²é¿´: 1401  |  »Ø¸´: 7

»ýË®³ÉÔ¨123

гæ (СÓÐÃûÆø)

[½»Á÷] emd·Ö½â+intermittency check(¼äЪÐÔ¼ì²â×¼Ôò)

¿´ÁËһƪӢÎÄÎÄÏ×£¬ÎÄÖÐÌáµ½ÁËÔÚ¶ÔËù²âÇŵĻ·¾³¼¤ÀøÐźŵÄemd·Ö½âµÄɸѡ¹ý³ÌÖмÓÈëintermittency check(¼äЪÐÔ¼ì²â×¼Ôò£¿)À´Ìáȡģ̬ÏìÓ¦£¬ÇëÎÊÕâ¸öintermittency checkÊÇʲôÒâ˼£¿ÔõôÔÚmatlabÖÐʵÏÖ£¿
ÎÄÏ×Ô­ÎÄ:
To extract the modal responses from the measured acceleration response time history of the bridge,an intermittency check should be imposed during the sifting process in the EMD method To separate the waves of different periods into different modes based on the period length.the intermittency check is designed as the lower limit of the frequency that can be included in any given IMF compoent. it can be acheived by specifying a cutoff frequency w for each IMF during its sifting process.the data having frequency lower than w will be removed from the resulting   IMF.

·¢×ÔСľ³æAndroid¿Í»§¶Ë
»Ø¸´´ËÂ¥
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

»ýË®³ÉÔ¨123

гæ (СÓÐÃûÆø)

ÎÄÏ×Òâ˼ÊÇÔÚÿһ¸öIMFɸѡ¹ý³ÌÖÐÉèÖÃÒ»¸ö½ØÖ¹ÆµÂÊw£¬µ±IMF·ÖÁ¿µÄƵÂÊСÓÚÕâ¸öƵÂÊʱȥ³ýÕâ¸ö·ÖÁ¿,ÕâÔÚemdÖÐÔõôʵÏÖ£¿³æÓÑÃÇ£¬ÇóÖ¸µ¼£¡

·¢×ÔСľ³æAndroid¿Í»§¶Ë
2Â¥2016-09-25 21:18:23
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

FMStation

ÖÁ×ðľ³æ (ÖªÃû×÷¼Ò)

¡ï
Сľ³æ: ½ð±Ò+0.5, ¸ø¸öºì°ü£¬Ð»Ð»»ØÌû
3Â¥2016-09-26 08:16:51
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

»ýË®³ÉÔ¨123

гæ (СÓÐÃûÆø)

ÒýÓûØÌû:
3Â¥: Originally posted by FMStation at 2016-09-26 08:16:51
https://www.mathworks.com/matlabcentral/fileexchange/57421-noise-energy-reduction-ratio/content/nerr.m
Noise Energy Reduction Ratio

ÕâÊÇʲôÒâ˼£¿Ã»¿´Ì«Ã÷°×£¡
4Â¥2016-09-26 23:47:49
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

FMStation

ÖÁ×ðľ³æ (ÖªÃû×÷¼Ò)

¡ï ¡ï
Сľ³æ: ½ð±Ò+0.5, ¸ø¸öºì°ü£¬Ð»Ð»»ØÌû
»ýË®³ÉÔ¨123: ½ð±Ò+1 2016-09-27 14:38:14
CODE:
function [NERR,NERf,NERn] = nerr(Io,In,Imf,cutoff)
...
   fprintf(1,'PLEASE SET CUTOFF FREQ. e.g.cutoff=150');
...
% DISCRETE FOURIER TRANSFORM COMPUTATION
...
% FILTERING IN FREQUENCY DOMAIN           

5Â¥2016-09-27 04:52:19
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

»ýË®³ÉÔ¨123

гæ (СÓÐÃûÆø)

ÒýÓûØÌû:
5Â¥: Originally posted by FMStation at 2016-09-27 04:52:19
function  = nerr(Io,In,Imf,cutoff)
...
   fprintf(1,'PLEASE SET CUTOFF FREQ. e.g.cutoff=150');
...
% DISCRETE FOURIER TRANSFORM COMPUTATION
...
% FILTERING IN FREQUENCY DOMAIN           
...

ÇëÎÊÕâ¸öº¯ÊýÊÇÔÚÄĸö¹¤¾ßÏäÀÎÒ×°µÄÈí¼þÀïûÓÐÕÒµ½¡£

·¢×ÔСľ³æAndroid¿Í»§¶Ë
6Â¥2016-09-27 14:39:33
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

FMStation

ÖÁ×ðľ³æ (ÖªÃû×÷¼Ò)

¡ï
Сľ³æ: ½ð±Ò+0.5, ¸ø¸öºì°ü£¬Ð»Ð»»ØÌû
a user-defined function
7Â¥2016-09-27 17:27:54
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

»ýË®³ÉÔ¨123

гæ (СÓÐÃûÆø)

ÒýÓûØÌû:
7Â¥: Originally posted by FMStation at 2016-09-27 17:27:54
a user-defined function

Óû§×Ô¶¨ÒåµÄº¯Êý£¿

·¢×ÔСľ³æAndroid¿Í»§¶Ë
8Â¥2016-09-28 21:04:23
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ »ýË®³ÉÔ¨123 µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[»ù½ðÉêÇë] ¹ú×ÔÈ»ÃæÉϸ´ÅÌ~»¶Ó­ÌÖÂÛ (½ð±Ò+5) +10 ÇçÌì¼ÓÓÍ 2026-08-26 11/550 2026-08-27 16:35 by msuhlx
[»ù½ðÉêÇë] ¿´°åÉÏÕâô¶àÖеģ¬ÓеãÏñ50ÈËȺÀï49¸öÈ˶¼ÊÇÆ­×ÓµÄÄÇÖָоõ¡­¡­ +5 a089 2026-08-26 6/300 2026-08-27 14:05 by jonewore
[»ù½ðÉêÇë] Ôõô¿´Çà»ùÖÐÁËûÓа¡ +5 Ò¶¾Å΢ 2026-08-26 5/250 2026-08-27 10:35 by l_zh2008
[»ù½ðÉêÇë] Ϊʲô ¹ú¼Ê(µØÇø)ºÏ×÷Óë½»Á÷ÏîÄ¿ ûÓзŰñ£¿ 10+3 majunge000 2026-08-26 11/550 2026-08-27 08:42 by ±±¾©À³Òð±à¼­
[˶²©¼ÒÔ°] ÊÛSCIÒ»ÇøT0PÎÄÕ£¬ÎÒ:8.O.55.1.O.54,¿ÆÄ¿ÆëÈ«,¿É+¼± +3 LIbGuocjEEYw 2026-08-26 4/200 2026-08-27 02:01 by Ie9AyIAvGbvs
[»ù½ðÉêÇë] ÎÒ²»Àí½â£¡ +15 Edward_pc 2026-08-26 23/1150 2026-08-26 20:34 by zzuzxg
[»ù½ðÉêÇë] 2026ÄêµÄ¹ú¼ÒÉç¿Æ»ù½ðÏîĿͨѶÆÀÉóµÄйæÔòÓëж¯Ïò¡¢ÐÂÌôÕ½ +7 process2012 2026-08-23 10/500 2026-08-26 19:23 by hmhminy
[»ù½ðÉêÇë] ϵͳ²é²»µ½ +10 ¶­°Ëǧ 2026-08-26 10/500 2026-08-26 16:30 by Equinoxhua
[»ù½ðÉêÇë] ÄÄλ¸ßÈËÖÐÁË£¬°Ñ²éѯµ½µÄ½ØÍ¼Ìù³öÀ´ÈÃÎÒ¿´¿´£¬ÈÃÎÒ³¤³¤¼ûʶ +4 yuleib84 2026-08-26 5/250 2026-08-26 13:40 by yuleib84
[»ù½ðÉêÇë] Ϊʲô¹ú×ÔÈ»²»ÄÜÖ±½Ó¹«²¼ +4 bjdxyxy 2026-08-26 4/200 2026-08-26 13:12 by qingmu1201
[»ù½ðÉêÇë] ÏîÄ¿ÐÅÏ¢ºÍ¾­·ÑÐÅÏ¢ÔÚϵͳÀï¶¼¿ÉÒÔ¿´µ½ÁË +6 wittyboy 2026-08-26 14/700 2026-08-26 10:55 by wittyboy
[»ù½ðÉêÇë] ½ñÌìÎñί»á¿ªÍêÁË£¬Ã÷Ìì³ö½á¹ûÂð +19 angus9576 2026-08-25 23/1150 2026-08-26 10:03 by zp519
[Ö°³¡ÈËÉú] ѧÉúײ¼û¸¨µ¼Ô±ËÍÍâÂô£¬µÚ¶þÌìÈ«°à¶¼³ÁĬÁË +3 ¾¨ÓãÈÚ½ð_Õã½­_É 2026-08-22 3/150 2026-08-26 09:01 by zzuzxg
[»ù½ðÉêÇë] ¹úºÏÏÖÔڲ鲻µ½ÁËÂ𣿠+10 chengyan1220 2026-08-24 20/1000 2026-08-26 08:57 by peasantsprig
[»ù½ðÉêÇë] Ã÷ÌìÓ¦¸Ã¿É²éÁË£¡£¿ +6 chengyan1220 2026-08-23 6/300 2026-08-25 19:45 by zfd97
[»ù½ðÉêÇë] ûÓÐÈκÎÏûÏ¢-ÊDz»ÊǾÍÁ¹ÁË +9 ͼÀ²Í¼À² 2026-08-24 10/500 2026-08-25 11:59 by ÄϺ£Ð¡¸ç
[»ù½ðÉêÇë] ÈËÆø²»ÐÐÁË +11 fansofjerry 2026-08-21 11/550 2026-08-25 11:04 by ¹Â¶ÀµÄÓ¢ÐÛ6
[»ù½ðÉêÇë] ÎÒÃæÉÏÍêµ°ÁË +13 ÇÒÌý»¢Ð¥ 2026-08-20 14/700 2026-08-25 09:10 by mrkang
[»ù½ðÉêÇë] ¿´À´½ñÌì²»»á·Å°ñÁË£¿ +8 chengyan1220 2026-08-21 11/550 2026-08-21 17:52 by dcqxinyang
[»ù½ðÉêÇë] »ù½ð°¡»ù½ð +4 longfie172 2026-08-20 4/200 2026-08-21 08:58 by mark mao
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û