自己编写的伯德图、尼奎斯特图、根轨迹图的Matlab绘图程序，虽然小、简单，却很实用。便于大家教学中分析习题。-I have written Byrd map, Nyquist diagram, root locus diagram of the Matlab graphics program, although small, simple, very practical. Facilitate the analysis of U.S. teaching exercises.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001632s ]
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:0.087047s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002561s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002113s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002183s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003752s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002288s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003282s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014578s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002353s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 3120 [ RunTime:0.001227s ]
