设计了一个异步时钟域间进行通行的模块，并采用Modelsim进行仿真验证，仿真结果满足预期的目的。-Designed an asynchronous clock domains between the passage of the module, and use Modelsim for simulation, the simulation results meet the intended purpose.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001278s ]
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:0.085820s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001357s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.003081s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001179s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.020559s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001012s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004096s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016039s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001158s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 210710 [ RunTime:0.014774s ]
