H BTF fangzhen\chap2_1.m ..............\chap2_2.mdl ..............\chap2_3.m ..............\chap2_4.mdl ..............\chap2_5.m ..............\chap2_6.mdl ..............\chap2_7.mdl ..............\chap2_7f.m ..............\chap2_8.m ..............\chap2_8f.m H BTF fangzhen