信道仿真的很好程序，可以实现不同参数情况下的信道仿真，比如超宽带系统的室内多径环境信道仿真-channel simulation is a good procedure, can be achieved under different parameters of the channel simulation. For example, UWB system indoor multi-path channel simulation environment
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001075s ]
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:0.073716s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001065s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001158s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000995s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003186s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000922s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003627s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014735s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001277s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 21039 [ RunTime:0.013734s ]
