信号与系统MATLAB仿真实验讲义，很适合初学者，理论与实践相结合才是最好的学习方法-Signals and Systems Lecture MATLAB simulations, it is suitable for beginners, combining theory and practice is the best way of learning
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.028580s ]
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:0.642707s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.799346s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.004646s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001867s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.034501s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:1.670885s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.010789s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.029148s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.070750s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 3075 [ RunTime:0.057642s ]
