一篇详细介绍高速数据调制解调技术，主要以QPSK信号为例，包括解调和定时，挺好的-A detailed introduction of high-speed data modem technology, mainly as an example QPSK signals, including demodulation and timing, very good
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001753s ]
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:0.081619s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002561s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001239s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001143s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003186s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000838s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003678s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014463s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001269s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 111706 [ RunTime:0.031788s ]
