一个简易的数字频率计，可以对一个输入的信号频率进行测量并显示输出，适合VHDL的初学者-A simple digital frequency meter, you can enter the signal of a frequency measurement and display output, suitable for beginners VHDL
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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:0.118416s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000927s ]
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SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000897s ]
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