系统介绍EDA技术的发展概述，相关概念，VHDL语言、MAX+PULS、QUARTUS的设计方法。-System overview of the development of EDA technology, related concepts, VHDL language, MAX+ PULS, QUARTUS design method.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002530s ]
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:0.087243s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001046s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.007002s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.003997s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.014167s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002446s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.005338s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.030459s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001262s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 320061 [ RunTime:0.018364s ]
