�B�m(x��)С��׃�Q�ښ�غͽ�ˮ׃��еđ�(y��ng)��

��r�g��2012-06-25 10:24 ��Դ��ˮ�W(xu��)��(b��o) ��: ��ƽ ʷ��I ��ÿ� �� x��2607

С��Ǐ�Fourier׃�Q�l(f��)չ��,��Ƕ�ֱ��ʷ��,��(y��u)��Fourier׃�Q�ĵط��ڕr��l��ͬ�r��õľֲ��|(zh��)[1],��,��S��W(xu��)�ߌ�ԓ��Y�ϵķ��С��ռ��С��׃�Q�r��ֲ��Ե��c(di��n),��ͺ��1915~2000�궬��ȫ��ƽ��ؕr�g��Y��M(j��n)��С��,��о��˺��ͺ��ڲ�ͬ�r�g�߶��ϵĚ�ؠ�r��ָ��׃��A��,��Ժ�ͻ׃�Ե��,��ʾ��L�ڵĚ��׃��Ҏ(gu��)�ɡ�

��ؑc��L��ؼ��ˮ�^�y�Y��,��MHF(ī��ñ��(sh��))С��ؑc��ļ��ؼ��ˮ�ĕr�gһ�l�ʵĶ��ӴΕr�g�߶�׃��,��С��׃��r��ֲ� ��c(di��n),��A��؅^(q��)��ˮ�r�g��Y��˶��r�g�߶�С��,��С��׃�Q��(n��i)�ɹź��׹��^(q��)��κ��\��5O��ļ��ء��ˮ��׃��,��˽��ڲ�ͬ��?q��)Ӵ��ϵ�Ԕ�?x��)�Y(ji��)��(g��u),��δ��׃څ��Ҳ�M(j��n)��˶��Եع�Ӌ(j��)��С��D�_��д��ڵ��Ҫ��ʎ,��

1.ī��ñС��׃�Q��䑪(y��ng)��

С��׃�Q�Ļ��(sh��)�W(xu��)˼��Ҳ��һ�庯��(sh��)��ʾ��ƽ�һ��̖�򺯔�(sh��),��@һ�庯��(sh��)�Q��С��(sh��)�壬��ͨ�^һ��С��(sh��)��ƽ�ƺ��s�õ�,�,��C��С��׃�Q�ķֱ�^(q��)��S��s��n��׃��׃,��(d��ng)n�^С�r,��l��ķֱ��^���r��ķֱ�t�^��,��(d��ng)n��r,��l��ķֱ��ӣ��r��ķֱ��ʄt�pС��@Ȼ,��С��ֱ��ʵ��@�N׃��Ҏ(gu��)��ʹ��С��׃�Q�ڸ��l�ʕr��Ԅ�׃խ,��ڵ��l�ʕr��Ԅ�׃��Ķ�ʹ��С��׃�Q��l��c�r�g֮�g�_(d��)��һ�N��ѵĺ��C,��

1.1ī��ñС��׃�Q

ī��ñ(Mexican hat)С��һ�N��õĻ��С��,��Gauess��(sh��)�Ķ��A��(d��o)��(sh��)��?y��n)��ī��ñ�Ľ��,��ԷQ�@��(sh��)��ī��ñ��(sh��),��MarrС��MHF��С��׃�Qϵ��(sh��)wf(a,b),��S��(sh��)a��ƽ��b��׃��,��b��M��(bi��o)��a��v��(bi��o)��P(gu��n)��wf(a,b)�Ķ��S��ֵ��D,��Q��С��׃�Qϵ��(sh��)�D,��ͨ�^С��׃�Qϵ��(sh��)�D��Եõ��P(gu��n)�ڕr�g��׃��С��׃�Q��ڳ߶�a��ͬ��r��,��С��׃�Qϵ��(sh��)�S�r�g��׃��^�̷�ӳ��ϵ�y(t��ng)��ԓ�߶��µ�׃��С��ϵ��(sh��)��(y��ng)��ƫ��,��ؓ(f��)��С��ϵ��(sh��)��(y��ng)��ƫ��ڣ�С��ϵ��(sh��)��㌦��(y��ng)��ͻ׃�c(di��n);С��ϵ��(sh��)�^��ֵԽ��,��ԓ�r�g�߶�׃��Խ�@��,��

��(n��i)��ՈҊ��

����D(zhu��n)�d��ǳ��ڂ��f��Ϣ֮Ŀ�ġ��Ё�Դ��(bi��o)ע�e�`��ַ��ĺϷ��(qu��n)��,��Ո��߳֙�(qu��n)��C��c��W(w��ng)(li��n)ϵ,��҂��r��h��,��x�x,��