2010Vϲh(hun)Ƽ˾{\ŞI(y)ԭtɞV݁\(yn)坍λɹV݁\(yn)_ĻأVҕVСUΨһָλԼ坍ʮÏV݁\(yn)׃òؕI(xin)AһµĺuI(y)ˡϲI(y)Ʒ
һ һ ĩ F(xin)ǵ2 һ2