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如何理解机器学习/统计学中的各种范数norm | L1 | L2 | 使用哪种regularization方法?
参考: L1 Norm Regularization and Sparsity Explained for Dummies 专为小白解释的文章,文笔十分之幽默 减少feature的数量可以防止over fitting,尤其是在特征比样本数多得多的情况下。 L1就二维而言是一个四边形(L1 norm ...
分类:其他好文   时间:2018-04-07 20:07:01    阅读次数:119
MySQL Crash Course #06# Chapter 13. 14 GROUP BY. 子查询
索引 理解 GROUP BY 过滤数据 vs. 过滤分组 GROUP BY 与 ORDER BY 之不成文的规定 子查询 vs. 联表查询 相关子查询和不相关子查询. 增量构造复杂查询 Always More Than One Solution As explained earlier in thi ...
分类:数据库   时间:2018-03-31 11:00:40    阅读次数:226
1058. A+B in Hogwarts (20)
If you are a fan of Harry Potter, you would know the world of magic has its own currency system -- as Hagrid explained it to Harry, "Seventeen silver ...
分类:其他好文   时间:2018-03-10 20:30:46    阅读次数:171
思维题
In Arcady's garden there grows a peculiar apple-tree that fruits one time per year. Its peculiarity can be explained in following way: there are n inf ...
分类:其他好文   时间:2018-03-05 19:29:32    阅读次数:178
A1058. A+B in Hogwarts
If you are a fan of Harry Potter, you would know the world of magic has its own currency system -- as Hagrid explained it to Harry, "Seventeen silver ...
分类:其他好文   时间:2018-02-10 18:14:19    阅读次数:175
1058. A+B in Hogwarts (20)
If you are a fan of Harry Potter, you would know the world of magic has its own currency system -- as Hagrid explained it to Harry, "Seventeen silver ...
分类:其他好文   时间:2017-10-24 21:00:17    阅读次数:162
The JVM Architecture Explained
转自:https://dzone.com/articles/jvm-architecture-explained?oid=18544920 Every Java developer knows that bytecode will be executed by JRE (Java Runtime E ...
分类:其他好文   时间:2017-10-13 00:37:09    阅读次数:191
ThreadLocal
为了防止内存泄露,一旦threadlocal完成任务,最好调用remove() 详见:ThreadLocal explained ...
分类:其他好文   时间:2017-08-28 00:42:24    阅读次数:211
sklearn中拟合结果的评价指标
在sklearn中包含四种评价尺度,分别为mean_squared_error、mean_absolute_error、explained_variance_score 和 r2_score。 1、均方差(mean-squared-error) 2、平均绝对值误差(mean_absolute_err ...
分类:其他好文   时间:2017-07-30 19:00:51    阅读次数:257
How to Add Linux Host to Nagios Monitoring Server Using NRPE Plugin
In our first part of this article, we’ve explained in detail on how to install and configure latest Nagios Core 4.2.0on CentOS 7.2 server. In this art ...
分类:移动开发   时间:2017-07-09 16:19:57    阅读次数:304
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