14-2-Unsupervised Learning ----Word Embedding

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14-2-Unsupervised Learning ----Word Embedding

Introduction 词嵌入(word embedding)是降维算法(Dimension Reduction)的典型应用那如何用vector来表示一个word呢? 1-of-N Encoding 最传统的做法是1-of-N Encoding,假设这个vector的维数就等于世界上所有单词的数目,那么对每一个单词来说,只需要某一维为1,其余都是0即可:但这会导致任意两个vector都是不一样的,你无法建立起同类word之间的联系 Word Class 还可以把有同样性质的word进行聚类(…

Unsupervised Learning: Use Cases

Unsupervised Learning: Use Cases Contents Visualization K-Means Clustering Transfer Learning K-Nearest Neighbors The features learned by deep neural networks can be used for the purposes of classification, clustering and regression. Neural nets are s…

Unsupervised Learning and Text Mining of Emotion Terms Using R

Unsupervised learning refers to data science approaches that involve learning without a prior knowledge about the classification of sample data. In Wikipedia, unsupervised learning has been described as "the task of inferring a function to describe h…

从Word Embedding到Bert模型—自然语言处理中的预训练技术发展史（转载）

转载 https://zhuanlan.zhihu.com/p/49271699 首发于深度学习前沿笔记写文章从Word Embedding到Bert模型—自然语言处理中的预训练技术发展史张俊林你所不知道的事 179 人赞了该文章 Bert最近很火,应该是最近最火爆的AI进展,网上的评价很高,那么Bert值得这么高的评价吗?我个人判断是值得.那为什么会有这么高的评价呢?是因为它有重大的理论或者模型创新吗?其实并没有,从模型创新角度看一般,创新不算大.但是架不住效果太好了,基本刷新了很…

建模角度理解word embedding及tensorflow实现

http://www.jianshu.com/p/d44ce1e3ec2f 1. 前言本篇主要介绍关键词的向量表示,也就是大家熟悉的word embedding.自Google 2013 年开源word2vec算法程序以后,它的简单.高效.实用,很快引起业界众人的关注和应用,为搜索引擎.[广告系统-谷歌的wide & deep learning][2].[推荐系统][1]等互联网服务提供新的基础技术和思路. 何为Embedding? 开篇之前首先需要明白一个概念何为Embedding?Embe…

Word Embedding与Word2Vec

http://blog.csdn.net/baimafujinji/article/details/77836142 一.数学上的“嵌入”(Embedding) Embed这个词,英文的释义为, fix (an object) firmly and deeply in a surrounding mass, 也就是“嵌入”之意.例如:One of the bullets passed through Andrea's chest before embedding itself in a wall…