TL;DR: A wide range of online courses from MIT are available to take for free on edX. It's not a secret, but it feels like it. There's a massive bank of free online courses from some of the biggest ...

参考麻省理工公开课：线性代数课程以及MIT-Linear-Algebra-Notes部分笔记内容，结合个人学习理解完成，目的在于对知识的总结与反刍。 总学习时长约5000min。 课程简介： 它的研究对象是向量，向量空间（或称线性空间），线性变换和有限维的线性方程组。

Self learning of MIT 6.858 Computer Systems Security from MIT Open Courseware. This course is suitable for self learning because it provides labs, lecture videos ...

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This is an important contribution that largely confirms prior evidence that word recognition - a cornerstone of development - improves across early childhood and is related to vocabulary growth. This ...