一篇论文。主要利用特征和估计及三角和方法，研究了二次高斯和的均值性质，并通过初等方法给出了它的 次均值的两个精确的计算公式-Paper. Mainly use features, and the estimates and the triangle and the method to study the quadratic Gaussian and mean nature, and given two precise formula it mean by elementary methods