matlab下实现的波束形成技术,利用的是ETAM算法进行合成孔径,增加虚拟阵元个数,以提高定位精度。-matlab achieve beam forming technology, the use of the synthetic aperture ETAM algorithm to increase the number of the virtual array elements in order to improve positioning accuracy.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001060s ]
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:0.086241s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001217s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001708s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001022s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003254s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000763s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003671s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015080s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001096s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 26969 [ RunTime:0.018009s ]