应用背景这
程序实现位二进制擦除信道翻转算法。这里
y 是接收的矢量和 H 是奇偶校验检查矩阵。 我已经任意奇偶校验检查矩阵.如果 y 的项，则为-1，这意味着它
被擦除。程序运行后，请要获取新的类型 M 收到
矢量。关键技术此代码是在通信技术中非常有用。现在天 LDPC 码是非常有用和强大的什么背景是二进制擦除信道，需要二进制对称信道。位翻转算法是非常重要的算法，此程序实现了 ldpc 码的二进制擦除通道。
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001194s ]
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:0.061197s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001066s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001141s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000981s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003043s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000790s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003687s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.013889s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001056s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 10439 [ RunTime:0.017192s ]
