snake算法的几种经典程序，包括的函数有：
Image input/output
% rawread - Read a Portable Bitmap file, or a raw file
% rawwrite - Write a Portable Bitmap file, or a raw file
%
% Image Display
% imdisp - Display an image
%
% Active Contour
% snakeinit - Initialize the snake manually
% snakedeform - Deform snake in the given external force field
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.003201s ]
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:0.086015s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001881s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001983s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002109s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003579s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002097s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003310s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016027s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002563s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 26305 [ RunTime:0.001138s ]
