{"id":3192,"date":"2024-02-27T22:36:00","date_gmt":"2024-02-27T14:36:00","guid":{"rendered":"http:\/\/khsci.com\/docs\/?p=3192"},"modified":"2024-04-07T21:42:34","modified_gmt":"2024-04-07T13:42:34","slug":"fastica","status":"publish","type":"post","link":"https:\/\/www.khsci.com\/docs\/index.php\/2024\/02\/27\/fastica\/","title":{"rendered":"FastICA\u76f2\u6e90\u5206\u79bb"},"content":{"rendered":"\n

\u4e00\u3001\u4ee3\u7801\u8fd0\u884c\u73af\u5883<\/strong><\/h4>\n\n\n\n

MATLAB201<\/span>6\u53ca\u66f4\u65b0\u7248\u672c\u3002 <\/p>\n\n\n\n

\u4e8c\u3001\u7a0b\u5e8f\u4ecb\u7ecd<\/strong><\/h4>\n\n\n
\n
\"\"<\/figure><\/div>\n\n\n

\u6ce8\uff1a\u56fe\u6807\u4ee3\u8868\u8be5m\u6587\u4ef6\u4e3a\u811a\u672c\u6587\u4ef6\uff0c\u53ef\u4ee5\u76f4\u63a5\u8fd0\u884c\uff1b\u56fe\u6807\u4ee3\u8868\u51fd\u6570\u6587\u4ef6\uff0c\u5728\u6ca1\u6709\u8f93\u5165\u53d8\u91cf\u7684\u60c5\u51b5\u4e0b\u65e0\u6cd5\u76f4\u63a5\u8fd0\u884c\u3002\u66f4\u8be6\u7ec6\u7684\u89e3\u91ca\u53ef\u4ee5\u770b\u8fd9\u91cc<\/a>\u3002<\/span><\/p>\n\n\n\n

1.<\/strong><\/span>demoFastICA<\/mark><\/strong>.<\/span><\/strong><\/span>m\u6587\u4ef6<\/strong><\/span><\/p>\n\n\n\n

\u8fdb\u884cFastICA\u7684\u8ba1\u7b97\u548c\u7ed8\u56fe\u7684\u811a\u672c\u7a0b\u5e8f\uff0c\u53ef\u4ee5\u76f4\u63a5\u8fd0\u884c\u3002\u7a0b\u5e8f\u8fd0\u884c\u5b8c\u6210\u540e\uff0c\u5728MATLAB\u7684\u5de5\u4f5c\u533a\uff0c\u53cc\u51fbicasig\u53d8\u91cf\uff0c\u53ef\u4ee5\u67e5\u770b\u6c42\u5f97\u72ec\u7acb\u5206\u91cf\u7684\u5177\u4f53\u6570\u503c\u3002<\/p>\n\n\n\n

\u4ee3\u7801\u8fd0\u884c\u540e\uff0c\u4f1a\u7ed8\u5236FastICA\u72ec\u7acb\u5206\u91cf\u56fe\u3001FastICA\u72ec\u7acb\u5206\u91cf\u53ca\u5176\u9891\u8c31\u56fe\uff0c\u5982\u4e0b\u4e24\u5f20\u56fe\uff1a<\/p>\n\n\n

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\"\"<\/figure><\/div>\n\n
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\"\"<\/figure><\/div>\n\n\n

2.genSig.m\u6587\u4ef6<\/strong><\/span><\/p>\n\n\n\n

\u8be5\u7a0b\u5e8f\u7528\u4e8e\u751f\u6210\u4eff\u771f\u4fe1\u53f7\uff0c\u5e76\u5c06\u6df7\u5408\u540e\u7684\u4fe1\u53f7\u4fdd\u5b58\u4e3adata.mat\u6587\u4ef6\u3002\u8be5\u6587\u4ef6\u4e3b\u8981\u7528\u4e8e\u6848\u4f8b\u6f14\u793a\uff0c\u5927\u5bb6\u6709\u81ea\u5df1\u7684\u6570\u636e\u7684\u65f6\u5019\uff0c\u53ef\u4ee5\u5ffd\u7565\u672c\u6587\u4ef6\u3002<\/p>\n\n\n\n

\u8fd0\u884c\u7a0b\u5e8f\u540e\u4f1a\u7ed8\u5236\u4ee5\u4e0b\u4e24\u5f20\u56fe\u7247\uff1a<\/p>\n\n\n

\n
\"\"<\/figure><\/div>\n\n
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\"\"<\/figure><\/div>\n\n\n

3.pFastICA.m\u6587\u4ef6<\/strong><\/span><\/p>\n\n\n\n

\u4f7f\u7528FastICA\u7b97\u6cd5\u5206\u89e3\u6df7\u5408\u4fe1\u53f7\u5e76\u753b\u56fe\u7684\u4ee3\u7801\uff0c\u8be5\u6587\u4ef6\u4e3a\u51fd\u6570\u6587\u4ef6\uff0c\u4e0d\u80fd\u76f4\u63a5\u8fd0\u884c\uff0c\u9700\u53c2\u8003demoFastICA.m\u6587\u4ef6\u7684\u65b9\u6cd5\u8fdb\u884c\u8c03\u7528\u3002\u51fd\u6570\u6587\u4ef6\u53c2\u6570\u8bf4\u660e\uff1a<\/p>\n\n\n\n

function [icasig, A, W] = pFastICA(mixedsig, numOfIC, g)\n% pFastICA \u4f7f\u7528FastICA\u7b97\u6cd5\u5206\u89e3\u6df7\u5408\u4fe1\u53f7\u5e76\u753b\u56fe\u7684\u4ee3\u7801\n% \u8f93\u5165:\n% mixedsig - \u6df7\u5408\u4fe1\u53f7\u77e9\u9635\uff0c\u6bcf\u884c\u4ee3\u8868\u4e00\u4e2a\u89c2\u6d4b\u503c\uff0c\u6bcf\u5217\u4ee3\u8868\u4e00\u4e2a\u89c2\u6d4b\u70b9\n% numOfIC - \u9700\u8981\u63d0\u53d6\u7684\u72ec\u7acb\u6210\u5206\u6570\u76ee\uff0c\u5982\u679c\u4e0d\u6307\u5b9a\u6570\u76ee\uff0c\u5219\u8f93\u51650\n% g - \u4f7f\u7528\u7684\u975e\u7ebf\u6027\u51fd\u6570\u7c7b\u578b\uff0c\u53ef\u9009'pow3', 'tanh', 'gauss'\n%                       Value of 'g':      Nonlinearity used:\n%                       'pow3' (default)   g(u)=u^3\n%                       'tanh'             g(u)=tanh(a1*u)\n%                       'gauss             g(u)=u*exp(-a2*u^2\/2)\n%\n% \u8f93\u51fa:\n% icasig - \u5206\u89e3\u540e\u7684\u72ec\u7acb\u6210\u5206\u4fe1\u53f7\u77e9\u9635\n% A - \u6df7\u5408\u77e9\u9635\n% W - \u89e3\u6df7\u77e9\u9635\n% icasig = W*mixedsig\n% mixedsig = A*icasig<\/code><\/pre>\n\n\n\n
4.pFastICAandFFT.m\u6587\u4ef6<\/strong><\/span><\/p>\n\n\n\n
\u4f7f\u7528FastICA\u7b97\u6cd5\u5206\u89e3\u6df7\u5408\u4fe1\u53f7\u5e76\u753b\u56fe\u53ca\u5176\u9891\u8c31\u7684\u4ee3\u7801\uff0c\u8be5\u6587\u4ef6\u4e3a\u51fd\u6570\u6587\u4ef6\uff0c\u4e0d\u80fd\u76f4\u63a5\u8fd0\u884c\uff0c\u9700\u53c2\u8003demoFastICA.m\u6587\u4ef6\u7684\u65b9\u6cd5\u8fdb\u884c\u8c03\u7528\u3002\u51fd\u6570\u6587\u4ef6\u53c2\u6570\u8bf4\u660e\uff1a<\/p>\n\n\n\n
function [icasig, A, W] = pFastICAandFFT(mixedsig, numOfIC, g, fs)\n% pFastICAandFFT \u4f7f\u7528FastICA\u7b97\u6cd5\u5206\u89e3\u6df7\u5408\u4fe1\u53f7\u5e76\u753b\u56fe\u53ca\u5176\u9891\u8c31\u7684\u4ee3\u7801\n% \u8f93\u5165:\n% mixedsig - \u6df7\u5408\u4fe1\u53f7\u77e9\u9635\uff0c\u6bcf\u884c\u4ee3\u8868\u4e00\u4e2a\u89c2\u6d4b\u503c\uff0c\u6bcf\u5217\u4ee3\u8868\u4e00\u4e2a\u89c2\u6d4b\u70b9\n% numOfIC - \u9700\u8981\u63d0\u53d6\u7684\u72ec\u7acb\u6210\u5206\u6570\u76ee\uff0c\u5982\u679c\u4e0d\u6307\u5b9a\u6570\u76ee\uff0c\u5219\u8f93\u51650\n% g - \u4f7f\u7528\u7684\u975e\u7ebf\u6027\u51fd\u6570\u7c7b\u578b\uff0c\u53ef\u9009'pow3', 'tanh', 'gauss'\n%                       Value of 'g':      Nonlinearity used:\n%                       'pow3' (default)   g(u)=u^3\n%                       'tanh'             g(u)=tanh(a1*u)\n%                       'gauss             g(u)=u*exp(-a2*u^2\/2)\n%\n% fs - \u91c7\u6837\u9891\u7387\n\n% \u8f93\u51fa:\n% icasig - \u5206\u89e3\u540e\u7684\u72ec\u7acb\u6210\u5206\u4fe1\u53f7\u77e9\u9635\n% A - \u6df7\u5408\u77e9\u9635\n% W - \u89e3\u6df7\u77e9\u9635\n% icasig = W*mixedsig\n% mixedsig = A*icasig<\/code><\/pre>\n\n\n\n
5.FastICA_25\u6587\u4ef6\u5939<\/strong><\/span><\/p>\n\n\n\n
\u7b2c\u4e09\u65b9FastICA\u5de5\u5177\u7bb1\uff0c\u4e0a\u8ff0\u753b\u56fe\u7a0b\u5e8f\u8c03\u7528\u4e86\u5176\u4e2d\u7684\u51fd\u6570\u3002<\/p>\n\n\n\n
\u4e09\u3001\u5feb\u901f\u5f00\u59cb<\/h4>\n\n\n\n
1.\u8fd0\u884c\u6d4b\u8bd5\u811a\u672c<\/strong><\/p>\n\n\n\n
\u5148\u5728MATLAB\u91cc\u6253\u5f00\u4e0b\u8f7d\u597d\u7684\u6587\u4ef6\u5939\uff0c\u7136\u540e\u8fd0\u884c<\/span>demoFastICA.m<\/strong>\u7a0b\u5e8f\uff0c\u7a0b\u5e8f\u8fd0\u884c\u5b8c\u6bd5\u540e\u5982\u679c\u6ca1\u62a5\u9519\uff0c\u4e14\u5de5\u4f5c\u533a\u6210\u529f\u5f97\u5230icasig\u53d8\u91cf\uff0c\u56fe\u50cf\u6b63\u5e38\u7ed8\u5236\uff0c\u5219\u8bf4\u660e\u8fd0\u884c\u73af\u5883\u6b63\u5e38\uff0c\u7a0b\u5e8f\u6b63\u786e\u3002<\/span><\/span><\/p>\n\n\n\n
2.\u5bfc\u5165\u6570\u636e<\/span><\/strong><\/p>\n\n\n\n
\u590d\u5236\u4e00\u4e2ademoFastICA<\/strong><\/span><\/strong><\/span>.m<\/strong><\/span>\u7684\u6587\u4ef6\u526f\u672c\uff0c\u5728\u8fd9\u4e2a\u526f\u672c\u91cc\u505a\u5982\u4e0b\u4fee\u6539\uff1a<\/p>\n\n\n\n
\u6839\u636e\u4f60\u7684\u6587\u4ef6\u7c7b\u578b\u7684\u4e0d\u540c\uff08excel,txt,csv\u7b49\uff09\uff0c\u5c06\u6570\u636e\u5bfc\u5165MATLAB\u7684\u65b9\u6cd5\u6709\u6240\u4e0d\u540c\u3002\u540c\u5b66\u4eec\u53ef\u4ee5\u770b\u535a\u4e3b\u9488\u5bf9\u5e38\u7528\u6587\u4ef6\u7684\u5bfc\u5165\u65b9\u6cd5\u7684\u8fd9\u4e2a\u6559\u7a0b<\/a>\uff0c\u6559\u7a0b\u4e0a\u672a\u5305\u542b\u7684\u6570\u636e\u7c7b\u578b\uff0c\u5927\u5bb6\u53ef\u4ee5\u518d\u53c2\u8003\u8fd9\u4e2a\u6587\u6863<\/a>\u3002<\/p>\n\n\n\n
\u5982\u679c\u4f60\u5df2\u7ecf\u5b9e\u73b0\u4e86\u6570\u636e\u5bfc\u5165\uff0c\u8fd9\u65f6\u5019\u5e94\u8be5\u62e5\u6709\u4e86\u4e00\u4e2a\u4e8c\u7ef4\u6570\u636e\u53d8\u91cf\uff0c\u8fd9\u65f6\u5019\u5c31\u53ef\u4ee5\u8c03\u7528\u51fd\u6570\u8fdb\u884cFastICA\u5206\u89e3\u4e86\uff0c\u9700\u8981\u6ce8\u610f\u8be5\u4e8c\u7ef4\u6570\u636e\u884c\u5217\u65b9\u5411\uff0c\u6bcf\u4e00\u884c\u5e94\u8be5\u4e3a\u4e00\u6761\u6df7\u5408\u6570\u636e\u3002<\/p>\n\n\n\n
3.\u5b9e\u73b0\u7279\u5f81\u63d0\u53d6<\/strong><\/p>\n\n\n\n
\u53c2\u7167demoFastICA<\/strong><\/span><\/strong><\/span><\/strong><\/span><\/strong><\/span>.m<\/strong><\/span>\u6587\u4ef6\u4e2d\u7b2c2\u30013\u6b65\uff0cpFastICA<\/span>\u3001pFastICAandFFT\u51fd\u6570\u7684\u8c03\u7528\u65b9\u6cd5\uff0c\u6839\u636e\u5b9e\u9645\u91c7\u6837\u9891\u7387\u3001\u9700\u8981\u63d0\u53d6\u7684\u72ec\u7acb\u6210\u5206\u6570\u76ee<\/span>\u3001\u4f7f\u7528\u7684\u975e\u7ebf\u6027\u51fd\u6570\u7c7b\u578b\u4fee\u6539\u8bbe\u7f6e\uff0c\u8fd0\u884c\u7a0b\u5e8f\u5373\u53ef\u3002<\/span><\/p>\n\n\n\n
\u56db\u3001\u5173\u4e8e\u5b8c\u6574\u7248\u4e0e\u516c\u5f00\u7248\u4ee3\u7801<\/h4>\n\n\n\n
\u529f\u80fd<\/td>\u5b8c\u6574\u7248<\/td>\u516c\u5f00\u7248<\/td><\/tr>
\u6570\u636e\u5bfc\u5165\u3001\u53c2\u6570\u8bbe\u7f6e\u3001\u5b9e\u73b0FastICA\u5206\u89e3<\/td>\u221a<\/td>\u221a<\/td><\/tr>
\u8f6f\u4ef6\u5168\u90e8\u6e90\u7801\uff08\u51fd\u6570m\u6587\u4ef6\uff09<\/td>\u221a<\/td>\u00d7<\/td><\/tr>
\u6df7\u5408\u77e9\u9635\u6570\u636e\u957f\u5ea6<\/td>\u65e0\u9650\u5236<\/td>200\u4e2a\u70b9\u4ee5\u5185<\/td><\/tr>
\u753b\u56fe\u6c34\u5370<\/td>\u65e0\u6c34\u5370<\/td>\u6709\u6c34\u5370<\/td><\/tr>
\u5bfc\u51faicasig, A, W\u6570\u636e<\/td>\u53ef\u5bfc\u51fa<\/td>\u4e0d\u53ef\u5bfc\u51fa<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\u4e94\u3001\u83b7\u53d6\u516c\u5f00\u7248\u7a0b\u5e8f\uff08\u9700\u4f7f\u7528\u7535\u8111\u6d4f\u89c8\u5668\u6253\u5f00\uff09<\/h4>\n\n\n\n
\n\n    
\n                
FastICA\u516c\u5f00\u7248\u4ee3\u7801<\/h3>\n        
\n                    
\u6587\u4ef6\u5c3a\u5bf8: 493.31 KB<\/div>\n                    
\u66f4\u65b0: 27-02-2024<\/div>\n        <\/div>\n    <\/div>\n    
\n                \n                    <\/g><\/svg>\n                    \u4e0b\u8f7d<\/span>\n                <\/a>\n    <\/div>\n<\/div>\n\n\n\n\n
\u6ce8\uff1a\u516c\u5f00\u7248\u4ee3\u7801\u9700\u4f7f\u7528MATLAB2022a\u53ca\u4ee5\u4e0a\u7248\u672c\u3002<\/p>\n\n\n\n
\u516d\u3001\u83b7\u53d6\u5b8c\u6574\u7248\u7a0b\u5e8f\uff08\u4f7f\u7528\u7535\u8111\u6d4f\u89c8\u5668\u6216\u8005\u624b\u673a\u6d4f\u89c8\u5668\u6253\u5f00\uff09<\/h4>\n\n\n\n
 \u83b7\u53d6\u901a\u9053\u4e00\uff08\u6dd8\u5b9d\uff09\uff1a<\/strong>\u70b9\u51fb\u6b64\u5904\u83b7\u53d6\u5b8c\u6574\u7248\u7a0b\u5e8f<\/a><\/p>\n\n\n\n
\u83b7\u53d6\u901a\u9053\u4e8c\uff08\u672c\u9875\u9762\uff09\uff1a<\/strong>\u70b9\u51fb\u4e0b\u9762\u201c\u7acb\u5373\u652f\u4ed8<\/span>\u201d\u6309\u94ae\uff0c\u4ed8\u6b3e\u540e\u83b7\u53d6\u5b8c\u6574\u7248\u4ee3\u7801\u4e0b\u8f7d\u94fe\u63a5\u548c\u552e\u540e\u8054\u7cfb\u65b9\u5f0f~\u672c\u901a\u9053\u5904\u4e8e\u6d4b\u8bd5\u9636\u6bb5\uff0c\u4f7f\u7528\u8be5\u901a\u9053\u53ef\u4ee5\u989d\u5916\u4f18\u60e0\uff08\u4ec5\u970035\u5143\uff09\u3002\u4ed8\u6b3e\u5b8c\u6210\u540e\u5237\u65b0\u4e00\u4e0b\u672c\u9875\u9762\u5373\u53ef\u770b\u5230\u4e0b\u8f7d\u94fe\u63a5\u3002<\/strong><\/p>\n\n\n\n
\uff08\u6ce8\u610f\u652f\u4ed8\u8df3\u8f6c\u5931\u8d25\u7684\u8bdd\uff0c\u8bf7\u4f7f\u7528\u6d4f\u89c8\u5668\u6253\u5f00\u672c\u9875\u9762\uff09<\/span><\/p>\n\n\n
\n\t\t\t\t\u60a8\u9700\u8981\u5148\u652f\u4ed8 35\u5143<\/b> \u624d\u80fd\u67e5\u770b\u6b64\u5904\u5185\u5bb9\uff01\u7acb\u5373\u652f\u4ed8<\/a>\n\t\t\t<\/div><\/p>\n\n\n\n
\u4e03\u3001\u5b8c\u6574\u7248\u4ee3\u7801\u91cd\u8981\u66f4\u65b0<\/h4>\n\n\n\n
20240227 \u5b8c\u6210\u521d\u7248\u4ee3\u7801<\/p>\n\n\n\n
\u516b\u3001\u5e38\u89c1\u95ee\u9898<\/h4>\n\n\n\n
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