梯度下降取负梯度的简单证明，挺有意思的mark一下2022-12-19 10:41:00 本文转载自：http://blog.csdn.net/itplus/article/details/9337515上一篇：Result Maps collection does not contain value for com.man.impet.dao.OrderBeanMapper.map下一篇：mycat分库分表 mod-long