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学习计划

  • kaggle: pandas, sklearn, numpy, 画图
  • 用户增长
  • 论文阅读: word2vec系列,GNN系列
  • 小程序

知识架构

基础模型

  • Logistic Regression
  • 决策树
  • SVM
  • 集成:Boosting, Bagging
  • GBDT
  • xgboost
  • 随机森林

数学基础

工程基础

  • 偏差(bias),方差(var)
  • precision, recall, accuracy
  • ROC, AUC
  • 正则项 L1,L2不同的原因
  • 损失函数 mse 交叉熵与KL散度
  • 激活函数 softmax, sigmoid, relu, tanh
  • Dropout
  • early stop
  • 梯度消失 relu, batch norm, residual net, w initialize
  • 梯度更新算法 Momentom(指数加权平均), RMSProp, Adam
  • decay learning rate
  • batch norm
  • 残差网络
  • 调参顺序 learning rate -> 正则系数 -> batch size -> hidden size
  • 特征稀疏问题 淘宝
  • 上采样方法 SMOTE
  • 特征工程
    • 缺失值:忽略,中心值填充
    • 噪声:分箱光滑
    • 异常值:去除
    • 归一化,标准化,正则化:sklearn.preprocessing
    • 离散化, 数据变换(log)
    • 特征相关性分析

深度模型

  • MLP
  • LSTM 详解
  • GRU
  • 卷积,pooling

NLP

Graph

无监督

  • DBSCAN
  • TSNE

RecSys

  • 基于内容
  • 协同过滤
  • 深度模型
  • 排序

论文

Recommend

  • Deep Neural Network for YouTube Recommendation

    • 摘要:2016年youtube推荐系统,提出将推荐过程分为matching和ranking2个阶段
  • Wide & Deep Learning for Recommender Systems

    • 摘要:融合了LR模型和深度模型的优点
    • wide: 通过交叉特征能够有效记忆,但是需要人工工程,无法泛化到没出现的特征
    • deep: 通过embedding可以泛化到未出现过的特征,用于学习历史数据中不存在的特征组合
  • Entire Space Multi-Task Model: An Effective Approach for Estimating Post-Click Conversion Rate

  • Real-time Personalization using Embeddings for Search Ranking at Airbnb

    • 摘要:对用户的浏览行为构建embedding,综合考虑了最终的预定结果和地区
    • 精读

NLP

  • Semi-supervised Sequence Learning

    • 摘要:使用自编码器和语言模型2种方法,使用无标记的数据来提升模型性能。训练完之后使用word embedding参数和LSTM权重来初始化监督模型的LSTM
    • 代码
  • Recurrent neural network based language model

    • 摘要:最早提出基于rnn的语言模型:通过预测下一个词来构造损失函数

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