The 2nd Chongqing workshop on computational and applied mathematics was held at Chongqing University of China on August 16-19,2015.This workshop was in honor of Prof.George C.Hsiao,Prof.Jean-Claude Nédélec and Prof.Wolfgang L.Wendland for their lifelong academic achievements in computational mathematics,in particular,boundary element methods and finite element methods as well as their applications in problems from science and engineering.With great pleasure we dedicate this volume of Joual of Computational Mathematics to Prof.George C.Hsiao,Prof.Jean-Claude Nedelec and Prof.Wolfgang L.Wendland.