Diffraction effects in planar wave-sphere interaction

Using the classical Mie scattering theory,we compute the energy density of an arbitrary partial wave(e.g.,the nth order) and then determine that the interaction between an incident planar wave and a sphere of radius a is the one between the sphere and those partial waves the order of which satisfies n≤ka.We also provide a simple expression to describe the diffracted wave in which the angle-dependent functions are employed.The difference between the accurate and the approximate expressions is demonstrated by numerical calculation.     

线性回归粗差点判别在大学物理实验数据处理中的应用

大学物理实验数据处理过程中变量之间的关系大多可以转化为一元线性回归问题,但实验测量数据中可能存在的粗差点会降低其结果的准确性。本文将一元线性回归曲线拟合与C语言程序相结合,采用线性回归粗差点判别法,实现粗差点的剔除,有效地提高判别结果的准确性。