School of Mathematics,Jilin University,Changchun,130012;
School of Science,Changchun University of Science and Technology,Changchun,130011;
Department of Applied Mathematics, Dalian University of Technology, Dalian, 116024;
School of Mathematics,Jilin University,Changchun,130012;
School of Science,Changchun University of Science and Technology,Changchun,130011;
Department of Applied Mathematics, Dalian University of Technology, Dalian, 116024;
partially linear model; local linear estimation; two stage method; general likelihood ratio test;