差分脉冲编码：通信工程中经常用到的一个实用算法。这里是matlab的实现。-Differential pulse code: Communications Engineering frequently used for a practical algorithm. Here is the realization of matlab.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001045s ]
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:0.063720s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001028s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001018s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003097s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000969s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003766s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015422s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001115s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 11025 [ RunTime:0.022850s ]
