程控交换/数字信号处理，教程。非常详细了介绍了程控交换的原理-Program-controlled exchange/digital signal processing, tutorial. A very detailed introduction of the principle of program-controlled exchange
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.000971s ]
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:0.076238s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001030s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001189s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000946s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003318s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000850s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003922s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015515s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001298s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 301988 [ RunTime:0.016931s ]
