电力系统计算应用广泛的高斯消元法，用来对参数矩阵进行降阶消元。-Gauss elimination is also called Gauss-Jordan elimination, which is used to reduce the dimension of a matrix so that it can be solved easily.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001308s ]
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:0.106608s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001410s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001536s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003599s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001183s ]
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SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014422s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001389s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 299106 [ RunTime:0.001349s ]
