文件名称:package_emd

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  • 2018-04-14
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经验模态分解(Empirical Mode Decomposition,EMD)法是黄锷(N. E. Huang)在美国国家宇航局与其他人于1998年创造性地提出的一种新型自适应信号时频处理方法,特别适用于非线性非平稳信号的分析处理。对经过EMD处理的信号再进行希尔伯特变换,就组成了大名鼎鼎的“希尔伯特—黄变换”(HHT)。由于脑电信号处理很少在EMD之后接上希尔伯特变换,在这里仅介绍EMD的相关基础知识。
  EMD其实就是一种对信号进行分解的方法,与傅里叶变换、小波变换的核心思想一致,大家都想将信号分解为各个相互独立的成分的叠加;只不过傅里叶变换以及小波变换都要求要有基函数,而EMD却完全抛开了基函数的束缚,仅仅依据数据自身的时间尺度特征来进行信号分解,具备自适应性。由于无需基函数,EMD几乎可以用于任何类型信号的分解,尤其是在非线性、非平稳信号的分解上具有明显的优势。
  EMD的目的是将信号分解为多个本征模函数(IMF)的叠加。IMF必需要满足以下两个条件:
  (1)函数在整个时间范围内,局部极值点和过零点的数目必须相等,或最多相差一个;
  (2)在任意时刻点,局部最大值的包络(上包络线)和局部最小值的包络(下包络线) 平均必须为零。
   (Empirical Mode Decomposition,EMD)
相关搜索: matlab
emd工具箱使用

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下载文件列表

文件名大小更新时间
package_emd 0 2007-06-27
package_emd\bugfix.sh 216 2007-06-27
package_emd\EMDs 0 2018-04-14
package_emd\EMDs\cemdc.dll.dll 18432 2018-04-14
package_emd\EMDs\cemdc.dll.exp 46 2018-04-14
package_emd\EMDs\cemdc.dll.lib 2638 2018-04-14
package_emd\EMDs\cemdc.m 2354 2007-06-27
package_emd\EMDs\cemdc2.dll.dll 16384 2018-04-14
package_emd\EMDs\cemdc2.dll.exp 47 2018-04-14
package_emd\EMDs\cemdc2.dll.lib 2638 2018-04-14
package_emd\EMDs\cemdc2.m 2362 2007-06-27
package_emd\EMDs\cemdc2_fix.dll.dll 15872 2018-04-14
package_emd\EMDs\cemdc2_fix.dll.exp 51 2018-04-14
package_emd\EMDs\cemdc2_fix.dll.lib 2646 2018-04-14
package_emd\EMDs\cemdc2_fix.m 2312 2007-06-27
package_emd\EMDs\cemdc_fix.dll.dll 17920 2018-04-14
package_emd\EMDs\cemdc_fix.dll.exp 50 2018-04-14
package_emd\EMDs\cemdc_fix.dll.lib 2646 2018-04-14
package_emd\EMDs\cemdc_fix.m 2305 2007-06-27
package_emd\EMDs\emd.m 22275 2007-06-27
package_emd\EMDs\emdc.dll.dll 15360 2018-04-14
package_emd\EMDs\emdc.dll.exp 45 2018-04-14
package_emd\EMDs\emdc.dll.lib 2634 2018-04-14
package_emd\EMDs\emdc.m 2280 2007-06-27
package_emd\EMDs\emdc_fix.dll.dll 14336 2018-04-14
package_emd\EMDs\emdc_fix.dll.exp 49 2018-04-14
package_emd\EMDs\emdc_fix.dll.lib 2642 2018-04-14
package_emd\EMDs\emdc_fix.m 2141 2007-06-27
package_emd\EMDs\emd_local.m 9897 2007-06-27
package_emd\EMDs\emd_online.m 26315 2007-06-27
package_emd\EMDs\make_emdc.m 1361 2007-06-27
package_emd\EMDs\src 0 2018-04-14
package_emd\EMDs\src\cemdc.c 4969 2007-06-27
package_emd\EMDs\src\cemdc2.c 4983 2007-06-27
package_emd\EMDs\src\cemdc2_fix.c 4213 2007-06-27
package_emd\EMDs\src\cemdc_fix.c 4224 2007-06-27
package_emd\EMDs\src\cextr.c 14711 2007-06-27
package_emd\EMDs\src\cextr.h 770 2007-06-27
package_emd\EMDs\src\cio.c 7562 2007-06-27
package_emd\EMDs\src\cio.h 1190 2007-06-27
package_emd\EMDs\src\cio_fix.c 6933 2007-06-27
package_emd\EMDs\src\cio_fix.h 1117 2007-06-27
package_emd\EMDs\src\clocal_mean.c 5085 2007-06-27
package_emd\EMDs\src\clocal_mean.h 790 2007-06-27
package_emd\EMDs\src\clocal_mean2.c 4905 2007-06-27
package_emd\EMDs\src\clocal_mean2.h 752 2007-06-27
package_emd\EMDs\src\emdc.c 4711 2007-06-27
package_emd\EMDs\src\emdc_fix.c 3517 2007-06-27
package_emd\EMDs\src\emd_complex.c 508 2007-06-27
package_emd\EMDs\src\emd_complex.h 512 2007-06-27
package_emd\EMDs\src\extr.c 10473 2007-06-27
package_emd\EMDs\src\extr.h 674 2007-06-27
package_emd\EMDs\src\interpolation.c 2110 2007-06-27
package_emd\EMDs\src\interpolation.h 468 2007-06-27
package_emd\EMDs\src\io.c 7029 2007-06-27
package_emd\EMDs\src\io.h 1165 2007-06-27
package_emd\EMDs\src\io_fix.c 6188 2007-06-27
package_emd\EMDs\src\io_fix.h 1092 2007-06-27
package_emd\EMDs\src\local_mean.c 2838 2007-06-27
package_emd\EMDs\src\local_mean.h 710 2007-06-27
package_emd\examples 0 2007-06-27
package_emd\examples\NSIP2003 0 2007-06-27
package_emd\examples\NSIP2003\emd_fmsin.m 1866 2007-06-27
package_emd\examples\NSIP2003\emd_sampling.m 896 2007-06-27
package_emd\examples\NSIP2003\emd_separation.m 1334 2007-06-27
package_emd\examples\NSIP2003\emd_triang.m 704 2007-06-27
package_emd\examples\NSIP2003\ex_online.m 2065 2007-06-27
package_emd\examples\NSIP2003\triangular_signal.m 378 2007-06-27
package_emd\examples\SPL2007 0 2007-06-27
package_emd\examples\SPL2007\bivariate_EMD_illustration.m 1277 2007-06-27
package_emd\examples\SPL2007\bivariate_EMD_mean_definitions.m 2977 2007-06-27
package_emd\examples\SPL2007\bivariate_EMD_principle.m 3936 2007-06-27
package_emd\examples\SPL2007\dirstretch.m 614 2007-06-27
package_emd\examples\SPL2007\float_position_record.mat 8545 2007-06-27
package_emd\index_emd.m 4483 2007-06-27
package_emd\install_emd.m 1562 2007-06-27
package_emd\ls-R 1004 2007-06-27
package_emd\revert_bugfix.sh 216 2007-06-27
package_emd\uninstall_emd.m 2128 2007-06-27
package_emd\utils 0 2007-06-27
package_emd\utils\addtag.m 791 2007-06-27
package_emd\utils\boundary_conditions_emd.m 3546 2007-06-27
package_emd\utils\cemd_disp.m 2547 2007-06-27
package_emd\utils\cemd_visu.m 2823 2007-06-27
package_emd\utils\cenvelope.m 2053 2007-06-27
package_emd\utils\dirstretch.m 1248 2007-06-27
package_emd\utils\disp_hhs.m 1583 2007-06-27
package_emd\utils\emd_visu.m 3216 2007-06-27
package_emd\utils\extr.m 1938 2007-06-27
package_emd\utils\findtag.m 1044 2007-06-27
package_emd\utils\hastag.m 659 2007-06-27
package_emd\utils\hhspectrum.m 1445 2007-06-27
package_emd\utils\io.m 504 2007-06-27
package_emd\utils\plot3c.m 798 2007-06-27
package_emd\utils\plotc.m 3243 2007-06-27
package_emd\utils\rmtag.m 820 2007-06-27
package_emd\utils\toimage.m 3003 2007-06-27

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