信号测量时，传感器优化布置的条件数方法。提供自由度信息，输出不同数量传感器的最优布置方案。-signal measurement, the sensor layout optimization of several methods. Provide freedom of information, the number of different sensor output optimal layout of the program.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001251s ]
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:0.073394s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002199s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002006s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001356s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003194s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001169s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003927s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014385s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001243s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 4078 [ RunTime:0.017636s ]
