此程序为潮流计算中的雅克比矩阵程序，也是潮流计算的核心部分。-This program for the power flow calculation of the Jacobian matrix program, but also the core of the power flow calculation.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.000900s ]
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:0.075534s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001447s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002071s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001626s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.005560s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001278s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.006587s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.018777s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001103s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 160158 [ RunTime:0.019331s ]
