In this paper,by using the theory of doubly quasi-periodic Riemann boundary value problemandseries expansion of complex variables,the problem of an infinite piezoelectric materials containing adoubly periodic parallelogrammic array of cylindrical inclusions under anti-plane line force andin-plane linecharge is studied.

Energy density and particle density in high energy heavy-ion collisions are calculated with infinite series expansion method and Gauss-Laguerre formulas in numerical integration separately, and the results of these two methods are compared, the higher terms and linear terms in series expansion are also compared.

A new three-dimensional quasi-vectorial beam propagation method based on the series expansion (SE-QV-BPM) is proposed for simulating the optical rib waveguide and directional coupler based on InGaAs/InAlAs multiple quantum wells.