OFDM系统，子载波数目1024，前缀数目256，循环数目256，加入了高斯白噪声-OFDM system, the number of subcarriers 1024, the number prefix 256, the cycle number of 256, by adding a Gaussian white noise
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001146s ]
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:0.071845s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001107s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000952s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003774s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000842s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003750s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015448s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001293s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 259542 [ RunTime:0.014382s ]
