值等数据分析-Solve the multi-year multi-site specialty agriculture, forestry, large amounts of data such as variance and mean, such as data analysis

杆系结构动力响应程序，可以算随机结构的动力响应均值，方差。-Dynamic bar system response procedures, you can count dynamic random structure response mean and variance.