本程序代码可以准确地生成1－500Hz波形文件，正弦波，方波等。具体功能，下载下来，自己运行一下就知道了-the code can be accurately produce 1-500Hz waveform, sine, square, etc.. Specific functions, downloads, running about themselves will know.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001255s ]
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:0.092528s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002079s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001834s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001255s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.005303s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001627s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.007036s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.025460s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001104s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 124354 [ RunTime:0.017771s ]
