变维卡尔曼滤波实验代码，参考文献：Y. Bar-Shalom and K. Birmiwal, "Variable
Dimension Filter for Maneuvering Target Tracking," in IEEE Transactions on
Aerospace and Electronic Systems, vol. AES-18, no. 5, pp. 621-629, Sept. 1982.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002056s ]
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:0.088258s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002351s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002337s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002203s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003911s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002030s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003351s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014929s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002335s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 23203 [ RunTime:0.001163s ]
