本程序实现了IFFT以及和连续变换的对比，并对连续以及离散的OFDM系统的对比-This procedure, as well as implementation of the IFFT transform and continuous comparison of continuous and discrete OFDM system comparison
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001025s ]
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:0.060466s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000934s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001167s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000895s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003096s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000867s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003627s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014324s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001121s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 154033 [ RunTime:0.011320s ]
