在前面1维FDTD的基础上给出了2维的FDTD程序。可以帮助我们解决比如波导，光纤中的电磁场计算问题。尤其是给出了边界条件的设置方法。-in front of a peacekeeping FDTD given on the basis of two-dimensional FDTD procedures. We can help solve such as waveguides, optical fiber of electromagnetic computation. In particular, given the boundary conditions be set.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001357s ]
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:0.064858s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001146s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001271s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001087s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003151s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000945s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003435s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014988s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001124s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 7721 [ RunTime:0.015056s ]
