this matlab program is for EEG signal , 计算PSD 功率谱密度谱是一种概率统计方法,是对随机变量均方值的量度。一般用于随机振动分析,连续瞬态响应只能通过概率分布函数进行描述,即出现某水平响应所对应的概率。 功率谱密度是结构在随机动态载荷激励下响应的统计结果,是一条功率谱密度值—频率值的关系曲线
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001260s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.098018s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001234s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001284s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003701s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001070s ]
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SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014543s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001247s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 18583 [ RunTime:0.001382s ]