神经网络学习中的矢量量化算法，VC编写完整源代码，很有参考价值。-neural network learning vector quantization algorithm, the preparation of VC source code integrity, of great reference value.
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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:0.091338s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001415s ]
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SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000837s ]
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