2psk的调制以及误码率等系统性能比较，里面分为好几个子程序更利于理解编写。-2psk modulation, as well as systems such as bit error rate performance comparison, which is divided into several more conducive to understanding the preparation of subprogram.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001521s ]
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:0.097748s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000834s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001208s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000841s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003260s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000949s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.005747s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.019991s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001157s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 5326 [ RunTime:0.019437s ]
