主要内容：
潮流计算的数学模型及解算方法
潮流方程的特殊解法
潮流计算中的特殊问题
潮流计算问题的扩展
-main elements : the trend of a mathematical model and solution methods of the special power flow equations flow calculation method to the special problems of the power flow calculation expansion
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001824s ]
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:0.081907s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.011792s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002026s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001548s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.004451s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001196s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.006823s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016874s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001180s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 301639 [ RunTime:0.020483s ]
